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LT3021ES8-1.2 Datasheet(PDF) 4 Page - Linear Technology |
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LT3021ES8-1.2 Datasheet(HTML) 4 Page - Linear Technology |
4 / 16 page 4 LT3021/LT3021-1.2/ LT3021-1.5/LT3021-1.8 3021fa OUTPUT CURRENT (mA) 0 250 225 200 150 175 125 100 75 50 25 0 3021 G01 200 100 300 400 500 TJ = 125°C TJ = 25°C TEMPERATURE ( °C) –50 250 225 200 150 175 125 100 75 50 25 0 3021 G02 25 0 –25 50 75 125 100 IL = 1mA IL = 100mA IL = 250mA IL = 500mA IL = 50mA IL = 10mA VOUT = 1.2V The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are TJ = 25°C. ELECTRICAL CHARACTERISTICS PARAMETER CONDITIONS MIN TYP MAX UNITS Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The LT3021 regulators are tested and specified under pulse load conditions such that TJ ≈ TA. The LT3021 is 100% production tested at TA = 25°C. Performance at –40°C and 125°C is assured by design, characterization and correlation with statistical process controls. Note 3: This IC includes overtemperature protection that is intended to protect the device during momentary overload conditions. Junction temperature will exceed 125 °C when overtemperature protection is active. Continuous operation above the specified maximum operating junction temperature may impair device reliability. Note 4: Maximum junction temperature limits operating conditions. The regulated output voltage specification does not apply for all possible combinations of input voltage and output current. Limit the output current range if operating at maximum input voltage. Limit the input voltage range if operating at maximum output current. Note 5: Typically the LT3021 supplies 500mA output current with a 1V input supply. The guranteed minimum input voltage for 500mA output current is 1.10V. Note 6: The LT3021 is tested and specified for these conditions with an external resistor divider (20k and 30.1k) setting VOUT to 0.5V. The external resistor divider adds 10 µA of output load current. The line regulation and load regulation specifications refer to the change in the 0.2V reference voltage, not the 0.5V output voltage. Specifications for fixed output voltage devices are referred to the output voltage. Note 7: Dropout voltage is the minimum input to output voltage differential needed to maintain regulation at a specified output current. In dropout the output voltage equals: (VIN – VDROPOUT). Note 8: GND pin current is tested with VIN = VOUT(NOMINAL) + 0.4V and a current source load. GND pin current will increase in dropout. See GND pin current curves in the Typical Performance Characteristics section. Note 9: Adjust pin bias current flows out of the ADJ pin. Note 10: Shutdown pin current flows into the SHDN pin. Note 11: Reverse output current is tested with IN grounded and OUT forced to the rated output voltage. This current flows into the OUT pin and out of the GND pin. For fixed voltage devices this includes the current in the output resistor divider. Note 12: The LT3021 is tested and specified for these conditions with an external resistor divider (20k and 100k) setting VOUT to 1.2V. The external resistor divider adds 10 µA of load current. Note 13: Reverse current is higher for the case of (rated_output) < VOUT < VIN, because the no-load recovery circuitry is active in this region and is trying to restore the output voltage to its nominal value. Note 14: Minimum input voltage is the minimum voltage required by the control circuit to regulate the output voltage and supply the full 500mA rated current. This specification is tested at VOUT = 0.5V. At higher output voltages the minimum input voltage required for regulation will be equal to the regulated output voltage VOUT plus the dropout voltage. TYPICAL PERFOR A CE CHARACTERISTICS Dropout Voltage Dropout Voltage Current Limit (Note 12) VIN = 10V, VOUT = 0V 1.8 A VIN = VOUT(NOMINAL) + 0.5V, ∆VOUT = –5% ● 550 mA Input Reverse Leakage Current VIN = –10V, VOUT = 0V 1 20 µA Reverse Output Current LT3021 VOUT = 1.2V, VIN = 0V 0.5 5 µA (Notes 11, 13) LT3021-1.2 VOUT = 1.2V, VIN = 0V 10 15 µA LT3021-1.5 VOUT = 1.5V, VIN = 0V 10 15 µA LT3021-1.8 VOUT = 1.8V, VIN = 0V 10 15 µA TEMPERATURE ( °C) –50 1.2 1.1 1.0 0.9 0.8 0.6 0.7 0.5 0.4 0.3 0.2 3021 G16 25 0 –25 50 75 125 100 IL = 500mA Minimum Input Voltage |
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