LT1763 Series elecTrical characTerisTicsThe l denotes the specifications which apply over the full operatingtemperature range, otherwise specifications are at TA = 25°C. (Note 2)PARAMETERCONDITIONSMINTYPMAXUNITS GND Pin Current ILOAD = 0mA l 30 75 µA VIN = VOUT(NOMINAL) ILOAD = 1mA l 65 120 µA (Notes 5, 7) ILOAD = 50mA l 1.1 1.6 mA ILOAD = 100mA l 2 3 mA ILOAD = 250mA l 5 8 mA ILOAD = 500mA l 11 16 mA Output Voltage Noise COUT = 10µF, CBYP = 0.01µF, ILOAD = 500mA, BW = 10Hz to 100kHz 20 µVRMS ADJ Pin Bias Current (Notes 3, 8) 30 100 nA Shutdown Threshold VOUT = Off to On l 0.8 2 V VOUT = On to Off l 0.25 0.65 V SHDN Pin Current VSHDN = 0V 0.1 µA (Note 9) VSHDN = 20V 1 µA Quiescent Current in Shutdown VIN = 6V, VSHDN = 0V 0.1 1 µA Ripple Rejection VIN – VOUT = 1.5V (Avg), VRIPPLE = 0.5VP-P, fRIPPLE = 120Hz, 50 65 dB ILOAD = 500mA Current Limit VIN = 7V, VOUT = 0V C, I Grade: VIN = VOUT(NOMINAL) + 1V or 2.3V (Note 12), ∆VOUT = –0.1V l 520 mA MP Grade: VIN = 2.35V (Note 12), ∆VOUT = –0.1V l 520 mA Input Reverse Leakage Current VIN = –20V, VOUT = 0V l 1 mA Reverse Output Current LT1763-1.5 VOUT = 1.5V, VIN < 1.5V 10 20 µA (Note 10) LT1763-1.8 VOUT = 1.8V, VIN < 1.8V 10 20 µA LT1763-2.5 VOUT = 2.5V, VIN < 2.5V 10 20 µA LT1763-3 VOUT = 3V, VIN < 3V 10 20 µA LT1763-3.3 VOUT = 3.3V, VIN < 3.3V 10 20 µA LT1763-5 VOUT = 5V, VIN < 5V 10 20 µA LT1763 (Note 3) VOUT = 1.22V, VIN < 1.22V 5 10 µA Note 1: Stresses beyond those listed under Absolute Maximum Ratings Note 6: Dropout voltage is the minimum input to output voltage differential may cause permanent damage to the device. Exposure to any Absolute needed to maintain regulation at a specified output current. In dropout, the Maximum Rating condition for extended periods may affect device output voltage will be equal to: VIN – VDROPOUT. reliability and lifetime. Note 7: GND pin current is tested with VIN = VOUT(NOMINAL) or VIN = 2.3V Note 2: The LT1763 regulators are tested and specified under pulse (C, I grade) or 2.35V (MP grade), whichever is greater, and a current load conditions such that TJ @ TA. The LT1763 (C grade) is 100% tested source load. This means the device is tested while operating in its dropout at TA = 25°C; performance at –40°C and 125°C is assured by design, region. This is the worst-case GND pin current. The GND pin current will characterization and correlation with statistical process controls. The decrease slightly at higher input voltages. LT1763 (I grade) is guaranteed over the full –40°C to 125°C operating Note 8: ADJ pin bias current flows into the ADJ pin. junction temperature range. The LT1763 (MP grade) is 100% tested and Note 9: SHDN pin current flows into the SHDN pin. guaranteed over the –55°C to 125°C operating junction temperature range. Note 10: Reverse output current is tested with the IN pin grounded and the Note 3: The LT1763 (adjustable version) is tested and specified for these OUT pin forced to the rated output voltage. This current flows into the OUT conditions with the ADJ pin connected to the OUT pin. pin and out the GND pin. Note 4: Operating conditions are limited by maximum junction Note 11: For the LT1763, LT1763-1.5 and LT1763-1.8 dropout voltage will temperature. The regulated output voltage specification will not apply be limited by the minimum input voltage specification under some output for all possible combinations of input voltage and output current. When voltage/load conditions. See the curve of Minimum Input Voltage in the operating at maximum input voltage, the output current range must be Typical Performance Characteristics. limited. When operating at maximum output current, the input voltage range must be limited. Note 12: To satisfy requirements for minimum input voltage, current limit is tested at V Note 5: To satisfy requirements for minimum input voltage, the LT1763 IN = VOUT(NOMINAL) + 1V or 2.3V (C, I grade) or 2.35V (MP grade), whichever is greater. (adjustable version) is tested and specified for these conditions with an external resistor divider (two 250k resistors) for an output voltage of 2.44V. The external resistor divider will add a 5µA DC load on the output. 1763fh 5 For more information www.linear.com/LT1763 Document Outline Description Typical Application Absolute Maximum Ratings Typical Performance Characteristics Pin Functions Applications Information Package Description Typical Application Related Parts