Datasheet LT3080 (Analog Devices) - 4

LT3080
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 11) PARAMETER CONDITIONS MIN TYP MAX 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 DFN and MSOP Package –2 2 mV VIN = 1V, VCONTROL = 2V, IOUT = 1mA l –3.5 3.5 mV SOT-223, DD-Pak and T0-220 Package –5 5 mV l –6 6 mV Load Regulation ΔISET ΔILOAD = 1mA to 1.1A –0.1 nA ΔVOS ΔILOAD = 1mA to 1.1A (Note 8) l 0.6 1.3 mV Line Regulation (Note 9) ΔISET VIN = 1V to 25V, VCONTROL = 2V to 25V, ILOAD = 1mA l 0.1 0.5 nA/V DFN and MSOP Package ΔVOS VIN = 1V to 25V, VCONTROL = 2V to 25V, ILOAD = 1mA 0.003 mV/V Line Regulation (Note 9) ΔISET VIN = 1V to 26V, VCONTROL = 2V to 26V, ILOAD = 1mA l 0.1 0.5 nA/V SOT-223, DD-Pak and T0-220 Package ΔVOS VIN = 1V to 26V, VCONTROL = 2V to 26V, ILOAD = 1mA 0.003 mV/V Minimum Load Current (Notes 3, 9) VIN = VCONTROL = 10V l 300 500 µA VIN = VCONTROL = 25V (DFN and MSOP Package) l 1 mA VIN = VCONTROL = 26V (SOT-223, DD-Pak and T0-220 Package) 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 VCONTROL Pin Current ILOAD = 100mA l 4 6 mA ILOAD = 1.1A l 17 30 mA Current Limit 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 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 is tested and specified under pulse load conditions such that carry current under transient overloads. TJ ≅ TA. The LT3080E is tested at TA = 25°C. Performance of the LT3080E
Note 8:
Load regulation is Kelvin sensed at the package. over the full –40°C and 125°C operating temperature range is assured by
Note 9:
Current limit may decrease to zero at input-to-output differential design, characterization, and correlation with statistical process controls. voltages (V The LT3080I is guaranteed over the full –40°C to 125°C operating junction IN–VOUT) greater than 25V (DFN and MSOP package) or 26V (SOT-223, DD-Pak and T0-220 Package). Operation at voltages for both IN temperature range. and VCONTROL is allowed up to a maximum of 36V as long as the difference
Note 3:
Minimum load current is equivalent to the quiescent current of between input and output voltage is below the specified differential the part. Since all quiescent and drive current is delivered to the output (VIN–VOUT) voltage. Line and load regulation specifications are not of the part, the minimum load current is the minimum current required to applicable when the device is in current limit. maintain regulation.
Note 10:
This IC includes overtemperature protection that is intended
Note 4:
For the LT3080, dropout is caused by either minimum control to protect the device during momentary overload conditions. Junction voltage (VCONTROL) or minimum input voltage (VIN). Both parameters are temperature will exceed the maximum operating junction temperature when specified with respect to the output voltage. The specifications represent the overtemperature protection is active. Continuous operation above the specified minimum input-to-output differential voltage required to maintain regulation. maximum operating junction temperature may impair device reliability.
Note 5:
The VCONTROL pin current is the drive current required for the
Note 11:
The SOT-223 package connects the IN and VCONTROL pins output transistor. This current will track output current with roughly a 1:60 together internally. Therefore, test conditions for this pin follow the ratio. The minimum value is equal to the quiescent current of the device. VCONTROL conditions listed in the Electrical Characteristics Table. 3080fc 4 Document Outline Features Applications Description Typical Application 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