component

HT2785AH50RZ

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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HT2785AH50RZ

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

HT2785AH50RZ 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 VIN power_in Supply voltage input with a DC operating range of 25 V to 450 V (3.3 V option) and an absolute maximum of -0.3 V to 700 V; connect a 2.2 μF capacitor from VIN to GND.
2 GND power_in Ground connection, which is also electrically the tab of the SOT-89 package.
3 VOUT power_out Regulator output providing 3.3 V, 5 V, 12 V or 15 V at up to 10 mA; connect 22 μF or larger MLCC capacitor from VOUT to GND, with absolute maximum rating of -0.3 V to 18 V.

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
Operating Input Voltage DC VIN 50 450 V 3
Output Voltage Accuracy (TJ = 25°C) VOUT 4.775 5 5.225 V TJ = 25°C, Iout = 100 A, 50 V ≤ Vin ≤ 450 V 3
Output Voltage Accuracy (−40°C ≤ TJ ≤ 85°C) VOUT 4.75 5 5.25 V −40°C ≤ TJ ≤ 85°C, Iout = 100 A, 50 V ≤ Vin ≤ 450 V 3
Line Regulation RegLINE -0.5 0.2 0.5 % 50 V ≤ Vin ≤ 450 V, Iout = 100 A 3
Load Regulation RegLOAD -1 0.62 1 % 100 A ≤ IOUT ≤ 10 mA, Vin = 55 V 3
Maximum Output Current IOUT 10.5 mA 55 V ≤ Vin ≤ 450 V 3
Quiescent Current IQ 16 21 A IOUT = 0, 50 V ≤ Vin ≤ 450 V 3
Ground Current IGND 23 A 50 V ≤ Vin ≤ 450 V, 0 < IOUT ≤ 10 mA 3
Power Supply Rejection Ratio PSRR 70 dB Vin = 340 VDC +1 Vpp modulation, Iout = 100 A, f = 1 kHz 3
Output Noise VNOISE 300 Vrms f = 100 Hz to 100 kHz, Vin = 340 VDC, Iout = 100 A 3
Input Voltage (absolute maximum) VIN -0.3 700 V Note 1 2
Output Voltage (absolute maximum) VOUT -0.3 18 V 2
Maximum Junction Temperature TJ(MAX) 150 °C 2
Storage Temperature TSTG -55 150 °C 2
ESD Capability, Human Body Model ESDHBM 2000 V All pins except HV pin no.1 (Note 2) 2
ESD Capability, Machine Model ESDMM 200 V Note 2 2
Thermal Shutdown Temperature TSD 145 °C Temperature increasing from TJ = +25°C 3
Thermal Shutdown Hysteresis TSDH 10 °C Temperature falling from TSD 3
Thermal Resistance, Junction-to-Air RJA 79 °C/W 2

CAD (KiCad official)

  • Symbol: HT2785AH50RZ
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89 (KiCad packages3D, STEP)
  • 3D model files: ht2785ah50rz-etched.step / ht2785ah50rz-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ht2785ah50rz.step / ht2785ah50rz.glb are the bare package body.

Provenance

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

  • Datasheet: HTCSEMI datasheet (14 pp, sha256 94901f0a04ddd533, retrieved 2026-11-05, 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