LTC3734EUH

IC CTRLR DC-DC 1PH HI EFF 32QFN

DESCRIPTION

The LTC®3734 is a single-phase synchronous step-down switching regulator controller that drives all N-channel power MOSFETs in a constant frequency architecture. The output voltage is programmable by six VID bits during normal operation and by external resistors during initial

boot-up and deeper sleep state. The LTC3734 drives its output stage at frequencies up to 550kHz. Powerful on chip gate drivers eliminate the need for external gate driver ICs, thus simplifying the design.

FEATURES

■ Wide Input Voltage Range: 4V to 30V

■ ±1% Output Voltage Accuracy

■ 6-Bit IMVP-IV VID Code: VOUT= 0.7V to 1.708V

■ Intel Compatible Power Saving Mode PSIB

■ Power Good Output with Adaptive Masking

■ Lossless Voltage Positioning

■ Resistor Programmable VOUTat Boot-Up and Deeper Sleep State

■ Resistor Programmable Deep Sleep Offset

■ Programmable Fixed Frequency: 210kHz to 550kHz

■ Adjustable Soft-Start Current Ramping

■ Foldback Output Current Limit

■ Short-Circuit Shutdown Timer with Defeat Option

■ Overvoltage Protection

■ Available in 32-Lead 5mm ×5mm ×0.8mm Profile QFN Package

APPLICATIONS

■ Mobile and Desktop Computers

■ Internet Servers