# LP873364RHDR

**Texas Instruments** · DC-DC Converters · VQFN-28(5x5)

LP873364RHDR from Texas Instruments, in a VQFN-28(5x5). 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 | VOUT_LDO0 | power_out | LDO0 regulator output; leave the pin floating if LDO0 is not used. |
| 2 | FB_B0 | input | Positive output-voltage feedback sense input for Buck 0. |
| 3 | FB_B1 | input | Positive output-voltage feedback for Buck 1 in two single-phase configuration, and negative output-ground feedback for Buck 0 in dual-phase configuration. |
| 4 | AGND | power_in | Analog ground. |
| 5 | VANA | power_in | Supply voltage for analog and digital blocks; must be connected to the same node as VIN_Bx. |
| 6 | EN | input | Programmable enable input for the regulators and GPOs; leave floating if not used. |
| 7 | VOUT_LDO1 | power_out | LDO1 regulator output; leave the pin floating if LDO1 is not used. |
| 8 | VIN_LDO1 | power_in | Power input for LDO1; connect to VANA if LDO1 is not used. |
| 9 | nINT | output | Open-drain interrupt output, active LOW; connect to ground if not used. |
| 10 | CLKIN | bidirectional | External clock input, with alternative function GPO2 general-purpose digital output selected by CLKIN_PIN_SEL; leave floating if not used. |
| 11 | VIN_B1 | power_in | Power input for Buck 1; VIN_Bx pins are not connected internally and must be tied together externally and locally bypassed. |
| 12 | VIN_B1 | power_in | Power input for Buck 1; VIN_Bx pins are not connected internally and must be tied together externally and locally bypassed. |
| 13 | SW_B1 | power_out | Buck 1 switch node; leave floating if Buck 1 is not used. |
| 14 | SW_B1 | power_out | Buck 1 switch node; leave floating if Buck 1 is not used. |
| 15 | PGND_B1 | power_in | Power ground for Buck 1. |
| 16 | PGND_B1 | power_in | Power ground for Buck 1. |
| 17 | SCL | input | I2C serial interface clock input; connect a pull-up resistor, or connect to ground if the I2C interface is not used. |
| 18 | SDA | bidirectional | I2C serial interface data input and output; connect a pull-up resistor, or connect to ground if the I2C interface is not used. |
| 19 | SGND | power_in | Signal ground. |
| 20 | PGND_B0 | power_in | Power ground for Buck 0. |
| 21 | PGND_B0 | power_in | Power ground for Buck 0. |
| 22 | SW_B0 | power_out | Buck 0 switch node; leave floating if Buck 0 is not used. |
| 23 | SW_B0 | power_out | Buck 0 switch node; leave floating if Buck 0 is not used. |
| 24 | VIN_B0 | power_in | Power input for Buck 0; VIN_Bx pins are not connected internally and must be tied together externally and locally bypassed. |
| 25 | VIN_B0 | power_in | Power input for Buck 0; VIN_Bx pins are not connected internally and must be tied together externally and locally bypassed. |
| 26 | GPO | output | General-purpose digital output; leave floating if not used. |
| 27 | PGOOD | output | Power-good indication output; leave floating if not used. |
| 28 | VIN_LDO0 | power_in | Power input for LDO0; connect to VANA if LDO0 is not used. |
| 29 | THERMAL PAD | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VQFN-28(5x5) |
| Category | Power Management (PMIC) |
| Pins | 29 |

## CAD (KiCad official)

- Symbol: `LP873364RHDR`
- Footprint: `Package_DFN_QFN:QFN-28-1EP_5x5mm_P0.5mm_EP3.35x3.35mm`
- 3D model: VQFN-28(5x5) (KiCad packages3D, STEP)
- 3D model files: `lp873364rhdr-etched.step` / `lp873364rhdr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lp873364rhdr.step` / `lp873364rhdr.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/lp8733) (85 pp, sha256 `889456548ab095e4`, retrieved 2026-10-08, 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`, 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/lp873364rhdr-datasheet.pdf)