Datasheet LT3012 (Analog Devices) - 4

LT3012
ELECTRICAL CHARACTERISTICS (LT3012H) The
l
denotes the specifi cations which apply over the –40°C to 140°C operating temperature range, otherwise specifi cations are at TJ = 25°C. PARAMETER CONDITIONS MIN TYP MAX UNITS
Output Voltage Noise COUT = 10μF, ILOAD = 200mA, BW = 10Hz to 100kHz 100 μVRMS ADJ Pin Bias Current (Note 7) 30 100 nA Shutdown Threshold VOUT = Off to On l 1.3 2 V VOUT = On to Off l 0.3 0.8 V SHDN Pin Current (Note 8) VSHDN = 0V 0.3 2 μA VSHDN = 6V 0.1 1 μA Quiescent Current in Shutdown VIN = 6V, VSHDN = 0V 1 5 μA Ripple Rejection VIN = 7V(Avg), VRIPPLE = 0.5VP-P, fRIPPLE = 120Hz, ILOAD = 200mA 65 75 dB Current Limit VIN = 7V, VOUT = 0V 400 mA VIN = 4.75V, ΔVOUT = –0.1V (Note 2) l 200 mA Reverse Output Current (Note 9) VOUT = 1.24V, VIN < 1.24V (Note 2) 12 25 μA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 6:
GND pin current is tested with VIN = 4.75V and a current source may cause permanent damage to the device. Exposure to any Absolute load. This means the device is tested while operating close to its dropout Maximum Rating condition for extended periods may affect device region. This is the worst-case GND pin current. The GND pin current will reliability and lifetime. decrease slightly at higher input voltages.
Note 2:
The LT3012 is tested and specifi ed for these conditions with the
Note 7:
ADJ pin bias current fl ows into the ADJ pin. ADJ pin connected to the OUT pin.
Note 8:
SHDN pin current fl ows out of the SHDN pin.
Note 3:
Operating conditions are limited by maximum junction
Note 9:
Reverse output current is tested with the IN pin grounded and the temperature. The regulated output voltage specifi cation will not apply OUT pin forced to the rated output voltage. This current fl ows into the OUT for all possible combinations of input voltage and output current. When pin and out the GND pin. operating at maximum input voltage, the output current range must be
Note 10:
The LT3012E is guaranteed to meet performance specifi cations limited. When operating at maximum output current, the input voltage from 0°C to 125°C operating junction temperature. Specifi cations over range must be limited. the –40°C to 125°C operating junction temperature range are assured by
Note 4:
To satisfy requirements for minimum input voltage, the LT3012 design, characterization and correlation with statistical process controls. is tested and specifi ed for these conditions with an external resistor The LT3012H is tested to the LT3012H Electrical Characteristics table at divider (249k bottom, 649k top) for an output voltage of 4.5V. The external 140°C operating junction temperature. High junction temperatures degrade resistor divider will add a 5μA DC load on the output. operating lifetimes. Operating lifetime is derated at junction temperatures
Note 5:
Dropout voltage is the minimum input to output voltage differential greater than 125°C. needed to maintain regulation at a specifi ed output current. In dropout, the
Note 11:
This IC includes overtemperature protection that is intended output voltage will be equal to (VIN – VDROPOUT). to protect the device during momentary overload conditions. Junction temperature will exceed 125°C (LT3012E) or 140°C (LT3012H) when overtemperature protection is active. Continuous operation above the specifi ed maximum operating junction temperature may impair device reliability. 3012fd 4