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LP7812CQVF

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LOWPOWER Battery Management, QFN-16-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LP7812CQVF

LOWPOWER · Battery Management · QFN-16-EP(3x3)

LP7812CQVF from LOWPOWER, in a QFN-16-EP(3x3). 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 USB input pin; a surface-mount decoupling capacitor of at least 1uF should be placed close to it, and the input is rated up to 28V.
2 ISET passive Charge current setting pin; the constant-charge current is set by an external RISET resistor, ICC = 480/RISET (A), with a recommended range of 100mA to 800mA.
3 CTRL input Control pin: high selects earphone charging mode, low selects communication mode, and floating selects earphone insertion detection mode.
4 DATA output Data output from the LP7812C to the MCU via a private single-wire protocol; an external pull-up resistor is required.
5 RX input Bidirectional communication receive pin for earphone signals; an external pull-up resistor is required.
6 COMM bidirectional Multiplexed pin: in communication mode it sends signals to VOL/VOR, and in charging mode an external resistor RCOMM sets the earphone charge current.
7 NTC input NTC detection pin used to sense battery temperature for charge and discharge temperature management.
8 NTCS output NTC bias voltage output pin.
9 VOR output Right earphone output pin, used for earphone charging, insertion detection and communication.
10 VOL output Left earphone output pin, used for earphone charging, insertion detection and communication.
11 PMID power_out Boost converter output pin; the default output voltage is 5.1V and a filter capacitor of at least 10uF is required.
12 SW output Boost converter switching pin; absolute maximum rating is -2V to 8.5V for 5ns.
13 GND power_in Power ground pin for the boost converter.
14 NC unconnected No connection; leave floating.
15 BAT power_in Battery pin for linear charging; a surface-mount decoupling capacitor of at least 1uF should be placed close to it.
16 NC unconnected No connection; leave floating.
17 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer LOWPOWER
Package QFN-16-EP(3x3)
Category Power Management (PMIC)
Pins 17

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 to GND VIN -0.3 28 V 4
Others to GND -0.3 6.5 V 4
SW to GND (5ns) -2 8.5 V 5ns 4
环境温度 (TA) TA -40 85 °C 4
推荐工作条件 VIN 输入电压 VIN 4 6 V 4
推荐工作条件 IIN 输入电流 IIN 1 A 4
推荐工作条件 TA 环境温度范围 TA -40 85 °C 4
VINUVLO 欠压保护电压 VINUVLO 3.6 3.8 4 V VIN下降沿阈值 4
VIN_OVP 过压保护电压 VIN_OVP 6 6.2 6.55 V VIN上升沿阈值 4
VCV 浮充电压 VCV -0.5 0.5 % 0°C to 60°C 5
VTRK 涓流充电阈值 VTRK 2.75 2.8 2.85 V BAT 上升沿阈值 5
ICC 恒流充电电流 ICC 378 420 462 mA -10°C to 85°C 5
ICC 充电电流 25°C ICC 400 420 440 mA 25°C 5
ICC 50% 充电电流 ICC 185 210 235 mA ICC=420mA, 50%ICC 5
ITRK 涓流充电电流 ITRK 28 42 57 mA ICC=420mA， RISET=1.15k， 10% 5
ITERM 充电截止电流 ITERM 28 42 57 mA ICC=420mA, 10%ICC 5
VPMID 输出电压精度 25°C，LP7812CQVF VPMID 5.04 5.1 5.16 V 25°C，LP7812CQVF 5
T-10 -10°C检测阈值 下降沿 T-10 84 85 86 % Temperature falling edge threshold 5
T0 0°C检测阈值 下降沿 T0 75.5 76.5 77.6 % Temperature falling edge threshold 5
T10 10°C检测阈值 下降沿 T10 66 66.8 67.5 % Temperature falling edge threshold 5
T45 45°C检测阈值 上升沿 T45 29 30 31 % Temperature rising edge threshold 6
T60 60°C检测阈值 上升沿 T60 19 20 21 % Temperature rising edge threshold 6
EICC 耳机放电限流 EICC 90 100 110 mA RCOMM=500k,25°C 6
EEOC 耳机充电截止检测电流阈值 EEOC 3 4 5 mA PMID=5.1V 6
VBATUV 耳机充电欠压保护电压 VBATUV 3.3 V BAT下降阈值 6
VBATUV_H BAT上升阈值 VBATUV_H 3.5 V 6
IPUP 耳机待机上拉电流 IPUP 1 2 3 uA BAT=3.6V, 25°C 6
VH 输入高电平 VH 2 V 6
VL 输入低电平 VL 0.4 V 6
最高芯片结温 (TJ) TJ 150 °C 4
最高焊接温度 260 °C at leads, 10 sec 4
HBM 人体模型 ESD等级 4 kV Human Body Model 4
CDM 充电器件模型 ESD等级 500 V Charged Device Model 4
θJA 结到环境热阻 θJA 60 ℃/W 4
VINUVLO_H 欠压保护迟滞电压 VINUVLO_H 150 mV VIN 上升沿阈值 4
VOVP_H 过压保护迟滞电压 VOVP_H 150 mV VIN下降沿阈值 4
IIN 输入静态电流 IIN 150 uA VIN=5.0V，BAT=4.3V 4
VIN_DPM 输入动态电压调整阈值 VIN_DPM 4.4 V 4
VBAT_POR 电池上电复位电压 VBAT_POR 2.6 V VIN=0V, BAT 上升沿阈值 4
VPOR_H 上电复位迟滞电压 VPOR_H 0.18 V BAT 下降沿阈值 5
IBAT 电池静态电流 IBAT 7 uA 待机模式，BAT=3.8V,VIN=0V 5
VTRK_H 涓流充电迟滞电压 VTRK_H 100 mV 5
VRECH 复充电压 VRECH 4.05 V BAT 下降沿阈值，CV=4.2V 5
充电温度保护阈值 Tj 100 120 140 °C Tj, Note 2 non-production data 5
Rds,on_HS 上管导通阻抗 Rds,on_HS 350 mΩ PMID=5.1V 5
Rds,on_LS 下管导通阻抗 Rds,on_LS 250 mΩ PMID=5.1V 5
fsw 开关频率 fsw 1.2 MHz PMID=5.1V, Note 2 5
Ilim 峰值限流电流 Ilim 1.3 A BAT=3.6V 5
VPMID_SCP PMID 短路保护阈值 VPMID_SCP -0.5 V BAT=3.6V, 相对于BAT 5
Rds,on_EAR 耳机放电管导通阻抗 Rds,on_EAR 800 mΩ PMID=5.1V 6
tdEEOC 耳机EEOC消抖时间 tdEEOC 400 ms Note 2 6
VINSERT 耳机入仓检测阈值 VINSERT -0.7 V VIN浮空, BAT=3.8V,BST_EN=0, 相对于BAT 6
tdINSERT 入仓消抖时间 tdINSERT 30 ms Note 2 6
Isink 下拉驱动能力 Isink 5 mA BAT=3.8V，VDS=0.4V 6
Ileak 引脚漏电 Ileak 0.1 uA 6
T-10 滞回 T-10 2 % Hysteresis 5
T0 滞回 T0 2 % Hysteresis 5
T10 滞回 T10 2 % Hysteresis 5
T45 滞回 T45 2 % Hysteresis 6
T60 滞回 T60 2 % Hysteresis 6

CAD (KiCad official)

  • Symbol: LP7812CQVF
  • Footprint: Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm
  • 3D model: QFN-16-EP(3x3) (KiCad packages3D, STEP)
  • 3D model files: lp7812cqvf-etched.step / lp7812cqvf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lp7812cqvf.step / lp7812cqvf.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: LOWPOWER datasheet (21 pp, sha256 4eb1a33340defcb5, retrieved 2026-10-27, 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, 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