Descripion:

The LTM®4615 is a complete 4A dual output switchingmode 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 4ADC/DC converters operate over an input voltage range of2.375V to 5.5V, and the VLDO operates from a 1.14V to3.5V input. The LTM4615 supports output voltages ranging from 0.8V to 5V for the DC/DC converters, and 0.4Vto 2.6V for the VLDO. The three regulator output voltagesare set by a single resistor for each output. Only bulk inputand output capacitors are needed to complete the design.The low profile package (2.82mm) enables utilization ofunused space on the bottom of PC boards for high densitypoint of load regulation. High switching frequency and acurrent mode architecture enables a very fast transientresponse to line and load changes without sacrificingstability. The device supports output voltage tracking forsupply rail sequencing.Additional features include overvoltage protection, overcurrent protection, thermal shutdown and programmablesoft-start. The power module is offered in a space savingand thermally enhanced 15mm × 15mm × 2.82mm LGApackage. The LTM4615 is RoHS compliant with Pb-freefinish.

Feaures:

Dual 4A Output Power Supply with 1.5A VLDO™

Short-Circuit and Overtemperature Protectionn 

Power Good Indicators

Switching Regulators Section—Current Mode Controln 

Input Voltage Range: 2.375V to 5.5Vn 

4A DC Typical, 5A Peak Output Current Eachn 

0.8V Up to 5V Output Each, Parallelablen 

±2% Total DC Output Errorn 

Output Voltage Trackingn 

Up to 95% Efficiencyn 

Programmable Soft-Start

VLDO Sectionn 

VLDO, 1.14V to 3.5V Input Rangen 

VLDO, 0.4V to 2.6V, 1.5A Outputn 

VLDO, 40dB Supply Rejection at fSWn 

±1% Total DC Output Errorn 

Small and Very Low Profile Package:15mm × 15mm × 2.82mm

Applications:

Telecom and Networking Equipmentn 

Industrial Power Systemsn 

Low Noise Applicationsn 

FPGA, SERDES Power