FAN5232 Fairchild Semiconductor, FAN5232 Datasheet
FAN5232
Manufacturer Part Number
FAN5232
Description
Adjustable PWM Buck Controller for LCD PCs
Manufacturer
Fairchild Semiconductor
Datasheet
1.FAN5232.pdf
(9 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
FAN5232MTC
Manufacturer:
FAIRCHILD/仙童
Quantity:
20 000
Part Number:
FAN5232MTCX
Manufacturer:
FAIRCHILD/仙童
Quantity:
20 000
Features
• Three outputs: Adjustable Buck, 3.3V-Always,
• Adjustable synchronous switcher, 5V – 80% Vin
• 1% internal reference precision
• Current mode with voltage feed-forward
• Precision current limit option
• Charge pump works at all loads
• No shoot-through current
• Independent shutdown pins for ACPI
• Power Good, input UVLO, output OV
• 5.6V to 24V input voltage range
Applications
• LCD PCs
• Notebook PCs and PDAs
• Hand-held portable instruments
Block Diagram
FAN5232
Adjustable PWM Buck Controller for LCD PCs
5V-Always
3.3V-Always
5V-Always
PWRGD
SDNADJ
SDWN
1
2
3
4
5
6
7
Vin = 16–22V
FAN5232
14
13
12
11
10
9
8
The FAN5232 is a high efficiency and high precision DC/DC
controller for PCs. It has a synchronous switcher whose
output can be adjusted from 5V up to 80% of Vin. It also has
two linear regulators for standby, 3.3V and 5V. The PWM
utilizes both input and output voltage feedback in a
current-mode control, allowing for fast and stable loop
response over a wide range of input and output variations.
Synchronous switching provides best efficiency over a wide
range of loads. Current sense based on MOSFET R
gives maximum efficiency, while also permitting use of an
optional sense resistor for high precision.
The FAN5232 is available in a 14 pin TSSOP package.
Description
www.fairchildsemi.com
REV. 1.1.1 10/7/02
+
12V @ 8A
DS,on
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