DC1669A: 1 ~ 3.3V @ 15A, 4.5 ~ 20V in, Inductor On-Chip

Summary

Demonstration circuit 1669A features the LTM®4627EV μModule® regulator, a high performance high efficiency step-down regulator. The LTM4627EV has an operating input voltage range of 4.5V to 20V and is able to provide an output current of up to 15A.

The output voltage is programmable from 0.6V to 5V and can be remotely sensed with the internal optional differential remote sensing amplifier. The LTM4627EV is a complete DC/DC point-of-load regulator in a thermally enhanced 15mm × 15mm × 4.32mm LGA package requiring only a few input and output capacitors.

It supports frequency synchronization and Burst Mode® operation for increased light-load efficiency. Output voltage tracking is also available through the TRACK/SS pin for supply rail sequencing. The LTM4627 data sheet must be read in conjunction with this demo manual for working on or modifying demo circuit 1669.

Specifications

Manufacturer Analog Devices Inc.
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
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 15 A
Voltage In 4.5 ~ 20 V
Efficiency @ Conditions >91%, 12V in, 3.3V @ 5 ~ 15 A
>89%, 12V in, 2.5V @ 5 ~ 15 A
>87%, 18V in, 3.3V @ 4 ~ 15 A
>87%, 12V in, 1.8V @ 4 ~ 15 A
>85%, 18V in, 2.5V @ 4 ~ 15 A
>85%, 18V in, 1.8V @ 6.5 ~ 15 A
>85%, 12V in, 1.5V @ 4 ~ 15 A
>83%, 18V in, 1.5V @ 6 ~ 15 A
Voltage Out Range 0.6 ~ 5 V
Features Internal Inductor
Light Load Mode
Over Current Protection
Over Voltage Protection
Remote Sensing
Soft Start
Synchronizable
Voltage Tracking
Switching Frequency 500 kHz
Standby Current [Typical] 40 µA
Quiescent Current [Typical] 54 mA
Component Count + Extras 12 + 46
Internal Switch Yes
Design Author Linear Technology
Application / Target Market Medical
Telecom
Standby Current [Maximum]
Quiescent Current [Maximum]
Main I.C. Base Part LTM4627EV
Date Created By Author 2004-02
Date Added To Library 2011-03

Support Documents & Media

DC1669A - User Guide LTM4627 - Datasheet LTM4627 - LTspice Demo Circuit

Media

DC1669A_Schematic_Full.jpg DC1669A_Board_Full.JPG DC1669A_Thermal_Full.JPG DC1669A_Chart_2_Full.JPG DC1669A_Chart_1_Full.JPG