LTM4603 - 6A DC/DC µModule (Power Module) with PLL, Output Tracking and Margining

The LTM4603 is a complete 6A step-down switch mode DC/DC power supply with onboard switching controller, MOSFETs, inductor and all support components. The µModule is housed in a small surface mount 15mm × 15mm × 2.8mm LGA package. Operating over an input voltage range of 4.5 to 20V, the LTM4603 supports an output voltage range of 0.6V to 5V as well as output voltage tracking and margining. The high efficiency design delivers 6A continuous current (8A peak). Only bulk input and output capacitors are needed to complete the design.

The low profile (2.8mm) and light weight (1.7g) package easily mounts on the unused space on the back side of PC boards for high density point of load regulation. The µModule can be synchronized with an external clock for reducing undesirable frequency harmonics and allows PolyPhase® operation for high load currents.

A high switching frequency and adaptive on-time current mode architecture deliver a very fast transient response to line and load changes without sacrificing stability. An onboard remote sense amplifier can be used to accurately regulate an output voltage independent of load current. The onboard remote sense amplifier is not available in the LTM4603-1. The LTM4603/LTM4603-1 are pin compatible with the 12A LTM4601/LTM4601-1.

Features

Complete Switch Mode Power Supply
Wide Input Voltage Range: 4.5V to 20V
6A DC Typical, 8A Peak Output Current
0.6V to 5V Output Voltage
Output Voltage Tracking and Margining
Remote Sensing for Precision Regulation (LTM4603 Only)
Typical Operating Frequency: 1MHz
PLL Frequency Synchronization
1.5% Regulation
Current Foldback Protection (Disabled at Start-Up)
Pin Compatible with the LTM4601
Pb-Free (e4) RoHS Compliant Package with Gold Finish Pads
Ultrafast Transient Response
Current Mode Control
Up to 93% Efficiency at 5VIN, 3.3VOUT
Programmable Soft-Start
Output Overvoltage Protection
Small Footprint, Low Profile (15mm × 15mm × 2.8mm) Surface Mount LGA Package

Typical Application

Applications

Telecom and Networking Equipment
Servers
Industrial Equipment
Point of Load Regulation

Packaging

**Order Information**
Part Number	Package	Temp	Price(1-99)	Price (1k)*
LTM4603EV-1#PBF	15mm × 15mm x 2.82mm LGA	E	$19.66	$12.95
LTM4603EV#PBF	15mm × 15mm x 2.82mm LGA	E	$20.49	$13.50
LTM4603IV-1#PBF	15mm × 15mm x 2.82mm LGA	I	$21.63	$14.25
LTM4603IV#PBF	15mm × 15mm x 2.82mm LGA	I	$22.54	$14.85

Demo Boards


Part Number	Description	Price
DC1083A-A	LTM4603 Demo Board \| Step-Down μModule Regulator, 4.5V ≤ VIN ≤ 20V, Vout = 0.6V/1.2V/1.5V/1.8V/2.5V/3.3V/5V @ 6A	$65.00
DC1540B	LTC2977 Demo Board Set: Eight uModule Power Supply Management (includes DC1360B + DC1361B) [Requires DC1613]	$200.00