DC1856A-B: 1 ~ 3.3V @ 10A, 4.5 ~ 16V in, Buck

Summary

Demonstration circuit 1856A-B features the LTM®4649EY μModule® regulator, a high performance, high efficiency step-down regulator. The LTM4649EY has an operating input voltage range of 4.5V to 16V and is able to provide an output current of up to 10A. The output voltage is programmable from 0.6V to 5V and can be remotely sensed with the internal differential remote sensing amplifier.

The LTM4649EY is a complete DC/DC point-of-load regulator in a thermally enhanced 15mm × 9mm × 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. External clock synchronization is also available through the CLKIN pin.

The LTM4649 data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit 1856A-B.

Specifications

Manufacturer Analog Devices Inc.
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
Eval Board Part Number DC1856A-B-ND
Eval Board Supplier Analog Devices Inc.
Eval Board Board not Stocked
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
Current Out 10 A
Voltage In 4.5 ~ 16 V
Efficiency @ Conditions >95%, 5V in, 3.3V @ 3.6 ~ 10 A
>93%, 5V in, 2.5V @ 4 ~ 10 A
>92%, 5V in, 1.8V @ 2.8 ~ 10 A
>90%, 5V in, 1.5V @ 2.4 ~ 10 A
>88%, 5V in, 1.2V @ 2.2 ~ 10 A
>86%, 5V in, 1V @ 2 ~ 10 A
Voltage Out Range 0.6 ~ 3.3 V
Features Current Limit (Adj. or Fixed)
Current Sharing
Light Load Mode
Over Current Protection
Over Voltage Protection
Power Good Output
Remote Sensing
Shutdown, Enable, Standby
Soft Start
Synchronizable
Thermal Protection
Voltage Tracking
Switching Frequency 450 kHz
Standby Current [Typical] 70 µA
Quiescent Current [Typical] 75 mA
Component Count + Extras 13 + 29
Internal Switch Yes
Design Author Linear Technology
Application / Target Market Networking
Point of Load (PoL)
Power: Industrial Power
Telecom
Standby Current [Maximum] - Not Given
Quiescent Current [Maximum] - Not Given
Main I.C. Base Part LTM4649
Date Created By Author 2012-06
Date Added To Library 2015-06

Support Documents & Media

DC1865A-B - User Guide LTM4649 - Datasheet

Media

DC1856A_B_Schematic_Full.png DC1856A_B_Board_1_Full.png DC1856A_B_Board_2_Full.jpg DC1856A_B_Chart_1_Full.png DC1856A_B_Chart_2_Full.png DC1856A_B_Chart_3_Full.png