DC1724A: 5V @ 600mA, 5.6 ~ 36V in

Summary

DC1724A is a µModule® step-down converter, featuring the LTM8029, which consumes only 5µA of quiescent current. The demo circuit is designed for a 5V, 600mA output at an operating frequency of 600 kHz. The input voltage range is from 5.6V to 36V. Equipped with an off-time skipping capability, the LTM8029 can operate at input voltages lower than other step-down regulators.

The wide input range of the LTM8029 allows a variety of input sources such as automotive batteries and industrial supplies. Its current mode control scheme creates fast transient response and good loop stability. At light loads, the LTM8029 operates in Burst Mode® operation to maintain high efficiency and low output ripple over a broad current range. To provide a programmable undervoltage lockout, users can remove jumper JP1 and populate R1 and R3 on the RUN pin.

The LTM8029 data sheet gives a complete description of the part, operation and application information. The data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit DC1724A.

Specifications

Manufacturer	Analog Devices Inc.
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	505-DC1724A-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	5 V
Current Out	600 mA
Voltage In	5.6 ~ 36 V
Efficiency @ Conditions	>85%, 12V in, 5V @ 160 ~ 600 mA >80%, 24V in, 5V @ 260 ~ 600 mA >75%, 36V in, 5V @ 280 ~ 600 mA
Voltage Out Range	1.2 ~ 18 V
Features	Light Load Mode Power Good Output Shutdown, Enable, Standby Under Voltage Protection, Brown-Out
Switching Frequency	600 kHz
Standby Current [Typical]	900 nA
Quiescent Current [Typical]	5 µA
Component Count + Extras	8 + 18
Internal Switch	Yes
Design Author	Linear Technology
Application / Target Market	Automotive Point of Load (PoL) Portable Devices Power: Auxiliary Power Supply Power: Industrial Power
Standby Current [Maximum]	- Not Given
Quiescent Current [Maximum]	9 µA
Main I.C. Base Part	LTM8029
Date Created By Author	2011-11
Date Added To Library	2013-12