LTM4604A

Complete Standalone Power Supply
±1.75% Total DC Output Error (40 to 125)
Wide Input Voltage Range: 2.375V to 5.5V
4A DC, 5A Peak Output Current
0.8V to 5V Output
Output Voltage Tracking
UltraFastTM Transient Response
Power Good Indicator
Current Mode Control
Current Foldback Protection, Parallel/Current Sharing
Up to 95% Effi ciency
Programmable Soft-Start
Micropower Shutdown: I_Q 7A
Overtemperature Protection
Small and Very Low Profi le Package: 15mm * 9mm * 2.3mm LGA (0.630mm Pads)

The LTM®4604A is a complete 4A switch mode DC/DC power supply with ±1.75% total output voltage error. Included in the package are the switching controller, power FETs, inductor and all support components. Operating over an input voltage range of 2.375V to 5.5V, the LTM4604A supports an output voltage range of 0.8V to 5V, set by a single resistor. This high effi ciency design delivers up to 4A continuous current (5A peak). Only bulk output capacitors are needed to complete the design.

The 0.630mm LGA pads with 1.27mm pitch simplify PCB layout by providing standard trace routing and via placement. (The LTM4604A has smaller pads than the LTM4604.) The low profi le package (2.3mm) enables utilization of unused space on the bottom of PC boards for high density point of load regulation. High switching frequency and a current mode architecture enable a very fast transient response to line and load changes without sacrifi cing stability.

Fault protection features include foldback current protection, thermal shutdown and a programmable soft-start function. The LTM4604A is offered in a small thermally enhanced 15mm × 9mm × 2.3mm LGA package and is Pb free and RoHS compliant.