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HT5429AREZ

Public Made by Adom

by adom

HTCSEMI DC-DC Converters, ESOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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HT5429AREZ

HTCSEMI · DC-DC Converters · ESOP-8

HT5429AREZ from HTCSEMI, in a ESOP-8. 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 GATE output Power-stage gate drive output that switches the external N-channel MOSFET.
2 SENS input The voltage between SENS and IN sets the input current limit through an external sense resistor, with a typical threshold of 57 mV.
3 IN power_in Input supply pin; the recommended operating supply is 3.0 V to 20 V, with an absolute maximum of 36 V.
4 SS passive Soft-start pin where an external capacitor to GND is charged by a 5 µA source, and leaving it open disables soft-start.
5 COMP passive Error-amplifier compensation pin, where a capacitor and resistor in series to GND stabilize the control loop.
6 VDD power_out Internal bias supply output that requires a 2.2 µF ceramic capacitor placed as close to the pin as possible.
7 FB input Feedback voltage input with a 1.25 V reference, connected to an external resistor divider.
8 EN input Enable pin where high turns the chip on and low turns it off, and it must not be left floating.
9 GND power_in Chip ground connected to the thermal pad of the ESOP8 package.

Key specifications

Parameter Value
Manufacturer HTCSEMI
Package ESOP-8
Category Power Management (PMIC)
Pins 9

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 voltage range VIN 3 22 V 3
Input supply voltage VIN 3 20 V 2
Output voltage VOUT 5 22 V 2
EN bias current EN 0 0.3 mA 2
Operating critical temperature -40 125 °C 2
IN, SENSE pin voltage IN, SENSE -0.5 36 V 2
Other pins voltage -0.3 6 V 2
EN bias current EN 0.5 mA 2
Junction temperature 150 °C 2
Storage temperature -65 150 °C 2
VOUT-VIN differential VOUT-VIN 10 V 2
Undervoltage lockout threshold VUVLO 2.9 V VIN Rising 3
UVLO hysteresis ΔVUVLO 200 mV 3
VDD voltage VDD 4.75 5 5.25 V C=10nF, VIN=12V, -40℃<T<85℃ 3
Shutdown current ISD 0.8 μA VEN = 0V 3
Quiescent current IQ 660 μA VFB = 1.4V 3
Switching frequency FREQ 650 kHz 3
Minimum off time TON 100 ns VFB = 0V 3
Minimum on time TOFF 100 ns VFB = 1.4V 3
EN high turn-on threshold EN-ON 1.584 1.7 V VEN Rising (switching) 3
EN low threshold EN-OFF 0.5 V VEN Falling 3
Soft-start current SS 5.1 μA 3
FB threshold voltage VFB 1.23 1.25 1.27 V 3
FB bias current IFB -100 nA 3
Thermal shutdown TSD 150 ℃ 3
Input current limit ICL 11.4 A RSENSE=5m 3
Input current limit ICL 5.7 A RSENSE=10m 3
Input current limit threshold VCL 57 mV VIN-SENS 3
Input current limit time TCL 500 μs 3

CAD (KiCad official)

  • Symbol: HT5429AREZ
  • Footprint: Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm
  • 3D model: ESOP-8 (KiCad packages3D, STEP)
  • 3D model files: ht5429arez-etched.step / ht5429arez-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ht5429arez.step / ht5429arez.glb are the bare package body.

Provenance

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

  • Datasheet: HTCSEMI datasheet (8 pp, sha256 925c355fc4bd463a, retrieved 2026-10-27, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • 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