component
LM53603AMPWPR
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
markdownLM53603AMPWPR
Texas Instruments · DC-DC Converters · HTSSOP-16-EP
LM53603AMPWPR 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 driven by internal high-side and low-side switches connected to power inductor; connect pins 1 and 2 directly together at the PCB. |
| 2 | SW | output | Regulator switch node driven by internal high-side and low-side switches connected to power inductor; connect pins 1 and 2 directly together at the PCB. |
| 3 | CBOOT | power_out | Bootstrap supply output for gate drivers with voltage rating -0.3 to 3.6 V; connect a 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 with nominal voltage 3.15 V (VBIAS = 3.3 V); do not connect to external loads. |
| 5 | BIAS | power_in | Input to internal voltage regulator connected to output voltage point with voltage rating -0.3 to 16 V; do not ground. |
| 6 | SYNC | input | Synchronization input to regulator used to synchronize switching frequency to system clock with frequency range 1.9 to 2.3 MHz; connect to GND when not used. |
| 7 | FPWM | input | Mode control input to regulator with logic levels VIH ≥ 1.5 V for forced PWM mode and VIL ≤ 0.4 V for automatic PFM/PWM mode; do not float. |
| 8 | RESET | tri_state | Open-drain reset output indicating power OK (high) or fault (low) with upper threshold 105% to 110% and lower threshold 92% to 96.5% of nominal output voltage. |
| 9 | FB | input | Feedback input to regulator connected to output voltage sense point for fixed outputs or feedback divider tap point for adjustable option with bias current 10 nA; do not float or ground. |
| 10 | AGND | power_in | Analog ground for regulator and system with respect to which all electrical parameters are measured; connect to EP and PGND on PCB. |
| 11 | EN | input | Enable input to regulator (high = ON, low = OFF) with rising threshold 1.7 to 2 V and falling shutdown voltage 0.8 V; can be connected directly to VIN. |
| 12 | VIN | power_in | Input supply to regulator with recommended range 3.9 to 36 V and absolute maximum -0.3 to 40 V; connect pins 12 and 13 directly together at the PCB. |
| 13 | VIN | power_in | Input supply to regulator with recommended range 3.9 to 36 V and absolute maximum -0.3 to 40 V; connect pins 12 and 13 directly together at the PCB. |
| 14 | N/C | unconnected | No connection to device. |
| 15 | PGND | power_in | Power ground to internal low-side MOSFET connected 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 connected to AGND and system ground; connect pins 15 and 16 directly together at the PCB. |
| 17 | EP | power_in | Exposed die attach paddle connected 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:
LM53603AMPWPR - Footprint:
Package_SO:TSSOP-16-1EP_4.4x5mm_P0.65mm - 3D model: HTSSOP-16-EP (KiCad packages3D, STEP)
- 3D model files:
lm53603ampwpr-etched.step/lm53603ampwpr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm53603ampwpr.step/lm53603ampwpr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (40 pp, sha256
590d70f52aa0f37f, retrieved 2026-10-01, 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).