0.00

0.05

0.10

0.15

0.20

0.25

0.30

0

10

20

30

40

50

60

70

80

90

100

LOAD CURRENT (A)

1.2Vout

3.3Vout

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0

10

20

30

40

50

60

70

80

90

100

LOAD CURRENT (A)

1.2Vout

3.3Vout

LMR14203

www.ti.com

SNVS732C – OCTOBER 2011 – REVISED APRIL 2013

Check for Samples: LMR14203

1

FEATURES

DESCRIPTION

The LMR14203 is a PWM DC/DC buck (step-down)

2

•

Input Voltage Range of 4.5V to 42V

regulator. With a wide input range from 4.5V-42V, it is

•

Output Voltage Range of 0.765V to 34V

suitable for a wide range of applications such as

•

Output Current up to 0.3A

power conditioning from unregulated sources. They

•

1.25 MHz Switching Frequency

maximum

efficiency

(85%

typical).

Operating

•

Low Shutdown Iq, 16 µA Typical

frequency is fixed at 1.25 MHz allowing the use of

•

Short Circuit Protected

small external components while still being able to

have low output voltage ripple. Soft-start can be

•

Internally Compensated

implemented using the shutdown pin with an external

•

Soft-Start Function

RC circuit allowing the user to tailor the soft-start time

•

Thin SOT-23-6 Package (2.97 x 1.65 x 1mm)

to a specific application.

•

Fully Enabled for WEBENCH® Power Designer

The LMR14203 is optimized for up to 300 mA load

current.

PERFORMANCE BENEFITS

•

Tight Accuracy for Powering Digital ICs

under-voltage lockout, and gate drive under-voltage

•

Extremely Easy to Use

lockout. The LMR14203 is available in a low profile

SOT-6L package.

•

Tiny Overall Solution Reduces System Cost

APPLICATIONS

•

Point-of-Load Conversions from 5V, 12V, and

24V Rails

•

Space Constrained Applications

•

Battery Powered Equipment

•

Industrial Distributed Power Applications

•

Power Meters

•

Portable Hand-Held Instruments

System Performance

Efficiency vs Load Current

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

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2011–2013, 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.