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HT1117AH-ADJ

Public Made by Adom

by adom

HTCSEMI Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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HT1117AH-ADJ

HTCSEMI · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89

HT1117AH-ADJ from HTCSEMI, in a SOT-89. 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 ADJ/GND passive Adjust/ground pin that sets the adjustable output through the external R1/R2 divider to the 1.25 V reference (Vref 1.238 V to 1.262 V), with adjust pin current typically 52 µA and at most 120 µA.
2 VOUT power_out Regulated output pin, also connected to the heatsink tab; the output capacitor must be at least 4.7 µF with ESR between 33 mΩ (typ) and 2.2 Ω for stability.
3 VIN power_in Unregulated input pin with a 20 V maximum input rating, which should be bypassed with a 10 µF capacitor placed directly across the input and ground terminals.

Key specifications

Parameter Value
Manufacturer HTCSEMI
Package SOT-89
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
Reference Voltage, Adjustable Output Devices (Vin-Vout = 2.0 V, Iout = 10 mA, TA = 25°C) Vref 1.238 1.25 1.262 V Vin-Vout = 2.0 V, Iout = 10 mA, TA = 25°C 3
Reference Voltage, Adjustable Output Devices (Vin-Vout = 1.4 V to 10 V, Iout = 10 mA to 800 mA) Vref 1.225 1.27 V Vin-Vout = 1.4 V to 10 V, Iout = 10 mA to 800 mA (Note 4) 3
Line Regulation, Adjustable Regline 0.04 0.1 % Vin = 2.75 V to 16.25 V, Iout = 10 mA (Note 5) 3
Load Regulation, Adjustable Regline 0.2 0.4 % Iout = 10 mA to 800 mA, Vin = 4.25 V (Note 5) 3
Minimum Required Load Current for Regulation, Adjustable Output Devices IL(min) 0.8 5 mA Vin = 15 V 3
Dropout Voltage (Iout = 100 mA) Vin−Vout 0.95 1.1 V Measured at Vout − 100 mV; Iout = 100 mA 3
Dropout Voltage (Iout = 500 mA) Vin−Vout 1.01 1.15 V Measured at Vout − 100 mV; Iout = 500 mA 3
Dropout Voltage (Iout = 800 mA) Vin−Vout 1.07 1.2 V Measured at Vout − 100 mV; Iout = 800 mA 3
Output Current Limit Iout 1000 1500 2200 mA Vin−Vout = 5.0 V, TA = 25°C (Note 6) 3
Adjustment Pin Current Iadj 52 120 µA Vin = 11.25 V, Iout = 800 mA 4
Adjust Pin Current Change Iadj 0.4 5 µA Vin−Vout = 1.4 V to 10 V, Iout = 10 mA to 800 mA 4
Thermal Regulation 0.01 0.1 %/W TA = 25°C, 30 ms Pulse 4
Ripple Rejection, Adjustable RR 67 73 dB Vin−Vout = 6.4 V, Iout = 500 mA, 10 Vpp 120 Hz Sinewave 4
Input Voltage Vin 20 V 2
Maximum Die Junction Temperature Range TJ -55 150 °C 2
Storage Temperature Range Tstg -65 150 °C 2
Operating Ambient Temperature Range TA -40 125 °C 2

CAD (KiCad official)

  • Symbol: HT1117AH-ADJ
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89 (KiCad packages3D, STEP)
  • 3D model files: ht1117ah-adj-etched.step / ht1117ah-adj-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ht1117ah-adj.step / ht1117ah-adj.glb are the bare package body.

Provenance

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

  • Datasheet: HTCSEMI datasheet (16 pp, sha256 3729369ddb90e7c5, 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