AP1184P Adjustable Regulator Datasheet

AP1184P Datasheet, PDF, Equivalent


Part Number

AP1184P

Description

4A Ultra Low Dropout Positive Adjustable Regulator

Manufacture

Anachip

Total Page 8 Pages
Datasheet
Download AP1184P Datasheet


AP1184P
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

AP1184P
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


Features www.DataSheet4U.com AP1184P 4A Ultra Lo w Dropout Positive Adjustable Regulator „ Feature • • • • • • „ General Description AP1184P is a 4A regulator with extremely low dropout voltage. This product is specifically designed to provide well regulated supp ly for applications requiring 2.8V or l ower voltages from 3.3V ATX power suppl ies where high efficiency of the switch can be achieved without the cost and c omplexity associated with switching reg ulator. One such application is the new graphic chipsets that requires anywher e from 2.4V to 2.7V supply. 0.7V maxim um dropout voltage at 4A load current B uilt-in Thermal shutdown Output current limiting Adjustable output voltage Fas t transient response Good noise rejecti on Packages: SOP-7L „ Ordering Inform ation AP1184 X X X Low Dropout Regulato r Package P7:SOP-7L Lead Free Blank : N ormal L : Lead Free Package Packing Bla nk : Tube A : Taping „ Typical Applic ation 3.3V + 470uF Adj Vsense NC 5V + 470uF Vctrl AP1184P NC Vout 2.5V/4A Vout V.
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