component
HX6291
Public Made by Adomby adom
HX hengjiaxing DC-DC Converters, SOT-23-6. 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
markdownHX6291
HX hengjiaxing · DC-DC Converters · SOT-23-6
HX6291 from HX hengjiaxing, in a SOT-23-6. 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 | LX | output | Power switch output (boost switch node) of the internal 0.2 Ω, 2.5 A, 16 V MOSFET, with an absolute maximum LX voltage of 16 V and a requirement to keep the trace wide and short to reduce EMI. |
| 2 | GND | power_in | IC ground, which should be connected close to CIN and COUT on a ground plane. |
| 3 | FB | input | Error amplifier inverting input regulated to the 0.6 V (±2%) reference, with an absolute maximum of 6 V, and the feedback divider must connect directly and close to this pin, away from LX. |
| 4 | EN | input | Active-high enable with an enable threshold of 0.96 V and a shutdown threshold of 0.6 V, an absolute maximum of 6 V, and EN must be less than or equal to VCC. |
| 5 | VCC | power_in | IC power supply with a recommended range of 2.6 V to 5.5 V, an absolute maximum of 6 V, and an under-voltage lockout of 2.2 V (typ.). |
| 6 | OC | input | Adjustable current-limit pin where a resistor from OC to GND (19 kΩ to 96 kΩ) sets the peak switch current from 2.5 A down to 0.5 A, and no capacitance should be placed on this pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HX hengjiaxing |
| Package | SOT-23-6 |
| 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 |
|---|---|---|---|---|---|---|---|
| Supply Voltage | VCC | 0 | 6 | V | 3 | ||
| LX Voltage | VLX | 0 | 16 | V | 3 | ||
| EN,FB Voltage | 0 | 6 | V | 3 | |||
| Power Dissipation | PD | 455 | mW | SOT23-6L @TA=25°C | 3 | ||
| Junction Temperature | TJ | 150 | °C | 3 | |||
| Operating Temperature | TOP | -40 | 85 | °C | 3 | ||
| Storage Temperature | TST | -65 | 150 | °C | 3 | ||
| Lead Temperature (soldering, 10 sec) | 260 | °C | soldering, 10 sec | 3 | |||
| Supply Voltage | VIN | 2.6 | 5.5 | V | 4 | ||
| Operating Temperature Range | TA | -40 | 85 | °C | Ambient Temperature | 4 | |
| Input Supply Range | VCC | 2.6 | 5.5 | V | 4 | ||
| Operation Frequency | FOSC | 0.8 | 1 | 1.2 | MHZ | VFB=1.0V | 4 |
| Reference Voltage | VREF | 0.588 | 0.6 | 0.612 | V | 4 | |
| Adjustable OCP Current | IOCP | 0.5 | 2.5 | A | With External Resistor: 19k~96k | 4 | |
| Thermal Resistance (Note1) | θJA | 220 | °C / W | SOT23-6L; natural convection, TA=25°C, JEDEC 51-3 board | 3 | ||
| Under Voltage Lockout | VUVLO | 2.2 | V | 4 | |||
| UVLO Hysteresis | 0.1 | V | 4 | ||||
| Quiescent Current | ICC | 0.19 | mA | VFB=0.66V, No switching | 4 | ||
| Average Supply Current | ICC | 2.84 | mA | VFB=0.55V, Switching | 4 | ||
| Shutdown Supply Current | ICC | 0.1 | µA | VEN=GND | 4 | ||
| Frequency Change with Voltage | △ f / △ V | 5 | % | VCC=2.6V to 5.5V | 4 | ||
| Maximum Duty Cycle | TDUTY | 90 | % | 4 | |||
| Line Regulation | 0.2 | % / V | VCC=2.6V～5.5V | 4 | |||
| Enable Voltage | VEN | 0.96 | V | 4 | |||
| Shutdown Voltage | VEN | 0.6 | V | 4 | |||
| On Resistance of Driver | RDS(ON) | 0.2 | Ω | ILX=2A | 4 | ||
| OCP Current | IOCP | 2.5 | A | 4 | |||
| OTP Temperature | TOTP | 150 | °C | 4 |
CAD (KiCad official)
- Symbol:
HX6291 - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files:
hx6291-etched.step/hx6291-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);hx6291.step/hx6291.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HX hengjiaxing datasheet (9 pp, sha256
e3d44dc6eca4bfcb, retrieved 2026-10-17, 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).