DESCRIPTION
The LTM®4615 is a complete 4A dual output switching mode DC/DC power supply plus an additional 1.5A VLDO (very low dropout) linear regulator. Included in the package are the switching controllers, power FETs, inductors, a 1.5A regulator and all support components. The dual 4A DC/DC converters operate over an input voltage range of 2.375V to 5.5V, and the VLDO operates from a 1.14V to 3.5V input. The LTM4615 supports output voltages ranging from 0.8V to 5V for the DC/DC converters, and 0.4V to 2.6V for the VLDO. The three regulator output voltages are set by a single resistor for each output. Only bulk input and output capacitors are needed to complete the design.

FEATURES
■ Dual 4A Output Power Supply with 1.5A VLDO™
■ Short-Circuit and Overtemperature Protection
■ Power Good Indicators

Switching Regulators Section—Current Mode Control
■ Input Voltage Range: 2.375V to 5.5V
■ 4A DC Typical, 5A Peak Output Current Each
■ 0.8V Up to 5V Output Each, Parallelable
■ ±2% Total DC Output Error
■ Output Voltage Tracking
■ Up to 95% Effi ciency
■ Programmable Soft-Start

VLDO Section
■ VLDO, 1.14V to 3.5V Input Range
■ VLDO, 0.4V to 2.6V, 1.5A Output
■ VLDO, 40dB Supply Rejection at fSW
■ ±1% Total DC Output Error
■ Small and Very Low Profi le Package:
   15mm × 15mm × 2.82mm

APPLICATIONS
■ Telecom and Networking Equipment
■ Industrial Power Systems
■ Low Noise Applications
■ FPGA, SERDES Power