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IRU1117-3.3
800mA LOW DROPOUT POSITIVE FIXED 3.3V REGULATOR
International
Data Sheet No. PD94172
IEER fisctifia- I ”1117-33
800mA LOW DROPOUT POSITIVE
FIXED 3.3V REGULATOR
FEATU RES DESCRIPTION
" Guaranteed < 1.2V Dropout at 800mA Load The |RU1117-33 is a low dropout three-terminal fixed out-
Current put regulator with minimum of 800mA output current ca-
" Fast Transient Response pability. This product is specifically designed to provide
I: 1% Output Voltage Initial Accuracy well regulated supply for low voltage IC applications such
a Built-ln Thermal Shutdown as VGA, sound & DVD cards. The |RU1117-33 is guar-
" Available in SOT-223, D-Pak, Ultra Thin-Pak anteed to have <1.2V dropout at full load current making
and 8-Pin SOIC Surface-Mount Packages it ideal to provide well regulated with 4.75V to 7V input
supply. The |RU1117-33 is specifically designed to be
APPLICATIONS stable with low cost aluminum capacitors while main-
" VGA & Sound Card Applications
I: Standard 3.3V Chip Set and Logic Applications
taining stability with low ESR tantalum caps.
TYPICAL APPLICATION
lRU1117-33
10uF Ci]
Vout 2
/ 3.3V/ 800mA
Ci] 10uF
Figure 1 - Typical application of |RU1117-33 in a 5V to 3.3V regulator
PACKAGE ORDER INFORMATION
Tl (''C) 2-PIN PLASTIC 3-PIN PLASTIC 2-PIN PLASTIC 8-PIN PLASTIC
TO-252 (D-Pak) SOT-223 (Y) Ultra Thin-Pak (P) SOIC (S)
0 To 150 IRU1117-33CD IRU1117-33CY IRU1117-33CP IRU1117-33CS
Rev. 1.3
06l29l01
|RU1117-33
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Vin)
Power Dissipation B....................................................
Storage Temperature Range ......................................
Operating Junction Temperature Range .....................
-65°C To 150°C
0°C To 150°C
Internally Limited
PACKAGE INFORMATION
2-PIN PLASTIC TO-252 (D-Pak)
3-PIN PLASTIC SOT-223 (Y)
2-PIN ULTRA THIN-PAK (P)
8-PIN PLASTIC SOIC (S)
Tab is
6JA=70°CNV for 0.5" Sq pad
Tab is
FRONT VIEW
TOP VIEW
El Vout
El Gnd
eJA=90°CNV for 0.4" Sq pad
Tab is
:1 Gnd
6JA=70°CIW for 0.5" Sq pad
TOP VIEW
Mn E E Vout
NC E i] Vout
NC E E] Vout
Gnd E El Vout
9JA=55°CNV for 1" Sq pad
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over Cin=1wF, Vin=5V, Cout=10wF, and Tj=0 to 125°C.
Typical values refer to Tj=25°C.
PARAMETER SYM TEST CONDITION MIN TYP MAX UNITS
Output Voltage Vo lo=10mA,Tj=250C 3.267 3.300 3.333 V
lo=10mA 3.235 3.300 3.365
Line Regulation lo=10mA, 4.75V
Load Regulation (Note 1) 10mA<|o<800mA 17 mV
Dropout Voltage (Note 2) lo=1A 1.3
lo=800mA 1.2 V
Current Limit dVo=100mV 1.1 A
Thermal Regulation 30ms Pulse, lo=800mA 0.01 0.02 %NV
Ripple Rejection f=120Hz, Co=25wF Tantalum,
Io=0.5A 60 70 dB
Temperature Stability lo=10mA 0.5 %
Long Term Stability Tj=125°C, 1000Hrs 0.3 1 %
RMS Output Noise Tj=25°C, 10HzNote 1: Low duty cycle pulse testing with Kelvin connections is required in order to maintain accurate data.
Note 2: Dropout voltage is defined as the minimum differential voltage between Vin and Vout required to maintain
regulation at Vout. It is measured when the output voltage drops 1% below its nominal value.
Rev. 1.3
06/29/01
