DESCRIPTION
The LT®3742 is a dual step-down DC/DC switching regulator controller that drives high side N-channel power MOSFETs. A 500kHz fixed frequency current mode architecture provides fast transient response with simple loop compensation components and cycle-by-cycle current limiting. The output stages of the two controllers operate 180° out of phase to reduce the input ripple current, minimizing the noise induced on the input supply, and allowing less input capacitance.

FEATURES
■ Wide Input Voltage Range: 4V to 30V
■ Wide Output Voltage Range: 0.8V to VIN
■ Low Shutdown IQ: 20µA
■ Out-of-Phase Controllers Reduce Required Input
   Capacitance and Power Supply Induced Noise
■ 0.8V ±1.5% Voltage Reference
■ 500kHz Current Mode Fixed Frequency Operation
■ Internal Boost Converter Provides Bias Rail for
   N-channel MOSFET Gate Drive
■ Power Good Voltage Monitor for Each Output
■ Programmable Soft-Start
■ 24-Lead 4mm × 4mm × 0.75mm Package

APPLICATIONS
■ Satellite and Cable TV Set-Top Boxes
■ Distributed Power Regulation
■ Automotive Systems
■ Super Capacitor Charger