LTC3619B

LTC3619B 400mA/800mA Synchronous Step-Down DC/DC with Average Input Current Limit Features Description n Programmable Average Input Current Limit: ±5% Accuracy n Dual Step-Down Outputs: Up to 96% Efficiency n Low Noise Pulse-Skipping Operation at Light Loads n Input Voltage Range: 2.5V to 5.5V n Output Voltage Range: 0.6V to 5V n 2.25MHz Constant-Frequency Operation n Power Good Output Voltage Monitor for Each Channel n Low Dropout Operation: 100% Duty Cycle n Independent Internal Soft-Start for Each Channel n Current Mode Operation for Excellent Line and Load Transient Response n ±2% Output Voltage Accuracy n Short-Circuit Protected n Shutdown Current ≤ 1μA n Available in Small Thermally Enhanced 10-Lead MS and 3mm × 3mm DFN Packages Applications n High Peak Load Current Applications n USB Powered Devices n Supercapacitor Charging n Radio Transmitters and Other Handheld Devices L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks and Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 5481178, 6127815, 6304066, 6498466, 6580258, 6611131. The LTC®3619B is a dual monolithic synchronous buck regulator using a constant frequency current mode architecture. The input supply voltage range is 2.5V to 5.5V, making it ideal for Li-Ion and USB powered applications. 100% duty cycle capability provides low dropout operation, extending...