MIC5159. General Description. Features. Applications. Typical Application. Programmable Current Limit µcap LDO Regulator Controller

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1 Programmable Current Limit µcap LDO Regulator Controller General Description Micrel s is a precision-voltage regulator controller. Used with an external P-Channel MOSFET, the forms a two-chip low-dropout regulator capable of driving a wide range of output currents. The operates from an input of.v to.v. The low input voltage allows the to operate off of high power.8v rails to generate lower voltages such as.v. Features of the include enable input and currentlimit protection. As a µcap design, the is stable with ceramic output capacitors. The is packaged in the IttyBitty SOT--, and is offered in fixed and adjustable output voltages. Junction temperature range of the is from C to + C. Features Fast transient response Input voltage range: V IN.V to.v ±.% initial output tolerance Fixed.8V or adjustable output voltage down to.v Stable with ceramic output capacitor Capable up to A Excellent line and load regulation specifications Logic-controlled shutdown Programmable current limit Current-limit protection IttyBitty SOT-- package Available temperature range: C to + C Applications Ultra-high current, ultra-low dropout voltage regulator High-efficiency linear power supplies Low-voltage distributed power Fixed telecom Multimedia and PC power supplies Battery chargers Low-voltage DSP, microprocessor and microcontroller power supplies Typical Application V IN Q Q SUBP V OUT C U BM/YM EN GATE IN FB IS GND R C R C A ma GND Adjustable Output Voltage GND V IN =.V V OUT =.V C OUT = µf IttyBitty is a registered trademark of Micrel, Inc. Micrel Inc. 8 Fortune Drive San Jose, CA 9 USA tel + (8) 9-8 fax + (8) 7- June M9999-7

2 Ordering Information Standard Part Number Pb-Free Marking Voltage* Junction Temp. Range Package BM YM LZAA Adj. to + C SOT-- -.8BM -.8YM LZ8.8V. to + C SOT-- -.BM -.YM LZ.V to + C SOT-- Note: Other Voltage available. Contact Micrel for details. Pin Configuration ADJ EN GATE OUT EN GATE Pin Index LZAA Pin Index LZxx IN GND IS IN GND IS SOT-- (M) Adjustable Voltage Version SOT-- (M) Fixed Voltage Version Pin Description Pin Number Pin Name Pin Function IN Input Voltage. GND Ground. IS Current Sense: IS must be tied to VIN pin if the current limit feature is not used. GATE Gate drive of the external P-Channel MOSFET. EN Enable Input: Logic Level ON/OFF control. Logic high = ON; logic low = OFF. ADJ Adjustable Regulator Feedback Input: Connect to resistor voltage divider. OUT Output Voltage: Connect to drain of P-Channel MOSFET to regulate output to proper voltage. June M9999-7

3 Absolute Maximum Ratings () Supply Voltage (V IN )...+.V Enable Input Voltage (V EN )...+.V Power Dissipation (P D(max) )... Note Storage Temperature (T s )... C to + C Lead Temperature (soldering, sec.)... C EDS Rating ()... kv Operating Ratings () Supply voltage (V IN )... +.V to +.V Enable Input Voltage (V EN )... V to +.V Junction Temperature (T J )... C T J + C Package Thermal Resistance SOT-- (θ JA )... C/W Electrical Characteristics () T A = C with V IN = V OUT + V; V EN =.V, C IN = C OUT = µf, ceramic, I OUT = ma; bold values indicate C < T J < + C; unless otherwise specified, Note Parameter Condition Min Typ Max Units Output Voltage Accuracy At C + % Over temperature range + % Output Voltage Line Regulation V IN = V OUT +.V to.v %/V Output Voltage Load Regulation I L = ma to.a.. % Ground Pin Current () V EN.V ( OFF) µa V EN.V ( ON) ma Adjust Pin Bias Current µa Maximum V GS (PFET fully ON); V IN =.V. V (PFET fully ON); V IN =.V. V (PFET fully ON); V IN =.V. V Current-Limit Threshold V IN V IS mv Start-up Time V EN = V IN µs Enable Input Enable Input Threshold Regulator enabled. V Regulator shutdown. V Enable hysteresis mv Enable Pin Input Current Independent of state. na µa. Exceeding the absolute maximum rating may damage the device.. The device is not guaranteed to function outside its operating rating.. P D(max) = (T J(max) TA) θ JA, where θ JA depends upon the printed circuit layout, see Applications Information.. Devices are ESD sensitive. Handling precautions recommended. Human body model,.k in series with pf.. Specification for packaged product only.. I GND is the quiescent current. I IN = I GND + I OUT. June M9999-7

Typical Characteristics REFERENCE VOLTAGE (V)........ Reference Voltage vs. Input Voltage.

.9 V IN =.V.8.7....... - - 8 TEMPERATURE ( C) OUTPUT VOLTAGE (V) Output Voltage vs. Load.

Input Voltage I LOAD =ma........ INPUT VOLTAGE (V) QUIESCENT CURRENT (ma) Quiescent Current vs.

V - - 8 TEMPERATURE ( C) QUIESCENT CURRENT (ma) Quiescent Current vs. Load 9 8 7 V IN

Threshold vs. Input Voltage......... 7 INPUT VOLTAGE (V) Enable Threshold vs.

........ INPUT VOLTAGE (V) EN on EN off CURRENT LIMIT THRESHOLD (mv) SHUTDOWN CURRENT

4 Typical Characteristics REFERENCE VOLTAGE (V) Reference Voltage vs. Input Voltage INPUT VOLTAGE (V) REFERENCE VOLTAGE (V) Reference Voltage vs. Temperature..9 V IN =.V TEMPERATURE ( C) OUTPUT VOLTAGE (V) Output Voltage vs. Load..9 V IN =.V LOAD (A) QUIESCENT CURRENT (ma) Quiescent Current vs. Input Voltage I LOAD =ma INPUT VOLTAGE (V) QUIESCENT CURRENT (ma) Quiescent Current vs. Temperature V IN =.V TEMPERATURE ( C) QUIESCENT CURRENT (ma) Quiescent Current vs. Load V IN =.V..... LOAD (A) CURRENT LIMIT THRESHOLD (mv) ENABLE THRESHOLD (mv) 8 8 Current Limit Threshold vs. Input Voltage INPUT VOLTAGE (V) Enable Threshold vs. Input Voltage INPUT VOLTAGE (V) EN on EN off CURRENT LIMIT THRESHOLD (mv) SHUTDOWN CURRENT (µa) Current Limit Threshold vs. Temperature TEMPERATURE ( C) 8 8 Shutdown Current vs. Input Voltage - C C INPUT VOLTAGE (V) 8 C ENABLE THRESHOLD (mv) 8 7 Enable Threshold vs. Temperature EN on EN off TEMPERATURE ( C) June M9999-7

5 Functional Characteristics A ma V IN =.8V V OUT =.V C OUT = µf V IN =.V V OUT =.8V June M9999-7

6 Functional Diagram V IN R S V OUT I S GATE Buffer I SNS Amplifier S V OUT IN V REF V REF EN Enable GND Block Diagram Fixed Output Voltages V IN R S V OUT I S GATE R Buffer ADJ. I SNS Amplifier S IN V REF V REF R EN Enable Block Diagram Adjustable Output Voltages June M9999-7

7 Application Information The is a high performance voltage regulator controller. When used with an external P-Channel MOSFET and a tiny ceramic output capacitor, it forms a wide variety of simple, inexpensive ultra-low-dropout voltage regulators. Current Sense Resistor Selection A current sense resistor placed between the input and the current sense pin (IS) allows for programmability of the current limit. This resistor can simply be calculated by: mv R SENSE = IOUT Where I OUT is the maximum output current. For example, the current sense resistor for a.v IN to.8v OUT, A, linear regulator calculates as follows: mv R SENSE = A R SENSE = mω P-Channel MOSFET Selection The P-Channel MOSFET selected for use with the must satisfy the following requirements: Input voltage Gate threshold Load current Dropout voltage (input-to-output differential) Thermal performance To prevent damage to the P-Channel MOSFET, the maximum input voltage (V IN(max) ) must be less than its drain-source breakdown voltage (BV DS ). In addition, the minimum input voltage (V IN(min) ) must be greater than or equal to the gate threshold voltage (V GS ) of the P- Channel MOSFET. For a given output current and dropout requirement, the ON-resistance (R DS(ON) ) of the P-Channel MOSFET must also be determined. The minimum R DS(ON) of the P-Channel MOSFET is calculated as follows: R DS(ON) = ( V V ) IN(MIN) I OUT(MAX) OUT R SENSE Where I OUT(max) is the maximum output current and R SENSE is the current sense resistor. For example, the -.8BM is used with an external MOSFET to form a A LDO with an input of.v. Either a.v or.8v gate threshold MOSFET can be selected. The minimum R DS(ON) is calculated as: (.V.8V) R DS(ON) = A R DS(ON) = mω mω According to the above calculation, the minimum R DS(ON) is mω for a.v to.8v LDO with A of output current. For this design, the R DS(ON) for the FETs should maintain better than mω over the required temperature, current, and voltage conditions. Placing two or more P-Channel FETs in parallel can reduce the total R DS(ON) of the regulator. This also aids thermal dissipation by sharing the current and heat between the multiple FETs. Thermal Considerations Linear regulators are simple to use. The most complicated design parameters to consider are thermal characteristics. Since the offers no thermal protection, thermal design requires the following application-specific parameters: Maximum ambient temperature (T A ) Output current (I OUT ) Output voltage (V OUT ) Input voltage (V IN ) First, calculate the maximum power dissipation of the regulator: P D = (V IN V OUT ) I OUT Ground current can generally be ignored. The amount of power dissipated by ground current and input voltage is minimal. Minimum θ JA for the MOSFET can be calculated using the following formula: θ JA = ( T T ) J(MAX) P D A Where T J(max) is equal to the maximum die temperature of the P-Channel. θ JA = θ JC + θ CS + θ SA Example For the same regulator,.v IN to.8v OUT at A with an ambient temperature of C: P D = (.V.8V) A P D =.W Where V IN is the maximum V IN and I OUT is the maximum I OUT. The P-Channel MOSFET must be able to dissipate.w. The minimum θ JA to maintain a maximum T J of C (max.) T J according to a typical MOSFET data sheet is as follows: ( C C) θ JA =.W June 7 M9999-7

θ JA =.7 C/W The heatsink and MOSFET must have a combined thermal resistance to meet the above criteria. The typical thermal resistance from the junction to the case (θ JC ) of a TO- (D pack) is C/W.

8 θ JA =.7 C/W The heatsink and MOSFET must have a combined thermal resistance to meet the above criteria. The typical thermal resistance from the junction to the case (θ JC ) of a TO- (D pack) is C/W. Adding. C/W for case to sink thermal resistance (θ CS ), the heatsink must have a sink to ambient thermal resistance (θ SA ) of: θ SA = θ JA (θ JC + θ CS ) θ SA =.7 C/W ( C/W +. C/W) θ SA = 9. C/W According to the calculations, the heatsink must have a θ SA of 9. C/W or better. For a full discussion of heat sinking and thermal effects on voltage regulators, refer to the Regulator Thermals section of Micrel s Designing with Low-Dropout Voltage Regulators handbook. Short-Circuit Current Limit The above thermal design calculations apply to normal operation. In the case where the P-Channel MOSFET must survive extended periods of short-circuit current, another approach for thermal design must be considered. Due to the fact that the delivers constant current limiting, power dissipated by the MOSFET is equal to the input voltage multiplied by the maximum output current. Figure shows a simple, inexpensive circuit that allows the current limiting to be re-entrant. This reduces power dissipation in current limited conditions. As the output voltage begins to drop, the differential voltage across the input and output increases. This pulls the current sense voltage lower, reducing the amount of output current to maintain mv across the sense resistor. This reduction in output current equates to a reduction in power dissipation in the MOSFET. Figures and show a comparison of linear current limiting versus the reentrant current limiting scheme implemented in Figure. C µf R SENSE R VOUT. V IN R VIN Q,, SiDYx -.8BM/YM ISENSE VIN GATE ADJ Figure. Re-Entrant Current Limit.8 V OUT.A C 7µF OUTPUT VOLTAGE (V) Constant Current Limit Re-Entrant Current Limit Figure. Output Voltage Characteristics Re-Entrant Current Limit POWER DISSIPATION (W) Constant Current. Limiting.. Re-Entrant Current Limiting.... OUTPUT VOLTAGE (V) Figure. Power Dissipation vs. Output Voltage Enable/Shutdown The comes with an active-high enable pin that allows the regulator to be disabled. Forcing the enable pin low disables the regulator and sends it into a low offmode-current state. Forcing the enable pin high enables the output voltage. This part is CMOS and the enable pin cannot be left floating; a floating enable pin may cause an indeterminate state on the output. Output Capacitor The requires an output capacitor to maintain stability and improve transient response. Proper selection is important to ensure proper operation. The output capacitor selection is highly dependent upon the components and the application. With a very high gate charge (gate capacitance) MOSFET, the output requires a much larger valued ceramic capacitor for stability. As an alternative to a large valued ceramic capacitor, a smaller-valued tantalum capacitor can be used to provide stability. At higher load currents, lower R DS(ON) MOSFETs are used; these MOSFETs typically having much larger gate charge. If the application does not require ultra-low-dropout voltage, smaller values of ceramic capacitance may be used. June 8 M9999-7

9 Input Capacitor An input capacitor of.µf or greater is recommended when the device is more than inches away from the bulk AC supply capacitance or when the supply is a battery. Small, surface mount, ceramic capacitors can be used for bypassing the input to the regulator, further improving the integrity of the output voltage. Larger input capacitors may be required depending on the impedance of the source and the output load requirements. Adjustable Regulator Design The allows programming the output voltage anywhere between.v to V IN. Two resistors are used. See Figure. The resistor values are calculated by: V OUT R = R. Where V OUT is the desired output voltage. Layout Considerations Input and output capacitor placement should be as close as possible to the input and output, respectively. Trace resistance between the current sense and the MOSFET source should be minimized. Trace resistance will increase dropout voltage. This is more of a factor at higher output currents. Also, a minimum amount of distance between the gate pin, on the, and the P-Channel MOSFET gate is recommended. A long trace can create a small parasitic inductor. This, coupled to the gate capacitance of the MOSFET, can create a high frequency tank circuit. A small Ω resistor in series with the gate may be required to eliminate high-frequency noise. V IN R S IS IN EN -x.x GND GATE ADJ Si R R V OUT Figure. Adjustable Regulator Design C OUT = µf ceramic June 9 M9999-7

10 Designing with The following section details: Application examples of possible input/output configurations with related schematics designator. Schematics with Bill of Materials recommendation, dropout performance and maximum output current for each FET combination. Further advice on MOSFET selection..v IN to.v OUT Conversion I OUT C OUT MOSFET Package Schematic.A µf SiDY SO-8 C.A µf SiDY x SO-8 D.A µf SUBP- DPAK H.A µf SiDY x SO-8 E.A µf SiDY x SO-8 F.A µf SUBP- x DPAK I 7.A µf SUBP- x DPAK J.A µf SUBP- x DPAK K.V IN to.8v OUT Conversion I OUT C OUT MOSFET Package Schematic.A µf SiDY SO-8 C.A µf SiDY x SO-8 D.A µf SUBP- DPAK H.A µf SiDY x SO-8 E.A µf SiDY x SO-8 F.A µf SUBP- x DPAK I.7A µf SUBP- x DPAK J.A µf SUBP- x DPAK K.V IN to.v OUT Conversion I OUT C OUT MOSFET Package Schematic.A µf SiDY SO-8 C.A µf SiDY x SO-8 D.A µf SUBP- DPAK H.A µf SiDY x SO-8 E.A µf SiDY x SO-8 F.A µf SUBP- x DPAK I.A µf SUBP- x DPAK J.A µf SUBP- x DPAK K.V IN to.v OUT Conversion I OUT C OUT MOSFET Package Schematic.A µf SiDY SO-8 C.7A µf SiDY x SO-8 D.7A µf SUBP- DPAK H.A µf SiDY x SO-8 E.7A µf SiDY x SO-8 F.7A µf SUBP- x DPAK I.7A µf SUBP- x DPAK J.7A µf SUBP- x DPAK K.V IN to.8v OUT Conversion I OUT C OUT MOSFET Package Schematic.A µf SiDY SO-8 C.A µf SiDY x SO-8 D.A µf SUBP- DPAK H.A µf SiDY x SO-8 E.A µf SiDY x SO-8 F.A µf SUBP- x DPAK I 8.A µf SUBP- x DPAK J.A µf SUBP- x DPAK K.V IN to.v OUT Conversion I OUT C OUT MOSFET Package Schematic.A µf SiDY SO-8 C.A µf SiDY x SO-8 D.A µf SUBP- DPAK H.A µf SiDY x SO-8 E.A µf SiDY x SO-8 F.A µf SUBP- x DPAK I.A µf SUBP- x DPAK J 8.A µf SUBP- x DPAK K.V IN to.v OUT Conversion I OUT C OUT MOSFET Package Schematic.7A µf SiDY SO-8 C.A µf SiDY x SO-8 D.A µf SUBP- DPAK H.A µf SiDY x SO-8 E.A µf SiDY x SO-8 F.A µf SUBP- x DPAK I.A µf SUBP- x DPAK J.A µf SUBP- x DPAK K June M9999-7

11 .8V IN to.v OUT Conversion I OUT C OUT MOSFET Package Schematic.A µf SiDV TSOP- A.A µf SiDV x TSOP- B.A µf SiDY x SO-8 G 7.A () µf SUBP- x DPAK K Note:. For space constrained designs, a DPAK equivalent can be used in this application (SUDP-). This is due to R DS(ON) limitation NOT power dissipation..8v IN to.v OUT Conversion I OUT C OUT MOSFET Package Schematic.A µf SiDV TSOP- A.A µf SiDY SO-8 C.A µf SiDY x SO-8 D.A µf SUBP- DPAK H.A µf SiDY x SO-8 E.A µf SiDY x SO-8 F.A µf SUBP- x DPAK I 9.A 88µF SUBP- x DPAK J.A 88µF SUBP- x DPAK K June M9999-7

12 Schematic A Input/Output Combination Examples Input Output Maximum Current.8V.V A.8V.V A U BM/YM Application Circuit INPUT OUTPUT VOLTAGE (V) Max. Power Dissipation at C T A Dropout... SiDV SOA Bill of Materials Item Part Number Manufacturer Description Qty. C GRM X7R. Murata () µf,.v Ceramic MLCC, Size 8 C CXRRJM Murata µf,.v Ceramic MLCC, Size 8 R CRCW8 Vishay Dale () kω Resistor, Size 8 R CRCW897 Vishay Dale Output Voltage:.V; 9.7kΩ Resistor, Size 8 () CRCW8 Vishay Dale Output Voltage:.8V;.kΩ Resistor, Size 8 () CRCW8 Vishay Dale Output Voltage:.V;.kΩ Resistor, Size 8 () CRCW88 Vishay Dale Output Voltage:.V; 8kΩ Resistor, Size 8 () R CRCW89R9 F Vishay Dale 9.9Ω Resistor, Size 8 Q SiDV Vishay Siliconix () P-Channel MOSFET TSOP- U BM/YM Micrel, Inc. () Programmable Current Limit µcap LDO Regulator. Murata Tel: Vishay Dale Tel: --8. To calculate other output voltage values: R R = V OUT.. Vishay Siliconix Tel: --8. Micrel, Inc. Tel: June M9999-7

13 Schematic B Input/Output Combination Examples Input Output Maximum Current.8V.V A U BM/YM INPUT OUTPUT VOLTAGE (V) Max. Power Dissipation at C T A Dropout Application Circuit SiDV x SOA Bill of Materials Item Part Number Manufacturer Description Qty. C GRM X7R. Murata () µf,.v Ceramic MLCC, Size 8 CXRRJM TDK () µf,.v Ceramic MLCC, Size 8 C GRM- XR K. Murata µf,.v Ceramic MLCC, Size CXRRJM TDK µf, V Ceramic MLCC, Size R CRCW8 Vishay Dale () kω Resistor, Size 8 R CRCW897 Vishay Dale Output Voltage:.V; 9.7kΩ Resistor, Size 8 () CRCW8 Vishay Dale Output Voltage:.8V;.kΩ Resistor, Size 8 () CRCW8 Vishay Dale Output Voltage:.V;.kΩ Resistor, Size 8 () CRCW88 Vishay Dale Output Voltage:.V; 8kΩ Resistor, Size 8 () R CRCW89R9 F Vishay Dale 9.9Ω Resistor, Size 8 Q, Q SiDV Vishay Siliconix () P-Channel MOSFET TSOP- U BM/YM Micrel, Inc. () Programmable Current Limit µcap LDO Regulator. Murata Tel: TDK Tel: Vishay Dale Tel: --8. To calculate other output voltage values: R R = V OUT.. Vishay Siliconix Tel: --8. Micrel, Inc. Tel: June M9999-7

14 Schematic C Input/Output Combination Examples Input Output Maximum Current.V.V A.V.8V.A.V.V.A.V.V.A.V.8V.A.V.V A.V.V.7A.8V.V.A U BM/YM Application Circuit INPUT OUTPUT VOLTAGE (V) Max. Power Dissipation at C T A Dropout.. SiDY SOA Bill of Materials Item Part Number Manufacturer Description Qty. C GRM X7R. Murata () µf,.v Ceramic MLCC, Size 8 C CXRRJM TDK () µf,.v Ceramic MLCC, Size 8 R CRCW8 Vishay Dale () kω Resistor, Size 8 R CRCW897 Vishay Dale Output Voltage:.V; 9.7kΩ Resistor, Size 8 () CRCW8 Vishay Dale Output Voltage:.8V;.kΩ Resistor, Size 8 () CRCW8 Vishay Dale Output Voltage:.V;.kΩ Resistor, Size 8 () CRCW88 Vishay Dale Output Voltage:.V; 8kΩ Resistor, Size 8 () R CRCW89R9 F Vishay Dale 9.9Ω Resistor, Size 8 Q SiDY Vishay Siliconix () P-Channel MOSFET SO-8 U BM/YM Micrel, Inc. () Programmable Current Limit µcap LDO Regulator. Murata Tel: TDK Tel: Vishay Dale Tel: --8. To calculate other output voltage values: R R = V OUT.. Vishay Siliconix Tel: --8. Micrel, Inc. Tel: June M9999-7

15 Schematic D Input/Output Combination Examples Input Output Maximum Current.V.V.A.V.8V.A.V.V A.V.V.7A.V.8V.A.V.V A.V.V.A.8V.V A.8V.V A U BM/YM Application Circuit INPUT OUTPUT VOLTAGE (V) Max. Power Dissipation at C T A Dropout SiDY x SOA Bill of Materials Item Part Number Manufacturer Description Qty. C GRM X7R. Murata () µf,.v Ceramic MLCC, Size 8 CXRRJM TDK () µf,.v Ceramic MLCC, Size 8 C GRM- XR K. Murata µf,.v Ceramic MLCC, Size CXRAM TDK µf, V Ceramic MLCC, Size R CRCW8 Vishay Dale () kω Resistor, Size 8 R CRCW897 Vishay Dale Output Voltage:.V; 9.7kΩ Resistor, Size 8 () CRCW8 Vishay Dale Output Voltage:.8V;.kΩ Resistor, Size 8 () CRCW8 Vishay Dale Output Voltage:.V;.kΩ Resistor, Size 8 () CRCW88 Vishay Dale Output Voltage:.V; 8kΩ Resistor, Size 8 () R CRCW89R9 F Vishay Dale 9.9Ω Resistor, Size 8 Q, Q SiDY Vishay Siliconix () P-Channel MOSFET SO-8 U BM/YM Micrel, Inc. () Programmable Current Limit µcap LDO Regulator. Murata Tel: TDK Tel: Vishay Dale Tel: --8. To calculate other output voltage values: R R = V OUT.. Vishay Siliconix Tel: --8. Micrel, Inc. Tel: June M9999-7

16 Schematic E Input/Output Combination Examples Input Output Maximum Current.V.V.A.V.8V A.V.V.A.V.V.A.V.8V A.V.V A.V.V A.8V.V.A U BM/YM INPUT OUTPUT VOLTAGE (V) Max. Power Dissipation at C T A Dropout Application Circuit SiDY x SOA Bill of Materials Item Part Number Manufacturer Description Qty. C GRM X7R. Murata () µf,.v Ceramic MLCC, Size 8 CXRRJM TDK () µf,.v Ceramic MLCC, Size 8 C GRM- XR K. Murata µf,.v Ceramic MLCC, Size CXRAM TDK µf, V Ceramic MLCC, Size R CRCW8 Vishay Dale () kω Resistor, Size 8 R CRCW897 Vishay Dale Output Voltage:.V; 9.7kΩ Resistor, Size 8 () CRCW8 Vishay Dale Output Voltage:.8V;.kΩ Resistor, Size 8 () CRCW8 Vishay Dale Output Voltage:.V;.kΩ Resistor, Size 8 () CRCW88 Vishay Dale Output Voltage:.V; 8kΩ Resistor, Size 8 () R CRCW89R9 F Vishay Dale 9.9Ω Resistor, Size 8 Q,Q, SiDY Vishay Siliconix () P-Channel MOSFET SO-8 Q U BM/YM Micrel, Inc. () Programmable Current Limit µcap LDO Regulator. Murata Tel: TDK Tel: Vishay Dale Tel: --8. To calculate other output voltage values: R R = V OUT.. Vishay Siliconix Tel: --8. Micrel, Inc. Tel: June M9999-7

17 Schematic F Input/Output Combination Examples Input Output Maximum Current.V.V A.V.8V.A.V.V A.V.V.7A.V.8V.A.V.V A.V.V A.8V.V.A U BM/YM INPUT OUTPUT VOLTAGE (V) Max. Power Dissipation at C T A Dropout 8 Application Circuit SiDY x SOA Bill of Materials Item Part Number Manufacturer Description Qty. C GRM X7R. Murata () µf,.v Ceramic MLCC, Size 8 CXRRJM TDK () µf,.v Ceramic MLCC, Size 8 C GRM- XR K. Murata µf,.v Ceramic MLCC, Size CXRAM TDK µf, V Ceramic MLCC, Size R CRCW8 Vishay Dale () kω Resistor, Size 8 R CRCW897 Vishay Dale Output Voltage:.V; 9.7kΩ Resistor, Size 8() CRCW8 Vishay Dale Output Voltage:.8V;.kΩ Resistor, Size 8() CRCW8 Vishay Dale Output Voltage:.V;.kΩ Resistor, Size 8() CRCW88 Vishay Dale Output Voltage:.V; 8kΩ Resistor, Size 8() R CRCW89R9 F Vishay Dale 9.9Ω Resistor, Size 8 Q,Q, SiDY Vishay Siliconix () P-Channel MOSFET SO-8 Q,Q U BM/YM Micrel, Inc. () Programmable Current Limit µcap LDO Regulator. Murata Tel: TDK Tel: Vishay Dale Tel: --8. To calculate other output voltage values: R R = V OUT.. Vishay Siliconix Tel: --8. Micrel, Inc. Tel: June 7 M9999-7

18 Schematic G Input/Output Combination Examples Input Output Maximum Current.8V.V A U BM/YM INPUT OUTPUT VOLTAGE (V) Max. Power Dissipation at C T A Dropout Application Circuit SiDY x SOA Bill of Materials Item Part Number Manufacturer Description Qty. C GRM X7R. Murata () µf,.v Ceramic MLCC, Size 8 CXRRJM TDK () µf,.v Ceramic MLCC, Size 8 C,C GRM ERJ7K Murata 7µF,.V Ceramic MLCC, Size 8 C,C,C CXRJ7M TDK 7µF,.V Ceramic MLCC, Size 8 R CRCW8 Vishay Dale () kω Resistor, Size 8 R CRCW897 Vishay Dale Output Voltage:.V; 9.7kΩ Resistor, Size 8 () CRCW8 Vishay Dale Output Voltage:.8V;.kΩ Resistor, Size 8 () CRCW8 Vishay Dale Output Voltage:.V;.kΩ Resistor, Size 8 () CRCW88 Vishay Dale Output Voltage:.V; 8kΩ Resistor, Size 8 () R CRCW89R9 F Vishay Dale 9.9Ω Resistor, Size 8 Q,Q SiDY Vishay Siliconix () P-Channel MOSFET SO-8 U BM/YM Micrel, Inc. () Programmable Current Limit µcap LDO Regulator. Murata Tel: TDK Tel: Vishay Dale Tel: --8. To calculate other output voltage values: R R = V OUT.. Vishay Siliconix Tel: --8. Micrel, Inc. Tel: June 8 M9999-7

19 Schematic H Input/Output Combination Examples Input Output Maximum Current.V.V.A.V.8V.A.V.V A.V.V.7A.V.8V.A.V.V A.V.V.A.8V.V A U BM/YM Application Circuit INPUT OUTPUT VOLTAGE (V) Max. Power Dissipation at C T A Dropout.... SUBP- SOA Bill of Materials Item Part Number Manufacturer Description Qty. C GRM X7R. Murata () µf,.v Ceramic MLCC, Size 8 C CXRRJM TDK () µf,.v Ceramic MLCC, Size 8 R CRCW8 Vishay Dale () kω Resistor, Size 8 R CRCW897 Vishay Dale Output Voltage:.V; 9.7KΩ Resistor, Size 8 () CRCW8 Vishay Dale Output Voltage:.8V;.KΩ Resistor, Size 8 () CRCW8 Vishay Dale Output Voltage:.V;.kΩ Resistor, Size 8 () CRCW88 Vishay Dale Output Voltage:.V; 8kΩ Resistor, Size 8 () R CRCW89R9 F Vishay Dale 9.9Ω Resistor, Size 8 Q SUBP- Vishay Siliconix () P-Channel MOSFET TO- U BM/YM Micrel, Inc. () Programmable Current Limit µcap LDO Regulator. Murata Tel: TDK Tel: Vishay Dale Tel: --8. To calculate other output voltage values: R R = V OUT.. Vishay Siliconix Tel: --8. Micrel, Inc. Tel: June 9 M9999-7

20 Schematic I Input/Output Combination Examples Input Output Maximum Current.V.V A.V.8V.A.V.V A.V.V.7A.V.8V.A.V.V A.V.V A.8V.V.A U BM/YM INPUT OUTPUT VOLTAGE (V) Max. Power Dissipation at C T A Dropout 7 8 Application Circuit SUBP- x SOA Bill of Materials Item Part Number Manufacturer Description Qty. C GRM X7R. Murata () µf,.v Ceramic MLCC, Size 8 CXRRJM TDK () µf,.v Ceramic MLCC, Size 8 C GRM- XR K. Murata µf,.v Ceramic MLCC, Size CXRAM TDK µf, V Ceramic MLCC, Size R CRCW8 Vishay Dale () kω Resistor, Size 8 R CRCW897 Vishay Dale Output Voltage:.V; 9.7KΩ Resistor, Size 8 () CRCW8 Vishay Dale Output Voltage:.8V;.KΩ Resistor, Size 8 () CRCW8 Vishay Dale Output Voltage:.V;.kΩ Resistor, Size 8 () CRCW88 Vishay Dale Output Voltage:.V; 8kΩ Resistor, Size 8 () R CRCW89R9 F Vishay Dale 9.9Ω Resistor, Size 8 Q,Q SUBP- Vishay Siliconix () P-Channel MOSFET TO- U BM/YM Micrel, Inc. () Programmable Current Limit µcap LDO Regulator. Murata Tel: TDK Tel: Vishay Dale Tel: --8. To calculate other output voltage values: R R = V OUT.. Vishay Siliconix Tel: --8. Micrel, Inc. Tel: June M9999-7

21 Schematic J Input/Output Combination Examples Input Output Maximum Current.V.V 7.A.V.8V.7A.V.V A.V.V.7A.V.8V 8A.V.V A.V.V.A.8V.V 9.A U BM/YM INPUT OUTPUT VOLTAGE (V) Max. Power Dissipation at C T A Dropout 8 Application Circuit SUBP- x SOA Bill of Materials Item Part Number Manufacturer Description Qty. C GRM X7R. Murata () µf,.v Ceramic MLCC, Size 8 CXRRJM TDK () µf,.v Ceramic MLCC, Size 8 C, C GRM- XR K. Murata µf,.v Ceramic MLCC, Size CXRAM TDK µf, V Ceramic MLCC, Size R CRCW8 Vishay Dale () kω Resistor, Size 8 R CRCW897 Vishay Dale Output Voltage:.V; 9.7kΩ Resistor, Size 8 () CRCW8 Vishay Dale Output Voltage:.8V;.kΩ Resistor, Size 8 () CRCW8 Vishay Dale Output Voltage:.V;.kΩ Resistor, Size 8 () CRCW88 Vishay Dale Output Voltage:.V; 8kΩ Resistor, Size 8 () R CRCW89R9 F Vishay Dale 9.9Ω Resistor, Size 8 Q,Q SUBP- Vishay Siliconix () P-Channel MOSFET TO- Q U BM/YM Micrel, Inc. () Programmable Current Limit µcap LDO Regulator. Murata Tel: TDK Tel: Vishay Dale Tel: --8. To calculate other output voltage values: R R = V OUT.. Vishay Siliconix Tel: --8. Micrel, Inc. Tel: June M9999-7

22 Schematic K Input/Output Combination Examples Input Output Maximum Current.V.V A.V.8V A.V.V.A.V.V.7A.V.8V A.V.V 8A.V.V A.8V.V 7A.8V.V A U BM/YM INPUT OUTPUT VOLTAGE (V) Max. Power Dissipation at C T A Dropout. 7.. Application Circuit SUBP- x SOA Bill of Materials Item Part Number Manufacturer Description Qty. C GRM X7R. Murata () µf,.v Ceramic MLCC, Size 8 CXRRJM TDK () µf,.v Ceramic MLCC, Size 8 C, C GRM- XR K. Murata µf,.v Ceramic MLCC, Size CXRAM TDK µf, V Ceramic MLCC, Size R CRCW8 Vishay Dale () kω Resistor, Size 8 R CRCW897 Vishay Dale Output Voltage:.V; 9.7kΩ Resistor, Size 8 () CRCW8 Vishay Dale Output Voltage:.8V;.kΩ Resistor, Size 8 () CRCW8 Vishay Dale Output Voltage:.V;.kΩ Resistor, Size 8 () CRCW88 Vishay Dale Output Voltage:.V; 8kΩ Resistor, Size 8 () R CRCW89R9 F Vishay Dale 9.9Ω Resistor, Size 8 Q, Q SUBP- Vishay Siliconix () P-Channel MOSFET TO- Q, Q U BM/YM Micrel, Inc. () Programmable Current Limit µcap LDO Regulator. Murata Tel: TDK Tel: Vishay Dale Tel: --8. To calculate other output voltage values: R R = V OUT.. Vishay Siliconix Tel: --8. Micrel, Inc. Tel: June M9999-7

23 Package Information -Pin SOT- (M) MICREL, INC. 8 FORTUNE DRIVE SAN JOSE, CA 9 USA TEL + (8) 9-8 FAX + (8) 7- WEB The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. Micrel, Incorporated. June M9999-7

Features. Applications. Regulator with Adjustable Output

Features. Applications. Regulator with Adjustable Output Low-Quiescent Current 150mA LDO Regulator General Description The is a low-quiescent current, μcap lowdropout regulator. With a maximum operating input voltage of 30V and quiescent current of 20μA, it