STMicroelectronics Fixed and Adjustable Output LDOs

STMicroelectronics Fixed and Adjustable Output LDOs

STMicroelectronics offers fixed and adjustable output LDO regulators featuring an optimal combination of power supply rejection ratio, low noise, quiescent current, and tiny packages. They are ideal for battery-powered applications (tablets, smartphones, portable healthcare, and fitness) where both optimum heat dissipation and small dimensions are key factors.

View All STMicro LDOs Low Drop Out Regulators (LDO)

Vin Iout Vout Adjustable Voltage
Selecting a Vin and/or Iout value above will display all products with that value and higher
Part
Number
Data
Sheet
Vin - Max (V) Iout - Max (mA) Vout (V)   Package
Description
Ultra LDO Low Noise/
High PSRR
Low
Quiescent Current
Tiny
Pkg
Dropout
Voltage [mV]
Noise [uV RMS] PSRR [dB] Quiescent
Current [uA]
LD39015J12R 5.5 150 1.2VV NotV CSPS0.5 4-6 80 29 65 18
LD39015M08R 5.5 150 0.8V NotV SOT 23 5L 80 29 65 18
LD39015M10R 5.5 150 1V NotV SOT 23 5L 80 29 65 18
LD39015M125R 5.5 150 1.25V NotV SOT 23 5L 80 29 65 18
LD39015M12R 5.5 150 1.2V NotV SOT 23 5L 80 29 65 18
LD39015M15R 5.5 150 1.5V NotV SOT 23 5L 80 29 65 18
LD39015M18R 5.5 150 1.8V NotV SOT 23 5L 80 29 65 18
LD39015M25R 5.5 150 2.5V NotV SOT 23 5L 80 29 65 18
LD39015M33R 5.5 150 3.3Vv NotV SOT 23 5L 80 29 65 18
LD39015XG08R 5.5 150 0.8V NotV SOT 666 80 29 65 18
LD39015XG10R 5.5 150 1V NotV SOT 666 80 29 65 18
LD39050PU25R 5.5 500 2.5V NotV VFDFPN 6 3X3 0,95 PITCH   200 30 65 20
LD39050PU33R 5.5 500 3.3Vv NotV VFDFPN 6 3X3 0,95 PITCH   200 30 65 20
LD39050PUR* 5.5 500 0.8V 0.8V 1V 1.2V 1.22V 1.35V 1.5V 1.8V 2.5V 2.7V 2.8V 2.9V 3Vo 3.1Vv 3.3Vv 4.7V v5V Variable VFDFPN 6 3X3 0,95 PITCH   200 30 65 20
LD39080DT12-R 6 800 1.22V NotV TO-252 DPAK Cu Wire       150 100 55 1000
LD39080DT18-R 6 800 1.8V NotV TO-252 DPAK Cu Wire       150 100 55 1000
LD39080DT25-R 6 800 2.5V NotV TO-252 DPAK Cu Wire       150 100 55 1000
LD39080DT33-R 6 800 3.3Vv NotV TO-252 DPAK Cu Wire       150 100 55 1000
LD39080PT18-R 6 800 1.8V NotV PPACK 5 LEADS       150 100 55 1000
LD39080PT25-R 6 800 2.5V NotV PPACK 5 LEADS       150 100 55 1000
LD39080PT33-R 6 800 3.3Vv NotV PPACK 5 LEADS       150 100 55 1000
LD39080PT-R* 6 800 1.22V 1.22V 1.35V 1.5V 1.8V 2.5V 2.7V 2.8V 2.9V 3Vo 3.1Vv 3.3Vv 4.7V v5V Variable PPACK 5 LEADS       150 100 55 1000
LD39100PUR* 5.5 1000 0.8V 0.8V 1V 1.2V 1.22V 1.35V 1.5V 1.8V 2.5V 2.7V 2.8V 2.9V 3Vo 3.1Vv 3.3Vv 4.7V v5V Variable VFDFPN 6 3X3 0,95 PITCH   200 30 65 20
LD39115J12R 5.5 150 1.2V NotV CSPS0.4 4-6 80 33 74 20
LD39115J15R 5.5 150 1.5V NotV CSPS0.4 4-6 80 33 74 20
LD39115J25R 5.5 150 2.5V NotV CSPS0.4 4-6 80 33 74 20
LD39115J33R 5.5 150 3.3Vv NotV CSPS0.4 4-6 80 33 74 20
LD39150DT18-R 6 1500 1.8V NotV TO-252 DPAK Cu Wire       200 100 65 1000
LD39150DT25-R 6 1500 2.5V NotV TO-252 DPAK Cu Wire       200 100 65 1000
LD39150DT33-R 6 1500 3.3Vv NotV TO-252 DPAK Cu Wire       200 100 65 1000
LD39150PT18-R 6 1500 1.8V NotV PPACK 5 LEADS       200 100 65 1000
LD39150PT25-R 6 1500 2.5V NotV PPACK 5 LEADS       200 100 65 1000
LD39150PT33-R 6 1500 3.3Vv NotV PPACK 5 LEADS       200 100 65 1000
LD39150PT-R* 6 1500 1.22V 1.22V 1.35V 1.5V 1.8V 2.5V 2.7V 2.8V 2.9V 3Vo 3.1Vv 3.3Vv 4.7V v5V Variable PPACK 5 LEADS       200 100 65 1000
LD39150PU-R* 6 1500 1.22V 1.22V 1.35V 1.5V 1.8V 2.5V 2.7V 2.8V 2.9V 3Vo 3.1Vv 3.3Vv 4.7V v5V Variable VFDFPN 6 3X3 0,95 PITCH       200 100 65 1000
LD39300DT12-R 6 3000 1.22V NotV TO-252 DPAK Cu Wire       200 100 65 1200
LD39300DT18-R 6 3000 1.8V NotV TO-252 DPAK Cu Wire       200 100 65 1200
LD39300DT25-R 6 3000 2.5V NotV TO-252 DPAK Cu Wire       200 100 65 1200
LD39300DT33-R 6 3000 3.3Vv NotV TO-252 DPAK Cu Wire       200 100 65 1200
LD39300PT-R* 6 3000 1.22V 1.22V 1.35V 1.5V 1.8V 2.5V 2.7V 2.8V 2.9V 3Vo 3.1Vv 3.3Vv 4.7V v5V Variable PPACK 5 LEADS       200 100 65 1200
LD3980PU08R 3.6 300 0.8V NotV VFDFPN 6 3X3 0,95 PITCH     130 110 60 110
LD3980PU135R 3.6 300 1.35V NotV VFDFPN 6 3X3 0,95 PITCH     130 110 60 110
LD3980PU18R 3.6 300 1.8V NotV VFDFPN 6 3X3 0,95 PITCH     130 110 60 110
LD3985G18R 6 150 1.8V NotV TSOT23-5L   60 30 60 85
LD3985G25R 6 150 2.5V NotV TSOT23-5L   60 30 60 85
LD3985G27R 6 150 2.7V NotV TSOT23-5L   60 30 60 85
LD3985G30R 6 150 3Vo NotV TSOT23-5L   60 30 60 85
LD3985G33R 6 150 3.3Vv NotV TSOT23-5L   60 30 60 85
LD3985J18R 6 150 1.8V NotV CSPS0.5 4-6   60 30 60 85
LD3985J25R 6 150 2.5V NotV CSPS0.5 4-6   60 30 60 85
LD3985J33R 6 150 3.3Vv NotV CSPS0.5 4-6   60 30 60 85
LD3985M122R 6 150 1.22V NotV SOT 23 5L   60 30 60 85
LD3985M18R 6 150 1.8V NotV SOT 23 5L   60 30 60 85
LD3985M25R 6 150 2.5V NotV SOT 23 5L   60 30 60 85
LD3985M27R 6 150 2.7V NotV SOT 23 5L   60 30 60 85
LD3985M28R 6 150 2.8V NotV SOT 23 5L   60 30 60 85
LD3985M29R 6 150 2.9V NotV SOT 23 5L   60 30 60 85
LD3985M30R 6 150 3Vo NotV SOT 23 5L   60 30 60 85
LD3985M33R 6 150 3.3Vv NotV SOT 23 5L   60 30 60 85
LD3985M47R 6 150 4.7V NotV SOT 23 5L   60 30 60 85
LD49150PT08R* 5.5 1500 0.8V 0.8V 1V 1.2V 1.22V 1.35V 1.5V 1.8V 2.5V 2.7V 2.8V 2.9V 3Vo 3.1Vv 3.3Vv 4.7V v5V Variable PPACK 5 LEADS       200 65 68 6000
LD49150PT10R 5.5 1500 1V NotV PPACK 5 LEADS       200 65 68 6000
LD49150PT12R 5.5 1500 1.2V NotV PPACK 5 LEADS       200 65 68 6000
LD49300PT08R* 5.5 3000 0.8V 0.8V 1V 1.2V 1.22V 1.35V 1.5V 1.8V 2.5V 2.7V 2.8V 2.9V 3Vo 3.1Vv 3.3Vv 4.7V v5V Variable PPACK 5 LEADS       400 65 68 6000
LD49300PT10R 5.5 3000 1V NotV PPACK 5 LEADS       400 65 68 6000
LD49300PT12R 5.5 3000 1.2V NotV PPACK 5 LEADS       400 65 68 6000
LD59015C33R 5.5 150 3.3Vv NotV SOT 323 5LDS   150 20 76 31
LDCL015M33R 5.5 150 3.3Vv NotV SOT 23 5L     50 40 52 120
LDCL015MR* 5.5 150 0.8V 0.8V 1V 1.2V 1.22V 1.35V 1.5V 1.8V 2.5V 2.7V 2.8V 2.9V 3Vo 3.1Vv 3.3Vv 4.7V v5V Variable SOT 23 5L     50 40 52 120
LDS3985M15R 6 300 1.5V NotV SOT 23 5L     150 30 55 85
LDS3985M18R 6 300 1.8V NotV SOT 23 5L     150 30 55 85
LDS3985M25R 6 300 2.5V NotV SOT 23 5L     150 30 55 85
LDS3985M28R 6 300 2.8V NotV SOT 23 5L     150 30 55 85
LDS3985M30R 6 300 3Vo NotV SOT 23 5L     150 30 55 85
LDS3985M33R 6 300 3.3Vv NotV SOT 23 5L     150 30 55 85
LDS3985M50R 6 300 5Vv NotV SOT 23 5L     150 30 55 85
LDS3985PU15R 6 300 1.5V NotV VFDFPN 6 3X3 0,95 PITCH     150 30 55 85
LDS3985PU28R 6 300 2.8V NotV VFDFPN 6 3X3 0,95 PITCH     150 30 55 85
LDS3985PU33R 6 300 3.3Vv NotV VFDFPN 6 3X3 0,95 PITCH     150 30 55 85
ST715M25R 24 85 2.5V NotV SOT 23 5L     500 95 62 3.8
ST715M33R 24 85 3.3Vv NotV SOT 23 5L     500 95 62 3.8
ST715MR* 24 85 1.2V 1.2V 1.22V 1.35V 1.5V 1.8V 2.5V 2.7V 2.8V 2.9V 3Vo 3.1Vv 3.3Vv 4.7V v5V Variable SOT 23 5L     500 95 62 3.8
ST715PU25R 24 85 2.5V NotV VFDFPN 8 3x3x1.0 PITCH 0.65 SAWN     500 95 62 3.8
ST715PU33R 24 85 3.3Vv NotV VFDFPN 8 3x3x1.0 PITCH 0.65 SAWN     500 95 62 3.8
ST715PUR* 24 85 1.2V 1.2V 1.22V 1.35V 1.5V 1.8V 2.5V 2.7V 2.8V 2.9V 3Vo 3.1Vv 3.3Vv 4.7V v5V Variable VFDFPN 8 3x3x1.0 PITCH 0.65 SAWN     500 95 62 3.8
STLQ015XG25R 5.5 150 2.5V NotV SOT 666   112 75 40 1
STLQ015XG28R 5.5 150 2.8V NotV SOT 666   112 75 40 1
STLQ015XG30R 5.5 150 3Vo NotV SOT 666   112 75 40 1
STLQ015XG31R 5.5 150 3.1Vv NotV SOT 666   112 75 40 1
STLQ015XG33R 5.5 150 3.3Vv NotV SOT 666   112 75 40 1
STLQ50C18R 12 50 1.8V NotV SOT 323 5LDS     400 560 30 5
STLQ50C25R 12 50 2.5V NotV SOT 323 5LDS     400 560 30 5
STLQ50C33R 12 50 3.3Vv NotV SOT 323 5LDS     400 560 30 5
STLQ50C50R 12 50 5Vv NotV SOT 323 5LDS     400 560 30 5
STLQ50C-R* 12 50 1.2V 1.2V 1.22V 1.35V 1.5V 1.8V 2.5V 2.7V 2.8V 2.9V 3Vo 3.1Vv 3.3Vv 4.7V v5V Variable SOT 323 5LDS     400 560 30 5
Part numbers with a "*" represent a product with an adjustable output voltage.
 

LDO Overview

These devices offer improved dropout, consumption and noise performances for several consumer, computing and industrial applications. They are available with an input voltage of up to 24V and maximum current up to 3A. Fixed and adjustable output voltage versions start from 0.8V and typical dropout voltage range is 0.05V to 0.5V.

They are available in the following packages (miniature to high power): CSP 08x08, CSP 1x1, DFN 3x3, SOT666, SC-70, TSOT23-5L, SOT23-5L, DPAK, PPAK.

Ultra-LDO 

LDOs are a special subset of linear regulators. The drop out is the minimum voltage across the regulator (input – output differential) to maintain regulation. An LDO achieves low power dissipation by allowing a lower input voltage to be used for a given output voltage compared to what a standard linear regulator would need to maintain regulation.

Ultra-Low Drop-Out voltage regulators (ULDOs) achieve a typical dropout voltage below 200mV at full load.

Low Noise/High PSRR 

The Power Supply Rejection Ratio (or Supply Voltage Rejection, SVR) measures how well an LDO rejects the ripple coming from the input at various frequencies. The PSRR is expressed in dB and it is measured as the ratio between the ripple on the input voltage and the ripple on the output voltage. LD59015 and LD39115 series of high PSRR LDOs from STMicroelectronics are specifically designed to improve this critical parameter in noise sensitive, RF and battery powered wireless applications.

Unlike PSRR, the output noise in an LDO is generated internally within the circuitry of the voltage regulator. Measured as a function of frequency (in µV/sqrt[Hz]) or alternatively as output noise voltage (in µVRMS over a range of frequency), noise is a critical parameter in RF and wireless applications. An optimized low-noise LDO design, like STMicroelectronics LDLN015, delivers an impressive low 6.3µVRMS output noise voltage from 10Hz to 100KHz.

Low Quiescent Current 

The quiescent current of an LDO is the current drawn from the input pin to power the internal circuitry when the LDO is regulating. This is different from the shutdown current which is measured when the LDO is off. The quiescent current is usually negligeable at full load, because it is several orders of magnitude smaller than the output current. It becomes a critical parameter at quasi-zero or very light load, to prolong battery life in applications with long standby time. A common issue is the trade off between low quiescent current and dynamic performance (load transient response and PSRR). STMicroelectronics STLQ015 achieves a fast load transient despite the extremely low quiescent current (1µA).

Tiny Package 

The ultra-small, high performance LDOs by STMicroelectronics are particularly suitable for the latest generation portable devices (tablets, smartphones, portable healthcare and fitness) where board space real estate is major constraint.

  • Chip-Scale-Package (Flip-Chip) 0.5 and 0.4mm pitch: 1x1mm, 0.8x0.8mm, 0.69x0.69mm
  • Dual-in-line Flat Non-leaded (DFN): 3x3mm, 2x2mm, 1.2x1.3mm
  • SOT666: 1.6x1.6mm