component

HT7540S

Public Made by Adom

by adom

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

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HT7540S

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

HT7540S from UMW, in a SOT-23. 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 GND power_in Ground reference pin for the HT75xx LDO regulator.
2 VIN power_in Regulator input pin; the maximum input voltage is 30 V and the 7540 is specified at VIN = 6 V (5 V to 30 V line range).
3 VOUT power_out Regulated output pin; the 7540 output is 4.0 V typical (3.88 V to 4.12 V at VIN = 6 V, IOUT = 10 mA), with at least 60 mA output current.

Key specifications

Parameter Value
Manufacturer UMW
Package SOT-23
Category Power Management (PMIC)
Pins 3

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Maximum input voltage VIN 30 V 3
Power waste (SOT-23 package) PD 300 mW SOT-23 column 3
Working temperature Tw -40 85 °C 3
Storage temperature Tc -50 125 °C 3
Welding temperature Th 260 °C 10s 3
Output voltage VOUT 3.88 4 4.12 V VIN=6V, IOUT=10mA 5
Output current IOUT 60 mA VIN=6V 5
Drop voltage VDIF 100 150 mV IOUT=1mA 5
Quiescent current ISS 3 µA VIN=6V, no load 5
Output voltage temperature coefficient ΔVOUT/ΔTA -0.7 0.7 mV/°C VIN=6V, IOUT=10mA, 0°C≤TA≤70°C 5

CAD (KiCad official)

  • Symbol: HT7540S
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: ht7540s-etched.step / ht7540s-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ht7540s.step / ht7540s.glb are the bare package body.

Provenance

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

  • Datasheet: UMW datasheet (15 pp, sha256 c8d27849b87576cd, retrieved 2026-10-18, 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