Datasheet LT1529, LT1529-3.3, LT1529-5 (Analog Devices) - 3

LT1529 LT1529-3.3/LT1529-5
ELECTRICAL CH C ARA TERISTICS The
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denotes specifications which apply over the operating temperature range, otherwise specificatons are at TA = 25
°
C. (Note 3) PARAMETER CONDITIONS MIN TYP MAX UNITS
Dropout Voltage ILOAD = 700mA, TJ = 25°C 320 430 mV (Note 6) ILOAD = 700mA ● 550 mV ILOAD = 1.5A, TJ = 25°C 430 550 mV ILOAD = 1.5A ● 700 mV ILOAD = 3A, TJ = 25°C 600 750 mV ILOAD = 3A ● 950 mV GND Pin Current ILOAD = 0mA, TJ = 25°C 50 100 µA (Note 7) ILOAD = 0mA, TJ = 125°C (Note 8) 400 µA ILOAD = 100mA, TJ = 25°C 0.6 1.0 mA ILOAD = 100mA, TJ = 125°C (Note 8) 1.0 mA ILOAD = 700mA ● 5.5 12 mA ILOAD = 1.5A ● 20 40 mA ILOAD = 3A ● 80 160 mA ADJ Pin Bias Current (Notes 5, 9) TJ = 25°C 150 300 nA Shutdown Threshold VOUT = Off to On ● 1.20 2.8 V VOUT = On to Off ● 0.25 0.75 V SHDN Pin Current (Note 10) VSHDN = 0V ● 4.5 10 µA Quiescent Current in Shutdown VIN = VOUT (Nominal) + 1V, VSHDN = 0V ● 15 30 µA (Note 11) Ripple Rejection VIN – VOUT = 1V (Avg), VRIPPLE = 0.5VP-P, 50 62 dB fRIPPLE = 120Hz, ILOAD = 1.5A Current Limit VIN – VOUT = 7V, TJ = 25°C 5 A VIN = VOUT (Nominal) + 1.5V, ∆VOUT = – 0.1V ● 3.2 4.7 A Input Reverse Leakage Current VIN = – 15V, VOUT = 0V ● 1.0 mA Reverse Output Current (Note 12) LT1529-3.3 VOUT = 3.3V, VIN = 0V 16 µA LT1529-5 VOUT = 5V, VIN = 0V 16 µA LT1529 (Note 6) VOUT = 3.8V, VIN = 0V 16 µA
Note 1:
Absolute Maximum Ratings are those values beyond which the life
Note 7:
GND pin current is tested with VIN = VOUT (nominal) and a current of a device may be impaired. source load. This means that the device is tested while operating in its
Note 2:
The SHDN pin input voltage rating is required for a low impedance dropout region. This is the worst-case GND pin current. The GND pin source. Internal protection devices connected to the SHDN pin will turn on current will decrease slightly at higher input voltages. and clamp the pin to approximately 7V or – 0.6V. This range allows the use
Note 8:
GND pin current will rise at TJ > 75°C. This is due to internal of 5V logic devices to drive the pin directly. For high impedance sources or circuitry designed to compensate for leakage currents in the output logic running on supply voltages greater than 5.5V, the maximum current transistor at high temperatures. This allows quiescent current to be driven into the SHDN pin must be limited to less than 5mA. minimized at lower temperatures, yet maintain output regulation at high
Note 3:
The device is tested under pulse load conditions such that T temperatures with light loads. See quiescent current curve in typical J = TA.
Note 4:
Operating conditions are limited by maximum junction performance characteristics. temperature. The regulated output voltage specification will not apply for
Note 9:
ADJ pin bias current flows into the ADJ pin. all possible combinations of input voltage and output current. When
Note 10:
SHDN pin current at VSHDN = 0V flows out of the SHDN pin. operating at maximum input voltage, the output current range must be
Note 11:
Quiescent current in shutdown is equal to the sum total of the limited. When operating at maximum output current the input voltage SHDN pin current (5µA) and the GND pin current (10µA). range must be limited.
Note 12:
Reverse output current is tested with the VIN pin grounded and
Note 5:
The LT1529 is tested and specified with the ADJ pin connected to the OUTPUT pin forced to the rated output voltage. This current flows into the OUTPUT pin. the OUTPUT pin and out of the GND pin.
Note 6:
Dropout voltage is the minimum input/output voltage required to maintain regulation at the specified output current. In dropout the output voltage will be equal to (VIN – VDROPOUT). 152935fb 3