LTC3607IUD#PBF

LTC3607 Dual 600mA 15V Monolithic Synchronous Step-Down DC/DC Regulator Description Features n n n n n n n n n n n n n n n n High Efficiency: Up to 96% Very Low Quiescent Current: 55µA Total 2.25MHz Constant Frequency Operation Low Dropout Operation: 100% Duty Cycle Low-Ripple (Typical 30mVP-P) Burst Mode® Operation Peak Current-Mode Control Architecture for Excellent Line and Load Transient Response Wide Voltage Input Range: 4.5V to 15V 600mA/Channel Rated Output Current 0.6V Reference Allows Low Output Voltages ±1.5% Output Voltage Accuracy Ultralow Shutdown Current: IQ < 1µA Internal Compensation Power Good Outputs Externally Frequency Synchronization (1MHz to 4MHz) Independent Internal Soft-Start for Each Channel Small 16-Lead Thermally Enhanced Thin QFN (3mm × 3mm) and MSE Packages The LTC®3607 is a 15V dual 600mA monolithic synchronous step-down regulator which has only 55µA quiescent current. Intended for a variety of applications, including dual lithium-ion battery products, it operates from a wide 4.5V to 15V input voltage range. It features a constant 2.25MHz switching frequency, enabling the use of tiny, low cost capacitors and inductors 1mm or less in height. Each output voltage is adjustable from 0.6V to VIN. The internal synchronous power switches provide high efficiency without the need for external Schottky diodes. A user selectable mode input is provided to allow the user to trade off ripple noise for light load efficiency; Burst Mode operation provides the highest efficiency at light loads, while pulse-skipping mode provides the lowest ripple noise. To further the maximize battery run time, the P-channel MOSFETs are turned on continuously in dropout (100% duty cycle). In shutdown, the device draws