DC1198A-A: 12V @ 5A, 4.5 ~ 20V in

Summary

Demonstration circuit DC1198A-A features the LTM®4605EV, the high efficiency, high density switch mode buck-boost μModule® regulator. The LTM4605EV can regulate its output voltage from an input voltage above, below, or equal to the output. The input voltage range of DC1198A-A is from 4.5V to 20V with a preset output voltage of 12V. The rated load current is 5A, although derating is necessary for certain VIN, VOUT, and thermal conditions.

The switching frequency may be synchronized to an external clock from 200kHz to 400kHz. This PLL can be used not only to reduce undesirable frequency harmonics but also to parallel LTM4605 to provide high output current.

The LTM4605 data sheet must be read in conjunction with this demo manual prior to working on or modifying DC1198A-A.

Specifications

Manufacturer	Analog Devices Inc.
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	DC1198A-A-ND
Eval Board Supplier	Analog Devices Inc.
Eval Board	Board not Stocked
Topology	Step Up/Down
Outputs and Type	1 Non-Isolated
Voltage Out: Factory Set	12 V
Current Out	5 A
Voltage In	4.5 ~ 20 V
Efficiency @ Conditions	>95%, 12V in, 12V @ 1 ~ 12 A >93%, 20V in, 12V @ 1 ~ 12 A >90%, 5V in, 12V @ 0.2 ~ 4.3 A
Voltage Out Range	- Fixed
Features	Current Foldback Protection Current Limit (Adj. or Fixed) Light Load Mode PFM or PWM Power Good Output
Switching Frequency	300 kHz
Standby Current [Typical]	35 µA
Quiescent Current [Typical]	2.8 mA
Component Count + Extras	17 + 29
Internal Switch	Yes
Design Author	Linear Technology
Application / Target Market	Automotive Servers Telecom
Standby Current [Maximum]	60 µA
Quiescent Current [Maximum]
Main I.C. Base Part	LTM4605
Date Created By Author	2011-01
Date Added To Library	2012-05