深圳市中立信电子科技有限公司

1 Features 3 Description

The LM26400Y device is a monolithic, two-output

1• Input Voltage Range of 3 V to 20 V

fixed-frequency PWM step-down DC-DC regulator, in

• Dual 2-A Output a 16-pin WSON or thermally-enhanced HTSSOP

• Output Voltage Down to 0.6 V package. With a minimum number of external

• Internal Compensation components and internal loop compensation, the

LM26400Y is easy to use.

• 500-kHz PWM Frequency

• Separate Enable Pins The ability to drive 2-A loads with an internal 175-mΩ

NMOS switch using state-of-the-art 0.5-μm BiCMOS

• Separate Soft-Start Pins technology results in a high-power density design.

• Frequency Foldback Protection The world class control circuitry allows for an ON•

175-mΩ NMOS Switch time as low as 40 ns, thus supporting high-frequency

conversion over the entire input range of 3 V to 20 V • Integrated Bootstrap Diodes and down to an output voltage of only 0.6 V. The

• Overcurrent Protection LM26400Y utilizes peak current-mode control and

• HTSSOP and WSON Packages internal compensation to provide high-performance

• Thermal Shutdown regulation over a wide range of line and load

conditions. Switching frequency is internally set to

500 kHz, optimal for a broad range of applications in 2 Applications terms of size versus thermal tradeoffs.

• DTV-LCD

Given a nonsynchronous architecture, efficiencies

• Set-Top Boxes above 90% are easy to achieve. External shutdown is

• XDSL included, enabling separate turnon and turnoff of the

• Automotive two channels. Additional features include

programmable soft-start circuitry to reduce inrush

• Computing Peripherals current, pulse-by-pulse current limit and frequency

• Industrial Controls foldback, integrated bootstrap structure, and thermal

• Points-of-Load shutdown.