Datasheet LTC3100 (Analog Devices) - 3

LTC3100
ELECTRICAL CHARACTERISTICS: STEP-UP CONVERTER The
l
denotes the specifications which apply over the full operating temperature range. Extended commercial grade: –40°C to 85°C, VINBST = 1.2V, VBST = 3.3V, TA = 25°C, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
N-Channel MOSFET Switch-On VBST = 3.3V 0.3 Ω Resistance P-Channel MOSFET Switch-On VBST = 3.3V 0.4 Ω Resistance N-Channel MOSFET Current Limit l 700 850 mA Maximum Duty Cycle VFBBST = 1.15V l 85 90 % Minimum Duty Cycle VFBBST = 1.3V l 0 % Switching Frequency l 1.2 1.5 1.8 MHz RUNBST Input High Voltage l 0.9 V RUNBST Input Low Voltage l 0.3 V RUNBST Input Current RUNBST = 1.2V 0.8 2 µA Soft-Start Time 0.8 ms PGBST Threshold, Falling Referenced to Feedback Voltage –8 % PGBST Hysteresis Referenced to Feedback Voltage 3 % PGBST Voltage Low 5mA Load 65 mV PGBST Leakage Current PGBST = 5.5V 0.01 10 µA
ELECTRICAL CHARACTERISTICS: STEP-DOWN CONVERTER The
l
denotes the specifications which apply over the full operating temperature range. Extended commercial grade: –40°C to 85°C, VINBK = 3.3V, TA = 25°C, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Voltage Range l 1.8 5.5 V Output Voltage Adjust Range l 0.61 5.5 V Feedback Voltage l 590 600 610 mV Feedback Input Current FBBK = 600mV 1 30 nA Quiescent Current: Shutdown Measured on VINBK, RUNBK = 0V, VINBST = 0V, VBST = 0V 0.01 1 µA Not Including Switch Leakage Quiescent Current: Active Measured on VINBK (Note 4), RUNBST = 0V 240 350 µA Quiescent Current: Burst Mode Operation Measured on VINBK, FBBK = 620mV, MODE = OPEN, 16 30 µA RUNBST = 0V N-Channel MOSFET Switch Leakage Current VINBK = SWBK = 5V 0.1 5 µA P-Channel MOSFET Switch Leakage Current SWBK = 0V, VINBK = 5V 0.1 5 µA N-Channel MOSFET Switch-On Resistance VINBK = 3.3V 0.45 Ω P-Channel MOSFET Switch-On Resistance VINBK = 3.3V 0.55 Ω P-Channel MOSFET Current Limit l 340 450 mA Maximum Duty Cycle FBBK < 590mV l 100 % Minimum Duty Cycle FBBK > 610mV l 0 % Switching Frequency l 1.2 1.5 1.8 MHz 3100fb For more information www.linear.com/LTC3100 3 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts