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TPS6521825RSLR

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Texas Instruments Power Management - Specialized, VQFN-48-EP(6x6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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TPS6521825RSLR

Texas Instruments · Power Management - Specialized · VQFN-48-EP(6x6)

TPS6521825RSLR from Texas Instruments, in a VQFN-48-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 IN_DCDC1 power_in Input supply pin for DCDC1.
2 SDA bidirectional Data line for the I2C interface; connect to a pullup resistor.
3 SCL input Clock input for the I2C interface; connect to a pullup resistor.
4 LDO1 power_out Output voltage pin for LDO1; connect to a capacitor.
5 IN_LDO1 power_in Input supply pin for LDO1.
6 IN_LS3 power_in Input supply pin for load switch 3.
7 LS3 power_out Output voltage pin for load switch 3; connect to a capacitor.
8 PGOOD output Power-good output, open drain; pulled low when DCDC1-4 or LDO1 are out of regulation, and load switches and DCDC5-6 do not affect it.
9 AC_DET input AC monitor input and enable for DCDC1-4, LDO1 and load switches; tie to IN_BIAS if not used.
10 nPFO output Deglitched power-fail comparator output, open drain; pulled low when the PFI input is below the power-fail threshold.
11 GPIO1 bidirectional Configurable as DDR reset input (driving GPO2) or as a general-purpose open-drain output.
12 IN_DCDC4 power_in Input supply pin for DCDC4.
13 L4A power_out Switch pin for DCDC4; connect to inductor.
14 L4B power_out Switch pin for DCDC4; connect to inductor.
15 DCDC4 power_out Output voltage pin for DCDC4; connect to a capacitor.
16 PFI input Power-fail comparator input; connect to a resistor divider.
17 DC34_SEL input Power-up default selection pin for DCDC3 or DCDC4, programmed by a resistor to ground (resistor options in section 8.3.1.13).
18 IN_nCC output Push-pull output indicating whether DCDC5 and DCDC6 are powered from IN_BU (high) or the coin cell CC (low).
19 PGOOD_BU output Push-pull power-good output for DCDC5 and DCDC6; low when either is out of regulation, and high (at DCDC6 output voltage) when both are in regulation.
20 L5 power_out Switch pin for DCDC5; connect to inductor.
21 FB5 input Feedback voltage pin for DCDC5; connect to output capacitor.
22 FB6 input Feedback voltage pin for DCDC6; connect to output capacitor.
23 L6 power_out Switch pin for DCDC6; connect to inductor.
24 SYS_BU power_out System voltage pin for the battery-backup supply path; connect to a 1-µF capacitor, and connecting any external load is not recommended.
25 CC power_in Coin-cell battery input that supplies DCDC5 and DCDC6 when no voltage is applied to IN_BU; tie to ground if not in use.
26 GPIO3 bidirectional Configurable as warm reset (negative edge) for DCDC1 and DCDC2, or as a general-purpose open-drain output.
27 IN_BU power_in Default input supply pin for the battery-backup supplies (DCDC5 and DCDC6).
28 N/C unconnected No connect; leave pin floating.
29 N/C unconnected No connect; leave pin floating.
30 LS1 power_out Output voltage pin for load switch 1; connect to a capacitor.
31 IN_LS1 power_in Input supply pin for load switch 1.
32 IN_LS2 power_in Input supply pin for load switch 2.
33 LS2 power_out Output voltage pin for load switch 2; connect to a capacitor.
34 GPO2 output DDR reset signal controlled by GPIO1, or a general-purpose output; buffer configurable as push-pull or open drain, with 6 mA source/sink limit.
35 INT_LDO power_out Internal bias voltage; connect to a 1-µF capacitor, and TI does not recommend connecting any external load.
36 IN_BIAS power_in Input supply pin for the reference system.
37 IN_DCDC3 power_in Input supply pin for DCDC3.
38 L3 power_out Switch pin for DCDC3; connect to inductor.
39 FB3 input Feedback voltage pin for DCDC3; connect to output capacitor.
40 nWAKEUP output Signal to the SoC indicating a power-on event (active low, open-drain output).
41 FB2 input Feedback voltage pin for DCDC2; connect to output capacitor.
42 L2 power_out Switch pin for DCDC2; connect to inductor.
43 IN_DCDC2 power_in Input supply pin for DCDC2.
44 PB input Push-button monitor input, typically a momentary switch to ground (active low).
45 nINT output Interrupt output (active low, open drain); pulled low when an interrupt bit is set and released after the bit is read.
46 PWR_EN input Power-enable input for DCDC1-4, LDO1 and load switches.
47 FB1 input Feedback voltage pin for DCDC1; connect to output capacitor.
48 L1 power_out Switch pin for DCDC1; connect to inductor.
49 Thermal Pad passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package VQFN-48-EP(6x6)
Category Power Management (PMIC)
Pins 49

CAD (KiCad official)

  • Symbol: TPS6521825RSLR
  • Footprint: Package_DFN_QFN:QFN-48-1EP_6x6mm_P0.4mm_EP4.4x4.4mm
  • 3D model: VQFN-48-EP(6x6), generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.9 mm nominal QFN height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
  • 3D model files: tps6521825rslr-etched.step / tps6521825rslr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tps6521825rslr.step / tps6521825rslr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (94 pp, sha256 d04b48faa7750415, 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