LT3080EDD-1 LINER [Linear Technology], LT3080EDD-1 Datasheet
LT3080EDD-1
Available stocks
Related parts for LT3080EDD-1
LT3080EDD-1 Summary of contents
Page 1
FEATURES n Internal Ballast Resistor Permits Direct Connection to Power Plane for Higher Current and Heat Spreading n Output Current: 1.1A n Single Resistor Programs Output Voltage n 1% Initial Accuracy of SET Pin Current n Output Adjustable to 0V ...
Page 2
... LT3080EMS8E-1#PBF LT3080EMS8E-1#TRPBF LEAD BASED FINISH TAPE AND REEL LT3080EDD-1 LT3080EDD-1#TR LT3080EMS8E-1 LT3080EMS8E-1#TR Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. For more information on lead free part marking, go to: For more information on tape and reel specifi cations, go to: ...
Page 3
ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T PARAMETER SET Pin Current I SET Output Offset Voltage (V – OUT SET OS Load Regulation ΔI SET ΔV OS ΔV OS Line Regulation (Note 9) ΔI ...
Page 4
LT3080-1 TYPICAL PERFORMANCE CHARACTERISTICS Set Pin Current 10.20 10.15 10.10 10.05 10.00 9.95 9.90 9.85 9.80 –50 – 100 125 150 TEMPERATURE (°C) 30801 G01 Offset Voltage Distribution N = 13250 – 2 – ...
Page 5
TYPICAL PERFORMANCE CHARACTERISTICS Dropout Voltage (Minimum IN Voltage) 400 350 I = 1.1A LOAD 300 250 I = 500mA LOAD 200 150 100 I = 100mA LOAD –50 – 100 125 TEMPERATURE (°C) 30801 ...
Page 6
LT3080-1 TYPICAL PERFORMANCE CHARACTERISTICS V Pin Current CONTROL 1.1A 20 LOAD DEVICE IN CURRENT LIMIT 1mA LOAD INPUT-TO-OUTPUT DIFFERENTIAL (V) *SEE NOTE 9 IN ELECTRICAL ...
Page 7
TYPICAL PERFORMANCE CHARACTERISTICS Output Voltage Noise V OUT 100μV/DIV TIME 1ms/DIV OUT R = 100k SET C = O.1μF SET C = 10μF OUT I = 1.1A LOAD PIN FUNCTIONS (DD/MS8E) V (Pin 5/Pin 5): This pin ...
Page 8
LT3080-1 BLOCK DIAGRAM APPLICATIONS INFORMATION The LT3080-1 regulator is easy to use and has all the protection features expected in high performance regulators. Included are short-circuit protection and safe operating area protection, as well as thermal shutdown. The LT3080-1 is ...
Page 9
APPLICATIONS INFORMATION IN LT3080-1 V CONTROL + + + V V – IN CONTROL SET R C SET SET Figure 1. Basic Adjustable Regulator dissipation: a higher voltage supply for the control circuitry and a lower voltage supply for the ...
Page 10
LT3080-1 APPLICATIONS INFORMATION Extra consideration must be given to the use of ceramic capacitors. Ceramic capacitors are manufactured with a variety of dielectrics, each with different behavior across temperature and applied voltage. The most common dielectrics used are specifi ed ...
Page 11
APPLICATIONS INFORMATION better than 90 percent equalized sharing of the current. The internal resistance of 25 milliohms (per device) only adds about 25 millivolts of output regulation drop at an output of 2A. At low output voltage, 1V, this adds ...
Page 12
LT3080-1 APPLICATIONS INFORMATION Quieting the Noise The LT3080-1 offers numerous advantages when it comes to dealing with noise. There are several sources of noise in a linear regulator. The most critical noise source for any LDO is the reference; from ...
Page 13
APPLICATIONS INFORMATION Load Regulation Because the LT3080 fl oating device (there is no ground pin on the part, all quiescent and drive current is delivered to the load not possible to provide true remote load sensing. ...
Page 14
LT3080-1 APPLICATIONS INFORMATION give consideration to all sources of thermal resistance from junction to ambient. This includes junction-to-case, case-to-heat sink interface, heat sink resistance or circuit board-to-ambient as the application dictates. Additional heat sources nearby must also be considered. For ...
Page 15
APPLICATIONS INFORMATION Power dissipation under these conditions is equal to: PDRIVE = (V – V )(I CONTROL OUT CONTROL OUT CONTROL (3.630V – 0.9V)(17mA) = 46mW DRIVE ...
Page 16
LT3080-1 APPLICATIONS INFORMATION The second technique for reducing power dissipation, shown in Figure 9, uses a resistor in parallel with the LT3080-1. This resistor provides a parallel path for current fl ow, reducing the current fl owing through the LT3080-1. ...
Page 17
TYPICAL APPLICATIONS OFF V IN 10V Adding Shutdown LT3080 CONTROL + – 25mΩ SET IN LT3080-1 V CONTROL + – 25mΩ SET Q1 VN2222LL R1 SHUTDOWN 30801 TA02 *Q2 INSURES ZERO OUTPUT IN THE ABSENCE ...
Page 18
LT3080-1 TYPICAL APPLICATIONS V IN 10V C1 2.2μ 4.8V TO 28V 18 Using a Lower Value SET Resistor IN LT3080-1 V CONTROL + – 25mΩ OUT SET LT3080 CONTROL + – 25mΩ OUT SET R1 2mA ...
Page 19
TYPICAL APPLICATIONS IN LT3080 13V TO 18V V CONTROL + – SET LT3080 CONTROL + – SET + 15μF 5V 10μF *4mV DROP ENSURES LT3080-1 IS OFF WITH NO-LOAD MULTIPLE LT3080-1’S CAN BE USED IN PARALLEL ...
Page 20
LT3080-1 TYPICAL APPLICATIONS Low Voltage, High Current Adjustable High Effi ciency Regulator 2. † 5.5V + 2× LTC3414 2.2MEG 100k 100μF PGOOD RUN/SS 1000pF SYNC/MODE SGND PGND * DIFFERENTIAL VOLTAGE ON LT3080-1 IS 0.6V SET ...
Page 21
TYPICAL APPLICATIONS CMDSH-4E 4. † 25V LT3493 10μF 1μF 100k SHDN 0.1μF GND *DIFFERENTIAL VOLTAGE ON LT3080-1 ≈ 1.4V SET BY THE TPO610L P-CHANNEL THRESHOLD. † MAXIMUM OUTPUT VOLTAGE IS 2V BELOW INPUT VOLTAGE Adjustable High Effi ...
Page 22
LT3080-1 PACKAGE DESCRIPTION 3.5 ±0.05 1.65 ±0.05 2.15 ±0.05 (2 SIDES) 0.25 ± 0.05 RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS PIN 1 TOP MARK (NOTE 6) 0.200 REF 22 DD Package 8-Lead Plastic DFN (3mm × 3mm) (Reference LTC DWG ...
Page 23
PACKAGE DESCRIPTION 2.794 ± 0.102 (.110 ± .004) 5.23 (.206) MIN 0.42 ± 0.038 (.0165 ± .0015) TYP RECOMMENDED SOLDER PAD LAYOUT 0.254 (.010) GAUGE PLANE 0.18 (.007) NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION ...
Page 24
LT3080-1 TYPICAL APPLICATION V IN 4.8V TO 28V RELATED PARTS PART NUMBER DESCRIPTION LDOs LT1086 1.5A Low Dropout Regulator LT1117 800mA Low Dropout Regulator LT1118 800mA Low Dropout Regulator LT1963A 1.5A Low Noise, Fast Transient Response LDO LT1965 1.1A Low ...