1 Features

1• Input Voltage Range of 3 V to 5.5 V

• Output Voltage Range of 0.6 V to 4.5 V

• Output Current up to 1 A

• 1.6-MHz (LMR10510X) and 3-MHz (LMR10510Y)

Switching Frequencies

• Low Shutdown IQ, 30 nA Typical

• Internal Soft Start

• Internally Compensated

• Current-Mode PWM Operation

• Thermal Shutdown

• SOT-23 (2.92 × 2.84 × 1 mm) and WSON

(3 × 3 × 0.8 mm) Packaging

• Tiny Overall Solution Reduces System Cost

• Create a custom design using the LMR10510 with

the WEBENCH® Power Designer

2 Applications

• Point-of-Load Conversions from 3.3-V- and 5-V

Rails

• Space Constrained Applications

• Battery Powered Equipment

• Industrial Distributed Power Applications

• Power Meters

• Portable Hand-Held Instruments

3 Description

The LMR10510 regulator is a monolithic, high

frequency, PWM step-down DC/DC converter in a 5-

pin SOT-23 and a 6-pin WSON package. It provides

all the active functions to provide local DC/DC

conversion with fast transient response and accurate

regulation in the smallest possible PCB area. The

LMR10510 is internally compensated, so it is simple

to use and requires few external components. The

ability to drive 1-A loads with an internal 130-mΩ

PMOS switch results in the best power density

available. The world-class control circuitry allows ontimes as low as 30 ns, thus supporting exceptionally

high frequency conversion over the entire 3-V to 5.5-

V input operating range down to the minimum output

voltage of 0.6 V.

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