FAN1538 Fairchild Semiconductor, FAN1538 Datasheet
![no-image](/images/manufacturer_photos/0/2/252/fairchild_semiconductor_sml.jpg)
FAN1538
Manufacturer Part Number
FAN1538
Description
Dual Channel 1A Low Dropout Linear Regulator with UVLO and Soft-start
Manufacturer
Fairchild Semiconductor
Datasheet
1.FAN1538.pdf
(6 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
FAN1538PA
Manufacturer:
INF
Quantity:
20 000
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
Block Diagram
FAN1538
Dual Channel 1A Low Dropout
Linear Regulator with UVLO and Soft-start
VIN
VIN
= 5V
= 5V
22 F
22 F
+
NC GND
V
GND
IN
FAN1538B
FAN1538A
FB
V2 = VREF (1 + R1/R2)
V1
V2
V1
V2
1250
R2
R1
250
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.
+
+
22 F
22 F
22 F
+
+
22 F
22 F
3.3V at 1.0A
3.3V at 1.0A
2.5V at 1.0A
2.5V at 1.0A
22 F
1.5V at 1.0A
3.3V
at 1.0A
www.fairchildsemi.com
REV. 1.0.2 12/17/03