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HT2596S-ADJ

Public Made by Adom

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HTCSEMI DC-DC Converters, TO-263-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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HT2596S-ADJ

HTCSEMI · DC-DC Converters · TO-263-5

HT2596S-ADJ from HTCSEMI, in a TO-263-5. 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 Input (operating) voltage pin, with a recommended operating range of 4.5 V to 40 V and an absolute maximum of 45 V.
2 Output output Regulator switching output to the load, rated at an output voltage of -1.0 V minimum relative to GND in absolute maximum ratings, with the 3 A output load current.
3 GND power_in Common ground pin for the regulator.
4 FB input Feedback control pin with an absolute maximum voltage of -0.3 V to 25 V; on the adjustable version the output is set from 1.23 V to 37 V (+4%) through this pin.
5 SD input Switching on/off control pin with an absolute maximum input voltage of -0.3 V to 25 V, where the regulator is switched on at VIL 0.6 V maximum and switched off at VIH 2.0 V minimum.
6 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer HTCSEMI
Package TO-263-5
Category Power Management (PMIC)
Pins 6

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Feedback bias current IB 60 nA VFB = 1,3 V; VIN = 12 V 5
Feedback bias current IB 100 nA VFB = 1,3 V; VIN = 12 V 5
Oscillator frequency fOSC 127 173 kHz VIN = 12 V 5
Oscillator frequency fOSC 110 173 kHz VIN = 40 V 5
Output leakage current IL(-1) -60 mA VFB = 12 V; VIN = 40 V; VOUT = -1 V 5
Quiescent current IQ 10 mA VFB = 12 V; VIN = 12 V 5
Standby mode quiescent current ISTBY 250 uA VFB = 0 V; VIN = 40 V; VSD = 5 V 5
Standby mode quiescent current ISTBY 300 uA VFB = 0 V; VIN = 40 V; VSD = 5 V 5
SD pin high level input voltage (switching off) VIH 2 V VFB = 0 V; VIN = 12 V; VSD from 0,5 to 2,5 V 5
SD pin high level input current (switching off) IH 25 uA VIN = 12 V; VSD = 2,5 V 5
SD pin low level input current (switching on) IL 5 uA VIN = 12 V; VSD = 0,5 V 5
Efficiency 73 % VIN = 12 V; IOUT = 3 A 9
Max. duty cycle (ON) DCmax 100 % VFB = 0 V 9
Max. duty cycle (OFF) DCmin 0 % VFB = 12 V 9
Overheating protection operation threshold Th 160 °C 9
Junction temperature (recommended) Tj -40 125 °C * ambient temperature is indicated 4
Input (operating) voltage VIN 45 V 4
Output voltage relative to GND VOUT -1 V 4
Storage temperature Tstg -60 150 °C 4
Junction temperature (absolute maximum) Tj -40 150 °C * ambient temperature is indicated 4
Thermal resistance junction-ambient Rth j-a 65 °C/W without additional heat sink (note **) 4
Thermal resistance junction-ambient (with heat sink) Rth j-a 28 °C/W IC with copper radiator 19 cm² (note **) 4

CAD (KiCad official)

  • Symbol: HT2596S-ADJ
  • Footprint: Package_TO_SOT_SMD:TO-263-5_TabPin6
  • 3D model: TO-263-5 (KiCad packages3D, STEP)
  • 3D model files: ht2596s-adj-etched.step / ht2596s-adj-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ht2596s-adj.step / ht2596s-adj.glb are the bare package body.

Provenance

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

  • Datasheet: HTCSEMI datasheet (11 pp, sha256 14d19af2db5acdf3, 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