component
LM53603AQPWPRQ1
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
markdownLM53603AQPWPRQ1
Texas Instruments · DC-DC Converters · HTSSOP-16-EP
LM53603AQPWPRQ1 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 | Regulator switch node. Connect to power inductor. Connect pins 1 and 2 directly together at the PCB. |
| 2 | SW | output | Regulator switch node. Connect to power inductor. Connect pins 1 and 2 directly together at the PCB. |
| 3 | CBOOT | power_in | Bootstrap supply input for gate drivers. Connect a high quality 470 nF capacitor from this pin to SW. |
| 4 | VCC | power_out | Internal 3.15 V regulator output. Used as supply to internal control circuits. Do not connect to any external loads. Can be used as logic supply for control inputs. Connect a high quality 3.3 µF capacitor from this pin to GND. |
| 5 | BIAS | power_in | Input to internal voltage regulator. Connect to output voltage point. Do not ground. Connect a high quality 0.1 µF capacitor from this pin to GND. |
| 6 | SYNC | input | Synchronization input to regulator. Used to synchronize the regulator switching frequency to the system clock. When not used connect to GND; do not float. |
| 7 | FPWM | input | Mode control input to regulator. High = forced PWM (FPWM). Low = auto mode; automatic transition between PFM and PWM. Do not float. |
| 8 | RESET | output | Open drain reset output. Connect to suitable voltage supply through a current limiting resistor. High = power OK. Low = fault. RESET will go low when EN = low. |
| 9 | FB | input | Feedback input to regulator. Connect to output voltage sense point for fixed 5 V and 3.3 V output. Connect to feedback divider tap point for ADJ option. Do not float or ground. |
| 10 | AGND | power_in | Analog ground for regulator and system. All electrical parameters are measured with respect to this pin. Connect to EP and PGND on PCB. |
| 11 | EN | input | Enable input to the regulator. High = ON. Low = OFF. Can be connected directly to VIN. Do not float. |
| 12 | VIN | power_in | Input supply to the regulator. Connect a high quality bypass capacitor(s) from this pin to PGND. Connect pins 12 and 13 directly together at the PCB. |
| 13 | VIN | power_in | Input supply to the regulator. Connect a high quality bypass capacitor(s) from this pin to PGND. Connect pins 12 and 13 directly together at the PCB. |
| 14 | N/C | unconnected | This pin has no connection to the device. |
| 15 | PGND | power_in | Power ground to internal low side MOSFET. Connect to AGND and system ground. Connect pins 15 and 16 directly together at the PCB. |
| 16 | PGND | power_in | Power ground to internal low side MOSFET. Connect to AGND and system ground. Connect pins 15 and 16 directly together at the PCB. |
| 17 | EP | power_in | Exposed die attach paddle. Connect to ground plane for adequate heat sinking and noise reduction. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | HTSSOP-16-EP |
| Category | Power Supply Chip |
| Pins | 17 |
CAD (KiCad official)
- Symbol:
LM53603AQPWPRQ1 - Footprint:
Package_SO:TSSOP-16-1EP_4.4x5mm_P0.65mm - 3D model: HTSSOP-16-EP (KiCad packages3D, STEP)
- 3D model files:
lm53603aqpwprq1-etched.step/lm53603aqpwprq1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm53603aqpwprq1.step/lm53603aqpwprq1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (42 pp, sha256
b2d0d78814aaf2aa, retrieved 2026-10-06, 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).