DC-DC Controller. CN5136 Datasheet
500 mA PFM Step-Up DC-DC Controller
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
CN5136 can operate from the voltage of 2.7V to
6V, which is very suitable for lithium and three
nickel-metal hydride battery-powered
The device is available in 5 pin SOT23 package
and is fully specified over the -40°C to +85°C
extended temperature range.
PDA and other portable products
Computer peripheral products
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
Typical Application Circuit
Figure 1 Typical Application Circuit
Figure 2 Block Diagram
Operating Ambient Temperature
－40℃ to 85℃
Inductor Connection. This pin is connected to the drain of
N-channel MOS transistor in device.
Positive Terminal of Power Supply.
Test pin. This pin should be tied to ground.
Voltage Feedback Pin. The output voltage is sampled and
feedback to this pin.
ABSOLUTE MAXIMUM RATINGS
Terminal Voltage (With respect to GND)
VDD..............…...…......-0.3V to +6.5V
Other terminal voltage………....-0.3V to VDD
Maximum Junction Temperature.......... 150°C
Operating Temperature.…..……...-40 to +85°C
Storage Temperature.......…….......-65 to +150°C
Lead Temperature (soldering, 10s) .......+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the
device. These are stress ratings only, and functional operation of the device at these or any other
conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure
to absolute maximum rating conditions for extended periods may affect device reliability.