component

SD3038B

Public Made by Adom

by adom

SHOUDING LED Drivers, SOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Contents

README

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SD3038B

SHOUDING · LED Drivers · SOT-23-6

SD3038B from SHOUDING, 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 gate of the external NMOS switch, which allows the converter to supply high-power loads.
2 GND power_in Ground connection for the device.
3 VDD power_in Supply input with internal overvoltage protection that shuts down the oscillator when VDD exceeds 5.8V (VOVP 5.6-6.2V), and the datasheet lists input voltage 0.8-5.5V.
4 CE input Enable pin where the chip runs above 0.75V and enters shutdown below 0.75V, and it can accept a 100Hz-8kHz rectangular signal of about 3-4V amplitude for PWM LED dimming.
5 FB input Constant-current sense input that uses the internal 46mV reference (43.7-48.3mV) to set the LED current as VFB/Rf.
6 IS input Current-limit sense input that limits the peak input current using the internal 50mV reference (47-53mV), with the limit set as VIS/RS.

Key specifications

Parameter Value
Manufacturer SHOUDING
Package SOT-23-6
Category LED Drivers
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 (absolute maximum) VDD, CE, FB, IS, EXT -0.3 10 V 5
Operating junction temperature range -35 160 ℃ 5
Storage temperature -65 125 ℃ 5
Soldering temperature 260 ℃ 10s 5
Input voltage VIN 0.8 5.5 V 方案 3 电路 5
Hold voltage VHOLD 0.35 V 方案 3 电路 对应负载电流 10mA 5
Start-up voltage VSTART 1 V 方案 3 电路 5
VDD overvoltage protection VOVP 5.6 5.8 6.2 V 5
Feedback voltage VFB 43.7 46 48.3 mV 5
Peak current sense voltage VIS 47 50 53 mV 5
CE switching voltage VCE 0.55 0.75 0.95 V 图 6 电路，VIN=2.5V，FB 接地 5
Quiescent current IQ 76 μA 图 6 电路，Vin=CE=5.2V，VFB=0.5V 5
Shutdown current (CE input low) IQ 1 uA 关断模式（CE 输入低电平） 5
Operating frequency FOSC 700 KHz 5
Off time in current-limit mode toff 450 nS 限流模式 5
EXT pull-up current IEXTP 53 mA VDD=2V，VOH=1.6V 5
EXT pull-down current IEXTN 160 mA VDD=2V，VOL=0.4V 5
Over-temperature protection TOV 130 ℃ 5
Efficiency η 90 % 方案 3 电路 5

CAD (KiCad official)

  • Symbol: SD3038B
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-23-6 (KiCad packages3D, STEP)
  • 3D model files: sd3038b-etched.step / sd3038b-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sd3038b.step / sd3038b.glb are the bare package body.

Provenance

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

  • Datasheet: SHOUDING datasheet (14 pp, sha256 f0a5065702bae191, 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