Texas Instruments LMR62421

Description

The LMR62421 is an easy-to-use, space-efficient 2.1A low-side switch regulator ideal for Boost and SEPIC DC-DC regulation. It provides all the active functions to provide local DC/DC conversion with fasttransient response and accurate regulation in the smallest PCB area. Switching frequency is internally set to 1.6 MHz, allowing the use of extremely smallsurface mount inductor and chip capacitors while providing efficiencies near 90%. Current-mode control and internal compensation provide ease-of-use, minimal component count, and high-performance regulation over a wide range of operating conditions. External shutdown features an ultra-low standby current of 80 nA ideal for portable applications. Tiny 5-pin SOT-23 and 6-pin WSON packages provide space-savings. Additional features include internal soft-start, circuitry to reduce inrush current, pulse-by- pulse current limit, and thermal shutdown.

Features

• Input Voltage Range of 2.7V to 5.5V

• Output Voltage up to 24V

• Switch Current up to 2.1A

• 1.6 MHz Switching Frequency

• Low Shutdown Iq, 80 nA

• Cycle-by-Cycle Current Limiting

• Internally Compensated

• Internal Soft-Start

• 5-Pin SOT-23 (2.92 x 2.84 x 1mm) and 6-Pin WSON (3 x 3 x 0.8 mm) Packaging

• Fully Enabled for WEBENCH® Power Designer

• Performance Benifits:

• Extremely Easy to Use

• Tiny Overall Solution Reduces System Cost

Typical applications

• Space Constrained Applications
• LED Applications
• Embedded Systems
• LCD Displays
• Boost / SEPIC Conversions from 3.3V, 5V Rails

More information

• Datasheet
• IC product information