Datasheet LT1764A (Analog Devices) - 4

LT1764A Series
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25
°
C. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
Current Limit VIN = 7V, VOUT = 0V 4 A E Grade: LT1764A; LT1764A-1.5; ● 3.1 A VIN = 2.7V, ∆VOUT = – 0.1V MP Grade: LT1764A ● 3.1 A VIN = 2.8V, ∆VOUT = – 0.1V Input Reverse Leakage Current VIN = – 20V, VOUT = 0V ● 1 mA Reverse Output Current (Note 10) LT1764A-1.5 VOUT = 1.5V, VIN < 1.5V 600 1200 µA LT1764A-1.8 VOUT = 1.8V, VIN < 1.8V 600 1200 µA LT1764A-2.5 VOUT = 2.5V, VIN < 2.5V 600 1200 µA LT1764A-3.3 VOUT = 3.3V, VIN < 3.3V 600 1200 µA LT1764A (Note 3) VOUT = 1.21V, VIN < 1.21V 300 600 µA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings 2.42V. The external resistor divider will add a 300µA DC load on the output. may cause permanent damage to the device. Exposure to any Absolute
Note 6:
Dropout voltage is the minimum input to output voltage differential Maximum Rating condition for extended periods may affect device needed to maintain regulation at a specified output current. In dropout, the reliability and lifetime. output voltage will be equal to: VIN – VDROPOUT.
Note 2:
The LT1764A regulators are tested and specified under pulse load
Note 7:
GND pin current is tested with VIN = VOUT(NOMINAL) + 1V or VIN = conditions such that TJ ≈ TA. The LT1764A (E grade) is 100% tested at 2.7V (E grade) or VIN = 2.8V (MP grade), whichever is greater, and a current TA = 25°C; performance at – 40°C and 125°C is assured by design, source load. The GND pin current will decrease at higher input voltages. characterization and correlation with statistical process controls. The
Note 8:
ADJ pin bias current flows into the ADJ pin. LT1764A (MP grade) is 100% tested and guaranteed over the –55°C to 125°C temperature range.
Note 9:
SHDN pin current flows into the SHDN pin.
Note 3:
The LT1764A (adjustable version) is tested and specified for these
Note 10:
Reverse output current is tested with the IN pin grounded and the conditions with the ADJ pin connected to the OUT pin. OUT pin forced to the rated output voltage. This current flows into the OUT
Note 4.
Operating conditions are limited by maximum junction temperature. pin and out the GND pin. The regulated output voltage specification will not apply for all possible
Note 11.
For the LT1764A, LT1764A-1.5 and LT1764A-1.8 dropout voltage combinations of input voltage and output current. When operating at max- will be limited by the minimum input voltage specification under some imum input voltage, the output current range must be limited. When operat- output voltage/load conditions. ing at maximum output current, the input voltage range must be limited.
Note 12.
All combinations of absolute maximum input voltage and
Note 5:
To satisfy requirements for minimum input voltage, the LT1764A absolute maximum output voltage cannot be achieved. The absolute (adjustable version) is tested and specified for these conditions with an maximum differential from input to output is ±20V. For example, with external resistor divider (two 4.12k resistors) for an output voltage of VIN = 20V, VOUT cannot be pulled below ground.
W U TYPICAL PERFOR A CE CHARACTERISTICS Typical Dropout Voltage Guaranteed Dropout Voltage Dropout Voltage
600 700 600 = TEST POINTS 500 600 500 500 400 T 400 J ≤ 125°C TJ = 125°C 400 IL = 3A 300 300 300 IL = 1.5A 200 TJ ≤ 25°C 200 T 200 I DROPOUT VOLTAGE (mV) J = 25°C DROPOUT VOLTAGE (mV) L = 0.5A 100 100 I 100 L = 100mA GUARANTEED DROPOUT VOLTAGE (mV) IL = 1mA 0 0 0 0 0.5 1.0 1.5 2.0 2.5 3.0 0 0.5 1.0 1.5 2.0 2.5 3.0 –50 –25 0 25 50 75 100 125 OUTPUT CURRENT (A) OUTPUT CURRENT (A) TEMPERATURE (°C) 1764 G01 1764 G02 1764 G03 1764afb 4