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| LESHAN RADIO COMPANY, LTD. General Description The LR1084 is a series of low dropout positive voltage regulators with a maximum dropout of 1.5V at 5A of load current. The series features on-chip thermal limiting which provides protection against any combination of overload and ambient temperatures that would create excessive junction temperatures. It also includes a trimmed bandgap reference and a current limiting circuit. The LR1084 is available in 1.5V, 1.8V, 2.5V, 2.85V, 3.3V and 5.0Vversions. The fixed versions integrate the adjust resistors. It is also available in an adjustable version which can set the output voltage with two external resistors. The LR1084 series is available in standard packages of TO-263-2L, TO-263-3L, TO-220 and TO-252. Features Low Dropout Voltage: 1.3V Typically at 5A Current Limiting and Thermal Protection Output Current: 5A Current Limit: 6.5A Operating Junction Temperature Range: 0 to 125oC Line Regulation: 0.015% (Typical) Load Regulation: 0.2% (Typical) Applications High Efficiency Linear Regulators Battery Chargers Post Regulation for Switching Supply Microprocessor Supply Desktop PCs, RISC and Embedded Processors' Supply TO-263-3L TO-263-2L TO-252 TO-220 Figure 1. Package Types of LR1084 LR1084-1/12 LESHAN RADIO COMPANY, LTD. Pin Configuration T Package (TO-220) 3 2 1 D Package (TO-252) 3 INPUT INPUT OUTPUT ADJ/GND 1 ADJ/GND 2 OUTPUT S Package (TO-263-3L) 3 2 1 INPUT OUTPUT ADJ/GND S Package (TO-263-2L) 3 2 1 INPUT OUTPUT (TAB) ADJ/GND Figure 2. Pin Configuration of LR1084 (Top View) LR1084-2/12 LESHAN RADIO COMPANY, LTD. Ordering Information Part Number Marking ID Packing Type LR1084D-ADJ LR1084D-ADJ Tube/Tape/Reel TO-252 0 to 125 C LR1084D-1.5 LR1084D-1.5 LR1084D-1.8 LR1084D-1.8 LR1084D-2.5 LR1084D-2.5 LR1084D-2.85 LR1084D-2.85 LR1084D-3.3 LR1084D-3.3 LR1084D-5.0 LR1084D-5.0 oC LR1084T-ADJ LR1084T-ADJ Tube TO-220 0 to 125 LR1084T-1.5 LR1084T-1.5 LR1084T-1.8 LR1084T-1.8 LR1084T-2.5 LR1084T-2.5 LR1084T-2.85 LR1084T-2.85 LR1084T-3.3 LR1084T-3.3 LR1084T-5.0 LR1084T-5.0 o LR1084S-ADJ LR1084S-ADJ TO-263-3L Tube/Tape/Reel 0 to 125 C LR1084S-1.5 LR1084S-1.5 LR1084S-1.8 LR1084S-1.8 LR1084S-2.5 LR1084S-2.5 LR1084S-2.85 LR1084S-2.85 LR1084S-3.3 LR1084S-3.3 LR1084S-5.0 LR1084S-5.0 LR1084S2-ADJ LR1084S2-ADJ Tube/Tape/Reel TO-263-2L 0 to 125oC LR1084S2-1.5 LR1084S2-1.5 LR1084S2-1.8 LR1084S2-1.8 LR1084S2-2.5 LR1084S2-2.5 LR1084S2-2.85 LR1084S2-2.85 LR1084S2-3.3 LR1084S2-3.3 LR1084S2-5.0 LR1084S2-5.0 Some of our products are available in Lead Free packages; If buyers need Lead Free product, please add -E1 after the part number in your order. For example, LR358M is a standard tin-lead product, LR358M-E1 means a Lead Free product. o Package Temperature Range LR1084 X - Y Circuit Type Package ADJ: Adjustable Output 1.5: Fixed Output 1.5V 1.8: Fixed Output 1.8V 2.5: Fixed Output 2.5V 2.85: Fixed Output 2.85V 3.3: Fixed Output 3.3V 5.0: Fixed Output 5.0V D: TO-252 T: TO-220 S: TO-263-3L S2: TO-263-2L LR1084-3/12 LESHAN RADIO COMPANY, LTD. Absolute Maximum Ratings (Note 1) Parameter Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering, 10 sec.) ESD (Human Body Model) Symbol TJ TS TLEAD ESD -65 Min Max 150 150 300 2000 Unit oC o C C o V Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under"Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability. Recommended Operating Conditions Parameter Input Voltage Operating Junction Temperature Range Symbol VIN TJ 0 Min Max 12 125 Unit V o C LR1084-4/12 LESHAN RADIO COMPANY, LTD. Electrical Characteristics Typicals and limits appearing in normal type apply for TJ = 25oC. Limits appearing in Boldface type apply over the entire operating junvtion temperature range. Parameter Reference Voltage Symbol VREF Conditions LR1084-ADJ, IOUT = 10mA, VIN -VOUT = 3V, 10mA IOUT 5A, 1.5V VIN - VOUT LR1084-1.5, IOUT = 0mA, VIN = 4.5V, 10mA IOUT 5A, 3.1V VIN LR1084-1.8, IOUT = 0mA, VIN = 4.8V, 10mA IOUT 5A, 3.4V VIN LR1084-2.5, IOUT = 0mA, VIN = 5.5V, 10mA IOUT 5A, 4.1V VIN LR1084-2.85, IOUT = 0mA, VIN = 6V, 10mA IOUT 5A, 4.5V VIN LR1084-3.3, IOUT = 0mA, VIN = 6.3V, 10mA IOUT 5A, 4.9V VIN LR1084-5.0, IOUT = 0mA, VIN = 8V, 10mA IOUT 5A, 6.6V VIN Line Regulation VOUT LR1084-ADJ, IOUT = 10mA, 2.85V LR1084-1.5, IOUT = 10mA, 3.1V LR1084-1.8, IOUT = 10mA, 3.4V LR1084-2.5, IOUT = 10mA, 4.1V LR1084-2.85, IOUT = 10mA, 4.5V LR1084-3.3, IOUT = 10mA, 4.9V LR1084-5.0, IOUT = 10mA, 6.6V Min 1.238 1.225 Typ 1.250 1.250 Max 1.262 1.270 Unit V 5V Output Voltage VOUT V 6V 1.485 1.47 1.5 1.5 1.515 1.53 6V 1.782 1.764 2.475 2.45 1.8 1.8 2.5 2.5 1.818 1.836 2.525 2.55 7V 8V 2.822 2.793 2.85 2.85 2.879 2.907 8V 3.267 3.234 3.3 3.3 3.333 3.366 10V 4.95 4.9 5 5 0.015 0.035 0.5 1 0.5 1 0.5 1 0.5 1 0.5 1 0.5 1 5.05 5.1 0.2 0.2 6 6 6 6 6 6 6 6 6 6 10 10 % mV mV mV mV mV mV VIN 10V VIN 10V VIN 10V VIN 10V VIN 10V VIN 10V VIN 10V LR1084-5/12 LESHAN RADIO COMPANY, LTD. Electrical Characteristics (Continued) Typicals and limits appearing in normal type apply for TJ = 25oC. Limits appearing in Boldface type apply over the entire operating junvtion temperature range. Parameter Load Regulation Symbol VOUT Conditions LR1084-ADJ, 0mA I OUT 5A, VIN - VOUT = 3V LR1084-1.5, 0mA I OUT 5A, VIN - VOUT = 3V LR1084-1.8, 0mA I OUT 5A, VIN - VOUT = 3V LR1084-2.5, 0mA I OUT 5A, VIN - VOUT = 3V LR1084-2.85, 0mA I OUT 5A, VIN - VOUT = 3V LR1084-3.3, 0mA I OUT 5A, VIN - VOUT = 3V LR1084-5.0, 0mA I OUT 5A, VIN - VOUT = 3V Dropout Voltage Current Limit Minimum Load Current Quiescent Current Ripple Rejection ILIMIT IO = 5A, VREF, VOUT= 1% VIN - VOUT = 3V, VIN = 10V (LR1084-ADJ) VIN = 10V (LR1084) fRIPPLE = 120Hz, COUT = 25 F Tantalum, IOUT = 5A, VIN - VOUT = 3V VIN = 4.25V, IOUT = 10mA 10mA IOUT 5A, 1.5V (VIN -VOUT) 4.5V IOUT = 10mA, VIN - VOUT = 1.5 TA = 125oC, 1000Hrs 10Hz QJC TO-263 TO-220 TO-252 f 10kHz 60 5.5 Min Typ 0.1 0.2 3 7 3 7 3 7 3 7 3 7 5 10 1.3 6.5 3 5 72 10 10 Max 0.3 0.4 15 20 15 20 15 20 15 20 15 20 20 35 1.5 Unit % mV mV mV mV mV mV V A mA mA dB Adjust Pin Current Adjust Pin Current Change Temperature Stability Long Term Stability RMS Noise (% of VOUT) Thermal Resistance Junction -to-Case 55 0.2 120 5 A A 0.5 0.5 0.003 3 3 0 % % % C/W LR1084-6/12 LESHAN RADIO COMPANY, LTD. Typical Performance Characteristics 1.50 1.45 1.40 1.35 2.53 2.52 Dropout Voltage(V) 1.30 1.25 1.20 1.15 1.10 1.05 1.00 0.95 0.90 0.85 0.80 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Output Voltage(V) 2.51 2.50 2.49 2.48 2.47 0 25 50 75 100 125 Output Current(A) TJ( C) o Figure 3. Dropout Voltage vs. Output Current Figure 4. Output Voltage vs. Temperature 0.0 80 75 70 -0.2 Line regulation(mV) 65 60 Iadj(uA) 0 25 50 75 100 125 -0.4 55 50 45 40 35 -0.6 -0.8 30 25 -1.0 o 20 0 1 2 3 4 5 TJ( C) Io(A) ADJUST PIN CURRENT VS. OUTPUT CURRENT Figure 5. Line Regulation vs. Temperature Figure 6. Adjust Pin Current vs. Output Current LR1084-7/12 LESHAN RADIO COMPANY, LTD. Typical Performance Characteristics (Continued) 1.40 8 7 Dropout Voltage(V) 1.35 Short Circuit Current(A) 0 25 50 75 100 125 6 5 4 3 2 1 1.30 1.25 1.20 0 0 2 4 6 8 10 12 TJ( C) o Dropout Voltage(V) Short Circuit Current vs Dropout Voltage Figure 7. Dropout Voltage vs. Temperature Figure 8. Short Circuit Current vs. Dropout Voltage Figure 9. Load Transient Response Figure 10. Line Transient Response LR1084-8/12 LESHAN RADIO COMPANY, LTD. Typical Applications Adjustable Output Voltage VOUT=VREF*(1+R2/R1)+IADJ*R2 Or VOUT=VREF(1+R2/R1) , VREF=1.25V VIN 3 IN 2 LR1084-XX OUT VOUT 10UF 1 22UF Fig 11. Fixed Output Regulator VIN 3 IN 2 LR1084-ADJ ADJ OUT VOUT=1.25V 10UF 22UF R1 120 1 FIG 12 . Adjustable Output 1.25 Voltage Application Circuit VIN 3 IN 2 LR1084-ADJ ADJ OUT VOUT 10UF 22UF R1 120 R2 VREF 1 FIG 13 . Adjustable Output Voltage Application Circuit VIN 3 IN 2 LR1084-ADJ ADJ OUT VOUT 10UF 22UF R1 120 R2 VREF 1 10UF FIG 14 . Adjustable Output Voltage Application with improved Ripple Rejection LR1084-9/12 LESHAN RADIO COMPANY, LTD. Mechanical Dimensions TO-263-3L TO-263 Unit: mm LR1084-10/12 LESHAN RADIO COMPANY, LTD. Mechanical Dimensions (Continued) TO-263-2L Unit: mm LR1084-11/12 LESHAN RADIO COMPANY, LTD. Mechanical Dimensions (Continued) TO-220 Unit: mm LR1084-12/12 |
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