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CN5309
PFM Step-Up DC-DC Controller IC
Product Profile
    Application Note
 
General Description:
The CN5309 is a simple, compact PFM boost controller designed for applications where extremely low cost and small size are top priorities. The output voltage is fixed at 9V with 1% accuracy from an input voltage range of +2.7V to +6.5V.
Low current consumption of 32uA typical makes CN5309 ideal for battery-powered applications.
The CN5309 is designed specifically to provide a simple application circuit and minimize the size and number of external components, making them ideal for consumer electronics applications.
The CN5309 adopts PFM operating mode, which provides excellent efficiency over a wide-range of input voltage and load currents. The on-time and off-time are tuned to permit optimization of external component size.
Chip enable input can make CN5309 into ultra-low-current shutdown mode.
The CN5309 is available in a space-saving 6-pin SOT23 package.
 
Applications:
Hand-held Devices LCD Bias
Electric toys Charger
 
Features:
Operating voltage range:2.7V to 6V
Low Operating Current: 32uA@5V
Fixed Output Voltage of 9V
High Output voltage accuracy:±1%
No Feedback Resistor needed
Output Voltage can be adjusted upwards with External Resistor
Output Power: up to 40W
High efficiency: 94%
Chip Enable Input
Operating Temperature Range -40°C to +85°C
Available in SOT23-6
Pb-free
 
 
 
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