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AP1117

1A LOW DROPOUT POSITIVE ADJUSTABLE OR FIXED-MODE REGULATOR


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AP1117 pdf
AP1117/AP1117I
1A DROPOUT POSITIVE ADJUSTABLE OR FIXED-MODE REGULATOR
Description
AP1117 is a low dropout positive adjus table or fixed-mode re gulator
with 1A output c urrent capabilit y. The product is voltage specifi cally
designed to provide well-regulated supply for low IC applications such
as high-speed b us termination a nd low cur rent 3.3V logic supply.
AP1117 is also well suited for ot her applications such as VGA ca rds.
AP1117 is guar anteed to h ave lower tha n 1.4V dropout at full load
current making it ideal to provide well-regulated outputs of 1.25 to 5.0
with 6.4V to 18V input supply. AP1117 is available both in commercial
temperature gra de (AP1117) a nd in industrial temperature r ange
(AP1117I) (TO252 and SOT223).
Features
1.4V Maximum Dropout at Full Load Current
Fast Transient Response
Output Current Limiting
Built-in Thermal Shutdown
Good Noise Rejection
3-Terminal Adjustable or Fixed 1.5V, 1.8V,2.5V, 3.3V, 5.0V
Operating Junction Temperature range
0°C TJ +125°C (All packages)
-20°C TJ +125°C (see ordering information)
-40°C TJ +125°C (see ordering information)
Lead-Free Packages: SOT223, TO252, SOT89-3, TO263 and
TO220-3
Totally Lead-Free; RoHS Compliant (Notes 1 & 2)
SOT223, TO252, SOT89-3, TO263 and TO220-3: Available in
“Green” Molding Compound (No Br, Sb)
Halogen and Antimony Free. “Green” Device (Note 3)
Pin Assignments
SOT89-3
( Top View )
3 VIN
2 VOUT
1 Adj (GND)
Tab is VOUT
SOT223
( Top View )
3 VIN
2 VOUT
1 Adj (GND)
Tab is VOUT
TO220-3
( Front View )
3
2
1
VIN
VOUT
Adj (GND)
Tab is VOUT
TO252 and TO263
( Top View )
3
VIN
Applications
PC Peripheral
Communication
Consumer Equipment
2 VOUT
1
Tab is VOUT
Adj (GND)
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen and Antimony free, "Green"
and Lead-Free.
3. Halogen and Antimony free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
AP1117/AP1117I
Document number: DS31009 Rev. 23 - 2
1 of 13
www.diodes.com
June 2013http://www.Datasheet4U.com
© Diodes Incorporated



No Preview Available !

AP1117 pdf
Typical Applications Circuit
AP1117/AP1117I
( 5V/3.3V fixed output )
( 5V/2.5V ADJ output )
Vo
VREF
(1
R2 )
R1
Pin Descriptions
Pin Number
1
I/O
I
2O
3I
Pin Name
Adj (GND)
VOUT
VIN
Function
A resistor divider from this pin to the VOUT pin and ground sets the output voltage (Ground only for
Fixed-Mode).
The output of the regulator. A minimum of 4.7µF capacitor (0.15Ω ≤ ESR 0.5) must be connected
from this pin to ground to insure stability.
The input pin of r egulator. Typically a large storage capacitor is connected from this pin to ground to
insure that the i nput voltage do es not sag below t he minimum dropout voltage during the load
transient response. This pin must always be 1.3V higher than VOUT in order for the device to regulate
properly. A mini mum of 4.7µ F c apacitor (0.1 5Ω ≤ ESR 0.5) m ust be connecte d from this pin t o
ground to insure stability.
Functional Block Diagram
VIN 3
Thermal
Shutdown
2 VOUT
+
+
+
1.25V
CURRENT
LIMIT
+
1
GND
(FIXED)
1 Adj
AP1117/AP1117I
Document number: DS31009 Rev. 23 - 2
2 of 13
www.diodes.com
June 2013
© Diodes Incorporated



Part Number AP1117
Description 1A LOW DROPOUT POSITIVE ADJUSTABLE OR FIXED-MODE REGULATOR
Maker Diodes Incorporated - Diodes Incorporated
Total Page 13 Pages
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