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IRU1015
1.5A LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR
International
1:211 Rectifier
Data Sheet No. PD94122
IRU1015
FEATU RES
Guaranteed < 1.3V Dropout at F ull Load Current
Fast Transient Response
1% Voltage Reference Initial Accuracy
Output Current Limiting
Built-ln Thermal Shutdown
APPLICATIONS
486DX4 Supply Voltage
P55 I/O Supply Voltage
VGA & Sound Card Applications
Low Voltage High Speed Termination Applications
Standard 3.3V Chip Set and Logic Applications
TYPICAL APPLICATION
51/_,.,rt+r-
1500uF Cf]
1.5A LOW DROPOUT POSITIVE
ADJUSTABLE REGULATOR
DESCRIPTION
The IRU1015 is a Iowdropoutthree-terminal adjustable
regulator with minimum of 1 .5A output current capabil-
ity. This product is specifically designed to provide well
regulated supply for low voltage IC applications such as
486DX4 processor, P55CTM l/O supply as well as high
speed bus termination and low current 3.3V logic sup-
ply. The IRU1015 is also well suited for other applica-
tions such as VGA and sound card. The IRU1015 is
guaranteed to have <1.3V dropout at full load current
making it ideal to provide well regulated outputs of 2.5V
to 3.3V with 4.75V to 7V input supply.
(rl) IRU1015 VoutE - - 3.3V/1.5A
1500uF
Adj 1 li, I
101Sapp1-1.1 - T
Figure1 - Typical application of IRU101 5 in a 5V to 3.3V regulator
Note: P550 is trademark of Intel Corp.
PACKAGE ORDER INFORMATION
n (''C) 3-PIN PLASTIC 3-PIN PLASTIC 2-PIN PLASTIC
TO-220 (T) TO-263 (M) TO-252 (D-Pak)
0 To 150 |RU1015CT |RU1015CM IRU1015CD
Rev. 1.1
06l29l01
IRU1015
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
3-PIN PLASTIC TO-220 (T) 3-PIN PLASTIC TO-263 (M) 2-PIN PLASTIC TO-252 (D-Pak)
VIEW VIEW
1hn 3 1hn 3 \An
T321: Vout 'tt Vout T123:
Adi Adj Adj
6JT=2.7oC/W 6JA=GOOC/W eJA=35°CIW for 1" Square pad 0JA=70°CNV for 0.5" Square 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 |o=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
DropoutVoltage (Note 2) AVo Note 2, lo=1.5A 1.1 1.3 V
Current Limit Vin=3.3V, dVo=100mV 1.6 A
Minimum Load Current Vin=3.3V, Vadj=0V 5 10 mA
(Note 3)
Thermal Regulation 30ms Pulse, Vin-Vo=3V, lo=1.5A 0.01 0.02 %/W
Ripple Rejection f=120Hz, Co=25wF Tantalum,
lo=0.75A, Vin-Vo=3V 60 70 dB
Adjust Pin Current lad] |o=10mA, Vin-Vo-iN, Tj=25°C,
|o=10mA, Vin-Vo-iN 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: Dropout voltage is defined as the minimum dit- 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.
2 Rev. 1.1
06/29/01
