1117AT33 FAN1117AT33 Datasheet

1117AT33 Datasheet, PDF, Equivalent


Part Number

1117AT33

Description

FAN1117AT33

Manufacture

Fairchild Semiconductor

Total Page 9 Pages
Datasheet
Download 1117AT33 Datasheet


1117AT33
www.fairchildsemi.com
FAN1117Awww.DataSheet4U.com
1A Adjustable/Fixed Low Dropout Linear Regulator
Features
• Low dropout voltage
• Load regulation: 0.05% typical
• Trimmed current limit
• On-chip thermal limiting
• Standard SOT-223, TO-220, and TO-252 packages
• Three-terminal adjustable or fixed 1.8V, 2.5V, 2.85V,
3.3V, 5V
Applications
• Active SCSI terminators
• High efficiency linear regulators
• Post regulators for switching supplies
• Battery chargers
• 12V to 5V linear regulators
• Motherboard clock supplies
Description
The FAN1117A and FAN1117A-1.8, -2.5, -2.85, -3.3 and -5
are low dropout three-terminal regulators with 1A output
current capability. These devices have been optimized for low
voltage where transient response and minimum input voltage
are critical. The 2.85V version is designed specifically to be
used in Active Terminators for SCSI bus.
Current limit is trimmed to ensure specified output current
and controlled short-circuit current. On-chip thermal limiting
provides protection against any combination of overload and
ambient temperatures that would create excessive junction
temperatures.
Unlike PNP type regulators where up to 10% of the output
current is wasted as quiescent current, the quiescent current
of the FAN1117A flows into the load, increasing efficiency.
The FAN1117A series regulators are available in the
industry-standard SOT-223, TO-220, and TO-252 (DPAK)
power packages.
Typical Applications
VIN = 12V
10µF
+
FAN1117A
VIN VOUT
ADJ
VOUT = VREF(1 + R2/R1) + IADJ • R2
R1
124
+ 9V at 1A
22µF
R2
768
VIN = 12V
10µF
+
FAN1117A-5
VIN VOUT
GND
+ 5V at 1A
22µF
REV. 1.1.0 11/7/03

1117AT33
PRODUCT SPECIFICATION
Pin Assignments
www.DataSheet4U.com
FAN1117A
Front View
Tab is VOUT
Tab is
VOUT
Front View
3
2
1
IN
OUT
ADJ/GND
4-Lead Plastic SOT-223
ΘJC = 15°C/W*
Front View
Tab is VOUT
123
ADJ/ OUT IN
GND
3-Lead Plastic TO-252
ΘJC = 3°C/W*
12 3
ADJ/ OUT IN
GND
3-Lead Plastic TO-220
ΘJC = 3°C/W*
*With package soldered to 0.5 square inch copper area over backside ground plane or internal power plane, ΘJA can vary from
30°C/W to more than 50°C/W. Other mounting techniques may provide better thermal resistance than 30°C/W.
Absolute Maximum Ratings
Parameter
VIN
(VIN – VOUT) * IOUT
Operating Junction Temperature Range
Storage Temperature Range
Lead Temperature (Soldering, 10 sec.)
Min.
0
-65
Max.
18
See Figure 1
125
150
300
Unit
V
°C
°C
°C
1.2
1.0
0.8
0.6
0.4
0.2
0
0
24
6 8 10 12 14 16
VIN VOUT (V)
Figure 1. Absolute Maximum Safe Operating Area
18 20
2 REV. 1.1.0 11/7/03


Features www.fairchildsemi.com www.DataSheet4U.co m FAN1117A 1A Adjustable/Fixed Low Dr opout Linear Regulator Features • • • • • Low dropout voltage L oad regulation: 0.05% typical Trimmed c urrent limit On-chip thermal limiting S tandard SOT-223, TO-220, and TO-252 pac kages Three-terminal adjustable or fix ed 1.8V, 2.5V, 2.85V, 3.3V, 5V Descrip tion The FAN1117A and FAN1117A-1.8, -2. 5, -2.85, -3.3 and -5 are low dropout t hree-terminal regulators with 1A output current capability. These devices have been optimized for low voltage where t ransient response and minimum input vol tage are critical. The 2.85V version is designed specifically to be used in A ctive Terminators for SCSI bus. Current limit is trimmed to ensure specified output current and controlled short-cir cuit current. On-chip thermal limiting provides protection against any combina tion of overload and ambient temperatur es that would create excessive junction temperatures. Unlike PNP type regulators where up to 10% of the output current i.
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