# LM536003QDSXRQ1

**Texas Instruments** · DC-DC Converters · WSON-10-EP(3x3)

LM536003QDSXRQ1 from Texas Instruments, in a WSON-10-EP(3x3). 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 | SW | tri_state | Regulator switch node connected to output inductor; driven high by high-side FET and pulled low by low-side FET. |
| 2 | BOOT | power_in | High side gate driver upper supply rail; connect 100-nF capacitor from SW to BOOT; internal diode charges capacitor when SW node is low. |
| 3 | VCC | power_out | Internal 3-V regulator output used as supply to internal control circuits; connect 1.0-μF high-quality capacitor from this pin to AGND. |
| 4 | FB | power_in | Fixed version feedback pin for output voltage and power source for VCC regulator; connect to output node and place 10-nF bypass capacitor immediately adjacent. |
| 5 | AGND | power_in | Fixed version signal and feedback ground to which input signals and FB are compared. |
| 6 | RESET | output | Open drain reset output; high = regulator OK, low = regulator fault; goes low when EN pin is low; connect through current-limiting pull-up resistor to suitable voltage supply. |
| 7 | EN | input | Enable input to regulator; high = on, low = off; can be connected to Vin; do not float. |
| 8 | VIN | power_in | Input supply to regulator operating from 3.8V to 36V; connect input bypass capacitors directly between this pin and GND. |
| 9 | SYNC/MODE | input | Multifunction mode control input tolerant of voltages up to input voltage; with valid synchronization signal enables forced PWM mode at external clock frequency; with high enforces PWM mode; with low enables AUTO mode with diode emulation at light load; do not float. |
| 10 | GND | power_in | Power and signal ground connection; bypass to VIN immediately adjacent to this pin. |
| 11 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | WSON-10-EP(3x3) |
| Category | Power Management (PMIC) |
| Pins | 11 |

## CAD (KiCad official)

- Symbol: `LM536003QDSXRQ1`
- Footprint: `Package_SON:VSON-10-1EP_3x3mm_P0.5mm_EP1.2x2mm`
- 3D model: WSON-10-EP(3x3) (KiCad packages3D, STEP)
- 3D model files: `lm536003qdsxrq1-etched.step` / `lm536003qdsxrq1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm536003qdsxrq1.step` / `lm536003qdsxrq1.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/lm53601-q1) (51 pp, sha256 `d174c97c59a34282`, retrieved 2026-10-03, 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-4-5-20251001` (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](docs/lm536003qdsxrq1-datasheet.pdf)