component
VIPER28HDTR
Public Made by Adomby adom
STMicroelectronics AC-DC Controllers And Regulators, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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VIPER28HDTR
STMicroelectronics · AC-DC Controllers And Regulators · SOIC-16
VIPER28HDTR from STMicroelectronics, in a SOIC-16. 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 | GND | power_in | Device ground and the source of the power section; pins 1 and 2 are both ground and should be tied together on the board. |
| 2 | GND | power_in | Device ground and the source of the power section; it is paired with pin 1 as a ground connection. |
| 3 | N.C. | unconnected | Not connected internally; the datasheet gives no function or electrical limit for this pin. |
| 4 | N.A. | unconnected | Not available for user; it is mechanically connected to the controller die pad of the frame, and connecting it to GND (pins 1-2) is highly recommended to improve noise immunity. |
| 5 | VDD | power_in | Supply voltage of the control section, which also provides the charging current of the external capacitor during startup; absolute maximum VDD is self-limited with IDD input current limited to 25 mA. |
| 6 | CONT | input | Control pin used for cycle-by-cycle current limit (IDlim) reduction through an external resistor to ground and for output overvoltage monitoring (VOVP); the absolute maximum pin voltage is -0.3 V to 6 V. |
| 7 | FB | input | Control input for duty cycle control and burst-mode entry below VFBbm; the absolute maximum feedback voltage is -0.3 V to 5.5 V. |
| 8 | EPT | input | Allows connection of an external capacitor for extra power management; if unused it must be connected to GND, and the absolute maximum EPT input voltage is -0.3 V to 5 V. |
| 9 | N.C. | unconnected | Not connected; the datasheet gives no function or electrical limit for this pin. |
| 10 | N.C. | unconnected | Not connected; the datasheet gives no function or electrical limit for this pin. |
| 11 | N.C. | unconnected | Not connected; the datasheet gives no function or electrical limit for this pin. |
| 12 | N.C. | unconnected | Not connected; the datasheet gives no function or electrical limit for this pin. |
| 13 | DRAIN | passive | High-voltage drain pin of the internal power MOSFET and the built-in high-voltage startup bias current source, rated at 800 V drain-to-source (ground); it is also connected to the metal frame for heat dissipation. |
| 14 | DRAIN | passive | High-voltage drain pin of the internal power MOSFET and the built-in high-voltage startup bias current source, rated at 800 V drain-to-source (ground); it is also connected to the metal frame for heat dissipation. |
| 15 | DRAIN | passive | High-voltage drain pin of the internal power MOSFET and the built-in high-voltage startup bias current source, rated at 800 V drain-to-source (ground); it is also connected to the metal frame for heat dissipation. |
| 16 | DRAIN | passive | High-voltage drain pin of the internal power MOSFET and the built-in high-voltage startup bias current source, rated at 800 V drain-to-source (ground); it is also connected to the metal frame for heat dissipation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOIC-16 |
| Category | Power Management (PMIC) |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
VIPER28HDTR - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SOIC-16 (KiCad packages3D, STEP)
- 3D model files:
viper28hdtr-etched.step/viper28hdtr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);viper28hdtr.step/viper28hdtr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (31 pp, sha256
77f7390609cc2adb, retrieved 2026-10-11, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(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).
# VIPER28HDTR
**STMicroelectronics** · AC-DC Controllers And Regulators · SOIC-16
VIPER28HDTR from STMicroelectronics, in a SOIC-16. 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 | GND | power_in | Device ground and the source of the power section; pins 1 and 2 are both ground and should be tied together on the board. |
| 2 | GND | power_in | Device ground and the source of the power section; it is paired with pin 1 as a ground connection. |
| 3 | N.C. | unconnected | Not connected internally; the datasheet gives no function or electrical limit for this pin. |
| 4 | N.A. | unconnected | Not available for user; it is mechanically connected to the controller die pad of the frame, and connecting it to GND (pins 1-2) is highly recommended to improve noise immunity. |
| 5 | VDD | power_in | Supply voltage of the control section, which also provides the charging current of the external capacitor during startup; absolute maximum VDD is self-limited with IDD input current limited to 25 mA. |
| 6 | CONT | input | Control pin used for cycle-by-cycle current limit (IDlim) reduction through an external resistor to ground and for output overvoltage monitoring (VOVP); the absolute maximum pin voltage is -0.3 V to 6 V. |
| 7 | FB | input | Control input for duty cycle control and burst-mode entry below VFBbm; the absolute maximum feedback voltage is -0.3 V to 5.5 V. |
| 8 | EPT | input | Allows connection of an external capacitor for extra power management; if unused it must be connected to GND, and the absolute maximum EPT input voltage is -0.3 V to 5 V. |
| 9 | N.C. | unconnected | Not connected; the datasheet gives no function or electrical limit for this pin. |
| 10 | N.C. | unconnected | Not connected; the datasheet gives no function or electrical limit for this pin. |
| 11 | N.C. | unconnected | Not connected; the datasheet gives no function or electrical limit for this pin. |
| 12 | N.C. | unconnected | Not connected; the datasheet gives no function or electrical limit for this pin. |
| 13 | DRAIN | passive | High-voltage drain pin of the internal power MOSFET and the built-in high-voltage startup bias current source, rated at 800 V drain-to-source (ground); it is also connected to the metal frame for heat dissipation. |
| 14 | DRAIN | passive | High-voltage drain pin of the internal power MOSFET and the built-in high-voltage startup bias current source, rated at 800 V drain-to-source (ground); it is also connected to the metal frame for heat dissipation. |
| 15 | DRAIN | passive | High-voltage drain pin of the internal power MOSFET and the built-in high-voltage startup bias current source, rated at 800 V drain-to-source (ground); it is also connected to the metal frame for heat dissipation. |
| 16 | DRAIN | passive | High-voltage drain pin of the internal power MOSFET and the built-in high-voltage startup bias current source, rated at 800 V drain-to-source (ground); it is also connected to the metal frame for heat dissipation. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOIC-16 |
| Category | Power Management (PMIC) |
| Pins | 16 |
## CAD (KiCad official)
- Symbol: `VIPER28HDTR`
- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`
- 3D model: SOIC-16 (KiCad packages3D, STEP)
- 3D model files: `viper28hdtr-etched.step` / `viper28hdtr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `viper28hdtr.step` / `viper28hdtr.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603077513690435584) (31 pp, sha256 `77f7390609cc2adb`, retrieved 2026-10-11, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (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/viper28hdtr-datasheet.pdf)