Datasheet LT1762 (Analog Devices) - 4

LT1762 Series
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
Output Voltage Noise COUT = 10µF, CBYP = 0.01µF, ILOAD = 150mA, 20 µVRMS BW = 10Hz to 100kHz 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 = 1V (Avg), VRIPPLE = 0.5VP-P, 50 65 dB fRIPPLE = 120Hz, ILOAD = 150mA Current Limit VIN = 7V, VOUT = 0V 400 mA VIN = VOUT(NOMINAL) + 1V, ∆VOUT = –0.1V l 160 mA Input Reverse Leakage Current VIN = –20V, VOUT = 0V l 1 mA Reverse Output Current LT1762-2.5 VOUT = 2.5V, VIN < 2.5V 10 20 µA (Note 10) LT1762-3 VOUT = 3V, VIN < 3V 10 20 µA LT1762-3.3 VOUT = 3.3V, VIN < 3.3V 10 20 µA LT1762-5 VOUT = 5V, VIN < 5V 10 20 µA LT1762 (Note 3) VOUT = 1.22V, VIN < 1.22V 5 10 µA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 5:
To satisfy requirements for minimum input voltage, the LT1762 may cause permanent damage to the device. Exposure to any Absolute (adjustable version) is tested and specified for these conditions with an Maximum Rating condition for extended periods may affect device external resistor divider (two 250k resistors) for an output voltage of reliability and lifetime. 2.44V. The external resistor divider will add a 5µA DC load on the output.
Note 2:
The LT1762 regulators are tested and specified under pulse
Note 6:
Dropout voltage is the minimum input to output voltage differential load conditions such that TJ ≈ TA. The LT1762 is 100% tested at 25°C. needed to maintain regulation at a specified output current. In dropout, the Performance at –40°C and 125°C is assured by design, characterization output voltage will be equal to: VIN – VDROPOUT. and correlation with statistical process controls.
Note 7:
GND pin current is tested with VIN = VOUT(NOMINAL) and a current
Note 3:
The LT1762 (adjustable version) is tested and specified for these source load. This means the device is tested while operating in its dropout conditions with the ADJ pin connected to the OUT pin. region. This is the worst-case GND pin current. The GND pin current will
Note 4:
Operating conditions are limited by maximum junction decrease slightly at higher input voltages. temperature. The regulated output voltage specification will not apply
Note 8:
ADJ pin bias current flows into the ADJ pin. for all possible combinations of input voltage and output current. When
Note 9:
SHDN pin current flows into the SHDN pin. operating at maximum input voltage, the output current range must be
Note 10:
Reverse output current is tested with the IN pin grounded and the limited. When operating at maximum output current, the input voltage OUT pin forced to the rated output voltage. This current flows into the OUT range must be limited. pin and out the GND pin. Rev B 4 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Applications Information Package Description Revision History Typical Application Related Parts