APW7068
Synchronous Buck PWM and Linear Controller with 0.8V Reference Out Voltage
Features
General Description
• Tw...
APW7068
Synchronous Buck PWM and Linear Controller with 0.8V Reference Out Voltage
Features
General Description
Two Regulated Voltages and REF_OUT - Synchronous Buck Converter - Linear
Regulator - REF_OUT = 0.8V±1% with 3mA Source Current
Single 12V Power Supply Required Excellent Both Output Voltage Regulation
- 0.8V Internal Reference - ±1% Over Line Voltage and Temperature Integrated Soft-Start for PWM and Linear Outputs 300KHz Fixed Switching Frequency Voltage Mode PWM Control Design and Up to 89% (Typ.) Duty Cycle Under-Voltage Protection Monitoring Linear Output Over-Voltage Protection Monitoring PWM Output Over-Current Protection for PWM Output - Sense Low-side MOSFET’s RDS(ON) SOP-14, SSOP-16 and Compact QFN4x4-16 packages Lead Free and Green Devices Available (RoHS Compliant)
Applications
Graphic Cards
Simplified Application Circuit
12V VIN2
Q3 VOUT2
Linear PWM Controller Controller
VIN1 Q1
L VOUT1 Q2
The APW7068 integrates synchronous buck PWM, linear
controller, and 0.8V Reference Out Voltage, as well as
the monitoring and protection functions into a single
package. The fixed 300kHz switching frequency synchro-
nous PWM controller drives dual N-channel MOSFETs,
which provides one controlled power output with over-
voltage and over-current protections. Linear controller
drives an external N-channel MOSFET with under-volt-
age protection.
The APW7068 provides excellent regulation for output load
variation. An internal 0.8V ...