iru1117-18 International Rectifier Corp., iru1117-18 Datasheet - Page 3

• Manufacturer Part Number: iru1117-18
• Description: 800ma Dropout Positive Fixed 1.8v Regulator
• Manufacturer: International Rectifier Corp.

PIN DESCRIPTIONS
PIN#
BLOCK DIAGRAM
Rev. 1.1
06/29/01
1
2
3
Vin 3
PIN SYMBOL
Vout
Gnd
Vin
SHUTDOWN
THERMAL
CURRENT
LIMIT
Ground pin. This pin must be connected to ground plane using a low inductance short
connection.
The output of the regulator. This pin is also connected to the tab of the package. An output
capacitor must be connected to this pin to insure stability of the regulator.
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 1.3V higher than Vout in order
for the device to regulate properly.
PIN DESCRIPTION
Figure 2 - Simplified block diagram of the IRU1117-18
+
1117-18blk1-1.0
1.25V
IRU1117-18
+
2 Vout
1 Gnd
3