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1 Features

1? Input Voltage Range of 3 V to 20 V

? Output Voltage Range of 0.8 V to 17 V

? Output Current up to 1 A

? 1.6 MHz (LMR12010X) and 3 MHz (LMR12010Y)

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

? Thin 6-Pin SOT-23 Package (2.97 × 1.65 × 1 mm)

? Create a custom design using the LMR12010 with

the WEBENCH? Power Designer

2 Applications

? Point-of-Load Conversions from 3.3-V, 5-V, and

12-V Rails

? Space Constrained Applications

? Battery Powered Equipment

? Industrial Distributed Power Applications

? Power Meters

? Portable Hand-Held Instruments

3 Description

The LMR12010 regulator is a monolithic, high

frequency, PWM step-down DC/DC converter in a 6-

pin thin SOT23 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 and online

design support through WEBENCH, the LMR12010 is

easy to use. The ability to drive 1-A loads with an

internal 300-mΩ NMOS switch using state-of-the-art

0.5-μm BiCMOS technology results in the best power

density available. The world class control circuitry

allows for on-times as low as 13 ns, thus supporting

exceptionally high frequency conversion over the

entire 3-V to 20-V input operating range down to the

minimum output voltage of 0.8 V. Switching frequency

is internally set to 1.6 MHz (LMR12010X) or 3 MHz

(LMR12010Y), allowing the use of extremely small

surface mount inductors and chip capacitors. Even

though the operating frequencies are very high,

efficiencies up to 90% are easy to achieve. External

shutdown is included, featuring an ultra-low standby

current of 30 nA. The LMR12010 utilizes currentmode

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.