component
HT2596S-ADJ
Public Made by Adomby adom
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ht2596s-adj.step/ht2596s-adj.glbare 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, primaryclaude-haiku-5-5(text), consensusclaude-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).
# 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](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590226480279158784) (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](docs/ht2596s-adj-datasheet.pdf)