Datasheet LTC3541-2 (Analog Devices) - 6

LTC3541-2
TYPICAL PERFORMANCE CHARACTERISTICS Oscillator Frequency VLDO/Linear Regulator Reference vs Supply Voltage vs Temperature Buck Reference vs Temperature
2.5 0.410 0.820 VIN = 3.6V VIN = 3.6V VIN = 3.6V 0.408 0.816 2.4 0.406 0.812 0.404 0.808 2.3 0.402 0.804 0.400 0.800 2.2 0.398 0.796 REFERENCE (V) REFERENCE (V) FREQUENCY (MHz) 0.396 0.792 2.1 0.394 0.788 0.392 0.784 2.0 0.390 0.780 3 4 5 6 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 SUPPLY VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 35412 G09 35412 G10 35412 G11
Buck (Pulse Skip) Load Step from RDS(0N) vs Temperature Buck (Burst) and VLDO Output 1mA to 500mA
0.700 0.600 LVOUT VOUT 10mV/DIV 100mV/DIV AC COUPLED 0.500 AC COUPLED ) V I ( Ω 0.400 OUT L SYNCH SWITCH 10mV/DIV 500mA/DIV AC COUPLED 0.300 R DS(ON) ILOAD 500mA/DIV 0.200 V 0.100 IN = 2.5V MAIN SWITCH V 2μs/DIV 35412 G13 VIN = 3.6V IN = 3.6V 40μs/DIV 35412 G14 V IN = 3.6V V LVOUT = 1.5V V IN = 5.5V OUT = 1.875V 0 VOUT = 1.875V ILOAD = 1mA TO 500mA –50 –25 0 25 50 75 100 125 ILOAD = 50mA Burst Mode OPERATION TEMPERATURE (°C) 35412 G12
Buck (Burst) Load Step from VLDO Load Step from 1mA to VLDO Load Step from 100mA to 1mA to 500mA 300mA 300mA
VOUT 100mV/DIV AC COUPLED LVOUT LVOUT 20mV/DIV 20mV/DIV AC COUPLED AC COUPLED IL 500mA/DIV I I LOAD ILOAD LOAD 500mA/DIV 250mA/DIV 250mA/DIV 40μs/DIV 35412 G15 VIN = 3.6V 200μs/DIV 35412 G16 VIN = 3.6V 200μs/DIV 35412 G17 VIN = 3.6V VOUT = 1.875V VOUT = 1.5V LVOUT = 1.5V ILOAD = 1mA TO 500mA ILOAD = 1mA TO 300mA ILOAD = 100mA TO 300mA 35412fc 6 For more information www.linear.com/LTC3541-2 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Operation Applications Information Package Description Revision History Related Parts