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| NIKO-SEM 5A Adjustable Low Dropout Linear Regulator (LDO) FEATURES L1084 TO-252, 263, 220 GENERAL DESCRIPTION The L1084 is a positive and low dropout three-terminal voltage regulator with 5A output current capability. This device is designed for use in low voltage applications that offers lower dropout voltage and faster transient response. This device is fully protected against over current faults, over temperature operation, reversed input polarity, reversed lead insertion, transient voltage spike ...etc. On-Chips trimming the reference voltage to 1% and features the low dropout of maximum 1.45 volts. The L1084 Series regulators are available in the popular industry standard TO-220, TO-263 and TO-252 packages. Very easy to use, it requires only two external resistors to set the output voltage Low dropout voltage: 1.2V typical at up to 5A Low ground current Fast transient response Current & thermal limiting Line regulation: 0.5% typical Load regulation: 0.5% typical TO-220, TO-263 and TO-252 packages APPLICATIONS High current microprocessor supplies Low voltage logic supply Powering VGA & sound card Portable instrumentation Constant current regulator Post regulator for switching power supply TYPICAL APPLICATION Vin IN L1084 OUT ADJ Vref Vout R1 + Cin 10uF + Cout 10uF Iadj R2 Vo = Vref (1+R2/R1) + Iadj x R2 1. Cin needed if device is far from from filter capacitors. 2. Cout required for stability. - Basic Adjustable Regulator Circuit - 1 MAY-31-2001 NIKO-SEM 5A Adjustable Low Dropout Linear Regulator (LDO) L1084 TO-252, 263, 220 ABSOLUTE MAXIMUM RATINGS Maximum Supply Voltage Power Dissipation Thermal Resistance Junction to Case, JC Thermal Resistance Junction to Ambient, JA TO-220 TO-263 TO-252 7V Internally Limited 2.5 C/W Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering, 10 Seconds) 0 to 125 C -40 to 150 C 260 C 50 C/W 60 C/W 70 C/W ELECTRICAL CHARACTERISTICS (Unless otherwise specified, TA = 25 C.) Parameter Reference Voltage Dropout Voltage Line Regulation Load Regulation Minimum Load Current Symbol VREF Test Conditions VIN = 5V, IOUT = 10mA Typical 1.25V 1.2V 0.5% 0.5% 10mA 55A 7.5A 0.003% of VOUT 72dB Limits 1.23VMin 1.27VMax 1.45V 2% 2.5% 100A 5.0A (Min) VD VREF = 1%, IOUT = 5A REG(LINE) (VOUT + 1.5V) VIN 7V, IOUT = 10mA REG(LOAD) (VIN -VOUT) = 3V, 10mA IOUT 5A IO IADJ ICL VN RA f = 120Hz, CADJ = 22F for ADJ pin, VIN = 5V, IOUT = 5A 1.5V (VIN -VOUT) 5.75V VIN - VOUT = 2V Adjust Pin Current Current Limit RMS Output Noise Ripple Rejection Ratio 60dB (Min) DEVICE SELECTION GUIDE Device Package Marking L1084D TO-252 L1084D L1084S TO-263 (2-Lead) L1084S L1084S3 TO-263 (3-Lead) L1084S3 L1084T TO-220 L1084T 2 MAY-31-2001 NIKO-SEM 5A Adjustable Low Dropout Linear Regulator (LDO) L1084 TO-252, 263, 220 Typical Performance Characteristics Vout=3.3V,Vin=5V,Iout=105mA/5A Cin=10F,Cout=10F MAY-31-2001 3 NIKO-SEM 5A Adjustable Low Dropout Linear Regulator (LDO) L1084 TO-252, 263, 220 PIN CONFIGURATIONS Pin # 1 2 3 Function Adjust Output Input Note: TAB is Output Pin 4 MAY-31-2001 NIKO-SEM 5A Adjustable Low Dropout Linear Regulator (LDO) TO-263 (D2PAK) MECHANICAL DATA mm Min. 14.5 4.2 1.20 2.8 0.3 0.4 9 0.5 0.203 9.5 Typ. 15 Max. 15.8 4.7 1.35 L1084 TO-252, 263, 220 Dimension A B C D E F G Dimension H I J K L M N mm Min. 1.0 9.8 6.5 1.5 0.7 4.83 5.08 1.4 5.33 Typ. 1.5 Max. 1.8 10.3 -0.102 8.5 5 MAY-31-2001 NIKO-SEM 5A Adjustable Low Dropout Linear Regulator (LDO) TO-263 (D2PAK) MECHANICAL DATA mm mm Min. 1.0 9.8 6.5 1.5 0.7 4.83 Typ. 1.5 L1084 TO-252, 263, 220 Dimension A B C D E F G Min. 14.5 4.2 1.20 Typ. 15 Max. 15.8 4.7 1.35 Dimension H I J K L M N Max. 1.8 10.3 2.8 0.3 -0.102 8.5 9 0.4 0.5 0.203 9.5 1.4 5.08 5.33 6 MAY-31-2001 NIKO-SEM 5A Adjustable Low Dropout Linear Regulator (LDO) TO-220 (3-Lead) MECHANICAL DATA mm mm Min. 2.4 1.19 4.4 1.14 2.3 0.26 Typ. L1084 TO-252, 263, 220 Dimension A B C D E F G Min. 9.78 2.61 28.5 14.6 8.4 0.72 Typ. 10.16 2.74 20 28.9 15.0 8.8 0.8 Max. 10.54 2.87 29.3 15.4 9.2 0.88 Dimension H I J K L M N Max. 2.68 1.35 4.8 1.4 2.9 0.66 2.54 1.27 4.6 1.27 2.6 0.46 7 7 MAY-31-2001 NIKO-SEM 5A Adjustable Low Dropout Linear Regulator (LDO) TO-252 (DPAK) MECHANICAL DATA mm mm Min. 6.4 5.2 0.6 0.64 4.4 Typ. 0.8 L1084 TO-252, 263, 220 Dimension A B C D E F G Min. 9.35 2.2 0.48 0.89 0.45 0.03 6 Typ. Max. 10.1 2.4 0.6 1.5 0.6 0.23 6.2 Dimension H I J K L M N Max. 6.6 5.4 1 0.9 4.6 8 MAY-31-2001 |
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