NCP1547 Datasheet (ON Semiconductor)

NCP1547, Buck Regulator

SO *8 DFN *18 PIN SYMBOL FUNCTION 1 1 BOOST The BOOST pin provides additional drive voltage to the on *chip NPN power transistor.

The resulting decrease in switch on voltage increases efficiency.

2 2 *4 VIN This pin is the main power input to the IC.

3 5 *7

NCP1547 1.5 A, 340 kHz, Buck Regulator with Synchronization Capability The NCP1547 is a 1.5 A buck regulator IC operating at a fixed frequency of 340 kHz.

The device uses the V2™ control architecture to provide unmatched transient response, the best overall regulation and the simplest loop compensation for today’s high speed logic.

The NCP1547 accommodates input voltages from 4.0 V to 40 V and contains synchronization circuitry.

The on chip NPN transistor is capable of p

NCP1547 Features

* V2 Architecture Provides Ultra

* Fast Transient Response, Improved Regulation and Simplified Design

* Wide Operating Range: 4 V to 40 V

* 2.0% Error Amp Reference Voltage Tolerance

* Switch Frequency Decrease of 4:1 in Short Circuit Conditions Reduces Short Ci