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Contents

Pinout
Key specifications
CAD (KiCad official)
Provenance

README

markdown

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