NCP3012

NCP3012 Synchronous PWM Controller The NCP3012 is a PWM device designed to operate from a wide input range and is capable of producing an output voltage as low as 0.8 V. The NCP3012 provides integrated gate drivers and an internally set 75 kHz oscillator. The NCP3012 has an externally compensated transconductance error amplifier with an internally fixed soft−start. The NCP3012 incorporates output voltage monitoring with a Power Good pin to indicate that the system is in regulation. The dual function SYNC pin synchronizes the device to a higher frequency (Slave Mode) or outputs a 180° out−of−phase clock signal to drive another NCP3012 (Master Mode). Protection features include lossless current limit and short circuit protection, output overvoltage and undervoltage protection, and input undervoltage lockout. The NCP3012 is available in a 14−pin TSSOP package. Features Input Voltage Range from 4.7 V to 28 V 75 kHz Operation 0.8 V $1.0% Reference Voltage Buffered External +1.25 V Reference Current Limit and Short Circuit Protection Power Good Enable/Disable Pin Input Undervoltage Lockout External Synchronization Output Overvoltage and Undervoltage Protection This is a Pb−Free Device Typical Applications Set Top Box Power Modules ASIC / DSP Power Supply VIN CREF CIN EN PG VCC BST HSDR VSW CBST Q1 LO VOUT VREF SYNC LSDR R ISET GND Q2 RFB1 CO RFB2 RREF COMP FB RC CC2 C C1 Figure 1. Typical Application Circuit http://onsemi.com 14 1 TSSOP...