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AP1184 FIXED-MODE REGULATOR Datasheet |
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| Part Number | AP1184 |
| Description | 4A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE OR FIXED-MODE REGULATOR |
| Manufacture | Diodes Incorporated |
| Total Page | 12 Pages |
| Datasheet |
Features
NOT RECOMMENDED FOR NEW DESIGN
AP1184
4A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
General Description
0.85V maximum dropout voltage at 4A load current
Built-in Thermal shutdown
Output current limiting
Adjustable or fixed output voltage1.5V, 1.8V, 2.5V,
3.3V, 5.0V
Fast transient response
Good noise rejection
Packages: TO220-5L and TO263-5L
Lead Free Finish/ RoHS Complian (Note 1)
AP1184 is a 4A 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 the switch can be
achieved without the cost and complexity associated with
switching regulator. One such application is the new graphic
chipsets that requires anywhere from 2.4V to 2.7V supply.
Ordering Information
AP1184 XX - XX L - X
Package
K5 : TO263-5L
T5 : TO220-5L
Vout
Blank : Adj
15 = 1.5V
18 = 1.8V
25 = 2.5V
33 = 3.3V
50 = 5.0V
Lead Free
L : Lead Free
Packing
U : Tube
13 : Tape & Reel
Device
Package
Code
Packaging
(Note 2)
Tube
Quantity
Part Number
Suffix
13” Tape and Reel
Quantity
Part Number
Suffix
AP1184K5XXL-U
Lead-free
AP1184K5XXL-13
Lead-free
AP1184T5XXL-U
Lead-free
K5 TO263-5L
50
K5 TO263-5L NA
T5 TO220-5L 50
-U NA NA
NA 800/Tape & Reel -13
-U NA NA
Notes:
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied, see EU Directive 2002/95/EC Annex Notes.
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.
AP1184 Rev. 6 - 3
1 of 12
www.diodes.com
OCTOBER 2014
© Diodes Incorporated
|
NOT RECOMMENDED FOR NEW DESIGN
AP1184
4A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
Pin Assignments
FRONT VIEW
5 Vin
4 Vctrl
3 Vout
2 Adj(GND)
1 Vsense
Tab is Vout
TO263-5L
FRONT VIEW
5
4
3
2
1
Tab is Vout
TO220-5L
Vin
Vctrl
Vout
Adj(GND)
Vsense
Pin Descriptions
Pin Numbers with standard type are for TO220-5L, TO263-5L packages.
Name
I/O
Description
Adj A resistor divider from this pin to the Vout pin and ground sets the output voltage. (GND
(GND)
only for fixed mode)
This pin is the positive side of the reference that allows remote load sensing to achieve
Vsense
I excellent load regulation. A minimum of 10uF capacitor must be connected from this pin
to ground to insure stability.
The input of the regulator. Typically a large storage capacitor is connected from this pin
Vin
I
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.
This pin is the supply pin for the internal control circuit as well as the base drive for the
Vctrl
I
pass transistor. This pin must always be higher than the Vout pin in order to regulate the
device. A minimum of 100uF capacitor must be connected from this pin to ground to
insure stability.
Vout
O
The output of the regulator. A minimum of 100uF capacitor must be connected from this
pin to ground to insure stability.
Block Diagram
Vin
Vctrl
+
+
CURRENT
LIMIT
－
THERMAL
SHUTDOWN
1.25V +
+
Vout
Vsense
Adj
AP1184 Rev. 6 - 3
2 of 12
www.diodes.com
OCTOBER 2014
© Diodes Incorporated
|
| Features | Features NOT RECOMMENDED FOR NEW DESIGN AP1184 4A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE OR FIXED-MODE REGULATOR Ge neral Description 0.85V maximum dr opout voltage at 4A load current Bu ilt-in Thermal shutdown Output curr ent limiting Adjustable or fixed ou tput voltage1.5V, 1.8V, 2.5V, 3.3V, 5.0 V Fast transient response Good noise rejection Packages: TO220-5L and TO263-5L Lead Free Finish/ RoHS Complian (Note 1) AP1184 is a 4A regu lator with extremely low dropout voltag e. This product is specifically designe d to provide well regulated supply for applications requiring 2.8V or lower vo ltages from 3.3V ATX power supplies whe re high efficiency of the switch can be achieved without the cost and complexi ty associated with switching regulator. One such application is the new graphi c chipsets that requires anywhere from 2.4V to 2.7V supply. Ordering Informat ion AP1184 XX - XX L - X Package K5 : TO263-5L T5 : TO220-5L Vout Blank : Adj 15 = 1.5V 18 = 1.8V 2. |
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