1 Features

• 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 

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 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.

Device Information

1. For all available packages, see the orderable addendum at the end of the data sheet.

Device Images

Typical Application