The SD6251 is a high efficiency, fixed frequency 550KHz, current mode PWM boost DC/DC converter
which could operate battery such as input voltage down to
2.5V. The converter output voltage can be
adjusted to a maximum of 5.25V by an external resistor divider. Besides the converter includes a
0.08Ω N-channel MOSFET switch and 0.12Ω P-channel synchronous rectifier. So
no external
Schottky diode is required and could get better efficiency near 93% .
Features
High Efficiency up to 93%
Low RDS(ON) Integrated Power MOSFET
NMOS 80mΩ / PMOS120mΩ
Wide Input Voltage Range: 2.5V to 5.5V
Fixed 550KHz Switching Frequency
Low-Power Mode for Light Load Conditions
±2.0% Voltage Reference Accuracy
PMOS Current Limit for Short Circuit Protection
Low Quiescent Current
Output Ripple under 200mV. (Scope Full Bandwidth)
Fast Transient Response
Built-In Soft Start Function
Over-Temperature Protection with Auto Recovery
Output Overvoltage Protection
Space-Saving SOT-23-6 Package