FAN5069_08 Datasheet, PDF (1/22 Pages) Fairchild Semiconductor – PWM and LDO Controller Combo

FAN5069
PWM and LDO Controller Combo
September 2006
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
Applications
■ PC/Server Motherboard Peripherals
– V_{CC_MCH} (1.5V), V_DDQ (1.5V) and
V_{TT_GTL} (1.25V)
■ Power Supply for
– FPGA, DSP, Embedded Controllers, Graphic Card
Processor, and Communication Processors
■ Industrial Power Supplies
■ High-Power DC-to-DC Converters
Description
The FAN5069 combines a high-efficiency Pulse-Width-
Modulated (PWM) controller and an LDO (Low DropOut)
linear regulator controller. Synchronous rectification pro-
vides high efficiency over a wide range of load currents.
Efficiency is further enhanced by using the low-side
MOSFET’s R_DS(ON) to sense current.
Both the linear and PWM regulator soft-start are con-
trolled by a single external capacitor, to limit in-rush cur-
rent 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).
Ordering Information
Part Number Operating Temp. Range Pb-Free Package Packing Method
FAN5069MTCX
-10°C to +85°C
Yes 16-Lead TSSOP Tape and Reel
FAN5069EMTCX
-40°C to +85°C
Yes 16-Lead TSSOP Tape and Reel
Qty./Reel
2500
2500
Note: Contact Fairchild sales for availability of other package options.
© 2005 Fairchild Semiconductor Corporation
FAN5069 Rev. 1.1.5
www.fairchildsemi.com