Datasheet LTC3447 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | I2C Controllable Buck Regulator in 3mm × 3mm DFN |
| Pages / Page | 16 / 4 — TYPICAL PERFOR A CE CHARACTERISTICS. Effi ciency and Power Loss vs. … |
| File Format / Size | PDF / 578 Kb |
| Document Language | English |
TYPICAL PERFOR A CE CHARACTERISTICS. Effi ciency and Power Loss vs. EffIciency and Power Loss vs. DAC Nonlinearity
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LTC3447
W U TYPICAL PERFOR A CE CHARACTERISTICS Effi ciency and Power Loss vs EffIciency and Power Loss vs DAC Nonlinearity Load Current (V Load Current (V IN = 5.5V) IN = 3.6V)
0.5 100 1000 100 1000 0.4 90 V 90 V OUTMAX OUTMAX 0.3 80 80 VOUTMIN POWER LOSS (mW) 0.2 POWER LOSS (mW) INL 70 70 100 100 0.1 VOUTMIN 60 60 0 50 50 LOSSMAX – 0.1 DNL ERROR (LSB) 40 40 EFFICIENCY (%) LOSSMAX 10 EFFICIENCY (%) 10 – 0.2 30 30 LOSSMIN – 0.3 20 LOSSMIN 20 – 0.4 10 10 – 0.5 0 1 0 1 0 10 20 30 40 50 60 1 10 100 1000 1 10 100 1000 DAC LOAD CURRENT (mA) LOAD CURRENT (mA) 3447 G04 3447 GO1 3447 G02
EffIciency and Power Loss vs Load Current (VIN = 2.5V) Output Voltage vs Load Current Bias Current vs Supply Voltage
100 1000 2.10 0.80 350 90 VOUTMAX 300 80 2.05 0.75 V POWER LOSS (mW) DAC = MAX V PULSE SKIP OUTMIN IN = 3.6V 250 70 100 V µA) V OUTMIN 60 (V) IN = 2.5V 200 50 2.00 0.70 DAC = MIN V LOSS IN = 3.6V (V) MAX 150 OUTMAX 40 V V EFFICIENCY (%) IN = 2.5V 10 30 LOSSMIN BIAS CURRENT ( 100 1.95 0.65 20 50 10 BURST 0 1 1.90 0.60 0 1 10 100 1000 0 200 400 600 800 1000 2.5 3.5 4.5 5.5 LOAD CURRENT (mA) LOAD CURRENT (mA) SUPPLY VOLTAGE (V) 3447 G03 3447 G05 3447 G06
Bias Current and Shutdown Frequency vs Supply Voltage Frequency vs Temperature Current vs Temperature
1.12 1.30 3.0 BIAS CURRENT 1.10 1.24 360 V 2.5 1.08 1.18 IN = 5.5V SHUTDOWN CURRENT ( VIN = 3.6V 1.06 1.12 2.0 VIN = 2.5V 1.04 1.06 310 1.02 1.00 1.5 1.00 0.94 260 SHUTDOWN CURRENT FREQUENCY (MHz) 1.0 0.98 FREQUENCY (MHz) 0.88 BIAS CURRENT (mA) VIN = 5.5V µA) 0.96 0.82 210 VIN = 3.6V 0.5 0.94 0.76 VIN = 2.5V 0.92 0.70 160 0 2.5 3.5 4.5 5.5 – 40 –20 0 20 40 60 80 100 120 – 40 –20 0 20 40 60 80 100 120 SUPPLY VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 3447 G07 3447 G08 3447 G09 3447f 4
W U TYPICAL PERFOR A CE CHARACTERISTICS Effi ciency and Power Loss vs EffIciency and Power Loss vs DAC Nonlinearity Load Current (V Load Current (V IN = 5.5V) IN = 3.6V)
0.5 100 1000 100 1000 0.4 90 V 90 V OUTMAX OUTMAX 0.3 80 80 VOUTMIN POWER LOSS (mW) 0.2 POWER LOSS (mW) INL 70 70 100 100 0.1 VOUTMIN 60 60 0 50 50 LOSSMAX – 0.1 DNL ERROR (LSB) 40 40 EFFICIENCY (%) LOSSMAX 10 EFFICIENCY (%) 10 – 0.2 30 30 LOSSMIN – 0.3 20 LOSSMIN 20 – 0.4 10 10 – 0.5 0 1 0 1 0 10 20 30 40 50 60 1 10 100 1000 1 10 100 1000 DAC LOAD CURRENT (mA) LOAD CURRENT (mA) 3447 G04 3447 GO1 3447 G02
EffIciency and Power Loss vs Load Current (VIN = 2.5V) Output Voltage vs Load Current Bias Current vs Supply Voltage
100 1000 2.10 0.80 350 90 VOUTMAX 300 80 2.05 0.75 V POWER LOSS (mW) DAC = MAX V PULSE SKIP OUTMIN IN = 3.6V 250 70 100 V µA) V OUTMIN 60 (V) IN = 2.5V 200 50 2.00 0.70 DAC = MIN V LOSS IN = 3.6V (V) MAX 150 OUTMAX 40 V V EFFICIENCY (%) IN = 2.5V 10 30 LOSSMIN BIAS CURRENT ( 100 1.95 0.65 20 50 10 BURST 0 1 1.90 0.60 0 1 10 100 1000 0 200 400 600 800 1000 2.5 3.5 4.5 5.5 LOAD CURRENT (mA) LOAD CURRENT (mA) SUPPLY VOLTAGE (V) 3447 G03 3447 G05 3447 G06
Bias Current and Shutdown Frequency vs Supply Voltage Frequency vs Temperature Current vs Temperature
1.12 1.30 3.0 BIAS CURRENT 1.10 1.24 360 V 2.5 1.08 1.18 IN = 5.5V SHUTDOWN CURRENT ( VIN = 3.6V 1.06 1.12 2.0 VIN = 2.5V 1.04 1.06 310 1.02 1.00 1.5 1.00 0.94 260 SHUTDOWN CURRENT FREQUENCY (MHz) 1.0 0.98 FREQUENCY (MHz) 0.88 BIAS CURRENT (mA) VIN = 5.5V µA) 0.96 0.82 210 VIN = 3.6V 0.5 0.94 0.76 VIN = 2.5V 0.92 0.70 160 0 2.5 3.5 4.5 5.5 – 40 –20 0 20 40 60 80 100 120 – 40 –20 0 20 40 60 80 100 120 SUPPLY VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 3447 G07 3447 G08 3447 G09 3447f 4
