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TPS65258RHAR

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Texas Instruments DC-DC Converters, VQFN-40-EP(6x6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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TPS65258RHAR

Texas Instruments · DC-DC Converters · VQFN-40-EP(6x6)

TPS65258RHAR from Texas Instruments, in a VQFN-40-EP(6x6). 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 RLIM3 input Current-limit setting pin for Buck3; a resistor from this pin to ground sets the peak inductor current limit.
2 SS3 input Soft-start pin for Buck3; a small ceramic capacitor on this pin sets the converter soft-start time.
3 COMP3 output Compensation pin for Buck3; a series RC network connected here completes the converter compensation circuit.
4 FB3 input Feedback input for Buck3; a divider set to 0.8 V from the converter output to ground.
5 USB2_EN input Enable input for USB2 switch; a high level turns the switch on.
6 ROSC input Oscillator set pin; the resistor on this pin sets the frequency of the internal autonomous clock.
7 FB1 input Feedback input for Buck1; a divider set to 0.8 V from the converter output to ground.
8 COMP1 output Compensation pin for Buck1; a series RC network connected here completes the converter compensation circuit.
9 SS1 input Soft-start pin for Buck1; a small ceramic capacitor on this pin sets the converter soft-start time.
10 RLIM1 input Current-limit setting pin for Buck1; a resistor from this pin to ground sets the peak inductor current limit.
11 EN1 input Enable pin for Buck1; a high signal enables the regulator, and a small capacitor to ground adds a delayed start-up.
12 BST1 input Bootstrap capacitor pin for Buck1; a 47-nF ceramic capacitor is fitted from this pin to the switching node.
13 VIN1 input Input supply for Buck1; a 10-µF ceramic capacitor is fitted close to this pin.
14 LX1 output Switching node for Buck1.
15 LX1 output Switching node for Buck1.
16 LX2 output Switching node for Buck2.
17 LX2 output Switching node for Buck2.
18 VIN2 input Input supply for Buck2; a 10-µF ceramic capacitor is fitted close to this pin.
19 BST2 input Bootstrap capacitor pin for Buck2; a 47-nF ceramic capacitor is fitted from this pin to the switching node.
20 EN2 input Enable pin for Buck2; a high signal enables the regulator, and a small capacitor to ground adds a delayed start-up.
21 RLIM2 input Current-limit setting pin for Buck2; a resistor from this pin to ground sets the peak inductor current limit.
22 SS2 input Soft-start pin for Buck2; a small ceramic capacitor on this pin sets the converter soft-start time.
23 COMP2 output Compensation pin for Buck2; a series RC network connected here completes the converter compensation circuit.
24 FB2 input Feedback input for Buck2; a divider set to 0.8 V from the converter output to ground.
25 F_PWM input When high, forces PWM operation in all converters; when low, the converters operate in automatic PFM/PWM mode.
26 USB2_nFAULT output USB2 fault flag, open-drain and active low; asserted when an overcurrent or overtemperature condition is detected in the switch.
27 PGOOD output Open-drain power-good output, asserted low after all converters are sequenced and within regulation; polarity is factory selectable (active high by default).
28 V7V power_out Internal supply; connect a 10-µF ceramic capacitor from this pin to ground.
29 V3V power_out Internal supply; connect a 10-µF ceramic capacitor from this pin to ground.
30 USB2_Vo output USB2 switch output.
31 USB2_VIN input USB2 switch input supply.
32 USB1_VIN input USB1 switch input supply.
33 USB1_Vo output USB1 switch output.
34 USB1_EN input Enable input for USB1 switch; a high level turns the switch on.
35 USB1_nFAULT output USB1 fault flag, open-drain and active low; asserted when an overcurrent or overtemperature condition is detected in the switch.
36 LX3 output Switching node for Buck3.
37 LX3 output Switching node for Buck3.
38 VIN3 input Input supply for Buck3; a 10-µF ceramic capacitor is fitted close to this pin.
39 BST3 input Bootstrap capacitor pin for Buck3; a 47-nF ceramic capacitor is fitted from this pin to the switching node.
40 EN3 input Enable pin for Buck3; a high signal enables the converter, and a small capacitor to ground adds a delayed start-up.
41 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package VQFN-40-EP(6x6)
Category Power Management (PMIC)
Pins 41

CAD (KiCad official)

  • Symbol: TPS65258RHAR
  • Footprint: Package_DFN_QFN:QFN-40-1EP_6x6mm_P0.5mm_EP4.6x4.6mm
  • 3D model: VQFN-40-EP(6x6) (KiCad packages3D, STEP)
  • 3D model files: tps65258rhar-etched.step / tps65258rhar-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tps65258rhar.step / tps65258rhar.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (38 pp, sha256 a5168811bbf32290, retrieved 2026-10-11, 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