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


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.


Manufacturer Linear Technology/Analog Devices
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
Eval Board Part Number DC1669A-ND
Eval Board Supplier Linear Technology/Analog Devices
Eval Board Normally In Stock
Topology Step Down
Outputs and Type 1 Non-Isolated
Output Voltage: 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
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
Standby Current [Maximum]
Quiescent Current [Maximum]
Main I.C. Base Part LTM4627EV

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