AQ105
Secondary V/I amplifier
SOT23-5 and SC70-5 Package
Product Specification
Revision 1.3
July 17, 2006
General Description
The AQ105 is a low cost secondary
control circuit for low power applications
needing constant voltage and constant
current control. It implements a simple
single-loop control by modifying the
internal reference level as a function of
current above the current limit threshold.
The current loop reduces the reference
by 40 mV per mV change at the current
sense input. The error amp provides
high gain and bandwidth under low
voltage operation.
Applications
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Offline Battery Chargers
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Constant V/ Constant I supplies
Features
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1.25V reference
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200mV current limit threshold
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Error amp output swings near ground for
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low voltage operation
High PSRR and line regulation
Low current consumption
Offered in ultra small SC70-5 package
Open collector output
Low voltage operation 2.2V
10mA current sink
50 ppm/ºC typical temperature deviation
RoHS compliant
available
Block Diagram
Pin Configuration
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AQ105
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