DC2569A: 12V @ 1A, 1.8 ~ 5.5V in, Boost

Summary

Demonstration circuit 2569A is ultrathin step-up µModule regulator featuring the LTM4661. The DC2569A operates over 1.8V to 5.5V input and it generates 12V, 1A output from 5V input. Also, the LTM4661 has precision voltage reference, which can generate output voltage with 3% tolerance over the full operating conditions. The 1MHz switching frequency operation results in small and efficient circuit. The converter operates with only one phase in burst mode and achieves over 80% efficiency with 100mA load. The demonstration circuit can be easily modified to generate different output voltages.

The LTM4661 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 for DC2569A.

Specifications

Manufacturer	Analog Devices Inc.
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	505-DC2569A-ND
Eval Board Supplier	Analog Devices Inc.
Eval Board	Normally In Stock
Topology	Step Up
Outputs and Type	1 Non-Isolated
Voltage Out: Factory Set	12 V
Current Out	1 A
Voltage In	1.8 ~ 5.5 V
Efficiency @ Conditions	>89%, 5V in, 12V @ 0.3 ~ 0.8 A
Voltage Out Range	2.5 ~ 15 V
Features	Frequency Foldback Light Load Mode Power Good Output Short Circuit Protection Shutdown, Enable, Standby Soft Start Spread Spectrum Modulation Synchronizable Thermal Protection Voltage Tracking
Switching Frequency	1 MHz
Standby Current [Typical]	500 nA
Quiescent Current [Typical]	10 mA
Component Count + Extras	6 + 8
Internal Switch	Yes
Design Author	Linear Technology
Application / Target Market	Power: Auxiliary Power Supply
Standby Current [Maximum]	- Not Given
Quiescent Current [Maximum]	- Not Given
Main I.C. Base Part	LTM4661
Date Created By Author	2017-06
Date Added To Library	2018-04