component
HE4054B
Public Made by Adomby adom
HEERMICR Battery Management ICs, SOT-23-5. 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
markdownHE4054B
HEERMICR · Battery Management ICs · SOT-23-5
HE4054B from HEERMICR, in a SOT-23-5. 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 | CHRG | output | Open-drain charge status output pulled low by an internal N-channel MOSFET while charging, high-impedance when charging is complete or in undervoltage lockout. |
| 2 | GND | power_in | Ground. |
| 3 | BAT | power_out | Charge current output to the battery that regulates the final float voltage to 4.2V, with reverse-battery protection drawing about 0.7mA between GND and BAT. |
| 4 | VCC | power_in | Positive supply input from 4.25V to 6.5V that requires a bypass capacitor of at least 1µF, entering shutdown when VCC is within 30mV of BAT. |
| 5 | PROG | bidirectional | Charge current program, monitor and shutdown pin set by a 1% resistor to ground (IBAT = VPROG/RPROG x 1000) with 1V in constant-current mode, shutdown above 1.21V and clamp voltage of about 2.4V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HEERMICR |
| Package | SOT-23-5 |
| Category | Power Management ICs |
| Pins | 5 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input voltage | VCC | 4.2 | 6.5 | V | 8 | ||
| Input current, charge mode | ICC | 240 | 500 | μA | 充电模式 RPROG=10KΩ | 8 | |
| Input current, standby mode | ICC | 45 | 90 | μA | 待机模式 | 8 | |
| Input current, shutdown mode | ICC | 25 | 50 | μA | 关断模式 RPROG不接，VCC<VBAT 或VCC<VUV | 8 | |
| Output float voltage | VFLOAT | 4.158 | 4.2 | 4.242 | V | 0℃<Ta<85℃ | 8 |
| BAT current, constant current mode | IBAT | 93 | 100 | 107 | mA | RPROG=10K，恒流模式 | 8 |
| BAT current, constant current mode | IBAT | 465 | 500 | 535 | mA | RPROG=2K，恒流模式 | 8 |
| BAT current, standby mode | IBAT | 0 | -2.5 | -6 | μA | VBAT=4.2V，待机模式 | 8 |
| BAT current, shutdown mode | IBAT | 1 | 2 | μA | 关断模式 | 8 | |
| BAT current, sleep mode | IBAT | 0 | 1 | μA | VCC=0V，睡眠模式 | 8 | |
| Trickle charge current | ITRIKL | 40 | 50 | 60 | mA | VBAT<VTRIKL，RPROG=2K | 8 |
| Trickle charge threshold voltage | VTRIKL | 2.7 | 2.9 | 3.1 | V | RPROG=10K，VBAT上升 | 8 |
| Trickle charge hysteresis voltage | VTRHYS | 60 | 80 | 110 | mV | RPROG=10K | 8 |
| UVLO threshold voltage | VUV | 3.6 | 3.8 | 4 | V | VCC从低升高 | 8 |
| UVLO hysteresis | VUVHYS | 150 | 200 | 300 | mV | 8 | |
| Manual shutdown threshold | VMSD | 1.15 | 1.21 | 1.3 | V | PROG脚上升 | 8 |
| Manual shutdown threshold | VMSD | 0.9 | 1 | 1.1 | V | PROG脚上升 | 8 |
| VCC-VBAT shutdown threshold | VASD | 70 | 100 | 140 | mV | VCC从低到高 | 8 |
| VCC-VBAT shutdown threshold | VASD | 5 | 30 | 50 | mV | VCC从高到低 | 8 |
| C/10 termination threshold current | ITERM | 0.085 | 0.1 | 0.115 | mA/mA | RPROG=10K | 8 |
| PROG pin voltage | VPROG | 0.93 | 1 | 1.07 | V | RPROG=10K，电流模式 | 8 |
| CHRG pin output low voltage | VCHRG | 0.35 | 0.6 | V | ICHRG=5mA | 8 | |
| Recharge hysteresis voltage | ΔVRECG | 100 | 200 | mV | VFLOAT-VRECHRG | 8 | |
| Charge comparator filter time | tRECHG | 0.8 | 1.8 | 4 | mS | VBAT从高到低 | 8 |
| Termination comparator filter time | tTERM | 0.63 | 1.4 | 3 | mS | IBAT跌至ICHG / 10以下 | 8 |
| PROG pull-up current | IPROG | 2 | μA | 8 | |||
| Input voltage | VCC | -0.3 | 7 | V | relative to Vss | 7 | |
| PROG pin voltage | VPROG | -0.3 | 0.3 | V | relative to Vss | 7 | |
| BAT pin voltage | VBAT | -0.3 | 7 | V | relative to Vss | 7 | |
| CHRG pin voltage | VCHRG | -0.3 | 10 | V | relative to Vss | 7 | |
| Power dissipation | PDMAX | 250 | mW | 7 | |||
| BAT pin current | IBAT | 500 | mA | 7 | |||
| PROG pin current | IPROG | 800 | μA | 7 | |||
| Human body model ESD | VESD | 4 | kV | 7 | |||
| Latch-up current | Latch-Up | 400 | mA | 7 | |||
| Operating ambient temperature | TOPA | -40 | 85 | ℃ | 7 | ||
| Storage temperature | TSTR | -65 | 125 | ℃ | 7 |
CAD (KiCad official)
- Symbol:
HE4054B - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
he4054b-etched.step/he4054b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);he4054b.step/he4054b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HEERMICR datasheet (11 pp, sha256
f39009cae08f9466, retrieved 2026-10-23, 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).