Low DropOut Linear Voltage regulators (LDOs)

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1 START Low DropOut Linear Voltage regulators (LDOs) July 2013

2 ST Low DropOut Linear voltage regulators Portfolio Key features drivers Complete range of low power and high performances LDOs Enlarging portfolio with cost-effective LDOs for volumes applications Wide offer of package solutions, from through-hole to the smallest Chip Scale Package Main benefits Key features Outstanding power efficiency figures State-of-the art key merit parameters Minimized PCB area occupation

3 What is an LDO? Where can you find it? What is an LDO? Linear Regulation is a cost effective mean to deliver a stable and regulated output voltage, with design simplicity and few external components. Linear regulators are the basic building block of almost every power supply. The LDO is a Linear voltage regulator which operates with a very low input-output voltage differential (dropout voltage), offering improved efficiency. In those applications where the Output current is less than or equal to a few amps and the Output voltage (V OUT ) is close to the input one (V IN ), the LDOs provide the best cost/performance tradeoff. You can find ST s LDOs in: and

4 What is an LDO? Where can you find it? Here!

5 Basic parameters: The waterfall analogy 5 How to choose an LDO? In an LDO the needed voltage gap between the input and the output (Dropout) is minimized, to the good of the System Efficiency. The Output current is almost the same of the Input one, minus a small amount needed to bias the LDO internal circuits (Quiescent current) SOURCE Input Voltage Input current Quiescent current Output Voltage Output current LOAD DROPOUT VOLTAGE Merit parameters Apart from the minimum dropout voltage and the quiescent current that are directly related with efficiency and power consumption, there are a few other merit parameters that have to be evaluated when designing with a LDO: Static parameters: Line, Load and temperature regulation Dynamic parameters: PSRR, NOISE, transient response Package dimension and thermal dissipation PSRR (or SVR): indicates how well an LDO rejects the ripple coming from the input at various frequencies. It is specified in db (the higher,the better) NOISE: is the level of noise generated internally by the LDO circuitry (the lower,the better). It is generally specified as integral noise over a frequency band.

6 Selecting an LDO: LDOs Ultra Low dropout Low quiescent current Low noise/high PSRR Miniature ST offers a complete portfolio of high performance LDOs, with state-of-the-art figures on the key merit parameters

7 Ultra Low DropOut: Key Features Low voltage (5.5V), Low current (<300mA) 7 Ultra low dropout (down to 50mV) Very low quiescent current (down to 20µA) High PSRR and Low Noise Fast transient response Wide range of miniaturized packages Main benefits Higher efficiency, lower power consumption Minimized PCB area occupation Easy design and implementation Excellent dynamic performances Applications This family of LDOs is designed for the hand-held world: Cell Phones and Tablets MP3 players and Games DSC SOT323-5L (SC70) SOT23-5L SC70 SOT23 CSP DFN 3x3 DFN6 1.2x1.3

8 Output Current Ultra low DropOut: Low voltage (5.5V), Low current (<300mA) 8 300mA LD39030 Drop: typ 200mV LDK130 Drop: typ 200mV 200mA LDK120 Drop: typ 150mV 150mA LD3985 Drop: typ 60mV LDCL015 Drop: typ 70mV CAPLESS LD39015/LD39115 Drop: typ 80mV LDCL mA LDO NO EXTERNAL CAPs NEEDED Higher efficiency, lower power dissipation Fast transient response Low quiescent current Main benefits Good dynamic performances (PSRR and Noise) SOT23-5L, SC70, DFN1.2x1.3 and CSP packages Applications Low power µc supply (STM32, etc) Cell Phones and Cordless Game consoles and accessories Battery powered equipments

9 Output Current 3A LD39300 Drop: typ 200mV LD49300 Drop: typ 220mV Ultra Low DropOut: Low voltage (5.5V), Medium current (>300mA) 9 2A 1.5A LD39200 Drop: typ 130mV LOW VIN, HIGH PSRR LD39150 Drop: typ 200mV 1A 500mA LD39100 Drop: typ 200mV LD39050 Drop: typ 200mV LDF Drop: typ 200mV 16V VIN LDFM Drop: typ 150mV 16V VIN LD39080 Drop: typ 150mV Main benefits Higher efficiency, lower power dissipation Fast transient response Low quiescent current Good dynamic performances (PSRR and Noise) DFN 3x3 and 4x4, DPAK and PPAK packages Applications DSP and FPGA power supply (STM32, etc) TV and STB Computer and Data storage Game consoles and accessories Telecom infrastructure

10 Ultra Low DropOut: LD A high performance LDO 10 Main benefits and Applications Very low startup voltage: from 1.25 to 6 V Very low output voltage: from 0.5V Guaranteed output current: 2A Ultra low drop: 130 mv typ. At 2A High PSRR: 70 1kHz, 40 1MHz Very low noise: 45µV RMS /V OUT Low quiescent current: 100 µa no load Enable and Power Good functions Reverse current protection Packages: DFN6 3x3 and DFN8 4x4 This high performance, medium power LDO is designed for demanding applications. It offers a best-in-class dropout performance without the need of additional biasing voltage. It is designed to provide the maximum efficiency in those environment where DC-DC switching regulation is not allowed. Typical applications are Digital IC Power Supply Telecom infrastructures Consumer and Industrial Equipments POL FPGA, DSP, ASIC dedicated Power Supply

11 Ultra low quiescent current (Iq) (down to 1.4µA) Very low dropout Key Features Wide range of miniaturized packages Output current from 50 to 150mA Extended input voltage range (up to 24V on ST715) Main benefits Maximize battery life Reduce standby power consumption Minimized PCB area occupation Easy design and implementation Low quiescent current LDOs: the Battery s Ally 11 Applications This family of LDOs is designed for those applications where power consumption is at a premium: Medical/Health care equipments Smoke detectors and alarms Real-time clock backup power Electronic sensors Portable Consumer

12 Output current [ma] Device Input voltage [V] STLQ to 12 ST to 24 STLQ to 5.5 LD to 5.5 NEW! Quiescent current [µa] Low quiescent current LDOs: the Battery s Ally 12 Key Benefits Packages Maximize battery life Reduce standby power consumption Wide VIN range offer, for maximum Flexibility LD39130: Automatic Green Mode operation STLQ50: SC70 (2x2 mm 2 ) STLQ015: SOT666 (1.6x1.6 mm 2 ) ST715: SOT23-5L (2x2 mm 2 ) & DFN8 (3x3 mm 2 ) LD39130: CSP4 bumps (0.69x0.69mm 2 ) & DFN6-1.2x1.3 mm 2

13 Low quiescent current LDOs: the Battery s Ally Input voltage: from 1.4 to 5.5 V Guaranteed output current: 300 ma Automatic green mode for low consumption at light loads: 1 μa typ in low power mode 55 μa 300 ma load 0.1 μa typ in off mode High PSRR: 1kHz, 10kHz Very low dropout voltage: 300 mv 300 ma Internal soft start Packages: CSP 4 bumps 0.69 mm x 0.69 mm Input Voltage from 1.5V to 5.5V Guaranteed output current: 150 ma Ultra Low and constant quiescent current: 1 μa (typ) at no load 1.4 μa (typ) at 150 ma load 1 na (typ) in OFF mode Logic controlled enable pin Internal Current and Thermal Limit Compatible with ceramic capacitor Package: SOT666-6leads 1.6 mm x 1.6 mm DFN 6 leads mm x 1.3 mm

14 Low noise & High PSRR LDOs: Key Features Make your DC more silent 14 Ultra low noise (down to 6.3µV RMS ) Very High PSRR (up to 92dB) Fast transient response Low quiescent current (20µA) Wide range of miniaturized packages Main benefits Excellent output signal quality Minimized PCB area occupation Easy design and implementation Low current consumption Applications This family of LDOs is designed for noise sensitive applications: RF modules, LNA, IF and VCO Signal conditioning, ADC Instrumentation, Medical equipments DC-DC low noise post-regulation Mobile phones and tablets

15 Low noise & High PSRR LDOs: Make your DC more silent 15 Input voltage: from 2.1 to 5.5 V Guaranteed output current: 150 ma Ultra low noise: 6.3 μv RMS from 10 Hz to 100 khz Very high PSRR: 92 db up to 10kHz Low quiescent current: 17 µa no load Logic controlled enable pin Very low dropout voltage: 90 mv 150 ma Packages: ULTRA low-noise Architecture Main benefits Thanks to the ultra low noise design, together with a very high PSRR figure, the device provides best-inclass voltage regulation. It is perfect as a post-regulator for noise-sensitive application, as well as a simple linear power supply for low noise-battery powered devices.

16 Low noise & High PSRR LDOs: Make your DC more silent 16 Low noise & High PSRR LDOs: Input voltage: from 2.3 to 5.5 V Guaranteed output current: 150 ma Very low noise: 20 μv RMS /V OUT from 10 Hz to 100 khz Very high PSRR: 76 db up to 10kHz Low quiescent current: 31 µa no load Logic controlled enable pin Very low dropout voltage: 150 mv 150 ma SOT23-5L SOT23-5L

17 Miniature LDOs: Key Features High performances are tiny 17 DFN, CSP, SC-70 and SOT666 miniaturized packages as small as 0.69x0.69mm 2 Very low dropout (down to 50mV) Very low quiescent current (down to 20µA) High PSRR and Low Noise Main benefits Minimized PCB area occupation Higher efficiency, lower power consumption Easy design and implementation Excellent dynamic performances Applications This family of LDOs is designed for those application where space is at a premium: Smartphones and tablets Sport accessories Medical equipments, hearing aids Bluetooth and remotes Electronic gadgets

18 Miniature LDOs: High performances are tiny 18 All the best performances of an ST s LDO fit into the smallest packages available. ST s miniature LDOs can be much smaller than a rice seed. The ultra-small, high performance LDOs are particularly suitable for the latest generation of portable devices. LD39115J PCB space occupation example CSP x 0.69 CSP4 0.8 x 0.8 DFN4 1x1 CSP4 1.1 x 1.1 DFN6 1.2 x 1.3 SOT x1.6 SC70 2x2 DFN6 2x2 LD x1 mm 2 200mA LDO LD39130SJ- 300mA,green mode LD39115J/LD39030SJ 150 and 300mA, high PSRR LD mA, HIGH PSRR LD39015J 150mA, soft start LDK /300mA LD39130SPUR 300mA green mode STLQ mA, Ultra low Iq LD mA, Higr PSRR LDLN mA, Ultra low noise, Higr PSRR NEW!

19 Miniature LDOs: LD ma, High PSRR LDO in DFN4-1x1 19 Main benefits and Applications Input voltage: from 1.4V to 5.5V Very Low Dropout Voltage: (300mV 200mA) 2% and 0.5% (coming soon) output voltage precision Very Low Quiescent Current 20µA no load 100µA 200mA load 0.1µA MAX in OFF mode Wide Output voltage range choice: from 0.8V to 5Vin in 50mV step Logic Controlled Electronic Shutdown Internal Soft Start Output Voltage Discharge Feature Compatible with Ceramic Capacitors COUT=1µF Available in DFN 4L 1x1mm2 This high performance, miniature LDO is designed to cover the need for localized low current POLs in the latest generation of Smartphones/Tablets, such as Samsung Galaxy Family (S3, S4,.. Note) DFN1x1 is more and more becoming the standard for low current POL replacing the SC70 and SOT23 BCD8_SP Technology=maximum performance/cost ratio Die Size: 0.47x0.47mm 2 0.5% output tolerance is reached by Laser Fuse technology 20 versions of output voltage will be available immediately, thanks to Multi-output wafer LD39020 is going to be the first LDO to be manufactured in ST s Bumpless CSP for a total package dimension of 0.5x0.5mm 2

20 Miniature LDOs: LD ma, Ultra low Iq LDO in CSP 0.69 x Main benefits and Applications Input voltage: from 1.4 to 5.5 V Guaranteed output current: 300 ma Automatic green mode for low consumption at light loads: 1 μa typ in low power mode 55 μa 300 ma load 0.1 μa typ in off mode Fixed versions from 0.8 V up to 4.0V in 100mV step Adjustable version (0.8V) available in DFN 6L 1.2x1.3 High PSRR: 1kHz, 10kHz Very low dropout voltage: 300 mv 300 ma Internal soft start Miniature Packages: Thanks to the ultra-miniature packages and to the green mode function, this high performance LDO can easily fit into very small portable appliances, maximizing the battery life: Smartphones/Tablets Media players and accessories Healthcare/medical devices (hearing aids ) Bluetooth headphones Remote controls and sensors

21 The cost-effective program LDOs: Key Features The value of performances 21 Low dropout voltage Good noise & PSRR figures Low quiescent current Wide range of packages available Main benefits Well balanced cost/performance ratio Easy design and implementation Good dynamic performances Applications This family of LDOs is designed for high volume application that need the perfomance of an LDO at competitive prices: Consumer applications Electronic gadgets and games Sport accessories Cell Phones, Cordless

22 The cost-effective program LDOs: LDKxx and LDLxx family 22 LDK mA, Low Drop, Noise reduction pin Available in SOT23-5L, SC70, DFN6 1.2x1.3 LDK mA, Low Drop, Noise reduction pin Available in SOT23-5L, SC70, DFN6 1.2x1.3 LDKxx: Low current (up to 300mA) LDK mA, Low Drop Available in SOT23-5L, SC70, DFN6 1.2x1.3 LDLxx: Medium current (1.2A) LDL A, very low drop, Reverse current protection Available in SO8, DFN6 2x2 and 3x3 LDL A, very low drop Available in SO8, DFN6 2x2 and 3x3

23 LDOs portfolio Ultra Low dropout Low current ( 300mA) Part Number Maximum current [ma] Dropout max load [mv] Quiescent no load (µa) Input Voltage range [V] PSRR 1Khz [db] Noise [µvrms] LDCL LD LD LD STLQ LDK LDK LD39030S NEW!

24 Ultra Low dropout Medium current ( > 300mA) Typ Dropout max load [mv] Quiescent no load (µa) Input Voltage range [V] Maximum Part Number current [A] PSRR 1Khz [db] Noise [µvrms] LDFM LD LD LDF LD LD LD LD LD LD LDOs portfolio NEW!

25 LDOs portfolio Low quiescent current Maximum current [A] Quiescent no load (µa) Typ Dropout max load [mv] Input Voltage range [V] PSRR typ. [db] Noise [µvrms] Part Number STLQ ST LD LD LDLN STLQ LD LD LD LD LD NEW!

26 LDOs portfolio Low noise/high PSRR Maximum current [A] Quiescent no load (µa) Typ Dropout max load [mv] Input Voltage range [V] PSRR [db] Part Number LD LD LDLN LD LD LD LD LD LD Noise [µvrms] NEW!

27 Miniature LDOs portfolio Part Number Maximum current [A] Package Package dimension [mm 2 ] Characteristics Input Voltage range [V] STLQ50 50 SC70 2x2 Ultra low IQ LD39015J 150 CSP4 bumps 1.1x1.1 Low noise LD CSP4 bumps 0.8x0.8 Low noise LDLN DFN6 2x2 Ultra low noise LD SC70 2x2 High PSRR STLQ SOT x1.6 Ultra low Iq LD DFN4 1x1 High PSRR LDK SC70 2x2 DFN6 1.2x1.3 Cost-effective LDK SC70 2x2 DFN6 1.2x1.3 Cost-effective LD CSP4 bumps 0.8x0.8 Low noise LD CSP4 bumps 0.69x0.69 Green mode DFN6 1.2x1.3 Ultra low Iq NEW!

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