Datasheet LTC3541-1 (Analog Devices) - 3

LTC3541-1
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 3.6V unless otherwise specified (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IPK Peak Inductor Current VIN = 4.2V (Note 8) 0.8 0.95 1.25 A IBUCKFB BUCKFB Pin Input Current VBUCKFB = 0.9V l ±50 nA ILFB LFB Pin Input Current VLFB = 0.45V l –200 –40 nA VIN Input Voltage Range (Note 4) l 2.7 5.5 V VIN(LINEREG) Buck VIN Line Regulation VIN = 2.7V to 5.5V, ENBUCK = VIN, l 0.04 0.4 %/V ENVLDO = 0V, MODE = VIN (Note 6) VLDO VIN Line Regulation VIN = 2.7V to 5.5V, LVOUT = 1.2V, ENBUCK = VIN, 0.6 mV/V (Referred to LFB) ENVLDO = VIN, IOUT(VLDO) = 100mA, LVIN = 1.5V Linear Regulator VIN Line VIN = 2.7V to 5.5V, LVOUT = 1.2V, ENBUCK = 0V, 0.6 mV/V Regulation (Referred to LFB) ENVLDO = VIN, IOUT(LREG) = 10mA LVIN(LINEREG) LVIN Line Regulation LVIN = 0.9V to 5.5V, VIN = 5.5V, LVOUT = 0.4V, 0.3 mV/V (Referred to LFB) ENBUCK = VIN, ENVLDO = VIN, MODE = VIN, IOUT(VLDO) = 100mA VLDODO LVIN – LVOUT Dropout Voltage LVIN = 1.5V, ENBUCK = VIN, ENVLDO = VIN, 28 60 mV (Note 9) MODE = VIN, IOUT(VLDO) = 50mA, VLFB = 0.3V VLOADREG Buck Output Load Regulation ENBUCK = VIN, ENVLDO = 0V, MODE = VIN (Note 6) 0.5 % VLDO Output Load Regulation IOUT(VLDO) = 1mA – 300mA, LVIN = 1.5V, LVOUT = l 0.25 0.5 % 1.2V, ENBUCK = VIN, ENVLDO = VIN, MODE = VIN Linear Regulator Output Load IOUT(LREG) = 1mA – 30mA, LVOUT = 1.2V, l 0.25 0.5 % ENBUCK = 0V, ENVLDO = VIN VBUCKFB Reference Regulation Voltage ENBUCK = VIN, ENVLDO = 0V, TA = 25°C 0.784 0.8 0.816 V (Note 6) ENBUCK = VIN, ENVLDO = 0V, 0°C ≤ TA ≤ 85°C 0.782 0.8 0.818 V ENBUCK = VIN, ENVLDO = 0V, –40°C ≤ TA ≤ 85°C l 0.78 0.8 0.82 V VLFB Reference Regulation Voltage ENBUCK = 0V, ENVLDO = VIN, TA = 25°C 0.392 0.4 0.408 V (Note 7) ENBUCK = 0V, ENVLDO = VIN, 0°C ≤ TA ≤ 85°C 0.391 0.4 0.409 V ENBUCK = 0V, ENVLDO = VIN, –40°C ≤ TA ≤ 85°C l 0.390 0.4 0.410 V IS Buck + VLDO LVIN = 1.5V, LVOUT = 1.2V, ENBUCK = VIN, 85 μA Burst Mode Sleep ENVLDO = VIN, MODE = 0V, IOUT(VLDO) = 10μA, VIN Quiescent Current VBUCKFB = 0.9V Buck + VLDO LVIN = 1.5V, LVOUT = 1.2V, ENBUCK = VIN, 315 µA Burst Mode Active ENVLDO = VIN, MODE = 0V, IOUT(VLDO) = 10µA, VIN Quiescent Current VBUCKFB = 0.7V Buck + VLDO LVIN = 1.5V, LVOUT = 1.2V, ENBUCK = VIN, 300 µA Pulse-Skip Mode Active ENVLDO = VIN, MODE = VIN, IOUT(VLDO) = 10µA, VIN Quiescent Current VBUCKFB = 0.7V Buck VBUCKFB = 0.9V, IOUT(BUCK) = 0A, ENBUCK = VIN, 55 µA Burst Mode Sleep ENVLDO = 0V, MODE = 0V VIN Quiescent Current Buck VBUCKFB = 0.7V, IOUT(BUCK) = 0A, ENBUCK = VIN, 300 µA Burst Mode Active ENVLDO = 0V, MODE = 0V VIN Quiescent Current Buck VBUCKFB = 0.7V, IOUT(BUCK) = 0A, ENBUCK = VIN, 285 µA Pulse-Skip Mode Active ENVLDO = 0V, MODE = VIN VIN Quiescent Current Linear Regulator VIN Quiescent LVOUT = 1.2V, ENBUCK = 0V, ENVLDO = VIN, 50 µA Current IOUT(LREG) = 10µA VIN Shutdown Quiescent Current ENBUCK = 0V, ENVLDO = 0V 2.5 µA LVIN Shutdown Quiescent Current LVIN = 3.6V, ENBUCK = 0V, ENVLDO = 0V 0.1 µA 35411fb For more information www.linear.com/LTC3541-1 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Related Parts