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AP1184P Datasheet Preview

AP1184P Datasheet

4A Ultra Low Dropout Positive Adjustable Regulator

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4A Ultra Low Dropout Positive Adjustable Regulator
AP1184Pwww.DataSheet4U.com
„ Feature
0.7V maximum dropout voltage at 4A load current
Built-in Thermal shutdown
Output current limiting
Adjustable output voltage
Fast transient response
Good noise rejection
Packages: SOP-7L
„ General Description
AP1184P 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 X X X
Low Dropout Regulator Package
P7:SOP-7L
Lead Free
Blank : Normal
L : Lead Free Package
Packing
Blank : Tube
A : Taping
„ Typical Application
3.3V
+
470uF
5V
+
470uF
Adj NC
Vsense Vout
NC Vout
Vctrl
Vin
AP1184P
2.5V/4A
121Ω
121Ω
+
470uF
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev.1.1 Sep 7, 2004
1/8




Anachip

AP1184P Datasheet Preview

AP1184P Datasheet

4A Ultra Low Dropout Positive Adjustable Regulator

No Preview Available !

4A Ultra Low Dropout Positive Adjustable Regulator
„ Block Diagram
Vin
Vctrl
+
+
CURRENT
LIMIT
-
THERMAL
SHUTDOWN
1.25V +
+
„ Pin Configuration
AP1184Pwww.DataSheet4U.com
Vout
Vsense
Adj
Adj
Vsense
NC
Vctrl
1 8 NC
27
Vout
36
4 5 Vin
( AP1184P7 )
„ Pin Descriptions
Pin Numbers with boldface type are for SOP-7L
Name I/O
Description
Adj A resistor divider from this pin to the Vout pin and ground sets the output voltage.
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 to
Vin
I
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 by higher than the Vout pin in order the device to
regulate. A minimum of 100uF capacitor must be connected from this pin to ground to
insure stability.
NC No connection
Vout
O
The output of the regulator. A minimum of 100uF capacitor must be connected from this
pin to ground to insure stability.
Anachip Corp.
www.anachip.com.tw
Rev.1.1 Sep 7, 2004
2/8


Part Number AP1184P
Description 4A Ultra Low Dropout Positive Adjustable Regulator
Maker Anachip
Total Page 8 Pages
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