Datasheet LTC3541-1 (Analog Devices) - 6

LTC3541-1
TYPICAL PERFORMANCE CHARACTERISTICS Oscillator Frequency Oscillator Frequency VLDO/Linear Regulator Reference vs Temperature vs Supply Voltage vs Temperature
2.50 2.5 0.410 VIN = 3.6V VIN = 3.6V VIN = 3.6V 2.45 0.408 2.40 2.4 0.406 2.35 0.404 2.30 2.3 0.402 2.25 0.400 2.20 0.398 2.2 REFERENCE (V) FREQUENCY (MHz) 2.15 FREQUENCY (MHz) 0.396 2.10 0.394 2.1 2.05 0.392 2.00 0.390 –50 –25 0 25 50 75 100 125 2.0 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) 3 4 5 6 TEMPERATURE (°C) SUPPLY VOLTAGE (V) 35411 G10 53411 G12 35411 G11
Buck Reference vs Temperature RDS(ON) vs Temperature Buck (Burst) and VLDO Output
0.820 0.700 VIN = 3.6V 0.816 LV 0.600 OUT 0.812 10mV/DIV AC COUPLED 0.808 0.500 0.804 ) VOUT ( Ω 0.400 10mV/DIV 0.800 SYNCH SWITCH AC COUPLED 0.796 0.300 REFERENCE (V) R DS(ON) 0.792 0.200 0.788 VIN = 3.6V 2μs/DIV 35411 G15 0.784 V 0.100 IN = 2.5V MAIN SWITCH V LV IN = 3.6V OUT = 1.5V V 0.780 V OUT = 1.8V IN = 5.5V –50 –25 0 25 50 75 100 125 0 ILOAD = 50mA Burst Mode OPERATION TEMPERATURE (°C) –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) 53411 G13 35411 G14
Buck (Pulse Skip) Load Step from Buck (Burst) Load Step from VLDO Load Step from 1mA to 500mA 1mA to 500mA 1mA to 300mA
VOUT VOUT 100mV/DIV 100mV/DIV AC COUPLED AC COUPLED LVOUT 20mV/DIV AC COUPLED IL IL 500mA/DIV 500mA/DIV ILOAD ILOAD ILOAD 500mA/DIV 500mA/DIV 250mA/DIV VIN = 3.6V 40μs/DIV 35411 G16 VIN = 3.6V 40μs/DIV 35411 G17 VIN = 3.6V 400μs/DIV 35411 G18 VOUT = 1.8V VOUT = 1.8V LVOUT = 1.5V ILOAD = 1mA TO 500mA ILOAD = 1mA TO 500mA ILOAD = 1mA TO 300mA 35411fb 6 For more information www.linear.com/LTC3541-1 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