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TPS51220ARSNR
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Texas Instruments Power Management - Specialized, WQFN-32-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
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PCB Footprint
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Datasheet
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README
markdownTPS51220ARSNR
Texas Instruments · Power Management - Specialized · WQFN-32-EP(4x4)
TPS51220ARSNR from Texas Instruments, in a WQFN-32-EP(4x4). 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 | DRVH1 | output | Channel 1 high-side MOSFET gate driver output, rated source 1.7 Ω and sink 1.0 Ω, SW-node referenced floating driver whose drive voltage is VBST to SW. |
| 2 | V5SW | input | 5-V switchover supply input for VREG5; switchover is enabled when EN1 is high, PGOOD1 indicates good, and V5SW is above 4.8 V, after which VREG5 is approximately equal to V5SW. |
| 3 | RF | bidirectional | Frequency setting pin with a resistor to signal GND (200 kHz to 1 MHz), which can also be driven by an external clock for synchronization. |
| 4 | EN1 | input | Channel 1 SMPS enable: apply greater than 0.55 V and less than 6 V to turn on or leave floating, connect to GND to disable, and the adjustable soft-start capacitor attaches here. |
| 5 | PGOOD1 | output | Channel 1 powergood window comparator output; the recommended applied voltage is less than 6 V and the recommended pull-up is 100 kΩ to 1 MΩ. |
| 6 | SKIPSEL1 | input | Channel 1 skip mode select: GND for continuous conduction, VREF2 for auto skip, VREG3 for OOA auto skip with maximum 7 skips (suitable for fsw < 400 kHz), and VREG5 for OOA auto skip with maximum 15 skips (suitable for fsw ≥ 400 kHz). |
| 7 | CSP1 | bidirectional | Channel 1 current sense comparator positive input; an RC network with X5R or X7R ceramic capacitor extracts the DCR voltage drop, with 0.1 µF given as a good starting value. |
| 8 | CSN1 | bidirectional | Channel 1 current sense comparator negative input, also used as supply for the current sense circuit at 5 V or higher output settings and as the output discharge terminal. |
| 9 | VFB1 | input | Channel 1 SMPS voltage feedback input, connected to the feedback divider and referred to signal GND, with a regulated reference of 1.000 V. |
| 10 | COMP1 | passive | Channel 1 loop compensation pin (error amplifier output) for current mode, connected through R (and C if required) to VREF2; in D-CAP mode, R to VREF2 sets ramp compensation with 10 kΩ as a starting value (6 kΩ to 20 kΩ allowed). |
| 11 | FUNC | input | Control architecture and OVP selection: GND for current mode with OVP enabled, VREF2 for D-CAP mode with OVP disabled, VREG3 for D-CAP mode with OVP enabled, and VREG5 for current mode with OVP disabled. |
| 12 | EN | input | VREF2 and VREG5 linear regulator enable: apply greater than 1.2 V and less than 6 V to turn on, and connect to GND to disable. |
| 13 | VREF2 | power_out | 2-V reference output that must be bypassed to signal GND with 0.22 µF of ceramic capacitance. |
| 14 | TRIP | input | Overcurrent trip level and discharge mode select: GND for V(OCL-ULV) with discharge on, VREF2 for V(OCL-ULV) with discharge off, VREG3 for V(OCL-LV) with discharge off, and VREG5 for V(OCL-LV) with discharge on. |
| 15 | COMP2 | passive | Channel 2 loop compensation pin (error amplifier output) for current mode, connected through R (and C if required) to VREF2; in D-CAP mode, R to VREF2 sets ramp compensation with 10 kΩ as a starting value (6 kΩ to 20 kΩ allowed). |
| 16 | VFB2 | input | Channel 2 SMPS voltage feedback input, connected to the feedback divider and referred to signal GND, with a regulated reference of 1.000 V. |
| 17 | CSN2 | bidirectional | Channel 2 current sense comparator negative input, also used as supply for the current sense circuit at 5 V or higher output settings and as the output discharge terminal. |
| 18 | CSP2 | bidirectional | Channel 2 current sense comparator positive input; an RC network with X5R or X7R ceramic capacitor extracts the DCR voltage drop, with 0.1 µF given as a good starting value. |
| 19 | SKIPSEL2 | input | Channel 2 skip mode select: GND for continuous conduction, VREF2 for auto skip, VREG3 for OOA auto skip with maximum 7 skips (suitable for fsw < 400 kHz), and VREG5 for OOA auto skip with maximum 15 skips (suitable for fsw ≥ 400 kHz). |
| 20 | PGOOD2 | output | Channel 2 powergood window comparator output; the recommended applied voltage is less than 6 V and the recommended pull-up is 100 kΩ to 1 MΩ. |
| 21 | EN2 | input | Channel 2 SMPS enable: apply greater than 0.55 V and less than 6 V to turn on or leave floating, connect to GND to disable, and the adjustable soft-start capacitor attaches here. |
| 22 | VREG3 | power_out | Always-alive 3.3 V, 10 mA low-dropout regulator output that must be bypassed to signal GND with more than 1 µF ceramic; it runs from VIN or from VREG5 when switched over to V5SW. |
| 23 | VIN | power_in | Supply input for the 5-V and 3.3-V linear regulators, typically connected to VBAT, with an input voltage range of 4.5 V to 32 V. |
| 24 | DRVH2 | output | Channel 2 high-side MOSFET gate driver output, rated source 1.7 Ω and sink 1.0 Ω, SW-node referenced floating driver whose drive voltage is VBST to SW. |
| 25 | SW2 | bidirectional | Channel 2 high-side MOSFET gate driver return, connected to the switching node. |
| 26 | VBST2 | input | Channel 2 boot strap supply input for the high-side N-channel driver, requiring a capacitor of 0.1 µF or greater from this pin to SW2; an optional Schottky diode from VREG5 may be added. |
| 27 | DRVL2 | output | Channel 2 low-side MOSFET gate driver output, rated source 1.3 Ω and sink 0.7 Ω, GND referenced. |
| 28 | GND | power_in | Ground reference for the device. |
| 29 | VREG5 | power_out | 5-V, 100-mA low-dropout regulator output that must be bypassed to power GND with 10 µF ceramic, runs from VIN, shuts off with EN, and switches over to V5SW when 4.8 V or above is provided. |
| 30 | DRVL1 | output | Channel 1 low-side MOSFET gate driver output, rated source 1.3 Ω and sink 0.7 Ω, GND referenced. |
| 31 | VBST1 | input | Channel 1 boot strap supply input for the high-side N-channel driver, requiring a capacitor of 0.1 µF or greater from this pin to SW1; an optional Schottky diode from VREG5 may be added. |
| 32 | SW1 | bidirectional | Channel 1 high-side MOSFET gate driver return, connected to the switching node. |
| 33 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | WQFN-32-EP(4x4) |
| Category | Power Management (PMIC) |
| Pins | 33 |
CAD (KiCad official)
- Symbol:
TPS51220ARSNR - Footprint:
Package_DFN_QFN:QFN-32-1EP_4x4mm_P0.4mm_EP2.9x2.9mm - 3D model: WQFN-32-EP(4x4) (KiCad packages3D, STEP)
- 3D model files:
tps51220arsnr-etched.step/tps51220arsnr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tps51220arsnr.step/tps51220arsnr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (55 pp, sha256
6e980b37451f3708, 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).