SGM mA, Low Power, Low Dropout 3 -Terminal, Linear Regulators
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1 3 -Terminal, Linear Regulators GENERAL DESCRIPTION The series low-power, low-noise, low-dropout, CMOS linear voltage regulators operate from a 2.5V to 5.5V input voltage. They are the perfect choice for low voltage, low power applications. A low ground current makes this part attractive for battery operated power systems. The series also offer ultra low dropout voltage to prolong battery life in portable electronics. The features include foldback current limit and thermal shut-down protection. operates over an ambient temperature range of -4 C to +125 C. It comes in Green SOT-23-3 (only 1.8V output voltage), SOT-89-3 and SOT packages. APPLICATIONS Cellular Telephones Digital Cameras MP3, MP4 USB 2. Modems PC Cameras Hand-Held Instruments Electronic Dictionarys Portable/Battery-Powered Equipment TYPICAL OPERATION CIRCUIT INPUT C IN 1µF IN GND OUT OUTPUT C OUT 1µF FEATURES Low Output Noise Low Dropout Voltage Maximum Output Current: 3mA Thermal-Overload Protection Output Current Limit Available in Multiple Output Voltage Versions Output Voltage: Available in Fixed Outputs 1.2V, 1.5V, 1.8V, 2.5V, 2.7V, 2.8V, 2.9V, 3.V and 3.3V PIN CONFIGURATIONS (TOP VIEW) GND OUT 1 3 IN 2 SOT-23-3 GND OUT GND IN SOT-89-3 PIN DESCRIPTION OUT GND OUT IN SOT-223-3(R-Type) IN GND IN OUT SOT-89-3(L-Type) NAME FUNCTION IN Regulator Input. Supply voltage can range from 2.5V to 5.5V. GND Ground. OUT Regulator Output. REV. C. 3
2 PACKAGE/ORDERING INFORMATION MODEL V OUT (V) V V V V V V V V V PIN- PACKAGE ORDERING NUMBER PACKAGE MARKING PACKAGE OPTION SOT XK3/TR -1.2XK3 Tape and Reel, 1 SOT-89-3(L-Type) -1.2XK3L/TR -1.2XK3L Tape and Reel, 1 SOT XK3/TR -1.8XK3 Tape and Reel, 1 SOT-89-3(L-Type) -1.5XK3L/TR -1.8XK3L Tape and Reel, 1 SOT XN3/TR XD18 Tape and Reel, 3 SOT XK3/TR -1.8XK3 Tape and Reel, 1 SOT-89-3(L-Type) -1.8XK3L/TR -1.8XK3L Tape and Reel, 1 SOT-223-3(R-Type) -1.8XKC3R/TR -1.8XKC3R Tape and Reel, 25 SOT XK3/TR -2.5XK3 Tape and Reel, 1 SOT-89-3(L-Type) -2.5XK3L/TR -2.5XK3L Tape and Reel, 1 SOT XK3/TR -2.7XK3 Tape and Reel, 1 SOT-89-3(L-Type) -2.7XK3L/TR -2.7XK3L Tape and Reel, 1 SOT XK3/TR -2.8XK3 Tape and Reel, 1 SOT-89-3(L-Type) -2.8XK3L/TR -2.8XK3L Tape and Reel, 1 SOT XK3/TR -2.9XK3 Tape and Reel, 1 SOT-89-3(L-Type) -2.9XK3L/TR -2.9XK3L Tape and Reel, 1 SOT XK3/TR -3.XK3 Tape and Reel, 1 SOT-89-3(L-Type) -3.XK3L/TR -3.XK3L Tape and Reel, 1 SOT XK3/TR -3.3XK3 Tape and Reel, 1 SOT-89-3(L-Type) -3.3XK3L/TR -3.3XK3L Tape and Reel, 1 SOT-223-3(R-Type) -3.3XKC3R/TR -3.3XKC3R Tape and Reel, 25 2
3 ABSOLUTE MAXIMUM RATINGS IN to GND...-.3V to 6V Output Short-Circuit Duration...Infinite OUT to GND...-.3V to (V IN +.3V) Power Dissipation, P T A = 25 SOT W SOT W Package Thermal Resistance SOT-23-3, θ JA /W SOT-89-3, θ JA /W Operating Temperature Range...-4 to +125 Junction Temperature...15 Storage Temperature to +15 Lead Temperature (soldering, 1s)...26 ESD Susceptibility HBM...4V MM...4V NOTE: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. CAUTION This integrated circuit can be damaged by ESD if you don t pay attention to ESD protection. SGMICRO recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. SGMICRO reserves the right to make any change in circuit design, specification or other related things if necessary without notice at any time. Please contact SGMICRO sales office to get the last datasheet. 3
4 ELECTRICAL CHARACTERISTICS (V IN = V OUT (NOMINAL) +.5V or 2.5V whichever is greater, T A =25 C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Voltage V IN V Output Voltage Accuracy % Maximum Output Current 3 ma Current Limit I LIM 31 5 ma Ground Pin Current I Q No load I OUT = 3mA 2 µa I OUT = 1mA 1 Dropout Voltage (1) I OUT = 3mA mv Line Regulation Load Regulation Power Supply Rejection Rate THERMAL PROTECTION Thermal Shutdown Temperature Thermal Shutdown Hysteresis V LNR V LDR PSRR V IN = 2.5V or (V OUT +.5V) to 5.5V, I OUT = 1mA I OUT =.1mA to 3mA, C OUT = 1µF, V OUT > 2V I OUT =.1mA to 3mA, C OUT = 1µF, V OUT 2V.3.6 %/V %/ma I LOAD = 5mA, C OUT = 1µF f = 1Hz 69 db V IN = V OUT +1V f = 1kHz 52 db T SHDN 15 T SHDN 1 NOTE: 1. The dropout voltage is defined as V IN - V OUT, when V OUT is 1mV below the value of V OUT for V IN = V OUT +.5V. (Only applicable for V OUT = +2.5V to +5.V.) 4
5 TYPICAL OPERATING CHARACTERISTICS V IN = V OUT (NOMINAL) +.5V or 2.5V (whichever is greater), C IN = 1µF, C OUT = 1µF, T A = +25, unless otherwise noted. 1.9 Output Voltage vs. Load Current 2.9 Output Voltage vs. Load Current Output Voltage (V) V OUT = 1.8V Load Current (ma) Output Voltage (V) Load Current (ma) Ground Pin Current (µa) Ground Pin Current vs. Load Current V OUT = 1.8V Load Current (ma) Ground Pin Current (µa) Ground Pin Current vs. Input Voltage 14 V 12 OUT = 1.8V Input Voltage (V) Ground Pin Current (µa) Ground Pin Current vs. Input Voltage 14 V 12 OUT = 2.8V Input Voltage (V) Output Voltage (V) No Load Output Voltage vs. Input Voltage V OUT = 1.8V Input Voltage (V) 5
6 TYPICAL OPERATING CHARACTERISTICS V IN = V OUT (NOMINAL) +.5V or 2.5V (whichever is greater), C IN = 1µF, C OUT = 1µF, T A = +25, unless otherwise noted. PSRR (db) Power-Supply Rejection Ratio vs. Frequency I LOAD = 5mA V IN = V OUT + 1V C OUT = 1µF C OUT = 1µF Frequency (khz) Current Limit (ma) Current Limit vs. Temperature V OUT = 1.8V Temperature ( ) 6
7 TYPICAL OPERATING CHARACTERISTICS V IN = V OUT (NOMINAL) +.5V or 2.5V (whichever is greater), C IN = 1µF, C OUT = 1µF, T A = +25, unless otherwise noted..2 Output Voltage Accuracy vs. Temperature.2 Output Voltage Accuracy vs. Temperature Output Voltage Accuracy (%) V OUT = 1.8V Output Voltage Accuracy (%) Temperature ( ) Temperature ( ) Ground Pin Current (µa) Ground Pin Current vs. Temperature No Load V OUT = 1.8V Temperature ( ) Dropout Voltage (mv) Dropout Voltage vs. Load Current T A =-4 T A = +85 T A = Load Current (ma) 7
8 APPLICATION NOTE When LDO is used in handheld products, attention must be paid to voltage spikes which could damage. In such applications, voltage spikes will be generated at charger interface and V BUS pin of USB interface when charger adapters and USB equipments are hot-plugged. Besides this, handheld products will be tested on the production line without battery. Test engineer will apply power from the connector pin which connects with positive pole of the battery. When external power supply is turned on suddenly, the voltage spikes will be generated at the battery connector. The voltage spikes will be very high, and it always exceeds the absolute maximum input voltage (6.V) of LDO. In order to get robust design, design engineer needs to clear up this voltage spike. Zener diode is a cheap and effective solution to eliminate such voltage spike. For example, BZM55B5V6 is a 5.6V small package Zener diode which can be used to remove voltage spikes in cell phone designs. The schematic is shown below. Vcc Input BZM55B5V6 1µF C 1 IN GND V OUT C 2 4.7µF V OUT 8
9 PACKAGE OUTLINE DIMENSIONS SOT-23-3 D b θ.2 L E1 E e1 e c A A1 A2 In Millimeters In Inches Symbol Min Max Min Max A A A b c D E E e.95 BSC.37 BSC e1 1.9 BSC.75 BSC L θ 8 8 9
10 PACKAGE OUTLINE DIMENSIONS SOT-89-3/SOT-89-3(L-Type) D D1 A E1 E b1 L e e1 b c In Millimeters In Inches Symbol Min Max Min Max A b b c D D REF.61 REF E E e 1.5 TYP.6 TYP e1 3. TYP.118 TYP L
11 PACKAGE OUTLINE DIMENSIONS SOT-223-3(R-type) D D1 θ L1.25 E1 E b L e c e1 A A1 A2 Symbol In Millimeters In Inches Min Max Min Max A A A b c D D E E e 2.3 TYP.91 TYP e L 1.5 REF.59 REF L θ
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