International Rectifier IRU1010CS, IRU1010CP, IRU1010CD, IRU1010CY Datasheet
Data Sheet No. PD94119
IRU1010
1A LOW DROPOUT POSITIVE
ADJUSTABLE REGULATOR
FEATURES
Guaranteed < 1.3V Dropout at Full Load Current
Fast Transient Response
1% Voltage Reference Initial Accuracy
Built-In Thermal Shutdown
Available in SOT-223, D-Pak, Ultra Thin-Pak and
8-Pin SOIC Surface-Mount Packages
APPLICATIONS
VGA & Sound Card Applications
Low Voltage High Speed Termination Applications
Standard 3.3V Chip Set and Logic Applications
TYPICAL APPLICATION
D1
5V
C1
10uF
Vin
3
DESCRIPTION
The IRU1010 is a low dropout, three-terminal adjustable
regulator with minimum of 1A output current capability.
This product is specifically designed to provide well regulated supply for low voltage IC applications such as high
speed bus termination and low current 3.3V logic supply. The IRU1010 is also well suited for other applications such as VGA and sound cards. The IRU1010 is
guaranteed to have <1.3V dropout at full load current
making it ideal to provide well regulated outputs of 2.5V
to 3.6V with 4.75V to 7V input supply.
IRU1010
Vout
2
R1
121
Adj
1
R2
1010app1-1.4
Figure 1 - Typical application of IRU1010 in a 5V to 2.85V SCSI termination regulator
154
C2
22uF
PACKAGE ORDER INFORMATION
Tj (°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 IRU1010CD IRU1010CY IRU1010CP IRU1010CS
2.85V / 1A
Rev. 1.4
06/29/01
1
IRU1010
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Vin) .................................................... 7V
Power Dissipation ..................................................... 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)
Tab is
Vou t
FRONT VIEW
Vout
TOP VIEW
3
Vin
2
Vout
1
Adj
3
Vin
Tab is
1
Adj
Tab is
Vou t
FRONT VIEW
3
Vin
1
Adj
Vin
NC
NC
TOP VIEW
1
2
3
4
8
Vout
7
Vout
6
Vout
5
VoutAdj
θJA=70!C/W for 0.5" Sq pad θJA=90!C/W for 0.4" Sq pad θJA=70!C/W for 0.5" Sq pad θJA=55!C/W for 1" Sq pad
ELECTRICAL SPECIFICATIONS
Unless otherwise specified, these specifications apply over Cin=1µF, Cout=10µF, and Tj=0 to 150!C.
Typical values refer to Tj=25!C.
PARAMETER SYM TEST CONDITION MIN TYP MAX UNITS
Reference Voltage Vref Io=10mA, Tj=25!C, (Vin-Vo)=1.5V 1.238 1.250 1.262 V
Io=10mA, (Vin-Vo)=1.5V 1.225 1.250 1.275
Line Regulation Io=10mA, 1.3V<(Vin-Vo)<7V 0.2 %
Load Regulation (Note 1) Vin=3.3V, Vadj=0, 10mA<Io<1A 0.4 %
Dropout Voltage (Note 2) ∆Vo Note 2 , Io=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, Io=1A 0.01 0.02 %/W
Ripple Rejection f=120Hz, Co=25µF Tantalum,
Io=0.5A, Vin-Vo=3V 60 70 dB
Adjust Pin Current Iadj Io=10mA, Vin-Vo=1.5V, Tj=25!C,
Io=10mA, Vin-Vo=1.5V 55 120 µA
Adjust Pin Current Change Io=10mA, Vin-Vo=1.5V, Tj=25!C 0.2 5 µA
Temperature Stability Vin=3.3V, Vadj=0V, Io=10mA 0.5 %
Long Term Stability Tj=125!C, 1000Hrs 0.3 1 %
RMS Output Noise Tj=25!C, 10Hz<f<10KHz 0.003 %Vo
Note 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.
2
Note 3: Minimum load current is defined as the mini-
mum current required at the output in order for the output voltage to maintain regulation. Typically, the resistor
dividers are selected such that it automatically maintains this current.
Rev. 1.4
06/29/01
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