Datasheet LTC3541 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | High Efficiency Buck + VLDO Regulator |
| Pages / Page | 22 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency vs Input Voltage for. … |
| File Format / Size | PDF / 600 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency vs Input Voltage for. Efficiency vs Load Current for. Buck (Burst)
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LTC3541
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency vs Input Voltage for Efficiency vs Input Voltage for Efficiency vs Load Current for Buck (Burst) Buck (Pulse Skip) Buck (Burst)
100 100 100 VOUT = 1.8V VOUT = 1.8V 95 95 90 VIN = 2.7V 90 IOUT = 500mA 90 IOUT = 500mA 80 VIN = 4.2V 85 85 70 VIN = 3.6V IOUT = 100mA 80 IOUT = 30mA 80 60 75 75 50 IOUT = 100mA 70 70 40 EFFICIENCY (%) EFFICIENCY (%) IOUT = 30mA EFFICIENCY (%) 65 65 30 60 60 20 55 55 10 V 50 50 0 OUT = 1.8V 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) 3541 G01 3541 G02 3541 G03
Efficiency vs Load Current for Efficiency vs Load Current for Efficiency vs Load Current for Buck (Pulse Skip) Buck (Burst) Buck (Pulse Skip)
100 100 100 VOUT = 1.8V V VOUT = 2.5V 90 V IN = 2.7V IN = 2.7V 90 90 V V 80 V IN = 4.2V IN = 3.6V 80 IN = 2.7V V 80 V IN = 3.6V VIN = 3.6V V 70 IN = 4.2V 70 70 IN = 4.2V 60 60 60 50 50 50 40 40 40 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 30 30 30 20 20 20 10 10 10 V 0 0 OUT = 2.5V 0 0.1 1 10 100 1000 0.1 1 10 100 1000 0.1 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3541 G04 3541 G05 3541 G06
VLDO Dropout Voltage vs Buck (Burst) Plus VLDO Bias Output (Auto Start-Up Sequence, Load Current Current vs VLDO Load Current Buck in Pulse Skip) vs Time
100 250 VOUT = 1.5V VIN = 3.6V V I IN = 3V LOAD(BUCK) = 0 80 200 IBIAS = IVIN + ILVIN – ILOAD VOUT VIN = 3.6V 2V/DIV µA) LVOUT 60 150 2V/DIV VIN = 4.2V VIN 40 100 2V/DIV BIAS CURRENT ( DROPOUT VOLTAGE (mV) 20 50 IVOUT = 300mA 2ms/DIV 3541 G09 ILVOUT = 200mA 0 0 0 50 100 150 200 250 300 0.1 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA) 3541 G07 3541 G08 3541fb For more information www.linear.com/LTC3541 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 BUCK Regulator VLDO/Linear regulator Applications Information Efficiency Considerations Thermal Considerations Applications Information Pc Board Layout Checklist Design Example Typical Applications Package Description Revision History Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency vs Input Voltage for Efficiency vs Input Voltage for Efficiency vs Load Current for Buck (Burst) Buck (Pulse Skip) Buck (Burst)
100 100 100 VOUT = 1.8V VOUT = 1.8V 95 95 90 VIN = 2.7V 90 IOUT = 500mA 90 IOUT = 500mA 80 VIN = 4.2V 85 85 70 VIN = 3.6V IOUT = 100mA 80 IOUT = 30mA 80 60 75 75 50 IOUT = 100mA 70 70 40 EFFICIENCY (%) EFFICIENCY (%) IOUT = 30mA EFFICIENCY (%) 65 65 30 60 60 20 55 55 10 V 50 50 0 OUT = 1.8V 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) 3541 G01 3541 G02 3541 G03
Efficiency vs Load Current for Efficiency vs Load Current for Efficiency vs Load Current for Buck (Pulse Skip) Buck (Burst) Buck (Pulse Skip)
100 100 100 VOUT = 1.8V V VOUT = 2.5V 90 V IN = 2.7V IN = 2.7V 90 90 V V 80 V IN = 4.2V IN = 3.6V 80 IN = 2.7V V 80 V IN = 3.6V VIN = 3.6V V 70 IN = 4.2V 70 70 IN = 4.2V 60 60 60 50 50 50 40 40 40 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) 30 30 30 20 20 20 10 10 10 V 0 0 OUT = 2.5V 0 0.1 1 10 100 1000 0.1 1 10 100 1000 0.1 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3541 G04 3541 G05 3541 G06
VLDO Dropout Voltage vs Buck (Burst) Plus VLDO Bias Output (Auto Start-Up Sequence, Load Current Current vs VLDO Load Current Buck in Pulse Skip) vs Time
100 250 VOUT = 1.5V VIN = 3.6V V I IN = 3V LOAD(BUCK) = 0 80 200 IBIAS = IVIN + ILVIN – ILOAD VOUT VIN = 3.6V 2V/DIV µA) LVOUT 60 150 2V/DIV VIN = 4.2V VIN 40 100 2V/DIV BIAS CURRENT ( DROPOUT VOLTAGE (mV) 20 50 IVOUT = 300mA 2ms/DIV 3541 G09 ILVOUT = 200mA 0 0 0 50 100 150 200 250 300 0.1 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA) 3541 G07 3541 G08 3541fb For more information www.linear.com/LTC3541 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 BUCK Regulator VLDO/Linear regulator Applications Information Efficiency Considerations Thermal Considerations Applications Information Pc Board Layout Checklist Design Example Typical Applications Package Description Revision History Related Parts
