Datasheet LTC3549 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | 250mA Low VIN Buck Regulator in 2mm × 3mm DFN |
| Pages / Page | 16 / 4 — TYPICAL PERFOR A CE CHARACTERISTICS |
| File Format / Size | PDF / 370 Kb |
| Document Language | English |
TYPICAL PERFOR A CE CHARACTERISTICS
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LTC3549
W U TYPICAL PERFOR A CE CHARACTERISTICS (From Typical Application on the front page, except for the resistive divider resistor values) Effi ciency/Power Loss vs Load Effi ciency/Power Loss vs Load Effi ciency vs Input Voltage Current, VOUT = 1.5V, Burst Mode Current, VOUT = 1.5V, Pulse Skip VOUT = 1.2V, Burst Mode Operation
100 1 100 1 100 90 90 90 80 80 80 0.1 0.1 70 POWER LOSS (W) 70 POWER LOSS (W) 70 60 60 60 50 0.01 50 0.01 50 40 40 40 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) IOUT: 30 30 30 0.1mA 0.001 0.001 20 20 EFFICIENCY POWER LOSS 20 1mA V V 10mA IN = 1.8V IN = 1.8V 10 10 V V 10 100mA IN = 2.5V IN = 2.5V V V 300mA 0 0.0001 0 IN = 3.1V IN = 3.1V 0.0001 0 0.1 1 10 100 1000 0.1 1 10 100 1000 1.5 2.5 3.5 4.5 5.5 LOAD CURRENT (mA) 3549 G01a LOAD CURRENT (mA) 3549 G01b INPUT VOLTAGE (V) 3549 G02 EFFICIENCY POWER LOSS VIN = 1.8V VIN = 1.8V VIN = 2.5V VIN = 2.5V VIN = 3.1V VIN = 3.1V
Effi ciency vs Input Voltage Effi ciency vs Load Current Effi ciency vs Load Current VOUT = 1.2V, Pulse Skip VOUT = 1.8V, Burst Mode VOUT = 1.8V, Pulse Skip
100 100 1 100 L = 4.7µH L = 4.7µH 90 90 90 80 80 80 0.1 70 70 POWER LOSS (W) 70 60 60 60 50 50 0.01 50 40 40 EFFICIENCY 40 EFFICIENCY (%) EFFICIENCY (%) V EFFICIENCY (%) 30 30 IN = 2.5V 30 VIN = 3.6V 0.001 EFFICIENCY 20 20 VIN = 4.2V 20 VIN = 2.5V 10 10 POWER LOSS 10 VIN = 3.6V VIN = 3.6V VIN = 4.2V 0 0 0.0001 0 1.5 2.5 3.5 4.5 5.5 0.1 1 10 100 1000 0.1 1 10 100 1000 INPUT VOLTAGE (V) LOAD CURRENT (mA) LOAD CURRENT (mA) 3549 G03 IOUT: 3549 G04a 3549 G04b 0.1mA 10mA 300mA 1mA 100mA
Effi ciency vs Load Current Effi ciency vs Load Current Reference Voltage VOUT = 1.2V, Burst Mode VOUT = 1.2V, Pulse Skip vs Temperature
100 100 0.6132 V V IN = 1.6V IN = 1.6V 90 90 V V IN = 2.5V IN = 2.2V V V 80 IN = 3.1V IN = 4.2V 80 70 70 0.6111 60 60 50 50 40 40 EFFICIENCY (%) EFFICIENCY (%) 0.6090 30 30 REFERENCE VOLTAGE (V) 20 20 VIN = 1.6V 10 VIN = 2.5V 10 VIN = 3.1V 0 0 0.6069 0.1 1 10 100 1000 0.1 1 10 100 1000 –50 –25 0 25 50 75 100 125 LOAD CURRENT (mA) LOAD CURRENT (mA) TEMPERATURE (ºC) 3549 G05a 3549 G06 3549 G05b 3549f 4
W U TYPICAL PERFOR A CE CHARACTERISTICS (From Typical Application on the front page, except for the resistive divider resistor values) Effi ciency/Power Loss vs Load Effi ciency/Power Loss vs Load Effi ciency vs Input Voltage Current, VOUT = 1.5V, Burst Mode Current, VOUT = 1.5V, Pulse Skip VOUT = 1.2V, Burst Mode Operation
100 1 100 1 100 90 90 90 80 80 80 0.1 0.1 70 POWER LOSS (W) 70 POWER LOSS (W) 70 60 60 60 50 0.01 50 0.01 50 40 40 40 EFFICIENCY (%) EFFICIENCY (%) EFFICIENCY (%) IOUT: 30 30 30 0.1mA 0.001 0.001 20 20 EFFICIENCY POWER LOSS 20 1mA V V 10mA IN = 1.8V IN = 1.8V 10 10 V V 10 100mA IN = 2.5V IN = 2.5V V V 300mA 0 0.0001 0 IN = 3.1V IN = 3.1V 0.0001 0 0.1 1 10 100 1000 0.1 1 10 100 1000 1.5 2.5 3.5 4.5 5.5 LOAD CURRENT (mA) 3549 G01a LOAD CURRENT (mA) 3549 G01b INPUT VOLTAGE (V) 3549 G02 EFFICIENCY POWER LOSS VIN = 1.8V VIN = 1.8V VIN = 2.5V VIN = 2.5V VIN = 3.1V VIN = 3.1V
Effi ciency vs Input Voltage Effi ciency vs Load Current Effi ciency vs Load Current VOUT = 1.2V, Pulse Skip VOUT = 1.8V, Burst Mode VOUT = 1.8V, Pulse Skip
100 100 1 100 L = 4.7µH L = 4.7µH 90 90 90 80 80 80 0.1 70 70 POWER LOSS (W) 70 60 60 60 50 50 0.01 50 40 40 EFFICIENCY 40 EFFICIENCY (%) EFFICIENCY (%) V EFFICIENCY (%) 30 30 IN = 2.5V 30 VIN = 3.6V 0.001 EFFICIENCY 20 20 VIN = 4.2V 20 VIN = 2.5V 10 10 POWER LOSS 10 VIN = 3.6V VIN = 3.6V VIN = 4.2V 0 0 0.0001 0 1.5 2.5 3.5 4.5 5.5 0.1 1 10 100 1000 0.1 1 10 100 1000 INPUT VOLTAGE (V) LOAD CURRENT (mA) LOAD CURRENT (mA) 3549 G03 IOUT: 3549 G04a 3549 G04b 0.1mA 10mA 300mA 1mA 100mA
Effi ciency vs Load Current Effi ciency vs Load Current Reference Voltage VOUT = 1.2V, Burst Mode VOUT = 1.2V, Pulse Skip vs Temperature
100 100 0.6132 V V IN = 1.6V IN = 1.6V 90 90 V V IN = 2.5V IN = 2.2V V V 80 IN = 3.1V IN = 4.2V 80 70 70 0.6111 60 60 50 50 40 40 EFFICIENCY (%) EFFICIENCY (%) 0.6090 30 30 REFERENCE VOLTAGE (V) 20 20 VIN = 1.6V 10 VIN = 2.5V 10 VIN = 3.1V 0 0 0.6069 0.1 1 10 100 1000 0.1 1 10 100 1000 –50 –25 0 25 50 75 100 125 LOAD CURRENT (mA) LOAD CURRENT (mA) TEMPERATURE (ºC) 3549 G05a 3549 G06 3549 G05b 3549f 4
