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LTC3589EUJ-TRPBF Datasheet(PDF) 8 Page - Linear Technology |
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LTC3589EUJ-TRPBF Datasheet(HTML) 8 Page - Linear Technology |
8 / 44 page LTC3589 8 3589p Note 1: Stresses beyond those listed Under Absolute Maximum ratings may cause permanent damage to the device. Exposure to any Absolute Maximum rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTC3589 is tested under pulsed load conditions such that TJ ≈ TA. The LTC3589E is guaranteed to meet specifications from 0°C to 85°C junction temperature. Specifications over the –40°C to 125°C operating junction temperature range are assured by design, characterization and correlation with statistical process controls. The LTC3589I is guaranteed over the –40°C to 125°C operating junction temperature range and the LTC3589H is guaranteed over the full –40°C to 150°C operating junction temperature range. High junction temperatures degrade operating lifetimes; operating lifetime is derated for junction temperatures greater than 125°C. The junction temperature (TJ in °C) is calculated from the ambient temperature (TA in °C) and power dissipation (PD, in Watts) according to the formula: TJ = TA + (PD • θJA), where the package junction to ambient thermal impedance θJA = 34°C/W. Note that the maximum ambient temperature consistent with these specifications is determined by specific operating conditions in conjunction with board layout, the rated package thermal impedance and other environmental factors. Note 3: The LTC3589 includes overtemperature protection that is intended to protect the device during momentary overload conditions. Junction temperature will exceed 150°C when overtemperature protection is active. Continuous operation above the specified maximum operating temperature may impair device reliability. Note 4: Dropout voltage is defined as (VIN – VLDO) for LDO1 or (VIN_LDO – VLDO) for other LDOs when VLDO is 3% lower than VLDO measured with VIN = VIN_LDO = 4.3V. Note 5: Dynamic supply current is higher due to the gate charge being delivered at the switching frequency. Note 6: Soft-Start measured in test mode with regulator error amplifier in unity gain mode. ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS Standby IVIN vs VIN LDO2 to LDO4 IDD IVIN vs VIN TA = 25°C, unless otherwise noted. Step-Down Switching Regulator IDD vs VIN Input Supply Current vs Temperature Buck-Boost IDD vs VIN Step-Down Switching Regulator IDD vs VIN VOLTAGE (V) 2.5 14 4.0 22554 G01 8 4 3.0 3.5 4.5 2 0 12 10 6 5.0 5.5 ALL REGULATORS DISABLED VOLTAGE (V) 2.5 4.0 3589 G02 150 50 3.0 3.5 4.5 0 250 200 100 5.0 5.5 ENABLE TWO LDOs ENABLE ONE LDO ENABLE THREE LDOs VOLTAGE (V) 2.5 4.0 3589 G03 400 500 600 200 100 3.0 3.5 4.5 0 900 800 700 300 5.0 5.5 ENABLE TWO BUCKS ENABLE ONE BUCK ENABLE THREE BUCKS PULSE-SKIPPING MODE VOLTAGE (V) 2.5 4.0 3589 G04 80 100 120 40 20 3.0 3.5 4.5 0 60 5.0 5.5 ENABLE TWO BUCKS ENABLE ONE BUCK ENABLE THREE BUCKS Burst Mode OPERATION TEMPERATURE (°C) –50 50 25 3589 G05 800 1000 1200 400 200 –25 0 75 0 600 100 125 150 ALL REGULATORS ENABLED Burst Mode OPERATION STANDBY (ONLY LDO1 ON) ALL REGULATORS ENABLED PULSE-SKIPPING MODE VOLTAGE (V) 2.5 4.5 4.0 3589 G06 350 400 450 150 200 50 100 3.0 3.5 5.0 0 300 250 5.5 Burst Mode OPERATION FORCED CONTINUOUS |
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