DESCRIPTION
The LTC®3416 is a high efficiency monolithic synchronous, step-down DC/DC converter utilizing a constant frequency, current mode architecture. It operates from an input voltage range of 2.25V to 5.5V and provides a regulated output voltage from 0.8V to 5V while delivering up to 4A of output current. The internal synchronous power switch with 67mΩ of on-resistance increases efficiency and eliminates the need for an external Schottky diode. Switching frequency is set by an external resistor. 100% duty cycle provides low dropout operation extending battery life in portable systems. OPTI-LOOP® compensation allows the transient response to be optimized over a wide range of loads and output capacitors.

FEATURES
■ High Efficiency: Up to 95%
■ 4A Output Current
■ Low RDS(ON) Internal Switch: 67mΩ
■ Tracking Input to Provide Easy Supply Sequencing
■ Programmable Frequency: 300kHz to 4MHz
■ 2.25V to 5.5V Input Voltage Range
■ ±2% Output Voltage Accuracy
■ 0.8V Reference Allows Low Output Voltage
■ Low Dropout Operation: 100% Duty Cycle
■ Power Good Output Voltage Monitor
■ Overtemperature Protected
■ Available in a 20-Lead Thermally Enhanced TSSOP Package

APPLICATIONS
■ Portable Instruments
■ Notebook Computers
■ Distributed Power Systems
■ Battery-Powered Equipment
■ POL Board Power