W83320G

Series: -
PWM Type: Voltage Mode
Buck: Yes
Inverting: No
Doubler: No
Divider: No
Cuk: No
Isolated: No
Operating Temperature: 0°C ~ 70°C
Number of Outputs: 1
Package / Case: 14-SOIC (0.154", 3.90mm Width)
Packaging: Tube
Boost: No
Flyback: No
Frequency - Max: 240kHz
Manufacturer: Nuvoton Technology Corporation of America
Duty Cycle: 94.3%
Voltage - Supply: 1.8 V ~ 5 V


Features:

·1.8V to 5V power stage input voltage
·Providing +/-1.5% reference voltage
·Power Good flag
·Current limit without sense resistor
·Soft start
·Switching frequency from 100 kHz to 400 kHz
·Tiny plastic SOP-14 package


Application

· DDR SDRAM and AGP core power for Desktop PC
· Set-Top Boxes/ Home Gateways
· Core Logic Regulators
· High-Efficiency Buck Regulation


Description

The W83320S is a high-speed, N-Channel synchronous buck regulator controller optimized for wide reference input range. The W83320S employs adjustable frequency ranging from 100 KHz to 400 KHz voltage-mode PWM control architecture. The regulator is biased from a 5V rail and the power for the high-side MOSFET can be supplied by a separate 12V rail or supplied from the internal charge pump.

A Current limit protection is implemented by monitoring the voltage drop across the switch ON resistance of the low-side MOSFET. This method can eliminate the requirement of extra current sensing resistor and avoids false trigger of OC protection when VIN varies efficiently. The adaptive non-overlapping MOSFET gate drivers help avoid potential shoot-through problems while maintaining high efficiency. All these together with Power-good flag, enable and soft start features make power sequencing easy.

Parameters:

Technical/Catalog Information	W83320G
Vendor	Nuvoton Technology Corporation of America
Category	Integrated Circuits (ICs)
Type	Step-Down (Buck)
Number of Outputs	1
Voltage - Input	1.8 ~ 5 V
Voltage - Output	-
Current - Output	-
Power - Output	-
Package / Case	14-SOIC (3.9mm Width), 14-SOL
Packaging	Tube
Internal Switch(s)	No
Synchronous	Yes
Rds (On)	-
Operating Temperature	0°C ~ 70°C
Frequency - Switching	100kHz ~ 400kHz
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	W83320G W83320G