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FAN5069 PWM and LDO Controller Combo
September 2006
FAN5069
PWM and LDO Controller Combo
Features
■
■
■
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).
■
■
■
■
■
■
■
■
■
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
Ordering Information
Part Number
FAN5069MTCX
FAN5069EMTCX
Operating Temp. Range Pb-Free
-10°C to +85°C
-40°C to +85°C
Yes
Yes
Package
16-Lead TSSOP
16-Lead TSSOP
Packing Method
Tape and Reel
Tape and Reel
Qty./Reel
2500
2500
Note:
Contact Fairchild sales for availability of other package options.
1 Introduction
In the mid-1960s, American scientist Maas conducted extensive experimental research on the charging process of open-cell batteries and proposed an acceptable charging curve for ...[详细]
嵌入式系统
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