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LT1764A Datasheet(PDF) 6 Page - Linear Technology |
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LT1764A Datasheet(HTML) 6 Page - Linear Technology |
6 / 28 page LT1963A Series 6 1963aff For more information www.linear.com/LT1963A elecTrical characTerisTics The l denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 3) PARAMETER CONDITIONS MIN TYP MAX UNITS Ripple Rejection VIN – VOUT = 1.5V (Avg), VRIPPLE = 0.5VP-P, fRIPPLE = 120Hz, ILOAD = 0.75A 55 63 dB Current Limit VIN = 7V, VOUT = 0V VIN = VOUT(NOMINAL) + 1V, ∆VOUT = –0.1V ● 1.6 2 A A Input Reverse Leakage Current (Note 13) Q, T, S8 Packages VIN = –20V, VOUT = 0 ST Package VIN = –20V, VOUT = 0 ● ● 1 2 mA mA Reverse Output Current (Note 11) LT1963A-1.5 VOUT = 1.5V, VIN < 1.5V LT1963A-1.8 VOUT = 1.8V, VIN < 1.8V LT1963A-2.5 VOUT = 2.5V, VIN < 2.5V LT1963A-3.3 VOUT = 3.3V, VIN < 3.3V LT1963A (Note 4) VOUT = 1.21V, VIN < 1.21V 600 600 600 600 300 1200 1200 1200 1200 600 µA µA µA µA µA Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: Absolute maximum input to output differential voltage can not be achieved with all combinations of rated IN pin and OUT pin voltages. With the IN pin at 20V, the OUT pin may not be pulled below 0V. The total measured voltage from IN to OUT can not exceed ±20V. Note 3: The LT1963A regulators are tested and specified under pulse load conditions such that TJ ≈ TA. The LT1963AE is 100% tested at TA = 25°C. Performance at –40°C and 125°C is assured by design, characterization and correlation with statistical process controls. The LT1963AI is guaranteed over the full –40°C to 125°C operating junction temperature range. The LT1963AMP is 100% tested and guaranteed over the –55°C to 125°C operating junction temperature range. Note 4: The LT1963A (adjustable version) is tested and specified for these conditions with the ADJ pin connected to the OUT pin. Note 5: Operating conditions are limited by maximum junction temperature. The regulated output voltage specification will not apply for all possible combinations of input voltage and output current. When operating at maximum input voltage, the output current range must be limited. When operating at maximum output current, the input voltage range must be limited. Note 6: To satisfy requirements for minimum input voltage, the LT1963A (adjustable version) is tested and specified for these conditions with an external resistor divider (two 4.12k resistors) for an output voltage of 2.4V. The external resistor divider will add a 300µA DC load on the output. 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 will be equal to: VIN – VDROPOUT. Note 8: GND pin current is tested with VIN = VOUT(NOMINAL) + 1V and a current source load. The GND pin current will decrease at higher input voltages. Note 9: ADJ pin bias current flows into the ADJ pin. Note 10: SHDN pin current flows into the SHDN pin. Note 11: Reverse output current is tested with the IN pin grounded and the OUT pin forced to the rated output voltage. This current flows into the OUT pin and out the GND pin. Note 12: For the LT1963A, LT1963A-1.5 and LT1963A-1.8 dropout voltage will be limited by the minimum input voltage specification under some output voltage/load conditions. Note 13: For the ST package, the input reverse leakage current increases due to the additional reverse leakage current for the SHDN pin, which is tied internally to the IN pin. |
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