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LP3989AB5F

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LOWPOWER Linear Voltage Regulators (LDO), SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LP3989AB5F

LOWPOWER · Linear Voltage Regulators (LDO) · SOT-23-5

LP3989AB5F from LOWPOWER, in a SOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 EN input Chip Enable, active high (above 1.4V on, below 0.4V shutdown, max VIN+0.3V), with an integrated 1MΩ pull-down to GND when floating.
2 GND power_in Ground.
3 VOUT power_out Output voltage, set by Vout = VFB × (1+R1/R2) with VFB = 0.8V.
4 VIN power_in Power input voltage, 2.5V to 6V recommended operating range (absolute maximum 6.5V).
5 ADJ input Feedback pin with 0.8V reference voltage, connected to the R1/R2 divider.

Key specifications

Parameter Value
Manufacturer LOWPOWER
Package SOT-23-5
Category Power Management ICs
Pins 5

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Adjustable voltage reference VFB 0.784 0.8 0.816 V IOUT=1mA 4
Quiescent Current IQ 90 130 μA VEN ≥ 1.4V, IOUT = 0mA 4
Dropout Voltage 200mA VDROP 140 160 mV IOUT = 200mA, VOUT >2.8V 4
Dropout Voltage 400mA VDROP 280 320 mV IOUT = 400mA, VOUT >2.8V 4
Dropout Voltage 600mA VDROP 420 480 mV IOUT = 600mA, VOUT >2.8V 4
Standby Current ISTBY 0.01 1 μA VEN = GND, Shutdown 4
EN Input Bias Current IEN 0.8 5.3 μA VEN = 1V or 5V 4
EN Logic-Low Voltage VIL 0.4 V VIN = 3V to 5.5V, Shutdown 4
EN Logic-High Voltage VIH 1.4 V VIN = 3V to 5.5V, Start-Up (upper limit VIN+0.3V) 4
Output Loading Current ILOAD 600 mA VEN=VIN,VIN>2.5V 4
Current Limit ILIM 750 mA RLOAD = 1Ω 4
Line Regulation ΔVLINE 0.3 % VIN = (VOUT + 1V) to 5.5V, IOUT = 1mA 4
Load Regulation ΔLOAD 2 % 1mA < IOUT < 400mA 4
Output Noise Voltage 100 uVRMS 10Hz to 100kHz, IOUT=200mA, Cout=1µF 4
PSRR PSRR -76 dB f = 100Hz, COUT = 1µF, IOUT = 10mA 4
PSRR PSRR -68 dB f = 1kHz, COUT = 1µF, IOUT = 10mA 4
Thermal Shutdown Temperature TSD 150 °C 4
Supply Input Voltage VIN -0.3 6.5 V 3
EN Pin Voltage VEN -0.3 6.5 V -0.3V to Vin+0.3V 3
Power Dissipation SOT23-5 PD 500 mW TA = 25°C 3
Lead Temperature 260 °C Soldering, 10 sec. 3
Storage Temperature Range -40 165 °C 3
ESD HBM 2 kV Human Body Mode 3
ESD MM 200 V Machine-Mode 3
Supply Input Voltage VIN 2.5 6 V 3
Operation Ambient Temperature Range TA -20 85 °C 3
Thermal Resistance Junction to Ambient SOT23-5 θJA 195 °C/W SOT23-5 3
Maximum Operating Junction Temperature TJ(MAX) 125 °C 7

CAD (KiCad official)

  • Symbol: LP3989AB5F
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: lp3989ab5f-etched.step / lp3989ab5f-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lp3989ab5f.step / lp3989ab5f.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: LOWPOWER datasheet (8 pp, sha256 e8190e62c7e5db49, retrieved 2026-10-22, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF