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| Data Sheet No. PD94127 IRU1050-33 5A LOW DROPOUT POSITIVE FIXED 3.3V REGULATOR DESCRIPTION The IRU1050-33 is a low dropout three-terminal fixed 3.3V output regulator with minimum of 5A output current capability. This product is specifically designed to provide well regulated supply for low voltage IC applications requiring 3.3V output. The IRU1050-33 is guaranteed to have <1.3V dropout at full load current making it ideal to provide well regulated output with supply voltage as low as 4.6V input. FEATURES Guaranteed < 1.3V Dropout at Full Load Current Fast Transient Response 1% Voltage Reference Initial Accuracy Output Current Limiting Built-In Thermal Shutdown APPLICATIONS Standard 3.3V Chip Set and Logic Applications TYPICAL APPLICATION 5V C1 330uF VIN 3 IRU1050-33 VOUT 2 C2 330uF 3.3V / 5A Gnd 1 Figure 1 - Typical application of IRU1050-33. PACKAGE ORDER INFORMATION TJ (C) 0 To 150 3-PIN PLASTIC T0-220 (T) IRU1050-33CT 3-PIN PLASTIC TO-263 (M) IRU1050-33CM 2-PIN PLASTIC Ultra Thin-PakTM (P) IRU1050-33CP 2-PIN PLASTIC TO-252 (D-Pak) IRU1050-33CD Rev. 1.4 08/01/02 www.irf.com 1 IRU1050-33 ABSOLUTE MAXIMUM RATINGS Input Voltage (VIN) .................................................... Power Dissipation ..................................................... Storage Temperature Range ...................................... Operating Junction Temperature Range ..................... 7V Internally Limited -65C To 150C 0C To 150C PACKAGE INFORMATION 3-Pin Plastic TO-220 (T) FRONT VIEW 3-Pin Plastic TO-263 (M) FRONT VIEW 2-Pin Plastic ULTRA THIN-PAKTM (P) FRONT VIEW 2-Pin Plastic TO-252 (D-Pak) FRONT VIEW Tab is VOUT 3 VIN VOUT Gnd Tab is VOUT 3 VIN VOUT Gnd 3 VIN Tab is V OUT 3 VIN 2 1 2 Tab is VOUT 1 1 Gnd 1 Gnd JT=2.7C/W JA=60C/W JA=35C/W for 1" Square pad JA=70C/W for 1" Square pad JA=70C/W for 0.5" Sq pad ELECTRICAL SPECIFICATIONS Unless otherwise specified, these specifications apply over CIN=1mF, COUT=10mF, and TJ=0 to 1508C. Typical values refer to TJ=258C. PARAMETER Output Voltage Line Regulation Load Regulation (Note 1) Dropout Voltage (Note 2) Current Limit Minimum Load Current (Note 3) Thermal Regulation Ripple Rejection Temperature Stability Long Term Stability RMS Output Noise SYM Vo TEST CONDITION Io=10mA, TJ=258C, VIN=5V Io=10mA, VIN=5V Io=10mA, 4.7V 1.1 5.1 5 0.01 60 70 0.5 0.3 0.003 1 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. Note 3: Minimum load current is defined as the minimum 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. 2 www.irf.com Rev. 1.4 08/01/02 IRU1050-33 PIN DESCRIPTIONS PIN # PIN SYMBOL Gnd 1 2 VOUT PIN DESCRIPTION This pin must be connected to ground plane using a low inductance short connection. The output of the regulator. A minimum of 10mF capacitor must be connected from this pin to ground to insure stability. The input pin of the regulator. Typically a large storage capacitor is connected from this pin to ground to insure that the input voltage does not sag below the minimum dropout voltage during the load transient response. This pin must always be 1.3V higher than VOUT in order for the device to regulate properly. 3 VIN BLOCK DIAGRAM VIN 3 2 VOUT + 1.25V CURRENT LIMIT + THERMAL SHUTDOWN Figure 1 - Simplified block diagram of the IRU1050-33. 1 Gnd APPLICATION INFORMATION Stability The IRU1050-33 requires the use of an output capacitor as part of the frequency compensation in order to make the regulator stable. Typical designs for microprocessor applications use standard electrolytic capacitors with a typical ESR in the range of 50 to 100mV and an output capacitance of 500 to 1000mF. Fortunately as the capacitance increases, the ESR decreases resulting in a fixed RC time constant. The IRU1050-33 takes advantage of this phenomena in making the overall regulator loop stable. For most applications a minimum of 100mF aluminum electrolytic capacitor such as Sanyo MVGX series, Panasonic FA series as well as the Nichicon PL series insures both stability and good transient response. IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105 TAC Fax: (310) 252-7903 Visit us at www.irf.com for sales contact information Data and specifications subject to change without notice. 02/01 Rev. 1.4 08/01/02 www.irf.com 3 IRU1050-33 (D) TO-252 Package 2-Pin A C B K L M 458 D E O J N 78 Q P F H G R S R1 SYMBOL MIN MAX A 6.477 6.731 B 5.004 5.207 C 0.686 0.838 D 7.417 8.179 E 9.703 10.084 F 0.635 0.889 2.286 BSC G H 4.521 4.623 J &1.52 &1.62 K 2.184 2.388 L 0.762 0.864 M 1.016 1.118 N 5.969 6.223 O 1.016 1.118 P 0 0.102 Q 0.534 0.686 R R0.31 TYP R1 R0.51 TYP S 0.428 0.588 C L NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. 4 www.irf.com Rev. 1.4 08/01/02 IRU1050-33 (M) TO-263 Package 3-Pin A K S V B H M E U L P D G N C R C L SYMBOL A B C D E G H K L M N P R S U V MIN MAX 10.05 10.312 8.28 8.763 4.31 4.572 0.66 0.91 1.14 1.40 2.54 REF 14.73 15.75 1.40 1.68 0.00 0.254 2.49 2.74 0.33 0.58 2.286 2.794 08 88 2.41 2.67 6.50 REF 7.75 REF NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. Rev. 1.4 08/01/02 www.irf.com 5 IRU1050-33 (P) Ultra Thin-PakTM 2-Pin A A1 K E U V B H M L P G G1 N C C L R D SYMBOL A A1 B C D E G G1 H K L M N P R U V MIN MAX 5.91 6.17 5.54 5.79 6.02 6.27 1.70 2.03 0.63 0.79 0.17 0.33 2.16 2.41 4.45 4.70 9.42 9.68 0.76 1.27 0.02 0.13 0.89 1.14 0.25 0.25 0.94 1.19 28 68 2.92 3.30 5.08 NOM NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. 6 www.irf.com Rev. 1.4 08/01/02 IRU1050-33 (T) TO-220 Package 3-Pin H1 L b1 e3 e e1 C L E Q b R E-PIN CP a (5x) C1 A J1 D F C L SYMBOL MIN MAX A 4.06 4.83 a 38 7.58 b 0.63 1.02 b1 1.14 1.52 C1 0.38 0.56 CP 3.71D 3.96D D 14.22 15.062 E 9.78 10.54 e 2.29 2.79 e1 4.83 5.33 e3 1.14 1.40 F 1.14 1.40 H1 5.94 6.55 J1 2.29 2.92 L 13.716 14.22 Q 2.62 2.87 R 5.588 6.17 NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. Rev. 1.4 08/01/02 www.irf.com 7 IRU1050-33 PACKAGE SHIPMENT METHOD PKG DESIG D M P T TO-263 Ultra Thin-Pak TO-220 TM PACKAGE DESCRIPTION TO-252, (D-Pak) PIN COUNT 2 3 2 3 PARTS PER TUBE 75 50 75 50 PARTS PER REEL 2500 750 2500 --- T&R Orientation Fig A Fig B Fig C --- 1 1 1 1 1 1 Feed Direction Figure A Feed Direction FigureB 1 1 1 Feed Direction FigureC IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105 TAC Fax: (310) 252-7903 Visit us at www.irf.com for sales contact information Data and specifications subject to change without notice. 02/01 8 www.irf.com Rev. 1.4 08/01/02 |
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