APW7060

Features:

• Provides Two Regulated Voltages- One Synchronous DC/DC Buck Controller- One Linear Controller
• 0.8V Internal Reference Voltage- Both Controllers: 0.8V ± 2% Line, Load and Temp.
• Output Voltage Range- PWM Controller : 0.8V to V_IN- Linear Controller : 0.8V to (12VCC-V_GSpass)
• Full Duty Cycle Range for PWM Controller- 0% to 100%
• Internal Loop Compensation for PWM Controller
• Internal 2ms Soft Start and Short Circuit Protec tion for both Controllers
• Both Controllers Drive N-Channel MOSFETs
• Small Converter Size- 600kHz Constant Switching Frequency- Simple SO-14 Package
• Shutdown Control


Application

• Motherboard
• Graphics Cards
• 12V, 5V and 3.3V Inputs DC-DC Converter
• DSP Supplies
• Embedded processor and I/O supplies


Pinout




Specifications

Symbol	Parameter	Rating	Unit
5VCC	5VCC Supply Voltage (5VCC to GND)	-0.3 ~ 7	V
12VCC	12VCC Supply Voltage (12VCC to GND)	-0.3 ~ 15	V
	UAGTE, DRIVE2 to GND	-0.3 ~ 12VCC	V
	LGATE, FB, FB2 to GND	-0.3 ~ 5VCC	V
	Maximum Junction Temperature	150
TSTG	Storage Temperature	-65 ~ 150
TSDR	Maximum Soldering Temperature, 10 Seconds	300
VESD	Minimum ESD Rating (Human body model)	±2	KV

Description

The APW7060 integrates a synchronous buck PWM controller and a linear controller to provide two regulated voltages in a single package. The PWM controller drives external N-channel MOSFETs and operates at a fixed 600kHz frequency. When the input supply drops close to the output, the upper MOSFET remains on, achieving 100% duty cycle. Internal loop   compensation is optimized for fast transient response, eliminating external compensation network. The linear controller drives an external N-channel MOSFET to form a linear regulator. The internal 0.8V reference makes this part suitable for a wide variety of low voltage applications.
The APW7060 has an undervoltage lockout circuitry to ensures that both the 5VCC and 12VCC must be present before its internal circuitry is power up. Soft start is internally set to 2ms and will bring both outputs into regulation in a controlled manner. When either output goes into short, soft start will be initiated. If the short condition still remains after three cycles, both regulators will be shut down. To restart both regulators, recycle the voltage at 5VCC or 12VCC pin or momentarily pull the FB2 pin above 1.28V. The APW7060 can be shutdown by pulling the FB2 pin above 1.28V. In shutdown, all gate drive signals will be low. This dual controller is available in SO-14 package.