LT1085CT-3.3#PBF Analog Devices

LT1083/LT1084/LT1085 Fixed 3A, 5A, 7.5A Low Dropout Positive Fixed Regulators Fea T Descrip T n Three-Terminal 3.3V, 3.6V, 5V and 12V The LT 1083 series of positive adjustable regulators are n Output Current of 3A, 5A or 7.5A designed to provide 3A, 5A and 7.5A with higher efficiency n Operates Down to 1V Dropout than currently available devices. All internal circuitry is n Guaranteed Dropout Voltage at Multiple Current Levels designed to operate down to 1V input to output differential n Line Regulation: 0.015% and the dropout voltage is fully specified as a function n Load Regulation: 0.1% of load current. Dropout is guaranteed at a maximum of n 100% Thermal Limit Functional Test 1.5V at maximum output current, decreasing at lower load n Adjustable Versions Available currents. On-chip trimming adjusts the output voltage to 1%. Current limit is also trimmed, minimizing the stress on both the regulator and power source circuitry under a T overload conditions. n High Efficiency Linear Regulators The LT1083 series devices are pin compatible with older n Post Regulators for Switching Supplies three-terminal regulators. A 10F output capacitor is n Constant Current Regulators required on these new devices however, this is usually n Battery Chargers included in most regulator designs. DEVICE OUTPUT CURRENT* Unlike PNP regulators, where up to 10% of the output cur- LT1083 7.5 Amps rent is wasted as quiescent current, the LT1083 quiescent LT1084 5.0 Amps current flows into the load, increasing efficiency. LT1085 3.0 Amps L, LT, LTC, LTM, Linear Technology, the Linear logo and OPTI-LOOP are registered trademarks *For a 1.5A low dropout regulator see the LT1086 data sheet. and UltraFast is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical a T 5V, 7.5A Regulator Dropout Voltage vs Output Current 2 V 6.5V LT1083-5 5V AT 7.5A IN + + 22F* 10F TANTALUM LT1083/4/5 TA01 1 *REQUIRED FOR STABILITY 0 0 I /2 I FULLLOAD FULLLOAD OUTPUT CURRENT (A) 1083/4/5 TA02 1083ffe 1 For more information www.linear.com/LT1083 INPUT/OUTPUT VOLTAGE DIFFERENTIAL (V) ion pplica ions pplica ion uresLT1083/LT1084/LT1085 Fixed (Note 1) a Te Maxi Mu M r a T Power Dissipation .............................. Internally Limited Storage Temperature Range ................. 65C to 150C Input Voltage* .......................................................... 30V Lead Temperature (Soldering, 10 sec) .................. 300C Operating Input Voltage *Although the devices maximum operating voltage is limited, (20V for 3.3V, 3.6V Devices ............................................... 20V a 3V, 5V device, and 25V for a 12V device) the devices are guaranteed 5V Devices ........................................................... 20V to withstand transient input voltages up to 30V. For input voltages greater than the maximum operating input voltage some degradation of 12V Devices ......................................................... 25V specifications will occur. For input/output voltage differentials greater than Operating Junction Temperature Range 15V, a minimum external load of 5mA is required to maintain regulation. C-Grades: Control Section .................. 0C to 125C Power Transistor ................ 0C to 150C I-Grades: Control Section .............. 40C to 125C Di T Power Transistor ............ 40C to 150C 100% Thermal Limit Functional Test. M-Grades: (OBSOLETE) Control Section .............. 55C to 150C Power Transistor ............ 55C to 200C o r Der i n F Ma T FRONT VIEW FRONT VIEW TAB IS TAB IS OUTPUT OUTPUT 3 V IN V 3 IN 2 V OUT 2 V OUT 1 GND GND 1 P PACKAGE 3-LEAD TO-3P PLASTIC T PACKAGE = 35C/W JA 3-LEAD PLASTIC TO-220 = 50C/W JA OBSOLETE PACKAGE FRONT VIEW CASE IS V IN OUTPUT 3 V IN 2 TAB IS 2 V OUT OUTPUT 1 1 GND GND M PACKAGE 3-LEAD PLASTIC DD K PACKAGE = 30C/W* 2-LEAD TO-3 METAL CAN JA 2 *WITH PACKAGE SOLDERED TO 0.5IN COPPER AREA OVER = 35C/W JA BACKSIDE GROUND PLANE OR INTERNAL POWER PLANE. CAN VARY JA FROM 20C/W TO >40C/W DEPENDING ON MOUNTING TECHNIQUE OBSOLETE PACKAGE 1083ffe 2 For more information www.linear.com/LT1083 ion or ioning precon ings bsolu