component
SM5402
Public Made by Adomby adom
HICHON Battery Management ICs, ESOP-8. 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
markdownSM5402
HICHON · Battery Management ICs · ESOP-8
SM5402 from HICHON, 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 | L1 | output | LED indicator 1 drive pin for charge and discharge status; the datasheet states that leaving LED1 unconnected selects single-LED mode and absolute maximum voltage is -0.3V to 5.5V. |
| 2 | L2 | output | LED indicator 2 drive pin for charge and discharge status, with absolute maximum voltage of -0.3V to 5.5V. |
| 3 | BTP | power_in | Battery terminal connected to the lithium cell, with absolute maximum voltage of -0.3V to 5.5V and a battery voltage range of 2.95V to 4.4V in the electrical characteristics. |
| 4 | VOUT | input | Output voltage feedback pin for the boost converter, with absolute maximum voltage of -0.3V to 5.5V; the boost output is fixed at 5.1V (typ) with overvoltage protection at 5.8V. |
| 5 | VO/IN | bidirectional | Shared output/input port used for USB charging input (4.5V to 5.5V) and boost output, with a stated working range of 0.5V to 5V and absolute maximum of -0.3V to 5.5V. |
| 6 | LX | passive | Inductor connection for the synchronous boost converter, with absolute maximum voltage of -0.3V to 5.5V; the typical application circuit uses a 4.7uH inductor. |
| 7 | PGND | power_in | Power ground for the boost and charger power stage, with absolute maximum rating of -0.3V to 5.5V relative to GND. |
| 8 | AGND | power_in | Analog ground for the control circuitry, with absolute maximum rating of -0.3V to 5.5V relative to GND. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HICHON |
| Package | ESOP-8 |
| Category | Power Supply Chip |
| 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 |
|---|---|---|---|---|---|---|---|
| VIN input voltage range | VIN | 4.5 | 5 | 5.5 | V | 4 | |
| Battery voltage (Vbat) | Vbat | 2.95 | 4.4 | V | 4 | ||
| Float (constant-voltage) threshold | Vfloat | 4.158 | 4.2 | 4.242 | V | 4 | |
| Boost system output voltage | VO | 4.95 | 5.1 | 5.25 | V | 4 | |
| Maximum voltage on VO/IN, L1, L2, BTP, VOUT, LX, PGND, AGND | VO/IN, L1, L2, BTP, VOUT, LX, PGND, AGND | -0.3 | 5.5 | V | 2 | ||
| Operating junction temperature | TJ | -40 | 125 | degC | 2 | ||
| Storage temperature | TSTG | -40 | 150 | degC | 2 | ||
| Operating ambient temperature | TA | -40 | 70 | degC | 2 | ||
| Quiescent current | Iq | 13 | uA | BAT=3.6V | 4 | ||
| Charging current | Ichg | 1 | A | VIN=4.75-5.25V | 4 | ||
| Output current | IOUT | 1 | A | BAT=3.6V, Vout>4.8V | 4 | ||
| Trickle-to-constant-current transition voltage | VTRKL | 2.8 | V | VBAT rising (从低到高) | 4 | ||
| Trickle charge hysteresis voltage | VTRHYS | 100 | mV | 4 | |||
| Recharge threshold voltage | VRECHG | 4.1 | V | 4 | |||
| VIN power-down monitor threshold, VIN rising | 250 | mV | VIN rising, Vin>BAT | 4 | |||
| VIN power-down monitor threshold, VIN falling | 50 | mV | VIN falling, Vin>BAT | 4 | |||
| Output overvoltage protection | VOVP | 5.8 | V | 4 | |||
| Output overvoltage protection release | VOVP_DIS | 5.4 | V | 4 | |||
| Boost undervoltage lockout | VUVLO | 2.95 | V | BAT falling (由高到低) | 4 | ||
| Boost undervoltage lockout recovery | VUVLO_R | 3.2 | V | BAT rising (由低到高) | 4 | ||
| Battery supply current, no switching | IBAT1 | 0.2 | mA | Vout=5.5V, No switching | 4 | ||
| Battery supply current, switching | IBAT2 | 1 | mA | Vout=4.5V, switching | 4 | ||
| Auto-shutdown load current | Iauto_off | 60 | mA | BAT=3.6V, Cout=20uF | 4 | ||
| Operating frequency | FOSC | 1 | MHz | 4 | |||
| Over-temperature protection threshold | OTP | 150 | degC | 4 | |||
| Over-temperature protection hysteresis | OTP_HYS | 20 | degC | 4 |
CAD (KiCad official)
- Symbol:
SM5402 - Footprint:
Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm - 3D model: ESOP-8 (KiCad packages3D, STEP)
- 3D model files:
sm5402-etched.step/sm5402-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sm5402.step/sm5402.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HICHON datasheet (7 pp, sha256
0523657553876694, retrieved 2026-10-21, 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-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).