component
A7987TR
Public Made by Adomby adom
STMicroelectronics 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
markdownA7987TR
STMicroelectronics · DC-DC Converters · HTSSOP-16-EP
A7987TR from STMicroelectronics, 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 | VBIAS | power_in | Auxiliary input voltage supply for analog circuitry, typically connected to regulated output voltage or external rail higher than 3V. |
| 2 | VIN | power_in | DC input voltage supply. |
| 3 | VIN | power_in | DC input voltage supply. |
| 4 | VCC | power_in | Filtered DC input voltage for internal circuitry; bypass with 1µF ceramic capacitor to GND. |
| 5 | EN | input | Active high enable pin; connect to VCC if not used. |
| 6 | SS | input | Soft-start programming pin with internal 5µA current generator charging external capacitor. |
| 7 | SYNCH | input | Master/slave synchronization pin for multiple device clock synchronization. |
| 8 | COMP | output | Output of error amplifier; external compensation network connection point. |
| 9 | FB | input | Inverting input of error amplifier; output voltage feedback sensing node. |
| 10 | FSW | input | Switching frequency programming pin; pull-down resistor to GND selects frequency between 250kHz and 1.5MHz. |
| 11 | ILIM | input | Peak current limit programming pin; pull-down resistor to GND selects current limitation. |
| 12 | PGOOD | tri_state | Power good open collector output driven low when output voltage is out of regulation. |
| 13 | LX | output | Switching node connecting high-side and low-side power switches. |
| 14 | LX | output | Switching node connecting high-side and low-side power switches. |
| 15 | BOOT | output | Bootstrap supply pin for gate driver; connect 100nF external capacitor between BOOT and LX. |
| 16 | GND | power_in | Signal ground reference. |
| 17 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | HTSSOP-16-EP |
| Category | Power Supply Chip |
| Pins | 17 |
CAD (KiCad official)
- Symbol:
A7987TR - Footprint:
Package_SO:TSSOP-16-1EP_4.4x5mm_P0.65mm - 3D model: HTSSOP-16-EP (KiCad packages3D, STEP)
- 3D model files:
a7987tr-etched.step/a7987tr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);a7987tr.step/a7987tr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (36 pp, sha256
9a51ee02e0cbf118, retrieved 2026-10-06, tier: lcsc) - 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).