参数资料
型号: IRU1010CSTR
厂商: International Rectifier
文件页数: 3/10页
文件大小: 0K
描述: IC REG LDO ADJ 1A 8-SOIC
标准包装: 2,500
稳压器拓扑结构: 正,可调式
输出电压: 2.5 V ~ 3.6 V
输入电压: 最高 7V
电压 - 压降(标准): 1.1V @ 1A
稳压器数量: 1
电流 - 输出: 1A
电流 - 限制(最小): 1.1A
工作温度: 0°C ~ 150°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOIC
包装: 带卷 (TR)
IRU1010(PbF)
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 μ 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 dropout
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 IRU1010.
APPLICATION INFORMATION
Introduction
+
1 Adj
The IRU1010 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 5.5V. This regulator,
unlike the first generation of the three-terminal regula-
tors such as LM117 that required 3V differential between
the input and the regulated output, only needs 1.3V dif-
ferential to maintain output regulation. This is a key re-
quirement for today’s low voltage IC applications that
typically need 3.3V supply and are often generated from
the 5V supply. Other applications such as high speed
memory termination 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 cur-
rent step at the regulator. In addition, the output voltage
tolerances are sometimes tight and they include the tran-
sient response as part of the specification.
The IRU1010 is specifically designed to meet the fast
current transient needs as well as providing an accurate
initial voltage, reducing the overall system cost with the
need for fewer output capacitors.
Rev. 1.7
www.irf.com
3
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