iru1260 International Rectifier Corp., iru1260 Datasheet - Page 3

• Manufacturer Part Number: iru1260
• Description: Dual 6a And 1a Low Dropout Positive Adjustable Regulator -
• Manufacturer: International Rectifier Corp.

PIN DESCRIPTIONS
PIN #
BLOCK DIAGRAM
Rev. 2.1
09/19/02
1
2
3
4
5
6
7
PIN SYMBOL
V
V
V
V
V
Gnd
V
OUT
OUT
V
CTRL
FB
FB
IN
CTRL
1
2
2
1
V
IN
6
1
The control input pin of the regulator. This pin via a 10V resistor is connected to the 5V
supply to provide the base current for the pass transistor of both regulators. This allows
the regulator to have very low dropout voltage which allows one to generate a well regu-
lated 2.5V supply from the 3.3V input. A high frequency, 1mF capacitor is connected
between this pin and V
A resistor divider from this pin to V
application circuit for the divider setting for 2.5V output.
A resistor divider from this pin to the V
application circuit for the divider setting for 1.5V output.
This pin is connected to ground. It is also the tab of the package.
connected from this pin to ground to insure stability.
The power input pin 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 both V
pins by the amount of the dropout voltage in order for the device to regulate properly.(See
data sheet)
The output #1 (low current) of the regulator. A minimum of 100mF capacitor must be
connected from this pin to ground to insure stability.
The output #2 (high current) of the regulator. A minimum of 100mF capacitor must be
PIN DESCRIPTION
Figure 2 - Simplified block diagram of the IRU1260.
SHUTDOWN
THERMAL
IN
pin to insure stability.
www.irf.com
1.20V
OUT
OUT
1 pin and ground sets the output voltage. See
2 pin and ground sets the output voltage. See
+
7 V
2 V
4
3 V
5 V
Gnd
OUT
FB
FB
OUT
1
2
IRU1260
1
2
OUT
3