Features: High Effi ciency Dual Step-Down Outputs: Up to 96% 600mA Current per Channel at VIN = 3V Only 35A Quiescent Current During Operation (Both Channels) 2.25MHz Constant-Frequency Operation 2.5V to 5.5V Input Voltage Range Low Dropout Operation: 100% Duty Cycle No Schottky Diodes Required ...
LTC3419: Features: High Effi ciency Dual Step-Down Outputs: Up to 96% 600mA Current per Channel at VIN = 3V Only 35A Quiescent Current During Operation (Both Channels) 2.25MHz Constant-Frequency Operation ...
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The LTC®3419 is a dual, 2.25MHz, constant-frequency, synchronous step-down DC/DC converter in a tiny 3mm * 3mm DFN package. 100% duty cycle provides low dropout operation, extending battery life in portable systems. Low output voltages are supported with the 0.6V feedback reference voltage. Each regulator can supply 600mA output current.
The input voltage range of LTC3419 is 2.5V to 5.5V, making it ideal for Li-Ion and USB powered applications. Supply current during operation is only 35A and drops to <1A in shutdown. A user-selectable mode input allows the user to trade off between high effi ciency Burst Mode operation and pulse-skipping mode.
An internally set 2.25MHz switching frequency allows the use of tiny surface mount inductors and capacitors. Internal soft-start reduces inrush current during start-up. Both outputs are internally compensated to work with ceramic output capacitors. The LTC3419 is available in a low profi le (0.75mm) 3mm * 3mm DFN package. The LTC3419 is also available in a fi xed output voltage confi guration selected via internal resistor dividers (see Table 2).