APW7066
APW7066 is Dual Synchronous Buck PWM Controllers and One Linear Controller manufactured by Anpec Electronics Coropration.
Features
- Two Synchronous Buck Converters and A
Linear Regulator
- VIN Range up to 12V
- Input Power Supplies Require 12V and 5V or
Use 12V to Generate a Shunt Regulator 5.8V
- 0.6V Reference for VOUT1 and VOUT3 with 0.8% Accurate
- 3.3V Reference for VOUT2 with 0.8% Accurate
- Buffered VTT Reference Output
- Three Outputs have Independent Soft-Start and Enable
- Internal 300k Hz Oscillator and Programmable
Frequency Range from 70 k Hz to 800k Hz
- Synchronous Switching Frequency
- DDR Mode or Independent Mode Selection
- Phase Shift Selection
- Power Good Function
- Short-Circuit Protection for VOUT1 and VOUT2
- Thermally Enhanced TSSOP-24P and
QFN5x5-32 Packages
- Lead Free and Green Devices Available
(Ro HS pliant)
Applications
- Graphic Cards
- DDR memory Power Supplies
- Low-Voltage Distributed Power Supplies
General Description
The APW7066 has two synchronous buck PWM controllers and one linear controller with high precision internal references voltage to offer accurate outputs. The PWM controllers are designed to drive two N-channel MOSFETs in synchronous buck topology, and the linear controller drives an external N-channel MOSFET. The device requires 12V and 5V power supplies, if the 5V supply is not available, VCC12 can offer an optional shunt regulator 5.8V for 5V supply. All outputs have independent soft-start and enable functions by SS/EN pins to control. Connect a capacitor from each SS/EN pin to the ground for setting the soft-start time, and pulling the SS/EN pin below 1V to disable regulator. Pull the SS2/EN2 to VCC, enter the DDR mode, the SS1/EN1 controls both VOUT1 and VOUT2, and allows VOUT2 to track VOUT1. It also offers the phase shift function by REFOUT pin to select the phase shift between VOUT1 and VOUT2 in DDR mode or Independent mode. When all SS/EN pins exceed 3.3V and no faults are detected, the PGOOD pin goes high to indicate the regulators are ready. If any of the SS/EN pins goes below 3.2V or any of the outputs has a fault condition,...
