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 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