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VPC2187B

Public Made by Adom

by adom

VPSC DC-DC Converters, MSOP-10. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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VPC2187B

VPSC · DC-DC Converters · MSOP-10

VPC2187B from VPSC, in a MSOP-10. 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 COM input Optocoupler feedback pin in SSR mode that sets peak current and switching frequency, with internal RC compensation for direct optocoupler connection; open-circuit voltage is 5.0-5.8V and the open-loop protection threshold is 4.6V (VDD-0.8V when VDD is below 5.4V).
2 VIN power_in High-voltage startup input that feeds the internal high-voltage LDO to VDD; absolute maximum VIN-to-GND is 110V and recommended VIN is 4-100V, with an ESD clamp of about 118V.
3 UVP input Input undervoltage protection pin with a 2V comparison threshold; an external pull-up sets the hysteresis, the pin sinks 4.4uA when protection is active, and it also enables or disables the internal LDO (enable above 0.9V, disable below 0.6V).
4 VDD power_in Chip supply pin regulated to 8.7V (up to 20mA) by the VIN LDO, clamped at 18.6V, and entering self-recovering protection when clamp sink current exceeds 6.6mA; absolute maximum is 25V.
5 GATE output Gate drive output for the external power MOSFET, with peak source current of 0.8A and peak sink current of 1.5A at VGATE=7.5V.
6 GND power_in Power reference ground pin for the chip.
7 CS input Current-sense input with a maximum current-limit threshold of 156mV for VPC2187B (500mV for VPC2188B), and short-circuit protection that latches into self-recovering protection when CS exceeds 1.6 times the maximum threshold.
8 RT passive Frequency programming pin where an external resistor to GND sets the oscillator frequency (for example 44.2kΩ gives 135-165kHz and 22kΩ gives 270-330kHz); RT reference voltage is 1.92-2.12V.
9 SS passive External soft-start pin where a capacitor to GND sets the soft-start time, charged by a 22-34uA source; if left open, the internal soft-start time is 0.8-1.6mS (1.2mS typical).
10 FB input Voltage feedback pin for PSR (auxiliary winding divider) or resistor-divider direct sampling, automatically selected when GATE is high and FB sees a negative voltage or COM is tied to GND; absolute maximum FB current is -2.5mA.

Key specifications

Parameter Value
Manufacturer VPSC
Package MSOP-10
Category Power Management (PMIC)
Pins 10

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 输入电压 (recommended) VIN 4 100 V 3
工作结温 (recommended) TJ -40 125 ℃ 3
VIN 对 GND 的电压范围 (absolute maximum) VIN -0.3 110 V 3
VDD 和 GATE 对 GND 的电压范围 (absolute maximum) VDD -0.3 25 V 3
CS 对 GND 电压范围 (absolute maximum) CS -0.3 1.25 V 3
所有其它引脚对 GND 的电压范围 (absolute maximum) -0.3 6.6 V 3
最大工作结温 TJMAX (absolute maximum) TJMAX 150 ℃ 3
VIN 钳位持续电流 (absolute maximum) IVIN(CLAMP) 1 mA 3
FB 电流 (absolute maximum) IFB -2.5 mA 3
VIN 钳位电压 ESD clamp VIN(clamp) 110 118 128 V IVIN=1mA，VDD=12V 3
正常工作电流 IQ IQ 2 3 mA GATE 悬空，COM接3.3k到GND 3
VIN 供电能力 IVIN(SRC) IVIN(SRC) 15 20 mA VIN=12V，VDD=6.5V 3
VDD 启动电压 VDD(ON) VPC2187B VDD(ON) 3.5 3.7 3.9 V VDD 电压上升 3
VDD 锁定电压 VDD(OFF) VPC2187B VDD(OFF) 3.2 3.4 3.6 V VDD 电压下降 3
VIN 到 VDD 的稳压值 VDD(REG) VDD(REG) 8.1 8.7 9.3 V VDD 和 GATE 不带负载 3
VDD 过压保护阈值电压 VDD(OVP) VDD(OVP) 17.5 18.6 19.7 V VDD 电压上升 4
VDD ESD 钳位电压 VDD(clamp) VDD(clamp) 23 27 V IVDD（SNK）=10mA 4
限流阈值电压 VCS(LIM) VPC2187B VCS(LIM) 140 156 172 mV 4
最小阈值电压 VCS(MIN) PSR 反馈模式 VPC2187B VCS(MIN) 26 31 36 mV PSR 反馈模式 4
短路保护阈值 VSCP(LIM) VPC2187B VSCP(LIM) 225 250 275 mV VCOM 超过 VCOM(OLP) 4
软启动引脚开路电压 VSS(OPEN) VSS(OPEN) 5 5.4 5.8 V CLK 悬空 (as printed) 4
内置软启动时间 tSS(IN) tSS(IN) 0.8 1.2 1.6 mS SS 悬空 4
外置软启动电流 ISS ISS 22 28 34 uA 4
RT=44.2kΩ 时的频率 FOSC1 FOSC1 135 150 165 kHz RT=44.2kΩ 4
RT=22kΩ 时的频率 FOSC2 FOSC2 270 300 330 kHz RT=22kΩ 4
RT=13.3kΩ 时的频率 FOSC3 FOSC3 440 500 560 kHz RT=13.3kΩ 4
RT 引脚基准电压 VRT VRT 1.92 2.02 2.12 V 4
欠压保护比较电压 VREF(UVP) VREF(UVP) 1.9 2 2.1 V 4
UVP 引脚被钳位电压 VUVP(CLAMP) VUVP(CLAMP) 5 5.5 6 V IUVP=0.6mA 注入 UVP 引脚 4
保护后抽取的下拉电流 IUVP(SNK) IUVP(SNK) 3.4 4.4 5.4 uA VUVP=1.8V 4
EA 正端口基准电压 VREF(REG) VREF(REG) 1.975 2 2.025 V 4
最大占空比 DMAX DMAX 75 80 85 % 5
COM 引脚开路电压 VCOM(OPEN) VCOM(OPEN) 5 5.4 5.8 V 5
COM 脚短路电流 ICOM ICOM 0.6 1.1 1.5 mA VCOM=0V 5
GATE 高电平压差 VGATEH (50mA 负载) VGATEH 185 400 mV IGATE=50mA 5
GATE 低电平电压 VGATEH (100mA 上拉) VGATEH 170 350 mV IGATE=-100mA 5
过温保护阈值 TSHDN TSHDN 148 163 178 ℃ 5
使能关断时输入电流 IVIN(SHDN) IVIN(SHDN) 0.1 uA VUVP=0V 3
输入欠压未关断时输入电流 IVIN(UVP) IVIN(UVP) 294 uA VUVP=1.8V 3
VIN 到 VDD 的跌落电压 VDD(DO) VDD(DO) 1.2 V IVDD(LOAD)=5mA,VIN=8V 3
防倒灌二极管耐压 VBV(DIODE) VBV(DIODE) 37 V 4
VDD 过压时吸收电流 IDDSNK(OVP) IDDSNK(OVP) 6.6 mA VDD= VDD（OVP） 4
电流限制比较延时 tCS(DLY) tCS(DLY) 40 nS CS 从 0 到 0.6V 开始计算，到 GATE 变为低电位 4
PWM 比较消隐时间 tLEB(CS) tLEB(CS) 95 nS 4
增加斜坡补偿起始占空比 D D 35 % 4
自恢复保护模式休眠时间 TSLEEP(SR) TSLEEP(SR) 800 mS 4
软启动泄放电阻 RSS(DIS) RSS(DIS) 300 Ω 4
EA 低频增益 AV AV 1400 V/V 4
FB 引脚输入电流 IFB (FB 作为反馈电压) IFB 40 nA FB 引脚作为反馈电压时 4
FB 引脚输入电流 IFB (COM 作为反馈电压) IFB -20 uA COM 引脚作为反馈电压时 4
采样延迟时间 TD(SAMP) TD(SAMP) 252 nS RT=22kΩ 4
COM 开环保护阈值电压 VCOM(OLP) VCOM(OLP) 4.6 V VDD≥5.4V 5
欠压保护使能关闭 LDO 阈值 VUVP(OFF) VUVP(OFF) 0.6 V VUVP 电压从高往低 5
GATE 输出峰值电流 IGATE(SRC) IGATE(SRC) 0.8 A VGATE=7.5V 5
GATE 抽取峰值电流 IGATE(SINK) IGATE(SINK) 1.5 A VGATE=7.5V 5
GATE 上升时间 tr tr 16 nS GATE 接 1nF 到 GND 5
GATE 下降时间 tf tf 8 nS GATE 接 1nF 到 GND 5
过温保护回差 TSHDN(HYS) TSHDN(HYS) 18 ℃ 5

CAD (KiCad official)

  • Symbol: VPC2187B
  • Footprint: Package_SO:MSOP-10_3x3mm_P0.5mm
  • 3D model: MSOP-10 (KiCad packages3D, STEP)
  • 3D model files: vpc2187b-etched.step / vpc2187b-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); vpc2187b.step / vpc2187b.glb are the bare package body.

Provenance

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

  • Datasheet: VPSC datasheet (15 pp, sha256 602d834347f7366b, retrieved 2026-10-09, 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