V

(50 mV/div)

out

I

(2 A/div)

out

100 µs/div

TPA54427DDA

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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.

TPS54427

SLVSB43C – NOVEMBER 2011 – REVISED FEBRUARY 2016

TPS54427 4.5-V to 18-V Input, 4-A Output Single Synchronous Step-Down Switcher With

Integrated FET

1

1 Features

1

•

D-CAP2™ Mode Enables Fast Transient

Response

•

Low Output Ripple and Allows Ceramic Output

Capacitor

•

•

Output Voltage Range: 0.76 V to 7.0 V

•

Highly Efficient Integrated FETs Optimized

for Lower Duty Cycle Applications

– 70 m

Ω (High Side) and 53 mΩ (Low Side)

•

High Efficiency, Less Than 10

μA at Shutdown

•

High Initial Bandgap Reference Accuracy

•

Adjustable Soft Start

•

Pre-Biased Soft Start

•

•

Cycle by Cycle Over Current Limit

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 TPS54427 is an adaptive on-time D-CAP2™

mode synchronous buck converter. The TPS54427

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 TPS54427 uses the D-

CAP2™ mode control which provides a fast transient

response

with

no

external

compensation

components.

The TPS54427 also has a proprietary circuit that

enables the device to adopt to both low equivalent

series resistance (ESR) output capacitors, such as

POSCAP or 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

0.76 V and 7 V.

The device also features an adjustable soft start time.

The TPS54427 is available in the 8-pin DDA package

and 10-pin DRC, and is designed to operate from

–40°C to 85°C.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPS54427

SO PowerPAD™ (8) 4.89 mm × 3.90 mm

VSON (10)

3.00 mm × 3.00 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Simplified Schematic

TPS54427 Transient Response