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- Voltage detector IC  
- Reset IC  
 
- Li+ Battery Charger IC
- Coin Battery Charger IC
- LA Battery Charger IC
- LiFePO4 Battery Charger IC
- Solar Panel-Powered Charger IC
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- WLED Driver
 
- DC-DC Converter
 
- LDO
 
- Amplifiers
 
CN5136
500 mA PFM Step-Up DC-DC Controller
Product Profile
    Application Note
 
General Description:
CN5136 is a high-efficiency pulse frequency modulation (PFM) DC-DC converter, and the maximum output current
capability is up to 500mA. CN5136 has an on-chip power transistor,thus greatly reduces the external component
count. Other features include the maximum inductor current limit, soft-start circuit. CN5136 output voltage can be
set by external resistors. High accuracy on-chip voltage reference ensures the accuracy of the output voltage and
low temperature drift. CN5136 can operate from the voltage of 2.7V to 6V, which is very suitable for lithium and three
nickel-metal hydride battery-powered applications.
The device is available in 5 pin SOT23 package and is fully specified over the -40°C to +85°C extended temperature
range.
 
Applications:
mobiles power PDA and other portable products
Electric toys Computer peripheral products
 
Features:
Operating voltage range:2.7V to 6V
Integrated power transistor
Maximum inductor current limit function
Output voltage can be set by external resistor
Output voltage accuracy:±2%
High efficiency: 90%
On-chip soft-start circuit
Operating Temperature Range -40°C to +85°C
Available in SOT23-5
Pb-free
 
 
 
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