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HT1117AM-3.3

Public Made by Adom

by adom

HTCSEMI Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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HT1117AM-3.3

HTCSEMI · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252

HT1117AM-3.3 from HTCSEMI, in a TO-252. 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 power_in Adjust/ground pin, which is the ground reference for the fixed-output HT1117AM-3.3 (shown as the ground connection in the fixed output regulator figure); the datasheet gives no separate electrical limit for this pin.
2 VOUT power_out Regulated output, and the heatsink tab is connected to this pin; output current must not exceed 1.0 A when Vin is greater than 12 V, and the output short-circuit duration is stated as infinite.
3 VIN power_in Unregulated input supply, with a maximum input voltage of 20 V and a 1.4 V minimum input-to-output differential for regulation; a 10 µF input bypass capacitor is recommended.

Key specifications

Parameter Value
Manufacturer HTCSEMI
Package TO-252
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
Output Voltage, Fixed 3.3 V (Iout = 10 mA, TA = 25 °C) Vout 3.267 3.3 3.333 V Vin = 5.3 V, Iout = 10 mA, TA = 25 °C 3
Output Voltage, Fixed 3.3 V (over line and load) Vout 3.235 3.365 V Vin = 4.75 V to 10 V, Iout = 0 mA to 800 mA (Note 4) 3
Line Regulation, Fixed 3.3 V Regline 0.8 4.5 mV Vin = 4.75 V to 15 V, Iout = 0 mA 3
Load Regulation, Fixed 3.3 V Regline 4.3 10 mV Iout = 0 mA to 800 mA, Vin = 4.75 V 3
Dropout Voltage at Iout = 100 mA Vin-Vout 0.95 1.1 V Measured at Vout − 100 mV, Iout = 100 mA 3
Dropout Voltage at Iout = 500 mA Vin-Vout 1.01 1.15 V Measured at Vout − 100 mV, Iout = 500 mA 3
Dropout Voltage at 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
Quiescent Current, 3.3 V IQ 6 10 mA Vin = 15 V 4
Thermal Regulation 0.01 0.1 %/W TA = 25°C, 30 ms pulse 4
Input Voltage Vin 20 V Note 1 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
Thermal Resistance, Junction-to-Ambient (DPAK) RJA 67 °C/W DPAK (Case 369A), minimum size pad, 2.0 oz copper 2
Thermal Resistance, Junction-to-Case (DPAK) RJC 6 °C/W DPAK (Case 369A) 2

CAD (KiCad official)

  • Symbol: HT1117AM-3.3
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252 (KiCad packages3D, STEP)
  • 3D model files: ht1117am-3-3-etched.step / ht1117am-3-3-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ht1117am-3-3.step / ht1117am-3-3.glb are the bare package body.

Provenance

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

  • Datasheet: HTCSEMI datasheet (16 pp, sha256 2326163a9bda347d, retrieved 2026-10-19, 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