DC2171A-A: 1 ~ 5V @ 3A, 4 ~ 20V in, Buck

Summary

Demonstration circuit 2171A-A features the LTM®4623 μModule® regulator, a tiny, low profile high performance step-down regulator. The LTM4623 has an operating input voltage range of 4V to 20V and is able to provide an output current of up to 3A. The output voltage is programmable from 0.6V to 5V.

The LTM4623 is a complete DC/DC point of load regulator in a 6.25mm × 6.25mm × 1.82mm round pad LGA package requiring only a few input and output capacitors. Output voltage tracking is available through the TRACK/SS pin for supply rail sequencing. CLKIN, CLKOUT and PHMODE pins are available for clock synchronization and interleaving.

The LTM4623 data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit 2171A-A.

Specifications

Manufacturer	Analog Devices Inc.
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	505-DC2171A-A-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	3 A
Voltage In	4 ~ 20 V
Efficiency @ Conditions	>92%, 12V in, 5V @ 1 ~ 3 A >89%, 12V in, 3.3V @ 0.8 ~ 3 A >87%, 12V in, 2.5V @ 0.7 ~ 3 A >83%, 12V in, 1.8V @ 0.6 ~ 3 A >81%, 12V in, 1.5V @ 0.5 ~ 3 A >80%, 12V in, 1.2V @ 0.7 ~ 2.3 A >75%, 12V in, 1V @ 0.5 ~ 2.9 A
Voltage Out Range	1 ~ 5 V
Features	Current Limit (Adj. or Fixed) Over Current Protection Over Voltage Protection Power Good Output Shutdown, Enable, Standby Synchronizable Thermal Protection Voltage Tracking
Switching Frequency	1 MHz
Standby Current [Typical]	11 µA
Quiescent Current [Typical]	2 mA
Component Count + Extras	21 + 25
Internal Switch	Yes
Design Author	Linear Technology
Application / Target Market	Memory Back-up Networking Power: Industrial Power Telecom
Standby Current [Maximum]	- Not Given
Quiescent Current [Maximum]	- Not Given
Main I.C. Base Part	LTM4623
Date Created By Author	2014-05
Date Added To Library	2015-05