Dual 18A or Single 36A DC/DC μModule Regulator

The LTM4630A is a dual 18A or single 36A output switching mode step-down DC/DC µModule® (micromodule) regulator with wider VOUT range and higher efficiency than LTM4630. Included in the package are the switching controllers, power FETs, inductors and all supporting components. Operating from an input voltage range of 4.5V to 18V, the LTM4630A supports two outputs each with an output voltage range of 0.6V to 8V, each set by a single external resistor. Its high efficiency design delivers up to 18A continuous current for each output. Only a few input and output capacitors are needed. The LTM4630A is pin compatible with the LTM4620 and LTM4620A (dual 13A, single 26A) and the LTM4630 (dual 18A, single 36A).

The device supports frequency synchronization, multiphase operation, Burst Mode operation and output voltage tracking for supply rail sequencing and has an onboard temperature diode for device temperature monitoring. High switching frequency and a current mode architecture enable a very fast transient response to line and load changes without sacrificing stability.

Fault protection features include overvoltage and overcurrent protection. The LTM4630A is offered in 16mm × 16mm × 4.41mm LGA and 16mm × 16mm × 5.01mm BGA packages.

*Maximum VIN = 15V and VOUT = 5.3V with date code before 1720

Features

VOUT

LTM4630

0.6V to 1.8V

LTM4630-1

0.8% DC and 3% Transient Accuracy

0.6V to 1.8V

LTM4630A

Higher Light Load Efficiency

0.6V to 5.3V

Applications

* Telecom and Networking Equipment

* Storage and ATCA Cards

* Industrial Equipment

* Dual 18A or Single 36A Output

* Input Voltage Range: 4.5V to 18V (after date code 1720*)

* Output Voltage Range: 0.6V to 8V (after date code 1720*)

* ±1.5% Maximum Total DC Output Error Over Line, Load and Temperature

* Higher Light Load Efficiency and Wider VOUT Range Than LTM4630

* Differential Remote Sense Amplifier

* Current Mode Control/Fast Transient Response

* Multiphase Parallel Current Sharing Up to 144A

* Internal Temperature Monitor