Datasheet LT3021, LT3021-1.2, LT3021-1.5, LT3021-1.8 (Analog Devices) - 5

LT3021/LT3021-1.2/ LT3021-1.5/LT3021-1.8
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TJ = 25°C. Note 1:
Stresses beyond those listed under Absolute Maximum Ratings voltage, not the 0.5V output voltage. Specifications for fixed output voltage may cause permanent damage to the device. Exposure to any Absolute devices are referred to the output voltage. Maximum Rating condition for extended periods may affect device
Note 7:
Dropout voltage is the minimum input to output voltage differential reliability and lifetime. needed to maintain regulation at a specified output current. In dropout the
Note 2:
The LT3021 regulators are tested and specified under pulse load output voltage equals: (VIN – VDROPOUT). conditions such that TJ ≈ TA. The LT3021E regulators are 100% tested
Note 8:
GND pin current is tested with V at T IN = VOUT(NOMINAL) + 0.4V and a A = 25°C. Performance at –40°C and 125°C is assured by design, current source load. GND pin current will increase in dropout. See GND pin characterization and correlation with statistical process controls. The current curves in the Typical Performance Characteristics section. LT3021I regulators are guaranteed over the full –40ºC to 125ºC operating
Note 9:
Adjust pin bias current flows out of the ADJ pin. junction temperature range.
Note 10:
Shutdown pin current flows into the SHDN pin.
Note 3:
This IC includes overtemperature protection that is intended to protect the device during momentary overload conditions. Junction
Note 11:
Reverse output current is tested with IN grounded and OUT temperature will exceed 125°C when overtemperature protection is active. forced to the rated output voltage. This current flows into the OUT pin and Continuous operation above the specified maximum operating junction out of the GND pin. For fixed voltage devices this includes the current in temperature may impair device reliability. the output resistor divider.
Note 4:
Maximum junction temperature limits operating conditions. The
Note 12:
The LT3021 is tested and specified for these conditions with an regulated output voltage specification does not apply for all possible external resistor divider (20k and 100k) setting VOUT to 1.2V. The external combinations of input voltage and output current. Limit the output current resistor divider adds 10µA of load current. range if operating at maximum input voltage. Limit the input voltage range
Note 13:
Reverse current is higher for the case of (rated_output) < VOUT if operating at maximum output current. < VIN, because the no-load recovery circuitry is active in this region and is
Note 5:
Typically the LT3021 supplies 500mA output current with a 1V trying to restore the output voltage to its nominal value. input supply. The guranteed minimum input voltage for 500mA output
Note 14:
Minimum input voltage is the minimum voltage required by the current is 1.10V. control circuit to regulate the output voltage and supply the full 500mA
Note 6:
The LT3021 is tested and specified for these conditions with an rated current. This specification is tested at VOUT = 0.5V. At higher output external resistor divider (20k and 30.1k) setting V voltages the minimum input voltage required for regulation will be equal to OUT to 0.5V. The external resistor divider adds 10µA of output load current. The line regulation and the regulated output voltage VOUT plus the dropout voltage. load regulation specifications refer to the change in the 0.2V reference
TYPICAL PERFORMANCE CHARACTERISTICS Dropout Voltage Dropout Voltage Minimum Input Voltage
250 250 1.2 VOUT = 1.2V I I L = 500mA L = 500mA 225 225 1.1 TJ = 125°C 200 200 1.0 175 175 IL = 250mA 0.9 TAGE (V) 150 150 0.8 TAGE (mV) TAGE (mV) 125 125 IL = 100mA 0.7 TJ = 25°C 100 100 0.6 75 75 IL = 50mA 0.5 DROPOUT VOL DROPOUT VOL 50 50 IL = 10mA MINIMUM INPUT VOL 0.4 25 25 I 0.3 L = 1mA 0 0 0.2 0 100 200 300 400 500 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 OUTPUT CURRENT (mA) TEMPERATURE (°C) TEMPERATURE (°C) 3021 G01 3021 G02 3021 G16 Rev.D For more information www.analog.com 5 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Typical Performance Characteristics Pin Functions Applications Information Package Description