Datasheet LT1521, LT1521-3, LT1521-3.3, LT1521-5 (Analog Devices) - 4

LT1521/LT1521-3 LT1521-3.3/LT1521-5
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Reverse Leakage Current VIN = – 20V, VOUT = 0V ● 1.0 mA Reverse Output Current (Note 11) LT1521-3 VOUT = 3V, VIN < 3V, TJ = 25°C 5 10 µA LT1521-3.3 VOUT = 3.3V, VIN < 3.3V, TJ = 25°C 5 10 µA LT1521-5 VOUT = 5V, VIN < 5V, TJ = 25°C 5 10 µA LT1521 (Note 5) VOUT = 3.8V, VIN < 3.75V, TJ = 25°C 5 10 µA
Note 1:
Absolute Maximum Ratings are those values beyond which the life
Note 5:
The LT1521 (adjustable version) is tested and specified with the of a device may be impaired. adjust pin connected to the output pin.
Note 2:
The shutdown pin input voltage rating is required for a low
Note 6:
Dropout voltage is the minimum input/output voltage required to impedance source. Internal protection devices connected to the shutdown maintain regulation at the specified output current. In dropout the output pin will turn on and clamp the pin to approximately 7V or – 0.6V. This voltage will be equal to: (VIN – VDROPOUT) range allows the use of 5V logic devices to drive the pin directly. For high
Note 7:
Ground pin current is tested with VIN = VOUT (nominal) and a impedance sources or logic running on supply voltages greater than 5.5V, current source load. This means the device is tested while operating in its the maximum current driven into the shutdown pin must be limited to less dropout region. This is the worst-case ground pin current. The ground pin than 5mA. current will decrease slightly at higher input voltages.
Note 3:
For junction temperatures greater than 110°C, a minimum load of
Note 8:
Adjust pin bias current flows into the adjust pin. 1mA is recommended. For TJ > 110°C and IOUT < 1mA, output voltage
Note 9:
Shutdown pin current at VSHDN = 0V flows out of the shutdown may increase by 1%. pin.
Note 4:
Operating conditions are limited by maximum junction
Note 10:
Quiescent current in shutdown is equal to the total sum of the temperature. The regulated output voltage specification will not apply for shutdown pin current (2µA) and the ground pin current (4µA). all possible combinations of input voltage and output current. When
Note 11:
Reverse output current is tested with the input pin grounded and operating at maximum input voltage, the output current range must be the output pin forced to the rated output voltage. This current flows into limited. When operating at maximum output current, the input voltage the output pin and out of the ground pin. range must be limited.
W U TYPICAL PERFORMANCE CHARACTERISTICS Guaranteed Dropout Voltage Dropout Voltage Quiescent Current
0.8 0.8 15.0 = TEST POINTS 0.7 0.7 12.5 VSHDN = OPEN T 0.6 I 0.6 J ≤ 125°C LOAD = 300mA µA) 10.0 0.5 0.5 ILOAD = 150mA TJ ≤ 25°C I 0.4 0.4 LOAD = 100mA 7.5 0.3 0.3 V 5.0 SHDN = 0V DROPOUT VOLTAGE (V) DROPOUT VOLTAGE (V) 0.2 0.2 ILOAD = 50mA QUIESCENT CURRENT ( VIN = 6V 2.5 R 0.1 I L = ∞ 0.1 LOAD = 1mA ILOAD = 0 0 0 0 0 50 100 150 200 250 300 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 OUTPUT CURRENT (mA) TEMPERATURE (°C) TEMPERATURE (°C) LT1521 • TPC01 LT1521 • TPC02 LT1521 • TPC03 1521335fb 4