DC1889A: 0.6 ~ 5.5V @ 4A, 4 ~ 14V in

Summary

Demonstration circuit 1889A features the LTM®4624EY μModule regulator, a tiny high performance high efficiency step-down regulator.

The LTM4624EY has an operating input voltage range of 4V to 14V and is able to provide an output current of up to 4A. The output voltage is programmable from 0.6V to 5V.

The LTM4624EY is a complete DC-DC point of load regulator in a thermally enhanced 6.25mm x 6.25mm x 5.01mm BGA package requiring only a few input and output capacitors. Output voltage tracking is available through the TRACK/SS pin for supply rail sequencing.

The LTM4624 datasheet must be read in conjunction with this demo manual for working on or modifying demo circuit 1889A.

Specifications

Manufacturer	Analog Devices Inc.
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	505-DC1889A-ND
Eval Board Supplier	Analog Devices Inc.
Eval Board	Normally In Stock
Topology	Step Down
Outputs and Type	1 Non-Isolated
Voltage Out: Factory Set	1 V 1.2 V 1.5 V 1.8 V 2.5 V 3.3 V 5 V
Current Out	4 A
Voltage In	4 ~ 14 V
Efficiency @ Conditions	>90%, 5V in, 3.3V @ 0.2 ~ 4 A >90%, 5V in, 2.5V @ 0.3 ~ 3.2 A >90%, 12V in, 5V @ 1 ~ 4 A >85%, 5V in, 1V @ 0.5 ~ 2.1 A >85%, 5V in, 1.5V @ 0.3 ~ 3.4 A >85%, 5V in, 1.2V @ 0.4 ~ 2.7 A >85%, 12V in, 3.3V @ 0.7 ~ 4 A >85%, 12V in, 2.5V @ 0.8 ~ 4 A >80%, 12V in, 1V @ 1.1 ~ 2.4 A >80%, 12V in, 1.5V @ 0.7 ~ 4 A >80%, 12V in, 1.2V @ 0.9 ~ 3.4 A
Voltage Out Range	0.6 ~ 5.5 V
Features	Current Limit (Adj. or Fixed) Over Current Protection Over Voltage Protection Power Good Output Shutdown, Enable, Standby Soft Start Thermal Protection Under Voltage Protection, Brown-Out Voltage Tracking
Switching Frequency	1 MHz
Standby Current [Typical]	11 µA
Quiescent Current [Typical]	2 mA
Component Count + Extras	10 + 49
Internal Switch	Yes
Design Author	Linear Technology
Application / Target Market	Factory Automation Medical Memory Back-up Telecom
Standby Current [Maximum]	- Not Given
Quiescent Current [Maximum]	6 mA
Main I.C. Base Part	LTM4624
Date Created By Author	2013-04
Date Added To Library	2013-10