DC2131A: 0 ~ 14.5V @ 5A, 4 ~ 15V in

Summary

Demonstration circuit 2131A is a current mode DC/DC step-down Silent Switcher® buck regulator featuring the LTC®3623. The board operates from an input range of 4V to 15V, and provides ±5A of output current. The output voltage of the demonstration board can be set from 0V to VIN - 0.5V.

It operates at 1MHz and may be synchronized to an external clock. A soft-start feature controls output voltage slew rate at start-up, reducing current surge and voltage overshoot. A power good output and current monitor signal are provided. Discontinuous conduction mode can be selected with a jumper. The demonstration board has options for cable drop compensation, negative output voltage and input voltage regulation.

This board is suitable for a wide range of battery-powered, point-of-load, DDR memory, Thermo Electric Cooler (TEC) systems and other applications. The LTC3623 is available in a low profile, 24-pin QFN package. For other output requirements, see the LTC3623 data sheet.

Specifications

Manufacturer	Analog Devices Inc.
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	505-DC2131A-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	0 ~ (Vin - 0.5 V)
Current Out	5 A
Voltage In	4 ~ 15 V
Efficiency @ Conditions	>90%, 12V in, 5V @ 0.1 ~ 5 A
Voltage Out Range	0 ~ 14.5 V
Features	Current Foldback Protection Light Load Mode Over Voltage Protection Power Good Output Short Circuit Protection Shutdown, Enable, Standby Soft Start Synchronizable Thermal Protection
Switching Frequency	400 kHz ~ 4 MHz
Standby Current [Typical]	1 µA
Quiescent Current [Typical]	1.5 mA
Component Count + Extras	25 + 45
Internal Switch	Yes
Design Author	Linear Technology
Application / Target Market	Memory Back-up Point of Load (PoL) Portable Devices
Standby Current [Maximum]	5 µA
Quiescent Current [Maximum]	1.75 mA
Main I.C. Base Part	LTC3623
Date Created By Author	2016-11
Date Added To Library	2018-04