Datasheet LTC3026-1 (Analog Devices) - 3

LTC3026-1
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at TJ = 25°C. (Note 7) VIN = 1.5V, VOUT = 1.2V, VBIAS = 5V, CIN = CBIAS = 1μF, COUT = 10μF (all capacitors ceramic) unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Operating Voltage (Note 2) l 1.14 5.5 V IIN Operating Current IOUT = 100μA, VSHDN = VIN, 1.2V ≤ VIN ≤ 5V l 95 200 μA Shutdown Current VSHDN = 0V, VIN = 3.5V l 0.6 20 μA VBIAS BIAS Operating Voltage (Note 6) VSHDN = VIN l 4.5 5 5.5 V VBIASUVLO BIAS Undervoltage Lockout l 4.0 4.25 4.4 V IBIAS BIAS Operating Current IOUT = 100μA, VSHDN = VIN l 175 275 μA BIAS Shutdown Current VSHDN = 0V 1 5 μA VADJ Regulation Voltage (Note 4) 1mA ≤ IOUT ≤ 1.5A, 1.14V ≤ VIN ≤ 3.5V, VBST = 5V, VOUT = 0.8V 0.397 0.4 0.403 V 1mA ≤ IOUT ≤ 1.5A, 1.14V ≤ VIN ≤ 3.5V, VBST = 5V, VOUT = 0.8V l 0.395 0.4 0.405 V OUT Programming Range l 0.4 2.6 V Dropout Voltage (Note 5) VIN = 1.5V, VADJ = 0.38, IOUT = 1.5A l 100 250 mV IADJ ADJ Input Current VADJ = 0.4V l –100 100 nA IOUT Continuous Output Current VSHDN = VIN l 1.5 A ILIM Output Current Current Limit 3 A en Output Voltage Noise f = 10Hz to 100kHz, IL = 800mA 110 μVRMS VIHSHDN SHDN Input High Voltage 1.14V ≤ VIN ≤ 3.5V l 1.0 V 3.5V ≤ VIN ≤ 5.5V l 1.2 V VILSHDN SHDN Input Low Voltage 1.14V ≤ VIN ≤ 5.5V l 0.4 V IIHSHDN SHDN Input High Current SHDN = VIN –1 1 μA IILSHDN SHDN Input Low Current SHDN = 0V –1 1 μA VOLPG PG Output Low Voltage IPG = 2mA l 0.1 0.4 V IOHPG PG Output High Leakage VPG = 5.5V 0.01 1 μA Current PG Output Threshold (Note 3) PG High to Low –12 –9 –6 % PG Low to High –10 –7 –4 %
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 5:
Dropout voltage is 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. This IC has overtemperature protection that is
Note 6:
To maintain correct regulation intended to protect the device during momentary overload conditions. VOUT ≤ VBIAS – 2.4V Junction temperatures will exceed 125°C when overtemperature is active.
Note 7:
The LTC3026-1 is tested under pulsed load conditions such Continuous operation above the specified maximum operating junction that T temperature may impair device reliability. J ≈ TA. The LTC3026E-1 is guaranteed to meet specifications from 0°C to 125°C junction temperature. Specifications over the –40°C to
Note 2:
Minimum Operating Voltage required for regulation is: 125°C operating junction temperature range are assured by design, VIN ≥ VOUT(MIN) + VDROPOUT characterization and correlation with statistical process controls. The
Note 3:
PG threshold expressed as a percentage difference from the LTC3026I-1 is guaranteed over the –40°C to 125°C operating junction “VADJ Regulation Voltage” as given in the table. temperature range. Note that the maximum ambient temperature
Note 4:
Operating conditions are limited by maximum junction consistent with these specifications is determined by specific operating temperature. The regulated output voltage specification will not apply conditions in conjunction with board layout, the rated package thermal for all possible combinations of input voltage and output current. When impedance and other environmental factors. The junction temperature operating at maximum input voltage, the output current range must be (TJ, in °C) is calculated from the ambient temperature (TA, in °C) and limited. When operating at maximum output current, the input voltage power dissipation (PD, in Watts) according to the formula: range must be limited. TJ = TA + (PD • θJA), where θJA (in °C/W) is the package thermal impedance. 30261f 3