APW7058 Datasheet | Anpec Electronics Coropration

Features - Provides Two Regulated Voltages - One Synchronous-Rectified Buck PWM Controller - One Linear Controller .. General Description The APW7058 integrates one synchronous-rectified Buck PWM controller and one linear controller to provide two regulated voltages for graphics cards and other embedded processor applications. The PWM controller which drives dual N-channel MOSFETs uses fixed 600k Hz frequency, voltage-mode PWM control and integrates power-on-reset(POR), built-in soft-start, output under-voltage monitoring and shutdown functions into a single chip. The linear controller which drives a N-channel MOSFET bypass transistor allows users to optimize the transient response by external ponents. The POR circuit with hysteresis monitors both 5VCC and 12VCC supply voltages to start up/shutdown the IC at power-on/off. An internal 0.8V temperature-pensated reference is designed to meet the low output voltage requirement for further applications. The built-in soft-start function sets the soft-start interval to prevent the output voltages from overshoot as well as limiting the input currents. The under-voltage protections monitor the voltages at FB and FB2 for short-circuit protection. The under-voltage protections cycle the soft-start function until 3 times of UVP events are happened. Pulling and holding the FB2 pin above 1.28V to disable the both controllers. - Low Reference Voltage for Further Applications - Both Controllers : 0.8V ± 2% Over Temperature - Both Controllers Drive N-Channel MOSFETs - PWM Controller Drives Dual N-Channel MOSFETs - Linear Controller Drives N-Channel MOSFET - Built-in PWM Feedback pensation - No Steady-State Error - Voltage-Mode PWM Control - Full 0~100% Duty Ratio - Fast Transient Response - Adjustable Outputs by External Resistor Dividers - Under-Voltage Monitoring on Both Controllers - Small Converter Size - 600k Hz Constant Switching Frequency - Built-In Soft-Start - Simple SO-8 Package - - Shutdown Control Lead Free...