AP1084
5A Low Dropout Positive Adjustable or Fixed-Mode Regulator
Block Diagram
Vin
3
2 Vout
+
+
－
1.25V
CURRENT
LIMIT
+
Thermal
Shutdown
1
Adj
－
+
Connection Diagram
TO263
FRONT VIEW
TO252
FRONT VIEW
3
2
1
Tab is Vout
Vin
Vout
Adj (GND)
Tab is Vout
TO220
FRONT VIEW
3
2
Vout
Adj (GND)
1
Vin
Vout
Adj (GND)
3
2
1
Vin
Tab is Vout
Pin Descriptions
NAME
Adj (GND)
I/O
PIN #
1
FUNCTION
Adjustable (Ground only for fixed mode)
The output of the regulator. A minimum of 10uF capacitor must be
connected from this pin to ground to insure stability.
The input pin of regulator. Typically a large storage capacitor is connected
from this 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 1.4V higher than Vout in order for the device to regulate
properly.
Vout
O
2
Vin
I
3
Anachip Corp.
www.anachip.com.tw
Rev.1.0 Aug.27, 2004
2/8
ANACHIP [ ANACHIP CORP ]
