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FAN1538PBX датащи(PDF) 1 Page - Fairchild Semiconductor

номер детали FAN1538PBX
подробное описание детали  Dual Channel 1A Low Dropout Linear Regulator with UVLO and Soft-start
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производитель  FAIRCHILD [Fairchild Semiconductor]
домашняя страница  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN1538PBX датащи(HTML) 1 Page - Fairchild Semiconductor

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www.fairchildsemi.com
REV. 1.0.2 12/17/03
Features
• Two independent outputs
• Load regulation: 0.05% typical
• Under-voltage lockout and softstart
• Over Temperature protection
• T0-252 DPAK, 5-lead SPAK packages
• Fixed 3.3V and adjustable or fixed 2.5V output
Applications
• Hard Disk Drives, CD-Roms
• Set-top Boxes
• ADSL line cards
• Motherboards with multiple supplies
General Description
The FAN1538 provides two output voltages: a fixed 3.3V
ouput and either a fixed 2.5V or adjustable output with 1A
output current capability. Refer to Ordering Information for
details.
Current limit protects against short circuit currents and on
chip over temperature circuitry limits the maximum die tem-
perature.
Under voltage lockout and softstart circuitry protects against
unregulated output voltages when the input voltage is below
specification.
Block Diagram
FAN1538B
V1
V2
FB
3.3V
V2 = VREF (1 + R1/R2)
at 1.0A
22
µF
1.5V at 1.0A
R2
1250
R1
250
22
µF
22
µF
22
µF
2.5V at 1.0A
3.3V at 1.0A
22
µF
VIN = 5V
VIN = 5V
+
+
VIN
V1
NC GND
V2
FAN1538A
22
µF
+
22
µF
2.5V at 1.0A
3.3V at 1.0A
GND
+
22
µF
+
FAN1538
Dual Channel 1A Low Dropout
Linear Regulator with UVLO and Soft-start


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