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 2 A

• 1.6-MHz (LMR10520X) and 3-MHz (LMR10520Y)

Switching Frequencies

• Low Shutdown IQ, 30 nA Typical

• Internal Soft Start

• Internally Compensated

• Current-Mode PWM Operation

• Thermal Shutdown

• Tiny Overall Solution Reduces System Cost

• WSON (3 × 3 × 0.8 mm) Packaging

• Create a custom design using the LMR10520 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 LMR10520 regulator is a monolithic, high

frequency, PWM step-down DC/DC converter in 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. With a minimum of

external components, the LMR10520 is easy to use.

The ability to drive 2-A loads with an internal 150-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. The LMR10520 is internally

compensated, so it is simple to use and requires few

external components. Even though the operating

frequency is high, efficiencies up to 93% are easy to

achieve. External shutdown is included, featuring an

ultra-low stand-by current of 30 nA. The LMR10520

uses current-mode control and internal compensation

to provide high-performance regulation over a wide

range of operating conditions. Additional features

include internal soft-start circuitry to reduce inrush

current, pulse-by-pulse current limit, thermal

shutdown, and output overvoltage protection.