参数资料
型号: IRU1030-33CT
厂商: International Rectifier
文件页数: 3/8页
文件大小: 0K
描述: IC REG LDO 3.3V 3A TO-220-3
标准包装: 50
稳压器拓扑结构: 正,固定式
输出电压: 3.3V
输入电压: 最高 7V
电压 - 压降(标准): 1.1V @ 3A
稳压器数量: 1
电流 - 输出: 3A
电流 - 限制(最小): 3.1A
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: *IRU1030-33CT
IRU1030-33
PIN DESCRIPTIONS
PIN #
1
2
3
PIN SYMBOL
Gnd
V OUT
V IN
PIN DESCRIPTION
This pin must be connected to ground plane using a low inductance short connection.
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
CURRENT
LIMIT
THERMAL
SHUTDOWN
1.25V
+
1 Gnd
Figure 2 - Simplified block diagram of the IRU1030-33.
APPLICATION INFORMATION
Stability
The IRU1030-33 requires the use of an output capacitor as part of the frequency compensation in order to make the
regulator stable. Typical designs for microprocessor applications use standard electrolytic capacitors with a typical
ESR in the range of 50 to 100m V and an output capacitance of 500 to 1000 m F. Fortunately as the capacitance
increases, the ESR decreases resulting in a fixed RC time constant. The IRU1030-33 takes advantage of this
phenomena in making the overall regulator loop stable. For most applications a minimum of 100 m F aluminum
electrolytic capacitor such as Sanyo MVGX series, Panasonic FA series as well as the Nichicon PL series insures
both stability and good transient response.
IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105
TAC Fax: (310) 252-7903
Visit us at www.irf.com for sales contact information
Data and specifications subject to change without notice. 02/01
Rev. 1.2
08/01/02
www.irf.com
3
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