800mA DROPOUT POSITIVE FIXED OUTPUT REGULATOR Guaranteed 1.3V Dro
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IRU1117-33
800mA DROPOUT POSITIVE FIXED OUTPUT REGULATOR
Guaranteed 1.3V Dropout Full Load Current Fast Transient Response Output Voltage Initial Accuracy Built-in Thermal Shutdown Available SOT-223, D-Pak, Ultra Thin-Pak 8-pin SOIC Surface-mount Packages
DESCRIPTION
IRU1117-33 dropout three-terminal fixed output regulator with minimum 800mA output current capability. This product specifically designed provide well regulated supply voltage applications such VGA, sound cards. IRU1117 guaranteed have <1.3V dropout full load current making ideal provide well regulated with 4.75V input supply. IRU1117 specifically designed stable with cost aluminimum capacitors while maintaining stability with tantalum caps.
APPLICATIONS
Sound Card Applications Standard 3.3V Chipset Logic Applications
TYPICAL APPLICATION
10uF
10uF
IRU1117-33 IRU1010-33 IRU1117-33
Vout
3.3V 800mA
1010-33app1-1.0
Typical application IRU1117-33 3.3V regulator
PACKAGE ORDER INFORMATION
(°C) 2-PIN PLASTIC TO-252 IRU1117-33CD 3-PIN PLASTIC SOT-223 IRU1117-33CY 2-PIN PLASTIC ULTRA THIN-PAK IRU1117-33CP 8-PIN PLASTIC SOIC IRU1117-33CS
Rev. 10/30/00
2-21
IRU1117-33
ABSOLUTE MAXIMUM RATINGS
Input Voltage Power Dissipation Internally Limited Storage Temperature Range -65° 150° Operating Junction Temperature Range 150°
PACKAGE INFORMATION
2-PIN PLASTIC TO-252
FRONT VIEW
3-PIN PLASTIC SOT-223
VIEW
2-PIN ULTRA THIN-PAK
FRONT VIEW
8-PIN PLASTIC SOIC
VIEW
Vout
Vout
Vout
Vout
Vout Vout Vout Vout
JA=70°C/W 0.5"
JA=90°C/W 0.4"
JA=70°C/W 0.5"
JA=55°C/W
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over, Cin=1µF, Vin=5V, Cout =10µF, Tj=0 125°C.Typical values refer Tj=25°C. PARAMETER Output Voltage Line Regulation Load Regulation (Note Dropout Voltage (Note Current Limit Thermal Regulation Ripple Rejection Temperature Stability Long Term Stability Output Noise TEST CONDITION Io=10mA,Tj=25°C Io=10mA Io=10mA, 4.75V<Vin<7V 10mA<Io<800mA Io=800mA dVo=100mV Pulse, Io=800mA f=120HZ, Co=25µF Io=0.5A Io=10mA Tj=125°C, 1000 Tj=25°C 10hz<f<10khz 0.003 0.01 0.02 3.267 3.235 3.300 3.300 3.333 3.365 UNITS
Note duty cycle pulse testing with Kelvin connections required order maintain accurate data. Note Dropout voltage defined minimum differential voltage between Vout required maintain regulation Vout measured when output voltage drops below nominal value.
2-22
Rev. 10/30/00
IRU1117-33
DESCRIPTIONS
PIN# SYMBOL Description pin. This must connected plane using inductance short connection. output regulator. This also connected package. output capacitor must connected this insure stability regulator. Input regulator.
Vout
BLOCK DIAGRAM
Vout
1504
1.25V CURRENT LIMIT
THERMAL SHUTDOWN
1010-33blk1-1.0
Figure Simplified block diagram IRU1117-33
Rev. 10/30/00
2-23
IRU1117-33
Notes
2-24
Rev. 10/30/00
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