Datasheet LTC3541-3 (Analog Devices) - 5

LTC3541-3
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency vs Input Voltage for Efficiency vs Input Voltage for Efficiency vs Load Current for Buck (Pulse Skip) Buck (Burst) Buck (Pulse Skip)
95 100 100 V 90 95 90 IN = 2.7V IOUT = 500mA V 85 90 I 80 IN = 3.6V OUT = 500mA 85 70 V 80 IN = 4.2V IOUT = 100mA 80 60 75 I I OUT = 100mA OUT = 30mA 75 50 70 70 40 EFFICIENCY (%) IOUT = 30mA 65 EFFICIENCY (%) EFFICIENCY (%) 65 30 60 60 20 55 55 10 50 50 0 2 3 4 5 6 2 3 4 5 6 0.1 1 10 100 1000 INPUT VOLTAGE (V) INPUT VOLTAGE (V) LOAD CURRENT (mA) 35413 G01 35413 G02 35413 G03
Efficiency vs Load Current for VLDO Dropout Voltage Buck (Burst) Plus VLDO Bias Buck (Burst) vs Load Current Current vs VLDO Load Current
100 100 250 VIN = 2.7V VIN = 3.6V 90 VIN = 3.6V ILOAD_BUCK = 0 80 I 80 V 200 BIAS = IVIN + ILVIN – ILOAD V IN = 3V IN = 4.2V 70 VIN = 3.6V 60 60 150 50 VIN = 4.2V 40 40 100 EFFICIENCY (%) 30 BIAS CURRENT (μA) DROPOUT VOLTAGE (mV) 20 20 50 10 0 0 0 0.1 1 10 100 1000 0 50 100 150 200 250 300 0.1 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 35413 G04 35413 G05 35413 G06
Output (Auto-Start-Up Sequence) Oscillator Frequency Oscillator Frequency vs Time vs Temperature vs Supply Voltage
2.50 2.5 VIN = 3.6V VIN = 3.6V 2.45 VOUT 1V/DIV 2.40 2.4 2.35 LVOUT 1V/DIV 2.30 2.3 2.25 VIN 2V/DIV 2.20 2.2 FREQUENCY (MHz) 2.15 FREQUENCY (MHz) 2.10 2.1 2ms/DIV 35413 G07 IVOUT = 200mA ILVOUT = 30mA 2.05 2.00 2.0 –50 –25 0 25 50 75 100 125 3 4 5 6 TEMPERATURE (°C) SUPPLY VOLTAGE (V) 35413 G08 35413 G09 35413fd For more information www.linear.com/LTC3541-3 5 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