SW

VIN

GND

BOOT

FB

COMP

TPS54540-Q1

EN

RT/CLK

60

65

70

75

80

85

90

95

100

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

I

C024

V

V

12 V to 5 V

12 V to 3.3 V

36 V to 12 V

TPS54540-Q1

www.ti.com

SLVSC56A – SEPTEMBER 2013 – REVISED OCTOBER 2013

4.5 V to 42 V Input, 5 A, Step Down DC-DC Converter with Eco-mode™

Check for Samples: TPS54540-Q1

1

FEATURES

APPLICATIONS

23

•

Qualified for Automotive Applications

•

Vehicle Accessories: GPS (See SLVA412),

Entertainment, ADAS, eCall

•

AEC-Q100 Qualified With the Following

Results:

•

USB Dedicated Charging Ports and Battery

Chargers (See SLVA464)

–

Device Temperature Grade 1: –40°C to

125°C Ambient Operating Temperature

•

Industrial Automation and Motor Control

Range

•

12 V, 24 V and 48 V Industrial, Automotive and

–

Device HBM ESD Classification Level H1C

Communications Power Systems

–

Device CDM ESD Classification Level C3B

DESCRIPTION

•

High Efficiency at Light Loads with Pulse

The TPS54540-Q1 is a 42 V, 5 A, step down

Skipping Eco-mode™

regulator with an integrated high side MOSFET. The

•

92-m

Ω High-Side MOSFET

device survives load dump pulses up to 65V per ISO

•

146

μA Operating Quiescent Current and 2 µA

7637. Current mode control provides simple external

compensation and flexible component selection. A

Shutdown Current

low ripple pulse skip mode reduces the no load

•

100 kHz to 2.5 MHz Adjustable Switching

supply current to 146

μA. Shutdown supply current is

Frequency

reduced to 2

μA when the enable pin is pulled low.

•

Synchronizes to External Clock

Undervoltage lockout is internally set at 4.3 V but can

•

Low Dropout at Light Loads with Integrated

be increased using an external resistor divider at the

BOOT Recharge FET

enable pin. The output voltage start up ramp is

•

Adjustable UVLO Voltage and Hysteresis

internally controlled to provide a controlled start up

and eliminate overshoot.

•

0.8 V 1% Internal Voltage Reference

•

8-Pin HSOIC with PowerPAD™ Package

A wide adjustable frequency range allows either

efficiency or external component size to be optimized.

•

Output current is limited cycle-by-cycle. Frequency

•

foldback and thermal shutdown protects internal and

external components during an overload condition.

The TPS54540-Q1 is available in an 8-pin thermally

enhanced HSOIC PowerPAD package.

SIMPLIFIED SCHEMATIC

EFFICIENCY vs LOAD CURRENT

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

Eco-mode, PowerPAD are trademarks of Texas Instruments.

3

WEBENCH is a registered trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.