Diodes AP1186 - Manual (Page 2)

AP1186
1.5A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
AP1186 Rev. 1 2 of 9 MARCH 2007
www.diodes.com © Diodes Incorporated
Block Diagram
THERMAL
SHUTDOWN
Vout
Adj
1.25V
+
CURRENT
LIMIT
Vin
+ -
+
+
-
Vsense
Vctrl
Package Connect Diagram
5 PIN TO263 5 PIN TO220
Tab is Vout
FRONT VIEW
Tab is Vout
FRONT VIEW
Vout
Vsense
Adj(GND)
Vctrl
Vin 5
2
1
4
3
3
2
1 Vout
Vsense
Adj(GND)
Vctrl
Vin
4
5
Pin Descriptions
Name I/O Description
Vsense I
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.
Adj
(GND)
A resistor divider from this pin to the Vout pin and ground sets the output voltage.
(GND only for fixed mode)
Vout O
The output of the regulator. A minimum of 100uF capacitor must be connected from this pin to ground
to insure stability.
Vctrl I
This pin is the supply pin for the internal control circuit as well as the base drive for the pass transistor.
This pin must always by higher than the Vout pin in order for the device to regulate. A minimum of
100uF capacitor must be connected from this pin to ground to insure stability.
Vin I
The input of the 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 higher than Vout in order for the device to regulate.