IRU1015CM International Rectifier, IRU1015CM Datasheet - Page 3

• Manufacturer Part Number: IRU1015CM
• Description: IC REG ADJ LDO 1.5A TO-263-3
• Manufacturer: International Rectifier

Specifications of IRU1015CM

• Regulator Topology: Positive Adjustable
• Voltage - Output: 2.5 ~ 3.3 V
• Voltage - Input: Up to 7V
• Voltage - Dropout (typical): 1.1V @ 1.5A
• Number Of Regulators: 1
• Current - Output: 1.5A
• Current - Limit (min): 1.6A
• Operating Temperature: 0°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: TO-263-3, D²Pak (3 leads + Tab), TO-263AA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *IRU1015CM; IRU1015-CM; IRU1015-CM

PIN DESCRIPTIONS
PIN #
BLOCK DIAGRAM
APPLICATION INFORMATION
Introduction
The IRU1015 adjustable Low Dropout (LDO) regulator is
a three-terminal device which can easily be programmed
with the addition of two external resistors to any volt-
ages within the range of 1.25 to 5.5 V.This regulator un-
like the first generation of the three-terminal regulators
such as LM117 that required 3V differential between the
input and the regulated output, only needs 1.3V differen-
tial to maintain output regulation. This is a key require-
ment for today’s microprocessors that need typically
3.3V supply and are often generated from the 5V sup-
ply. Another major requirement of these microproces-
Rev. 1.3
08/20/02
1
2
3
V
IN
PIN SYMBOL
3
V
Adj
V
OUT
IN
SHUTDOWN
THERMAL
CURRENT
LIMIT
A resistor divider from this pin to the V
The output of the regulator. A minimum of 10mF capacitor must be connected from this pin
to ground to insure stability.
The 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 drop out
voltage during the load transient response. This pin must always be 1.3V higher than V
in order for the device to regulate properly.
PIN DESCRIPTION
Figure 2 - Simplified block diagram of the IRU1015.
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sors is the need to switch the load current from zero to
full load in tens of nanoseconds at their pins, which
translates to an approximately 300 to 500ns current step
at the regulator. In addition, the output voltage toler-
ances are sometimes tight and they include the tran-
sient response as part of the specification.
The IRU1015 is specifically designed to meet the fast
current transient needs as well as provide an accurate
initial voltage, reducing the overall system cost with the
need for fewer output capacitors.
OUT
pin and ground sets the output voltage.
1.25V
+
IRU1015
2 V
1 Adj
OUT
OUT
3