7 Detailed Description

7.1 Overview

The TPS54526 is a 5.5-A synchronous step-down (buck) converter with two integrated N-channel MOSFETs

and auto-skip Eco-mode™ to improve light lode efficiency. It operates using D-CAP2™ mode control. The fast

transient response of D-CAP2™ control reduces the output capacitance required to meet a specific level of

performance. Proprietary internal circuitry allows the use of low ESR output capacitors including ceramic and

special polymer types.

7.2 Functional Block Diagram

EN

VO

VFB

GND

VO

4

6

9

1

2

7

SS

VIN

5

VREG

EN

Logic

UV

OV

Protection

Logic

Ref

SS

UV

OV

UVLO

UVLO

Softstart

SS

REF

TSD

Ref

VREG5

5

PG

1 F

m

13

Ceramic

Capacitor

3

SGND

SGND

PGND

+25%

-10%

Ref

VREG5

VREG5

Control logic

1 shot

XCON

-35%

OCP

SW

PGND

ZC

SW

PGND

VIN

SW1

VBST

10

11

12

VIN1

VIN2

14

SW2

PGND1

8

PGND2

A.

The block diagram shown is for the PWP 14 pin package. The QFN 16 pin package block diagram is identical except for the pin out.

TPS54526

SLVSB84D – MAY 2012 – REVISED APRIL 2021

www.ti.com

8

Submit Document Feedback

Copyright © 2021 Texas Instruments Incorporated

Product Folder Links: TPS54526