DC1261A: 3.3V @ 1 A, 4.5 ~ 36V in

Summary

Demonstration circuit 1261A features the LTM®8022 stepdown μModule® regulator delivering a 3.3V output from a 4.5V to 36V input supply.

As a step-down converter, the LTM8022 requires a minimum amount of headroom to keep the output in regulation. The device may be synchronized to an external clock or allowed to enter low ripple Burst Mode® operation at light load conditions by applying the appropriate signal to the SYNC pin. Current sharing with another LTM8022 is enabled by tying the VIN, VOUT and SHARE pins together to support higher output loads.

The LTM8022 data sheet must be read in conjunction with demo manual prior to working on or modifying demo circuit DC1261A.

Specifications

Manufacturer Analog Devices Inc.
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
Eval Board Part Number DC1261A-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 1 A
Voltage In 4.4 ~ 36 V
Efficiency @ Conditions >85%, 5V in, 3.3V @ 0.17 ~ 1 A
>80%, 12V in, 3.3V @ 0.1 ~ 1 A
>78%, 24V in, 3.3V @ 0.2 ~ 1 A
>75%, 36V in, 3.3V @ 0.23 ~ 1 A
Voltage Out Range - Fixed
Features Frequency Foldback
Light Load Mode
PFM or PWM
Power Good Output
Soft Start
Switching Frequency 600 kHz
Standby Current [Typical] 100 nA
Quiescent Current [Typical] 25 µA
Component Count + Extras 10 + 15
Internal Switch Yes
Design Author Linear Technology
Application / Target Market Automotive
Portable Devices
Power: AC Adapters
Standby Current [Maximum] 500 nA
Quiescent Current [Maximum] 350 µA
Main I.C. Base Part LTM8022
Date Created By Author 2011-05
Date Added To Library 2012-06

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Support Documents & Media

DC1261A - User Guide LTM8022 - Data Sheet

Media

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