FAN1117AD5X FAIRCHILD [Fairchild Semiconductor], FAN1117AD5X Datasheet

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FAN1117AD5X

Manufacturer Part Number
FAN1117AD5X
Description
1A Adjustable/Fixed Low Dropout Linear Regulator
Manufacturer
FAIRCHILD [Fairchild Semiconductor]
Datasheet
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,
Applications
• Active SCSI terminators
• High efficiency linear regulators
• Post regulators for switching supplies
• Battery chargers
• 12V to 5V linear regulators
• Motherboard clock supplies
Typical Applications
FAN1117A
1A Adjustable/Fixed Low Dropout Linear Regulator
3.3V, 5V
V
V
IN
V
OUT
IN
= 12V
= 12V
= V
REF
10 F
(1 + R2/R1) + I
10 F
+
+
ADJ
V
• R2
IN
V
IN
FAN1117A
FAN1117A-5
ADJ
GND
V
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.
OUT
V
OUT
R1
124
R2
768
+
22 F
+
5V at 1A
22 F
www.fairchildsemi.com
9V at 1A
REV. 1.1.0 11/7/03

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FAN1117AD5X Summary of contents

Page 1

FAN1117A 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, ...

Page 2

PRODUCT SPECIFICATION Pin Assignments Front View 3 IN Tab is 2 OUT V OUT 1 ADJ/GND 4-Lead Plastic SOT-223 = 15 C/W* JC *With package soldered to 0.5 square inch copper area over backside ground plane or internal power plane, ...

Page 3

FAN1117A Electrical Characteristics Operating Conditions 25°C unless otherwise specified The denotes specifications which apply over the specified operating temperature range. Parameter 3 Reference Voltage 1.5V 10mA 4 Output Voltage 10mA FAN1117A-1.8, 3.3V FAN1117A-2.5, 4V ...

Page 4

PRODUCT SPECIFICATION Typical Performance Characteristics 1.5 1.4 1.3 1.2 1 1 0.8 T 0.7 0.6 0 0.2 0.4 0.6 OUTPUT CURRENT (A) Figure 2. Dropout Voltage vs. ...

Page 5

FAN1117A Typical Performance Characteristics 2.0 1.75 1.5 1.25 1.0 -75 -50 - 100 125 150 175 JUNCTION TEMPERATURE ( C) Figure 8. Short-Circuit Current vs. Temperature 10 7.5 TO-252, TO-220 5 SOT-223 2 ...

Page 6

PRODUCT SPECIFICATION Mechanical Dimensions 4-Lead SOT-223 Package Inches Millimeters Symbol Min. Max. Min. A — .071 — A1 — .181 — B .025 .033 .640 c — .090 — D .248 .264 6.30 E .130 .148 3.30 e .115 .124 ...

Page 7

FAN1117A Mechanical Dimensions 3-Lead TO-220 Package Inches Millimeters Symbol Min. Max. Min. A .140 .190 3.56 b .015 .040 .38 b1 .045 .070 1.14 c1 .014 .022 .36 øP .139 .161 3.53 D .560 .650 14.22 E .380 .420 9.65 ...

Page 8

PRODUCT SPECIFICATION Mechanical Dimensions 3-Lead TO-252 Package 6.73 6.35 5.46 5. (0.59) 0.89 0. SEE NOTE GAGE PLANE 0.61 0. 1.78 1.40 2.90 DETAIL A ...

Page 9

... TO-220 FAN1117AT18 TO-220 FAN1117AT25 TO-220 FAN1117AT33 TO-220 FAN1117AD5X TO-252 in tape and reel FAN1117AS5X SOT-223 in tape and reel DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; ...

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