PART OBSOLETE –
AP1186
NO ALTERNATE PART
1.5A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
General Description
Features
OBSOLETE – PART DISCONTINUED
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AP1186 is a 1.5A regulator with extremely low dropout voltage.
This product is specifically designed to provide well-regulated
supply for applications requiring 2.8V or lower voltages from 3.3V
ATX power supplies where high efficiency of a switcher can be
achieved without the cost and complexity associated with a
switching regulator. One such application is the new graphic chip
sets that require anywhere from 2.4V to 2.7V supply.
Adjustable or Fixed output voltage 1.5V, 1.8V, 2.5V,
3.3V, 5.0V
0.5V Maximum Dropout voltage at 1.5A Load current
Built-in Thermal Shutdown
Output Current Limiting
Fast transient response
Good noise rejection
Packages: TO220-5L, TO263-5L
Lead Free Finish/RoHS Compliant for Lead Free
products (Note 1)
Ordering Information
AP 1186
Note:
X-X
Package
Vout
K5:TO263-5L
T5:TO220-5L
Blank : Adj
15 : 1.5V
18 : 1.8V
25 : 2.5V
33 : 3.3V
50 : 5.0V
X X
Lead Free
Packing
L : Lead Free Package
-U : Tube
-13: Taping
1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.
Device
Lead-free
AP1186T5
AP1186K5
Tube
Package Packaging
Part Number
(Note 2)
Code
Quantity
Suffix
T5
K5
TO220-5L
TO263-5L
50
50
-U
-U
13” Tape and Reel
Part Number
Quantity
Suffix
NA
800/Tape & Reel
NA
-13
Lead-free
Note:
2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
Typical Application
3V
5V
+
+
470uF
Vin
Vctrl
Vou
t
GND
Vsense
5
4
3
2
1
470uF
2.5
/1.5A
V
+
470uF
AP1186 Rev. 2 - 4
1 of 10
www.diodes.com
MAY 2019
© Diodes Incorporated
AP1186
1.5A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
Block Diagram
Vin
Vout
Vsense
Vctrl
+
+
-
1.25V
+
CURRENT
LIMIT
+
-
THERMAL
SHUTDOWN
Adj
Package Connect Diagram
5 PIN TO263
5 PIN TO220
FRONT VIEW
FRONT VIEW
5
4
3
2
1
5
Vin
Vctrl
Vout
Adj(GND)
Vsense
4
3
2
1
Vin
Vctrl
Vout
Adj(GND)
Vsense
Tab is Vout
Tab is Vout
Pin Descriptions
Name
I/O
Description
Vsense
I
This pin is the positive side of the reference that allows remote load sensing to achieve excellent load
regulation. A minimum of 10uF capacitor must be connected from this pin to ground to insure stability.
Adj
(GND)
A resistor divider from this pin to the Vout pin and ground sets the output voltage.
(GND only for fixed mode)
Vout
O
The output of the regulator. A minimum of 100uF capacitor must be connected from this pin to ground
to insure stability.
Vctrl
I
This pin is the supply pin for the internal control circuit as well as the base drive for the pass transistor.
This pin must always by higher than the Vout pin in order for the device to regulate. A minimum of
100uF capacitor must be connected from this pin to ground to insure stability.
Vin
I
The input of the regulator. Typically a large storage capacitor is connected from this pin to ground to
insure that the input voltage does not sag below the minimum dropout voltage during the load
transient response. This pin must always be higher than Vout in order for the device to regulate.
AP1186 Rev. 2 - 4
2 of 10
www.diodes.com
MAY 2019
© Diodes Incorporated
AP1186
1.5A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
Absolute Maximum Ratings
Symbol
Vin
Vctrl
PD
TST
TOP
Parameter
Input Voltage
Control Input Voltage
Power Dissipation
Storage Temperature
Operating Junction Temperature Range
Rating
16
18
Internally Limited
-65 to +150
0 to +150
Unit
V
V
oC
oC
Electrical Characteristics
Unless otherwise specified, these specifications apply over, Cin = 1uF, Cout = 10uF, and TJ = 0 to 150oC. Typical value refers to TA =
25oC. Vout = Vsense.
SYM.
VREF
Vout
Parameter
Reference
Voltage
Test Condition
o
TA = 25 C,(VIN-VOUT) = 0.5V,IO = 10mA
AP1186-Adj
Vctrl = VIN+1V
o
IOUT = 10mA, TA = 25 C, 2V≦VIN≦12V
AP1186-1.5
Vctrl = VIN+1V
o
IOUT = 10mA, TA = 25 C, 2.3V≦VIN≦12V
AP1186-1.8
Vctrl = VIN+1V
o
IOUT = 10mA, TA = 25 C, 3V≦VIN≦12V
Output Voltage
AP1186-2.5
Vctrl = VIN+1V
o
IOUT = 10mA, TA = 25 C, 3.8V≦VIN≦12V
AP1186-3.3
Vctrl = VIN+1V
o
IOUT = 10mA, TA = 25 C, 5.5V≦VIN≦12V
AP1186-5.0
Vctrl = VIN+1V
IO = 10mA, VOUT+0.5V
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