TPS54526 4.5-V to 18-V Input, 5.5-A Synchronous Step-Down Converter with Eco-

mode™

1 Features

• D-CAP2™ mode enables fast transient response

• Low output ripple and allows ceramic output

capacitor

• Wide VIN input voltage range: 4.5 V to 18 V

• Output voltage range: 0.76 V to 5.5 V

• Highly efficient integrated FETs optimized

for lower duty cycle applications

– 63 mΩ (high side) and 33 mΩ (low side)

• High efficiency, less than 10 μA at shutdown

• High initial bandgap reference accuracy

• Adjustable soft start

• Pre-biased soft start

• 650-kHz switching frequency (fSW)

• Cycle-by-cycle over current limit

• Power good output

• Auto-skip Eco-mode™ for high efficiency at light

load

2 Applications

• Wide range of applications for low voltage system

– Digital TV power supply

– High definition Blu-ray Disc™ players

– Networking home terminal

– Digital set top box (STB)

3 Description

The TPS54526 is an adaptive on-time D-CAP2™

mode synchronous buck converter. The TPS54526

enables system designers to complete the suite

of various end equipment’s power bus regulators

with a cost effective, low component count, low

standby current solution. The main control loop for

the TPS54526 uses the D-CAP2™ mode control

which provides a very fast transient response with

no external compensation components. The adaptive

on-time control supports seamless transition between

PWM mode at higher load conditions and Eco-

mode™ operation at light loads. Eco-mode™ allows

the TPS54526 to maintain high efficiency during

lighter load conditions. The TPS54526 also has a

proprietary circuit that enables the device to adopt

to both low equivalent series resistance (ESR) output

capacitors, such as POSCAP, SP-CAP, and ultra-low

ESR ceramic capacitors. The device operates from

4.5-V to 18-V VIN input. The output voltage can be

programmed between 0.76V and 5.5V. The device

also features an adjustable soft start time and a power

good function. The TPS54526 is available in the 14-

pin HTSSOP package and the 16 pin QFN package,

designed to operate from –40°C to 85°C.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPS54526

HTSSOP (14)

5.00mm x 4.40mm

VQFN (16)

4.00mm x 4.00mm

(1)

For all available packages, see the orderable addendum at

the end of the datasheet.

U1

TPS54526PWP

Slew Rate (0.35A/µsec)

V

(50 mV/div ac coupled)

O

I

(2A/div)

OUT

Time Scale (100µsec/div)

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TPS54526

SLVSB84D – MAY 2012 – REVISED APRIL 2021

Copyright © 2021 Texas Instruments Incorporated

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TPS54526

SLVSB84D – MAY 2012 – REVISED APRIL 2021

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.