FAN5069: PWM and ULDO Controller Combo

The FAN5069 combines a high efficiency Pulse-Width-Modulated PWM controller and a 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 system 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).

Features

• General Purpose PWM Regulator and LDO Controller
• Input Voltage Range: 3V to 24V
• Output Voltage Range: 0.8V to 15V- V_CC- 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)
• R_DS(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

Application Notes