Datasheet LT3088 (Analog Devices) - 3

LT3088
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TJ = 25°C. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
SET Pin Current ISET VIN = 2V, ILOAD = 2mA 49.5 50 50.5 µA 2V ≤ VIN ≤ 36V, 2mA ≤ ILOAD ≤ 800mA l 49 50 51 µA Offset Voltage VOS VIN = 2V, ILOAD = 2mA –1.5 0 1.5 mV (VOUT – VSET) VIN = 2V, ILOAD = 2mA l –3.5 0 3.5 mV ISET Load Regulation ∆ILOAD = 2mA to 800mA –0.1 nA VOS Load Regulation ∆ILOAD = 2mA to 800mA DD Package l –0.5 –3 mV (Note 7) M, ST Packages l –1.5 –4 mV Line Regulation ∆ISET ∆VIN = 2V to 36V, ILOAD = 2mA 1.5 nA/V ∆VOS ∆VIN = 2V to 36V, ILOAD = 2mA 0.001 mV/V Minimum Load Current (Note 3) 2V ≤ VIN ≤ 36V l 0.4 2 mA Dropout Voltage (Note 4) ILOAD = 100mA 1.21 V ILOAD = 800mA l 1.35 1.6 V Current Limit VIN = 5V, VSET = 0V, VOUT = –0.1V l 0.8 1.2 A Reference Current RMS Output Noise (Note 5) 10Hz ≤ f ≤ 100kHz 5.7 nARMS Error Amplifier RMS Output Noise (Note 5) ILOAD = 800mA, 10Hz ≤ f ≤ 100kHz, 27 µVRMS COUT = 0µF, CSET = 0.1µF Ripple Rejection f = 120Hz 75 90 dB VRIPPLE = 0.5VP-P, ILOAD = 0.1A, CSET = 0.1µF, f = 10kHz 75 dB COUT=10µF, VIN = VOUT(NOMINAL) + 3V f = 1MHz 20 dB Thermal Regulation, ISET 10ms Pulse 0.003 %/W
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 4:
For the LT3088, dropout is specified as the minimum input-to- may cause permanent damage to the device. Exposure to any Absolute output voltage differential required supplying a given output current. Maximum Rating condition for extended periods may affect device
Note 5:
Adding a small capacitor across the reference current resistor reliability and lifetime. lowers output noise. Adding this capacitor bypasses the resistor shot
Note 2:
Unless otherwise specified, all voltages are with respect to VOUT. noise and reference current noise; output noise is then equal to error The LT3088 is tested and specified under pulse load conditions such amplifier noise (see Applications Information section). that TJ ≈ TA. The LT3088E is tested at TA = 25°C and performance is
Note 6:
Diodes with series 400Ω resistors clamp the SET pin to the guaranteed from 0°C to 125°C. Performance of the LT3088E over the OUT pin. These diodes and resistors only carry current under transient full –40°C and 125°C operating temperature range is assured by design, overloads. During normal operation, keep the OUT-to-SET differential characterization, and correlation with statistical process controls. The voltage below 2V. LT3088I is guaranteed over the full –40°C to 125°C operating junction
Note 7:
Load regulation is Kelvin sensed at the package. temperature range. The LT3088MP is 100% tested and guaranteed over the –55°C to 150°C operating junction temperature range. The
Note 8:
This IC includes overtemperature protection that protects the LT3088H is tested at 150°C operating junction temperature. High junction device during momentary overload conditions. Junction temperature temperatures degrade operating lifetimes. Operating lifetime is degraded at exceeds the maximum operating junction temperature when junction temperatures greater than 125°C. overtemperature protection is active. Continuous operation above the specified maximum operating junction temperature may impair device
Note 3:
Minimum load current is equivalent to the quiescent current of reliability. the part. Since all quiescent and drive current is delivered to the output of the part, the minimum load current is the minimum current required to maintain regulation. 3088fb For more information www.linear.com/LT3088 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Order Information Typical Performance Characteristics Block Diagram Applications Information Revision History Typical Application Related Parts