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PDF FAN1537 Data sheet ( Hoja de datos )
| Número de pieza | FAN1537 | |
| Descripción | Dual 1A Adjustable/Fixed Low Dropout Linear Regulators | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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FAN1537
Dual 1A Adjustable/Fixed Low Dropout
Linear Regulators
Features
• Low dropout voltage
• Load regulation: 0.05% typical
• On-chip thermal limiting
• SO-8 and 5-lead SPAK and TO-252 DPAK packages
• Fixed 3.3V, and adjustable or 2.5V or 1.8V fixed
• Stable with low ESR output capacitors
Applications
• Hard Disk Drives, CD-ROMs, DVDs
• High efficiency linear regulators
• Post regulators for switching supplies
• ADSL and Cable Modems
• 5V to 3.3V and 2.5V linear regulators
• Motherboard with multiple supplies
Description
The FAN1537 provides 2 output voltages: 3.3V, and either
adjustable or 2.5V or 1.8V fixed with 1.0A each output
current capability. These devices have been optimized for
low voltage where transient response and minimum input
voltage are critical.
Current limit features protect the outputs against short circuit
currents. On-chip thermal limiting provides protection
against any combination of overload and ambient tempera-
ture that would create excessive junction temperatures.
The FAN1537 series regulators are available in SO-8 and
5-lead SPAK and TO-252 DPAK power packages.
Typical Applications
VIN = 5V
22µF
+
FAN1537A
V1
VIN
V2
NC GND
3.3V at 1.0A
+
22µF
2.5V at 1.0A
+
22µF
VIN = 5V
22µF
+
FAN1537B
V1
VIN V2
GND FB
R1
54.9Ω
+
22µF
R2
124Ω
3.3V at 1.0A
1.8V at 1.0A
+
22µF
V2 = VREF (1 + R1/R2)
REV. 1.1.1 3/20/02
1 page  
PRODUCT SPECIFICATION
Mechanical Dimensions
8-Lead SOIC Package
Symbol
A
A1
B
C
D
E
e
H
h
L
N
α
ccc
Inches
Min. Max.
.053 .069
.004 .010
.013 .020
.0075 .010
.189 .197
.150 .158
.050 BSC
.228 .244
.010 .020
.016 .050
8
0° 8°
— .004
Millimeters
Min. Max.
1.35 1.75
0.10 0.25
0.33 0.51
0.20 0.25
4.80 5.00
3.81 4.01
1.27 BSC
5.79 6.20
0.25 0.50
0.40 1.27
8
0° 8°
— 0.10
Notes
5
2
2
3
6
FAN1537
Notes:
1. Dimensioning and tolerancing per ANSI Y14.5M-1982.
2. "D" and "E" do not include mold flash. Mold flash or
protrusions shall not exceed .010 inch (0.25mm).
3. "L" is the length of terminal for soldering to a substrate.
4. Terminal numbers are shown for reference only.
5. "C" dimension does not include solder finish thickness.
6. Symbol "N" is the maximum number of terminals.
85
EH
14
D
A1
A
SEATING – C –
e PLANE LEAD COPLANARITY
B ccc C
α
h x 45°
C
L
REV. 1.1.1 3/20/02
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet FAN1537.PDF ] | |
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