NCP1580 Datasheet (ON Semiconductor) - Low Voltage Synchronous Buck Controller

NCP1580, Low Voltage Synchronous Buck Controller

Pin No.

Symbol Description 1 BST Supply rail for the floating top gate driver.

To form a boost circuit, use an external diode to bring the desired input voltage to this pin (cathode connected to BST pin).

Connect a capacitor (CBST) between this pin and the PHASE pin.

Typical values for CBST r

NCP1580 Low Voltage Synchronous Buck Controller The NCP1580 is a voltage mode PWM controller designed to operate from a 5.0 V or 12 V supply and produce an output voltage as low as 0.8 V.

This 8 pin device provides an optimal level of integration to reduce size and cost of the power supply.

The NCP1580 has a fixed 350 kHz oscillator and soft start function.

The NCP1580 provides a 1.5 A floating gate driver design to drive N Channel MOSFETs in a synchronous configuration.

NCP1580 Features

* include thermal shutdown and undervoltage lockout (UVLO). The NCP1580 is available in an 8

* pin SOIC package. Features

* Input Voltage Range from 4.5 V to 13.2 V

* 350 kHz Internal Oscillator

* Boost Pin Operates to 26.5 V

* Voltage Mode PWM Control