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IRU1010
1A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR
IntEyrnraticruc/ DataSheetNo.PD94119
1:211 fky:ctifia- IRU1
IA LOW DROPOUT POSITIVE
ADJUSTABLE REGULATOR
FEATU RES DESCRIPTION
" Guaranteed < 1.3V Dropout at F ull Load Current The lRU1010 is a Iowdropout, three-terminal adjustable
I: FastTransient Response regulator with minimum of 1A output current capability.
I: 1% Voltage Reference Initial Accuracy This product is speaTcally designed to provide well regu-
n Built-ln Thermal Shutdown lated supply for low voltage lC applications such as high
I: Available in SOT-223, D-Pak, Ultra Thin-Pak and speed bus termination and low current 3.3V logic sup-
8-Pin SOIC Surface-Mount Packages ply. The lRU1010 is also well suited for other applica-
tions such as VGA and sound cards. The lRU1010 is
APPLICATIONS guaranteed to have <1.3V dropout at full load current
a VGA & Sound Card Applications making it ideal to provide well regulated outputs of 2.5V
" Low Voltage High Speed Termination Applications to 3.61/ with 4.75V to 7V input supply.
a Standard 3.3V Chip Set and Logic Applications
TYPICALAPPLICATION
Wy-tir-tr-
C1 7--7
10uF -
|RU101O
Vout 2 - e. 2.85V/ IA
Ad] 1 7: C2
R2 22uF
1010app1-1.4 154
Figure1 - Typical application of lRU1010 in a 5V to 2.85V SCSI termination regulator
PACKAGE ORDER INFORMATION
T) (°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)
0T0150 |RU101OCD |RU101OCY IRU1010CP IRU1010CS
Rev. 1.4 1
06/29/01
IRU1010
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Vin) B................................................... 7V
Power Dissipation B.................................................... Internally Limited
Storage Temperature Range ...................................... -65°C To 150°C
Operating Junction Temperature Range ..................... 0°C To 150°C
PACKAGE INFORMATION
2-PIN PLASTIC TO-252 (D-Pak) 3-PIN PLASTIC SO-223 (Y) 2-PIN ULTRA THIN-PAK (P) 8-PIN PLASTIC SOIC (S)
FRONT VIEW TOP VIEW FRONT VIEW TOP VIEW
33w Elun 33er \AnE EVout
. . T bi NC [E Cr] Vout
T123 : Tam mom '(i',l,'t' 1 N01; mom
1 = Adj El Adj 1 Cl Ad] Adj E E Vout
6JA=70°CIW for 0.5" Sq pad 9JA=90°CNV for 0.4" Sq pad eJA=70°CIW for 0.5" Sq pad 6JA=55°CIW for 1" Sq pad
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over Cin=1wF, Cout=10wF, and Tj=0 to 150°C.
Typical values refer to Tj=25°C.
PARAMETER SYM TEST CONDITION MIN TYP MAX UNITS
Reference Voltage Vref lo=10mA, Tj=25°C, (Vin-Vo)=1.5V 1.238 1.250 1.262 V
lo=10mA, (Vin-Vo)=1.5V 1.225 1.250 1.275
Line Regulation lo=10mA, 1.3V<(Vin-Vo)<7V 0.2 %
Load Regulation (Note 1) Vin=3.3V, Vadj=0, 10mA
Dropout Voltage (Note 2) AVo Note 2 , lo=1A 1.1 1.3 V
Current Limit Vin=3.3V, dVo=100mV 1.1 A
Minimum Load Current Vin=3.3V, Vadj=0V 5 10 mA
(Note 3)
Thermal Regulation 30ms Pulse, Vin-Vo=3V, lo=1A 0.01 0.02 %NV
Ripple Rejection f=120Hz, Co=25wF Tantalum,
lo=0.5A, Vin-Vo=3V 60 70 dB
Adjust Pin Current lad] lo=10mA, 1hn-Vo=1.5V, Tj=25°C,
lo=10mA, 1hn-Vo=1.5V 55 120 wA
Adjust Pin Current Change lo=10mA, Vin-Vo=1.5V, Tj=25°C 0.2 5 WA
Temperature Stability Vin=3.3V, Vadj=0V, 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 con- Note 3: Minimum load current is defined as the mini-
nections is required in order to maintain accurate data. mum current required at the output in order for the out-
put voltage to maintain regulation. Typically, the resistor
Note 2: Dropoutvoltage is defined as the minimum dif- dividers are selected such that it automatically main-
ferential voltage between Vin and Vout required to main- tains this current.
tain regulation at Vout. It is measured when the output
voltage drops 1% below its nominal value.
Rev. 1.4
06/29/01
