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LM74502DDFR

Public Made by Adom

by adom

Texas Instruments Power Distribution Switches, TSOT-23-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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docs lm74502ddfr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
viewers lm74502ddfr: viewers · Ray 1mo ago
lm74502ddfr-etched.fit.json lm74502ddfr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
lm74502ddfr-etched.glb lm74502ddfr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
lm74502ddfr-etched.step lm74502ddfr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
lm74502ddfr.glb Publish 0.1.0 · Ray 1mo ago
lm74502ddfr.kicad_mod Publish 0.1.0 · Ray 1mo ago
lm74502ddfr.kicad_sym Publish 0.1.0 · Ray 1mo ago
lm74502ddfr.lbr Publish 0.1.0 · Ray 1mo ago
lm74502ddfr.step Publish 0.1.0 · Ray 1mo ago
package.json lm74502ddfr: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 1mo ago
page.json lm74502ddfr: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 1mo ago
README.md Initial commit: component/lm74502ddfr · Ray 1mo ago

LM74502DDFR

Texas Instruments · Power Distribution Switches · TSOT-23-8

LM74502DDFR from Texas Instruments, in a TSOT-23-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 EN/UVLO input Enable/UVLO input; voltage above 1.24V (typical rising threshold) enables gate driver and charge pump; pulling below 0.64V (typical) enters low-IQ shutdown mode drawing 1µA.
2 GND power_in Ground reference pin.
3 N.C unconnected No connection pin.
4 VCAP output Charge pump output for external gate drive; connect 0.1-0.22µF external capacitor; provides approximately 13V above VS with hysteresis between 11.6V and 12.4V.
5 VS power_in Input power supply to controller; operates 3.2V to 65V with 3.9V power-on-reset rising threshold and -65V reverse voltage withstanding; requires 100nF bypass capacitor to GND.
6 GATE output Gate drive output for external N-channel MOSFET; 60µA peak source current (LM74502) or 11mA (LM74502H), 2.37A peak sink current, 0-15V gate-to-source voltage rating.
7 OV input Overvoltage protection threshold input; connect resistor divider from input supply to OV to ground to set threshold; rising comparator reference 1.25V, falling reference 1.14V.
8 SRC input Source reference point for external back-to-back N-channel MOSFETs or high-side MOSFET source; withstands -65V to +65V voltage excursions for reverse polarity protection.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package TSOT-23-8
Category Power Management (PMIC)
Pins 8

CAD (KiCad official)

  • Symbol: LM74502DDFR
  • Footprint: Package_TO_SOT_SMD:TSOT-23-8
  • 3D model: TSOT-23-8 (KiCad packages3D, STEP)
  • 3D model files: lm74502ddfr-etched.step / lm74502ddfr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm74502ddfr.step / lm74502ddfr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (30 pp, sha256 32a78dac63f4406b, retrieved 2026-09-18, 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 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-4-6 (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