component
LP873220RHDRQ1
Public Made by Adomby adom
Texas Instruments DC-DC Converters, VQFN-28-EP(5x5). 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
markdownLP873220RHDRQ1
Texas Instruments · DC-DC Converters · VQFN-28-EP(5x5)
LP873220RHDRQ1 from Texas Instruments, in a VQFN-28-EP(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 | Output of LDO0; 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 (sense) input for Buck 1. |
| 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, with a recommended range of 2.8 V to 5.5 V. |
| 6 | EN | input | Programmable enable input for the regulators and GPOs; leave floating if not used, and the internal pull-down is enabled by default (EN_PD = 1). |
| 7 | VOUT_LDO1 | power_out | Output of LDO1; 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. Recommended range 2.5 V to 5.5 V. |
| 9 | nINT | output | Open-drain interrupt output, active low; connect to ground if not used. |
| 10 | CLKIN | bidirectional | External clock input, alternatively configurable as general-purpose digital output GPO2; leave floating if not used. |
| 11 | VIN_B1 | power_in | 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 | 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 clock input; connect a pull-up resistor, or connect to ground if the I2C interface is not used. |
| 18 | SDA | bidirectional | I2C serial data input/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 | 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 | 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. Recommended range 2.5 V to 5.5 V. |
| 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-EP(5x5) |
| Category | Power Management (PMIC) |
| Pins | 29 |
CAD (KiCad official)
- Symbol:
LP873220RHDRQ1 - Footprint:
Package_DFN_QFN:QFN-28-1EP_5x5mm_P0.5mm_EP3.35x3.35mm - 3D model: VQFN-28-EP(5x5) (KiCad packages3D, STEP)
- 3D model files:
lp873220rhdrq1-etched.step/lp873220rhdrq1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lp873220rhdrq1.step/lp873220rhdrq1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (78 pp, sha256
27969d2a778a9013, retrieved 2026-10-08, 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).