DC1194A: 3.3V @ 200mA, 4.5 ~ 36V in, Inductor On-Chip

Summary

Demonstration circuit DC1194A features the LTM®8020, a 200mA DC/DC step-down μModule® regulator. The board is preset to deliver a 3.3V output at up to 200mA load current from an input voltage of up to 36V. The output voltage may be modified by simply changing one resistor.

The LTM®8020 is a complete 200mA, DC/DC step-down power supply. Included in the package are the switching controller, power switches, inductor, and all support components. Operating over an input voltage range of 4V to 36V, the LTM8020 supports an output voltage range of 1.25V to 5V, set by a single resistor. Only bulk capacitors are needed to finish the design. The LTM8020 meets the radiated emissions requirements of EN55022. Conducted emission requirements can be met by adding standard filter components.

The low profile (2.32mm) tiny package enables utilization of unused space on the bottom of PC boards for high density point of load regulation.

Specifications

Manufacturer	Analog Devices Inc.
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	DC1194A-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	3.3 V
Current Out	200 mA
Voltage In	4.5 ~ 36 V
Efficiency @ Conditions	>82%, 5V in, 3.3V @ 10 ~ 200 mA >73%, 12V in, 3.3V @ 4 ~ 200 mA >67%, 24V in, 3.3V @ 3 ~ 200 mA >64%, 36V in, 3.3V @ 4 ~ 200 mA
Voltage Out Range	1.25 ~ 5 V
Features	Internal Inductor Light Load Mode
Switching Frequency	450 kHz
Standby Current [Typical]
Quiescent Current [Typical]	35 µA
Component Count + Extras	4 + 8
Internal Switch	Yes
Design Author	Linear Technology
Application / Target Market	Automotive Point of Load (PoL) Portable Devices
Standby Current [Maximum]	1 µA
Quiescent Current [Maximum]	50 µA
Main I.C. Base Part	LTM8020
Date Created By Author
Date Added To Library	2012-04