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| Data Sheet No. PD94137 revA IRU1117-18(PbF) 800mA LOW DROPOUT POSITIVE FIXED 1.8V REGULATOR DESCRIPTION The IRU1117-18 is a low dropout three-terminal fixed output regulator with minimum of 800mA output current capability. This product is specifically designed to provide well regulated supply for low voltage IC applications as well as generating clock supply for PC applications. The IRU1117-18 is guaranteed to have <1.2V dropout at full load current making it ideal to provide well regulated with 3.8V input supply. The IRU1117-18 is specifically designed to be stable with low cost aluminum capacitors while maintaining stability with low ESR tantalum caps. FEATURES Guaranteed < 1.2V Dropout at 800mA Load Current Fast Transient Response 1% Voltage Reference Initial Accuracy Built-In Thermal Shutdown Available in SOT-223, D-Pak, Ultra Thin-PakTM and 8-Pin SOIC Surface-Mount Packages APPLICATIONS Low Voltage IC Supply Applications PC Clock Supply Voltage TYPICAL APPLICATION 3.3V C1 10uF VIN 3 2 1 C2 10uF IRU1117-18 VOUT 1.8V / 800mA Gnd Figure 1 - Typical set-up of the IRU1117-18 in a 3.3V to 1.8V regulator application. PACKAGE ORDER INFORMATION Basic Part (Non-Lead Free) TJ (C) 0 To 125 2-PIN PLASTIC TO-252 (D-Pak) IRU1117-18CD 2-PIN PLASTIC 8-PIN PLASTIC Ultra Thin-PakTM (P) SOIC (S) IRU1117-18CP IRU1117-18CS 3-PIN PLASTIC SOT-223 (Y) IRU1117-18CY Leadfree Part TJ (C) 0 To 125 2-PIN PLASTIC TO-252 (D-Pak) Not available 2-PIN PLASTIC 8-PIN PLASTIC Ultra Thin-PakTM (P) SOIC (S) Not available IRU1117-18CSPbF www.irf.com 3-PIN PLASTIC SOT-223 (Y) Not available 1 IRU1117-18(PbF) ABSOLUTE MAXIMUM RATINGS Input Voltage (VIN) .................................................... Power Dissipation ..................................................... Storage Temperature Range ...................................... Operating Junction Temperature Range ..................... 7V Internally Limited -65C To 150C 0C To 125C PACKAGE INFORMATION 2-PIN PLASTIC TO-252 (D-Pak) 3 2-PIN ULTRA THIN-PAKTM (P) 3 8-PIN PLASTIC SOIC (S) 3-PIN PLASTIC SOT-223 (Y) VIN Tab is VOUT VIN Tab is VOUT 1 Gnd 1 Gnd VIN NC NC Gnd 1 2 3 4 8 7 6 5 VOUT VOUT VOUT VOUT 3 VIN VOUT Gnd Tab is VOUT 2 1 JA=70C/W for 0.5" Sq pad JA=70C/W for 0.5" Sq pad JA=55C/W for 1" Sq pad JA=90C/W for 0.4" Sq pad ELECTRICAL SPECIFICATIONS Unless otherwise specified, these specifications apply over CIN=1F, VIN=5V, COUT=10F, and TJ=0 to 125 C. Typical values refer to TJ=25 C. PARAMETER Output Voltage Line Regulation Load Regulation (Note 1) Dropout Voltage (Note 2) Current Limit Thermal Regulation Ripple Rejection Temperature Stability Long Term Stability RMS Output Noise SYM VO TEST CONDITION Io=10mA, TJ=25 C Io=10mA Io=10mA, 4.75V 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 www.irf.com IRU1117-18(PbF) PIN DESCRIPTIONS PIN# 1 2 3 PIN SYMBOL PIN DESCRIPTION Ground pin. This pin must be connected to ground plane using a low inductance short Gnd connection. VOUT VIN The output of the regulator. This pin is also connected to the tab of the package. An output capacitor must be connected to this pin to insure stability of the regulator. 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. BLOCK DIAGRAM VIN 3 2 VOUT + 1.25V CURRENT LIMIT THERMAL SHUTDOWN + 1 Gnd Figure 2 - Simplified block diagram of the IRU1117-18. www.irf.com 3 IRU1117-18(PbF) (D) TO-252 Package 2-Pin A C B K L M 45 D E O J 7 N Q R P F H G S R1 SYMBOL A B C D E F G H J K L M N O P Q R R1 S MIN 6.477 5.004 0.686 7.417 9.703 0.635 2.286 MAX 6.731 5.207 0.838 8.179 10.084 0.889 BSC C L 4.521 4.623 1.52 1.62 2.184 2.388 0.762 0.864 1.016 1.118 5.969 6.223 1.016 1.118 0.102 0 0.534 0.686 R0.31 TYP R0.51 TYP 0.428 0.588 NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. 4 www.irf.com IRU1117-18(PbF) (P) Ultra Thin-PakTM 2-Pin A A1 K V B H M L P G G1 C C L SYMBOL A A1 B C D E G G1 H K L M N P R U V MAX MIN 6.17 5.91 5.79 5.54 6.27 6.02 2.03 1.70 0.79 0.63 0.33 0.17 2.41 2.16 4.70 4.45 9.68 9.42 1.27 0.76 0.13 0.02 1.14 0.89 0.25 0.25 1.19 0.94 6 2 3.30 2.92 5.08 NOM E U D N R NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. www.irf.com 5 IRU1117-18(PbF) (S) SOIC Package 8-Pin Surface Mount, Narrow Body H A B C E DETAIL-A PIN NO. 1 D 0.380.015 x 45 TF G 8-PIN SYMBOL A B C D E F G H I J K L T MAX MIN 4.98 4.80 1.27 BSC 0.53 REF 0.46 0.36 3.99 3.81 1.72 1.52 0.25 0.10 7 BSC 0.19 5.80 0 0.41 1.37 0.25 6.20 8 1.27 1.57 L DETAIL-A I J K NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. 6 www.irf.com IRU1117-18(PbF) (Y) SOT-223 Package 3-Pin D B SYMBOL A A1 B B1 C D E e e1 H Q Q1 Q2 S T MIN 1.498 0.02 2.895 0.637 0.239 6.299 3.30 2.209 4.496 6.70 0 7 7 0.838 1.092 MAX 1.702 0.11 3.15 0.85 0.381 6.706 3.708 2.953 4.699 7.30 10 16 16 1.05 1.30 E H e e1 S NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS. Q1 T A Q C Q2 B1 A1 www.irf.com 7 IRU1117-18(PbF) PACKAGE SHIPMENT METHOD PKG DESIG D P S Y PACKAGE DESCRIPTION TO-252, (D-Pak) Ultra Thin-PakTM SOIC, Narrow Body SOT-223 PIN COUNT 2 2 8 3 PARTS PER TUBE 75 75 95 80 PARTS PER REEL 2500 2500 2500 2500 T&R Orientation Fig A Fig B Fig C Fig D 1 1 1 1 1 1 Feed Direction Figure A Feed Direction Figure B 1 1 1 1 1 1 Feed Direction Figure C Feed Direction Figure D 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. 8/18/2005 8 www.irf.com |
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