AP1187 Datasheet, PDF (1/6 Pages) Anachip Corp – 1A Ultra Low Dropout Positive Adjustable Regulator

1A Ultra Low Dropout Positive Adjustable Regulator
AP1187
„ Features
• Adjustable output voltage
• 0.6V Maximum Dropout voltage at 1.0A Load
current
• Built-in Thermal Shutdown
• Output Current Limiting
• Fast transient response
• Good noise rejection
• Package: SOP-7L
„ Applications
• PC Motherboard
• LCD Monitor
• Graphic Card
• DVD-Video Player
• NIC/Switch
• Telecom Equipment
• ADSL Modem
• Printer and other Peripheral Equipment
„ Pin Assignments
„ General Description
AP1187 is a 1A 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 switching regulator. One
such application is the new graphic chip sets that
require anywhere from 2.4V to 2.7V supply.
„ Pin Descriptions
( Top View )
ADJ 1
7 NC
V_SENSE 2
V_IN 3
V_CTRL 4
AP1187
6 V_OUT
5 V_IN
SOP-7L
Name
ADJ
V_SENSE
V_IN
V_CTRL
NC
V_OUT
Description
A resistor divider from this pin to the V_OUT
pin and ground sets the output voltage.
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.
The input of the regulator.
This pin is the supply pin for the internal
control circuit as well as the base drive
for the pass transistor.
Not used.
The output of the regulator.
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 Aug 23, 2005
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