LM26400Y

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM26400Y SNVS457D – FEBRUARY 2007 – REVISED OCTOBER 2015 LM26400Y Dual 2-A, 500-kHz Wide Input Range Buck Regulator 1 Features 1 Input Voltage Range of 3 V to 20 V Dual 2-A Output Output Voltage Down to 0.6 V Internal Compensation 500-kHz PWM Frequency Separate Enable Pins Separate Soft-Start Pins Frequency Foldback Protection 175-mΩ NMOS Switch Integrated Bootstrap Diodes Overcurrent Protection HTSSOP and WSON Packages Thermal Shutdown 2 Applications DTV-LCD Set-Top Boxes XDSL Automotive Computing Peripherals Industrial Controls Points-of-Load 3 Description The LM26400Y device is a monolithic, two-output fixed-frequency PWM step-down DC-DC regulator, in a 16-pin WSON or thermally-enhanced HTSSOP package. With a minimum number of external components and internal loop compensation, the LM26400Y is easy to use. The ability to drive 2-A loads with an internal 175-mΩ NMOS switch using state-of-the-art 0.5-µm BiCMOS technology results in a high-power density design. The world class control circuitry allows for an ONtime as low as 40 ns, thus supporting high-frequency conversion over the entire input range of 3 V to 20 V and down to an output voltage of only 0.6 V. The LM26400Y utilizes peak current-mode control and internal compensation to provide high-performance regulation over a wide range of line and load conditions. Switching frequency is internal...