LT3080-1 elecTrical characTerisTics The l denotes the specifications which apply over the full operatingtemperature range, otherwise specifications are at TA = 25°C.PARAMETERCONDITIONSMINTYPMAX UNITS SET Pin Current ISET VIN = 1V, VCONTROL = 2.0V, ILOAD = 1mA, TJ = 25°C 9.90 10 10.10 µA VIN ≥ 1V, VCONTROL ≥ 2.0V, 1mA ≤ ILOAD ≤ 1.1A (Note 9) l 9.80 10 10.20 µA Output Offset Voltage (VOUT – VSET) VOS VIN = 1V, VCONTROL = 2V, IOUT = 1mA –2 2 mV l –3.5 3.5 mV Load Regulation ∆ISET ∆ILOAD = 1mA to 1.1A –0.1 nA ∆VOS ∆ILOAD = 1mA to 1.1A (Note 8) 27.5 34 mV ∆VOS ∆ILOAD = 1mA to 1.1A (Note 8) l 48 mV Line Regulation (Note 9) ∆ISET VIN = 1V to 22V, VCONTROL=1V to 22V, ILOAD=1mA l 0.1 0.5 nA/V ∆VOS VIN = 1V to 22V, VCONTROL=1V to 22V, ILOAD=1mA 0.003 mV/V Minimum Load Current (Notes 3, 9) VIN = VCONTROL = 10V l 300 500 µA VIN = VCONTROL = 22V l 1 mA VCONTROL Dropout Voltage (Note 4) ILOAD = 100mA 1.2 V ILOAD = 1.1A l 1.35 1.6 V VIN Dropout Voltage (Note 4) ILOAD = 100mA l 100 200 mV ILOAD = 1.1A l 350 500 mV CONTROL Pin Current (Note 5) ILOAD = 100mA l 4 6 mA ILOAD = 1.1A l 17 30 mA Current Limit (Note 9) VIN = 5V, VCONTROL = 5V, VSET = 0V, VOUT = –0.1V l 1.1 1.4 A Error Amplifier RMS Output Noise (Note 6) ILOAD = 1.1A, 10Hz ≤ f ≤ 100kHz, COUT = 10µF, CSET = 0.1µF 40 µVRMS Reference Current RMS Output Noise (Note 6) 10Hz ≤ f ≤ 100kHz 1 nARMS Ripple Rejection f = 120Hz, VRIPPLE = 0.5VP-P, ILOAD = 0.2A, CSET = 0.1µF, COUT = 2.2µF 75 dB f = 10kHz 55 dB f = 1MHz 20 dB Thermal Regulation, ISET 10ms Pulse 0.003 %/W Note 1: Stresses beyond those listed under Absolute Maximum Ratings Note 6: Output noise is lowered by adding a small capacitor across the may cause permanent damage to the device. Exposure to any Absolute voltage setting resistor. Adding this capacitor bypasses the voltage setting Maximum Rating condition for extended periods may affect device resistor shot noise and reference current noise; output noise is then equal reliability and lifetime. to error amplifier noise (see the Applications Information section). Note 2: Unless otherwise specified, all voltages are with respect to VOUT. Note 7: SET pin is clamped to the output with diodes. These diodes only The LT3080-1 is tested and specified under pulse load conditions such carry current under transient overloads. that TJ ≅ TA. The LT3080E-1 is tested at TA = 25°C. Performance of the Note 8: Load regulation is Kelvin sensed at the package. LT3080E-1 over the full –40°C and 125°C operating temperature range Note 9: Current limit may decrease to zero at input-to-output differential is assured by design, characterization, and correlation with statistical voltages (V process controls. The LT3080I-1 is guaranteed over the full –40°C to IN – VOUT) greater than 22V. Operation at voltages for both IN and V 125°C operating junction temperature range. CONTROL is allowed up to a maximum of 36V as long as the difference between input and output voltage is below the specified differential Note 3: Minimum load current is equivalent to the quiescent current of (VIN – VOUT) voltage. Line and load regulation specifications are not the part. Since all quiescent and drive current is delivered to the output applicable when the device is in current limit. of the part, the minimum load current is the minimum current required to Note 10: This IC includes over-temperature protection that is intended maintain regulation. to protect the device during momentary overload conditions. Junction Note 4: For the LT3080-1, dropout is caused by either minimum control temperature will exceed the maximum operating junction temperature voltage (VCONTROL) or minimum input voltage (VIN). Both parameters are when over-temperature protection is active. Continuous operation above specified with respect to the output voltage. The specifications represent the the specified maximum operating junction temperature may impair device minimum input-to-output differential voltage required to maintain regulation. reliability. Note 5: The CONTROL pin current is the drive current required for the output transistor. This current will track output current with roughly a 1:60 ratio. The minimum value is equal to the quiescent current of the device. 30801fc For more information www.linear.com/LT3080-1 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
