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dc2569af
DEMO MANUAL DC2569A
DESCRIPTION
LTM4661
1.8V-5.5V Input,
Synchronous Step-Up µModule Regulator
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 effi-
cient circuit. The converter operates with only one phase
in burst mode and achieves over 90% efficiency with
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PERFORMANCE SUMMARY
100mA load. The demonstration circuit can be easily
modified to generate different output voltages.
The DC2569 has small circuit footprint. It is a high perfor-
mance and cost effective solution for generating output
voltages up to 15V from inputs as low as 1.8V.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2569A
Specifications are at T
A
= 25°C
PARAMETER
CONDITIONS
VALUE
Minimum Input Voltage
I
OUT
= 0A to 0.3A
1.8V
Maximum Input Voltage
I
OUT
= 0A to 1A
5.5V
V
OUT
V
IN
= 1.8V to 5.5V, I
OUT
= 0A
12V ±3%
Output Voltage Ripple
V
IN
= 5V, I
OUT
= 1A
20mV
P-P
Nominal Switching Frequency
1MHz
BOARD PHOTO
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