AP1184 Fixed-mode Regulator Datasheet

AP1184 Datasheet, PDF, Equivalent


Part Number

AP1184

Description

4A Ultra Low Dropout Positive Adjustable or Fixed-mode Regulator

Manufacture

Anachip

Total Page 11 Pages
Datasheet
Download AP1184 Datasheet


AP1184
4A Ultra Low Dropout Positive Adjustable or Fixed-mode Regulator
AP1184
„ Feature
0.7V maximum dropout voltage at 4A load current
Built-in Thermal shutdown
Output current limiting
Adjustable or fixed output voltage
1.5V, 1.8V, 2.5V, 3.3V, 5.0V
Fast transient response
Good noise rejection
Packages: SOP-7L, TO220-5L and TO263-5L
„ General Description
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 X X X X
Low Dropout Regulator Package
Vout
S7:SOP-7L
K5:TO263-5L
T5:TO220-5L
Blank : Adj
15 = 1.5V
18 = 1.8V
25 = 2.5V
33 = 3.3V
50 = 5.0V
Lead Free
Blank : Normal
L : Lead Free Package
Packing
Blank : Tube
A : Taping
„ Typical Application
3.3V
+
470uF
5V
+
470uF
GND
NC
Vsense Vout
Vctrl
Vout
Vin Vin
AP1184-2.5V
2.5V/4A
+
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
1/11

AP1184
4A Ultra Low Dropout Positive Adjustable or Fixed-mode Regulator
„ Block Diagram
AP1184
Vin
Vctrl
+
+
CURRENT
LIMIT
-
THERMAL
SHUTDOWN
1.25V +
+
Vout
Vsense
Adj
„ Pin Configuration
FRONT VIEW
5 Vin
Adj(GND)
4 Vctrl
Vsense
3 Vout
2 Adj(GND)
Vctrl
1 Vsense
Vin
Tab is Vout
(AP1184K5)
1 8 NC
27
Vout
36
4 5 Vin
( AP1184S7 )
FRONT VIEW
5
4
3
2
1
Tab is Vout
(AP1184T5)
Vin
Vctrl
Vout
Adj(GND)
Vsense
„ Pin Descriptions
Pin Numbers with standard type are for TO220-5L, TO263-5L packages, and those 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.
(GND)
(GND only for fixed mode)
This pin is the positive side of the reference that allows remote load sensing to
Vsense
I achieve 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
Vin
I
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.
This pin is the supply pin for the internal control circuit as well as the base drive for
Vctrl
I
the 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
2/11


Features 4A Ultra Low Dropout Positive Adjustable or Fixed-mode Regulator AP1184 „ Fe ature • 0.7V maximum dropout voltage at 4A load current • Built-in Thermal shutdown • Output current limiting Adjustable or fixed output voltage 1 .5V, 1.8V, 2.5V, 3.3V, 5.0V • Fast tr ansient response • Good noise rejecti on • Packages: SOP-7L, TO220-5L and T O263-5L „ General Description AP1184 is a 4A regulator with extremely low dr opout voltage. This product is specific ally 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 s witch can be achieved without the cost and complexity associated with switchin g regulator. One such application is th e new graphic chipsets that requires an ywhere from 2.4V to 2.7V supply. „ Or dering Information AP1184 X X X X Low Dropout Regulator Package Vout S7:SO P-7L K5:TO263-5L T5:TO220-5L Blank : A dj 15 = 1.5V 18 = 1.8V 25 = 2.5V 33 = 3.3V 50 = 5.0V Lead Free Blank : Normal L.
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