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LP3982H-28B5F

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

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LP3982H-28B5F

LOWPOWER · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5

LP3982H-28B5F 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 VIN power_in Supply input pin that must be closely decoupled to GND with a 1μF or greater ceramic capacitor placed as close to the pin as possible; input voltage range is 2.2V to 5.5V.
2 GND power_in Ground pin.
3 EN input Active-high enable pin: driving EN over 1V turns on the regulator and driving EN below 0.4V puts it into shutdown mode.
4 NC unconnected No connection.
5 VOUT power_out Regulated output pin that must be bypassed with a 1μF or greater ceramic capacitor to ground, placed as close to the pin as possible.

Key specifications

Parameter Value
Manufacturer LOWPOWER
Package SOT-23-5
Category Power Management (PMIC)
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
Input Voltage Operation Range VIN 2.2 5.5 V 5
Inrush Current IInrush 400 mA COUT=10μF 5
DC Supply Quiescent Current IQ 58 μA IOUT=0mA 5
Shutdown Current ISD 0.6 μA VEN=0V 5
Output Voltage Accuracy (2.8V variant) VOUT 2.772 2.8 2.828 V IOUT=1mA 5
Output Voltage Line Regulation 0.01 %/V VIN=VOUT+0.5V~5.5V IOUT=1mA 5
Output Voltage Load Regulation ΔVLOAD 36 70 mV IOUT from 1mA to 600mA 5
VOUT Temperature Coefficient TCVOUT 0.01 %/℃ IOUT=1mA 5
Max Load Current IOUT_MAX 600 mA VEN=VIN 5
Load Current Limit ILIMIT 800 1100 mA VEN=VIN 5
Short Current ISHORT 195 mA VEN=VIN, VOUT short to GND 5
Power Supply Rejection Ratio at 100Hz PSRR 80 dB VIN=(VOUT+1V)DC+0.2VP-P, IOUT=20mA, VOUT=2.8V, f=100Hz 5
Power Supply Rejection Ratio at 1kHz PSRR 75 dB VIN=(VOUT+1V)DC+0.2VP-P, IOUT=20mA, VOUT=2.8V, f=1kHz 5
Power Supply Rejection Ratio at 10kHz PSRR 60 dB VIN=(VOUT+1V)DC+0.2VP-P, IOUT=20mA, VOUT=2.8V, f=10kHz 5
Power Supply Rejection Ratio at 100kHz PSRR 50 dB VIN=(VOUT+1V)DC+0.2VP-P, IOUT=20mA, VOUT=2.8V, f=100kHz 5
Output Noise Voltage (2.8V variant) eN 42 μVRMS 10Hz~100kHz, IOUT=20mA, VOUT=2.8V 5
Thermal Shutdown Threshold TSD 160 ℃ 6
Thermal Shutdown Hysteresis ΔTSD 20 ℃ 6
VOUT Rise Time trise 30 μs IOUT=0mA 6
Auto-discharge On-Resistance RDISC 850 Ω 6
EN Logic High Voltage VENH 1 V 6
EN Logic Low Voltage VENL 0.4 V 6
EN Input Current IEN 120 nA VEN=0 to 5.5V 6
VIN Pin to GND -0.3 6.5 V 4
VOUT, EN Pin to GND -0.3 V 4
Maximum Junction Temperature TJ 150 ℃ 4
Operating Ambient Temperature Range TA -40 85 ℃ 4
Maximum Soldering Temperature 260 ℃ at leads, 10 sec 4
ESD Human Body Model 4 kV HBM 4
ESD Charged Device Model 1 kV CDM 4
Input Voltage (recommended) 2.2 5.5 V 4
Operating Junction Temperature Range TJ -40 150 ℃ 4
Ambient Temperature Range (recommended) TA -40 85 ℃ 4

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts copper practically possible to the respective LDO pins. Place ground return connections to the input and output capacitors, and to the LDO ground pin as close to each other as possible with a wide and compon 12

CAD (KiCad official)

  • Symbol: LP3982H-28B5F
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: lp3982h-28b5f-etched.step / lp3982h-28b5f-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lp3982h-28b5f.step / lp3982h-28b5f.glb are the bare package body.

Provenance

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

  • Datasheet: LOWPOWER datasheet (18 pp, sha256 fdcbfba8996262fb, retrieved 2026-10-17, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-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