NCP1587 Datasheet (ON Semiconductor) - Low Voltage Synchronous Buck Controller

NCP1587, 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 range

NCP1587, NCP1587A Low Voltage Synchronous Buck Controller The NCP1587 and NCP1587A are low cost PWM controllers designed to operate from a 5 V or 12 V supply.

These devices are capable of producing an output voltage as low as 0.8 V.

These 8 pin devices provide an optimal level of integration to reduce size and cost of the power supply.

The NCP1587/A provide a 1 A gate driver design and an internally set 275 kHz (NCP1587) and 200 kHz (NCP1587A) oscillator.

In addition to the 1 A gate dri

NCP1587 Features

* of the gate driver include adaptive non

* overlap circuitry. The devices also incorporate an externally compensated error amplifier and a capacitor programmable soft

* start function. Protection features include programmable short circuit protection and under voltage lockout (UVLO). The