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VPC2845

Public Made by Adom

by adom

VPSC DC-DC Converters, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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VPC2845

VPSC · DC-DC Converters · SOP-8

VPC2845 from VPSC, in a SOP-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 COMP output Error amplifier compensation pin: external compensation components connect here to shape the error amplifier output, and the amplifier is internally current-limited so forcing COMP to GND gives zero duty cycle.
2 FB input Inverting input of the internal error amplifier used for the voltage feedback loop, where the FB lead should be kept short and stray capacitance minimized for stability.
3 CS input Primary-side current sense input to the PWM comparator that terminates OUT conduction, with a typical comparator threshold VCS_th of 1 V and an optional voltage ramp for voltage-mode operation.
4 RT/CT passive Oscillator timing pin: timing resistor RT connects from VREF and timing capacitor CT connects to GND, giving fOSC = 1.6/(RT x CT), and RT must not be less than 5 kΩ.
5 GND power_in Analog and signal ground, which also serves as power ground on packages without a separate PGND; keep the signal return path separate from the high-current gate-driver return path.
6 OUT output Push-pull gate drive output for the external MOSFET that sources and sinks up to 1 A peak and is held low while VDD is below the turn-on threshold.
7 VDD power_in Controller bias supply input, which should stay below the 28 V maximum recommended operating voltage (30 V absolute maximum) and be bypassed with a typical 0.1 µF capacitor placed directly at the pin.
8 VREF power_out 5 V reference output that requires a minimum 0.1 µF ceramic bypass capacitor placed as close to the pin as possible, with an additional bypass capacitor needed if other external loads are connected.

Key specifications

Parameter Value
Manufacturer VPSC
Package SOP-8
Category Power Management (PMIC)
Pins 8

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
输入电压 VDD (absolute maximum) VDD 30 V 3
输入电流 VDD VDD 30 mA 3
输出峰值电流 OUT -1 1 A 3
模拟引脚对 GND (COMP、CS、FB、RT/CT) COMP, CS, FB, RT/CT -0.3 6 V 3
基准电压对 GND VREF 6.6 V 3
输出引脚对 GND OUT -0.3 30 V 3
误差放大器输出吸入电流 COMP 15 mA 3
最大工作结温 TJMAX 150 ℃ 3
ESD 人体模式 HBM V(ESD) -3000 3000 V per ESDA/JEDEC JS-001-2017 3
ESD 机器模式 CDM V(ESD) -1000 1000 V per ESDA/JEDEC JS-002-2014 3
输入电压 VDD (recommended) VVDD 28 V 3
FB 基准电压 VFB 2.5 V 3
电流采样输入 VCS 1 V 3
电源电流 IVDD 25 mA 3
输出平均电流 IOUT 200 mA 3
基准电源输出电流 IVREF -20 mA 3
振荡器频率 fOSC 1 MHz 3
工作温度 (VPC284x) TA -40 105 ℃ VPC284x family range, applies to VPC2845 3
基准电压 VREF VREF 4.9 5 5.1 V IVREF = 1 mA, TJ = 25°C 4
线性调整 ΔVREF 2 20 mV 12≤VDD≤25V 4
负载调整 ΔVREF 3 25 mV 1mA≤IVREF≤20mA 4
温度系数 ΔVREF/ΔT 0.2 0.4 mV/℃ 4
输出总变化 VREF 4.82 5.18 V 线性、负载、温度 4
长期稳定性 VREF 5 25 mV 1000 小时，TA= 125°C 4
短路电流 ISC -30 -50 -70 mA 4
频率 fOSC 49 52 55 kHz TA=25℃，RT=10kΩ，CT=3.3nF 4
频率 fOSC 225 250 275 kHz TA=25℃，RT=6.2kΩ，CT=1.0nF 4
随电压的变化 ΔfOSC/ΔV 0.2 1 % 12V≤VDD≤25V 4
随温度的变化 ΔfOSC/ΔT 1 2.5 % -40℃≤TA≤125℃ 4
RT/CT 下拉电流 Idischarge 7.8 8.3 8.8 mA TJ = 25°C 4
RT/CT 下拉电流 Idischarge 7.6 9 mA -40℃≤TA≤125℃ 4
FB 基准电压 VFB 2.475 2.5 2.525 V VCOMP=2.5V, TA=25℃ 4
输入偏置电流 IFB -0.1 -1 uA VFB=5V 4
开环增益 AVOL 70 95 dB 2V≤VO≤4V 4
单位增益带宽 BW 0.7 1 MHz TJ = 25°C 4
电源信噪比 PSRR 60 70 dB 12V≤VDD≤25V 4
输入电流 (SNK) ICOMP(SNK) 2 10 mA VFB=2.7V，VFB=1.1V 4
输出电流 (SRC) ICOMP(SRC) -0.5 -1 mA VFB=2.3V，VFB=5V 4
VOUT 高电平 VOH 5.4 6 6.6 V VFB=2.3V，RCOMP=15kΩ到地 4
VOUT 低电平 VOL 0.1 0.5 V VFB=2.7V，RCOMP=15kΩ到 8 脚 4
ACS 增益 ACS 2.85 3 3.15 V/V 5
最大比较阈值电压 VCS_th 0.9 1 1.1 V VFB＜2.4V 5
输入偏置电流 ICS -0.1 -2 uA 5
从 CS 到 OUT 的延迟 tD 30 65 nS VCS 从 0 跳变至 2V 5
输出低电平时的内阻 RDSON(OL) 4 10 Ω ISINK=200mA 5
输出高电平时的内阻 RDSON(OH) 8 16 Ω ISOURCE=200mA 5
VDD 欠压锁定时下拉电流 IOUT(SNK) 100 300 mA VDD=6V，VOUT=1V 5
上升时间 tr 30 55 nS TJ=25℃，CL=1nF 5
下降时间 tf 20 40 nS TJ=25℃，CL=1nF 5
启动阈值电压 VPCx843/VPCx845 VDD(ON) 7.9 8.5 9.1 V 5
欠压锁定阈值电压 VPCx843/VPCx845 VDD(OFF) 7.1 7.7 8.3 V 5
最大占空比 VPCx844/VPCx845 DMAX 47 48 50 % 5
最小占空比 DMIN 0 0 % 5
启动电流 IST 50 100 uA VDD= VDD(ON)-0.5V 5
静态工作电流 IVDD 2.7 3.5 mA VFB=VCS=0V ，VDD=VDD(ON)+0.5V 5
静态工作电流 (VDD=25V) IVDD 8 14 17 mA VFB=VCS=0V，VDD=25V 5
钳位电压 VDD(clamp) 30 34 V IVDD=25mA 5

CAD (KiCad official)

  • Symbol: VPC2845
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: vpc2845-etched.step / vpc2845-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); vpc2845.step / vpc2845.glb are the bare package body.

Provenance

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

  • Datasheet: VPSC datasheet (15 pp, sha256 a3f0b7c9be78a5be, retrieved 2026-10-15, 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