component
HT7181SPER
Public Made by Adomby adom
Jiaxing Heroic Elec Tech DC-DC Converters, SOP-8-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownHT7181SPER
Jiaxing Heroic Elec Tech · DC-DC Converters · SOP-8-EP
HT7181SPER from Jiaxing Heroic Elec Tech, in a SOP-8-EP. 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 | FB | input | Voltage feedback input; output voltage is set by the RUP/RDN divider with VREF = 1.204V (absolute max -0.3V to 3.6V). |
| 2 | VOUT | power_in | Power supply pin; supply range 2.7V to 16.8V, UVLO rising 2.7V/falling 2.5V, overvoltage protection at 17.8V typical (absolute max 18V). |
| 3 | EN | input | Enable logic input; high above 1.5V enables the device, low below 0.4V puts it into shutdown, with about 800kΩ internal pull-down (absolute max 7V). |
| 4 | SW | passive | Switching node of the converter connecting the inductor, with 20mΩ internal power switch and absolute max of 22V. |
| 5 | SS/EMI | output | Soft-start programming pin with external capacitor CSS to ground (100nF recommended, 5uA charging current); adding a 330k resistor to ground selects the flatter tr/tf mode. |
| 6 | ILIM | input | Adjustable switch peak current limit set by an external resistor to ground; the limit must be set below 14A. |
| 7 | COMP | output | Output of the internal error amplifier; loop compensation network is connected here (absolute max 7V). |
| 8 | VCC | power_out | Output of the internal regulator; a 1uF ceramic capacitor to ground is required (absolute max 7V). |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Jiaxing Heroic Elec Tech |
| Package | SOP-8-EP |
| 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 |
|---|---|---|---|---|---|---|---|
| Voltage range VOUT | VOUT | -0.3 | 18 | V | 5 | ||
| Voltage range SW | SW | -0.3 | 22 | V | 5 | ||
| Voltage range EN, VCC, COMP | -0.3 | 7 | V | EN, VCC, COMP | 5 | ||
| Voltage range FB | FB | -0.3 | 3.6 | V | 5 | ||
| Operating temperature range | TA | -40 | 85 | ℃ | 5 | ||
| Operating junction temperature range | TJ | -40 | 150 | ℃ | 5 | ||
| Storage temperature range | TSTG | -50 | 150 | ℃ | 5 | ||
| Supply voltage range | VOUT | 2.7 | 16.8 | V | 5 | ||
| Operating temperature | Ta | -40 | 25 | 85 | ℃ | 5 | |
| Operating junction temperature | TJ | -40 | 125 | ℃ | 5 | ||
| Power voltage range | VOUT | 2.7 | 16.8 | V | 5 | ||
| UVLO threshold rising | VUVLO | 2.7 | V | Rising | 5 | ||
| UVLO threshold falling | VUVLO | 2.5 | V | Falling | 5 | ||
| Quiescent current | IQ | 0.3 | mA | VFB = 1.3V, No switching | 5 | ||
| Shutdown current | ISD | 1 | uA | IC disabled, no load, no feedback resistor divider | 5 | ||
| VCC regulation light load | VCC | 5.7 | V | VIN = 3.6V, VOUT = 12V, light load | 5 | ||
| VCC regulation 0.5A | VCC | 5.3 | V | VIN = 3.6V, VOUT = 12V, ILOAD = 0.5A | 5 | ||
| Reference voltage at the FB pin | VREF | 1.204 | V | 5 | |||
| Output overvoltage protection | VOVP | 17.8 | V | 5 | |||
| Soft-start charging current | ISS | 5 | uA | 5 | |||
| EN high threshold voltage | VENH | 1.5 | V | 5 | |||
| EN low threshold voltage | VENL | 0.4 | V | 5 | |||
| EN internal pull-down resistance | REN | 800 | kΩ | 5 | |||
| MOSFET on-resistance | RDS(on) | 20 | mΩ | Including wire bond | 5 | ||
| Operation Frequency | Fosc | 360 | kHz | 5 | |||
| Peak switch current limit | ILIM | 14 | A | 6 | |||
| Thermal shutdown threshold | TSD | 150 | ℃ | 6 | |||
| Thermal shutdown hysteresis | TSD_HYS | 20 | ℃ | 6 |
CAD (KiCad official)
- Symbol:
HT7181SPER - Footprint:
Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm - 3D model: SOP-8-EP (KiCad packages3D, STEP)
- 3D model files:
ht7181sper-etched.step/ht7181sper-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ht7181sper.step/ht7181sper.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Jiaxing Heroic Elec Tech datasheet (17 pp, sha256
0d2c6f4666fcfe44, retrieved 2026-10-22, 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, primaryclaude-sonnet-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).