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TP8305B-SOT236

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TOPPOWER Nanjing Extension Microelectronics DC-DC Converters, SOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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TP8305B-SOT236

TOPPOWER Nanjing Extension Microelectronics · DC-DC Converters · SOT-23-6

TP8305B-SOT236 from TOPPOWER Nanjing Extension Microelectronics, in a SOT-23-6. 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 EXT output Drives the external NMOS switch gate, so the part can switch high-power loads; datasheet gives pull-up current 53 mA min (VDD=2V, VOH=1.6V) and pull-down current 160 mA min (VDD=2V, VOL=0.4V).
2 GND power_in Ground pin for the device.
3 VDD power_in Supply input, operating range 0.8V to 5.5V, with internal overvoltage protection that stops the oscillator when VDD exceeds 5.8V (5.6V to 6.2V).
4 CE input Enable input: the chip runs when CE is above 0.75V and shuts down below 0.75V, and can be PWM-driven with a 500 Hz to 1 kHz, 3 V to 4 V pulse signal for LED dimming.
5 FB input Constant-current sense input referenced to an internal 46 mV reference (43.7 mV to 48.3 mV), with constant current set as VFB/Rf between FB and GND.
6 IS input Peak-current limit sense input referenced to an internal 50 mV reference (47 mV to 53 mV), with the input current limit set as VIS/RS between IS and GND.

Key specifications

Parameter Value
Manufacturer TOPPOWER Nanjing Extension Microelectronics
Package SOT-23-6
Category Power Management (PMIC)
Pins 6

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Voltage on VDD, CE, FB, IS, EXT -0.3 10 V 6
工作结温度范围 (Operating junction temperature range) -35 160 ℃ 6
存储温度 (Storage temperature) -65 125 ℃ 6
焊接温度 (Soldering temperature) 260 ℃ 10s 6
输入电压 (Input voltage) VIN 0.8 5.5 V 方案 3 电路 6
VDD 过压保护 (VDD overvoltage protection) VOVP 5.6 5.8 6.2 V 6
反馈电压 (Feedback voltage) VFB 43.7 46 48.3 mV 6
峰值电流采样电压 (Peak current sense voltage) VIS 47 50 53 mV 6
CE 开关电压 (CE switching voltage) VCE 0.55 0.75 0.95 V 图 6 电路，VIN=2.5V，FB 接地 7
保持电压 (Hold voltage) VHOLD 0.35 V 方案 3 电路，对应负载电流 10mA 6
启动电压 (Start-up voltage) VSTART 1 V 方案 3 电路 6
温度保护 (Thermal protection threshold) TOV 130 ℃ 6
工作频率 (Operating frequency) FOSC 700 KHz 6
限流模式 关断时间 (Current-limit mode off time) toff 450 nS 限流模式 6
EXT 上拉电流 (EXT pull-up current) IEXTP 53 mA VDD=2V，VOH=1.6V 6
EXT 下拉电流 (EXT pull-down current) IEXTN 160 mA VDD=2V，VOL=0.4V 6
静态电流 (Quiescent current) IQ 76 μA 图 6 电路，Vin=CE=5.2V，VFB=0.5V 7
关断电流 (Shutdown current) IQ 1 uA 关断模式（CE 输入低电平） 7
效率 (Efficiency) η 90 % 方案 3 电路 7

CAD (KiCad official)

  • Symbol: TP8305B-SOT236
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-23-6 (KiCad packages3D, STEP)
  • 3D model files: tp8305b-sot236-etched.step / tp8305b-sot236-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tp8305b-sot236.step / tp8305b-sot236.glb are the bare package body.

Provenance

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

  • Datasheet: TOPPOWER Nanjing Extension Microelectronics datasheet (18 pp, sha256 39097b0f4deb8980, retrieved 2026-10-19, 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