component
LM43603AQPWPRQ1
Public Made by Adomby adom
Texas Instruments DC-DC Converters, HTSSOP-16-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLM43603AQPWPRQ1
Texas Instruments · DC-DC Converters · HTSSOP-16-EP
LM43603AQPWPRQ1 from Texas Instruments, in a HTSSOP-16-EP. 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 | output | Switching output of regulator internally connected to both power MOSFETs; connect to power inductor. |
| 2 | SW | output | Switching output of regulator internally connected to both power MOSFETs; connect to power inductor. |
| 3 | CBOOT | passive | Bootstrap capacitor connection for high-side driver; connect 470-nF capacitor from CBOOT to SW. |
| 4 | VCC | power_out | Internal bias supply output for bypassing; connect bypass capacitor to AGND, do not connect external loading, never short to ground during operation. |
| 5 | BIAS | power_in | Optional internal LDO supply input with voltage range 3.3V to 28V or VIN; place bypass capacitor 1-10µF to ground when used, tie to ground when not in use, voltage must not exceed VIN. |
| 6 | SYNC | input | Clock input to synchronize switching action to external clock; use high-speed termination to prevent ringing, connect to ground if not used, do not float. |
| 7 | RT | input | Connect resistor from this pin to AGND to program switching frequency; leave floating for 500 kHz default switching frequency. |
| 8 | PGOOD | output | Open drain output for power-good flag; use 10-kΩ to 100-kΩ pullup resistor to logic rail or DC voltage no higher than 12V. |
| 9 | FB | input | Feedback sense input pin connected to midpoint of feedback divider to set VOUT; do not short to ground during operation. |
| 10 | AGND | power_in | Analog ground pin providing ground reference for internal references and logic; connect to system ground. |
| 11 | SS/TRK | input | Soft-start control pin; leave floating for internal soft-start slew rate, connect to capacitor to extend soft start time, or connect external voltage ramp for tracking. |
| 12 | EN | input | Enable input to internal LDO and regulator with high = ON and low = OFF; connect to VIN, resistor divider, or external voltage source, do not float. |
| 13 | VIN | power_in | Supply input pin to internal LDO and high side power FET with voltage range 3.5V to 36V (absolute maximum 42V); connect to power supply and bypass capacitors CIN with path as short as possible. |
| 14 | VIN | power_in | Supply input pin to internal LDO and high side power FET with voltage range 3.5V to 36V (absolute maximum 42V); connect to power supply and bypass capacitors CIN with path as short as possible. |
| 15 | PGND | power_in | Power ground pin connected internally to low side power FET; connect to system ground, PAD, AGND, and ground pins of CIN and COUT with path as short as possible. |
| 16 | PGND | power_in | Power ground pin connected internally to low side power FET; connect to system ground, PAD, AGND, and ground pins of CIN and COUT with path as short as possible. |
| 17 | PAD | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | HTSSOP-16-EP |
| Category | Power Supply Chip |
| Pins | 17 |
CAD (KiCad official)
- Symbol:
LM43603AQPWPRQ1 - Footprint:
Package_SO:TSSOP-16-1EP_4.4x5mm_P0.65mm - 3D model: HTSSOP-16-EP (KiCad packages3D, STEP)
- 3D model files:
lm43603aqpwprq1-etched.step/lm43603aqpwprq1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm43603aqpwprq1.step/lm43603aqpwprq1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (50 pp, sha256
a594b61b24d8e622, retrieved 2026-10-05, 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, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).