FAN5069

FAN5069 PWM and LDO Controller Combo September 2006 FAN5069 PWM and LDO Controller Combo Features ■ ■ ■ Description The FAN5069 combines a high-efficiency Pulse-WidthModulated (PWM) controller and an LDO (Low DropOut) linear regulator controller. Synchronous rectification provides high efficiency over a wide range of load currents. Efficiency is further enhanced by using the low-side MOSFET’s RDS(ON) to sense current. Both the linear and PWM regulator soft-start are controlled by a single external capacitor, to limit in-rush current from the supply when the regulators are first enabled. Current limit for PWM is also programmable. The PWM regulator employs a summing-current-mode control with external compensation to achieve fast load transient response and provide design optimization. FAN5069 is offered in both industrial temperature grade (-40°C to +85°C) as well as commercial temperature grade (-10°C to +85°C). ■ ■ ■ ■ ■ ■ ■ ■ ■ General Purpose PWM Regulator and LDO Controller Input Voltage Range: 3V to 24V Output Voltage Range: 0.8V to 15V – VCC – 5V Shunt Regulator for 12V Operation Support for Ceramic Cap on PWM Output Programmable Current Limit for PWM Output Programmable Switching Frequency (200KHz to 600KHz) RDS(ON) Current Sensing Internal Synchronous Boot Diode Soft-Start for both PWM and LDO Multi-Fault Protection with Optional Auto-restart 16-pin TSSOP Package Applications www.DataSheet4U.com ■ ■ ■ ■ PC/Server Motherboard Peripherals – VCC_MCH (1.5V), VDD...