参数资料
型号: IRU1015CT
厂商: International Rectifier
文件页数: 3/11页
文件大小: 0K
描述: IC REG LDO ADJ 1.5A TO-220
标准包装: 50
稳压器拓扑结构: 正,可调式
输出电压: 2.5 V ~ 3.3 V
输入电压: 最高 7V
电压 - 压降(标准): 1.1V @ 1.5A
稳压器数量: 1
电流 - 输出: 1.5A
电流 - 限制(最小): 1.6A
工作温度: 0°C ~ 150°C
安装类型: 通孔
封装/外壳: TO-220-3
供应商设备封装: TO-220AB
包装: 管件
其它名称: *IRU1015CT
IRU1015-CT
IRU1015-CT-ND
IRU1015
PIN DESCRIPTIONS
PIN #
1
2
3
PIN SYMBOL
Adj
V OUT
V IN
PIN DESCRIPTION
A resistor divider from this pin to the V OUT pin and ground sets the output voltage.
The output of the regulator. A minimum of 10 m F 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 OUT
in order for the device to regulate properly.
BLOCK DIAGRAM
V IN 3
+
2 V OUT
1.25V
CURRENT
LIMIT
THERMAL
SHUTDOWN
Figure 2 - Simplified block diagram of the IRU1015.
APPLICATION INFORMATION
Introduction
+
1 Adj
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-
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.
Rev. 1.3
08/20/02
www.irf.com
3
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