Datasheet LTC3415 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | 7A, PolyPhase Synchronous Step-Down Regulator |
| Pages / Page | 28 / 4 — TYPICAL PERFORMANCE CHARACTERISTICS. Effi ciency and Power Loss vs Load … |
| File Format / Size | PDF / 322 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Effi ciency and Power Loss vs Load Current (3 Operating Modes) (Reference Figure 13)
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LTC3415
TYPICAL PERFORMANCE CHARACTERISTICS Effi ciency and Power Loss vs Load Current (3 Operating Modes) (Reference Figure 13) Supply Current vs VIN RDSON vs VIN
100 10 1.6 40 VOUT = 1.8V 90 VIN = 3.3V 1.4 35 80 PFET 1 POWER LOSS (mW) 1.2 30 70 VO = 1.2V PULSE SKIP 60 1.0 25 NFET 50 0.1 0.8 ANCE (mΩ) 20 40 Y CURRENT (mA) 0.6 15 EFFICIENCY (%) % (Burst) VO = 1.2V BURST MODE 30 % (PSKIP) 0.01 ON-RESIST % (FC) SUPPL 0.4 10 20 W (Burst) 10 W (PSKIP) 0.2 5 W (FC) 0 0.001 0 0 0.001 0.01 0.1 1 10 2.5 3 3.5 4 4.5 5 5.5 2.25 3.25 4.25 5.25 LOAD CURRENT (A) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 3415 G01 3415 G03 3415 G04
Load Regulation Load Step RDSON vs Temperature (Reference Figure 13) (Reference Figure 13)
40 0.5 FC MODE 0.4 V V OUT IN = 3.3V (AC) V 35 POWER PMOS 0.3 OUT = 1.8V 100mV/ DIV 0.2 30 0.1 I (mΩ) L 5A/ 0 DIV DSONR 25 –0.1 POWER NMOS IOUT –0.2 LOAD REGULATION (%) 5A/DIV 20 –0.3 40μs/DIV –0.4 VIN = 3.3V FORCED CONTINUOUS V –0.5 OUT = 1.8V ILOAD = 0.1A TO 5A 15 0 1 2 3 4 5 6 7 8 3415 G08 –100 –50 0 50 100 150 TEMPERATURE (°C) LOAD CURRENT (A) 3415 G05 3415 G06
Oscillator Frequency Effi ciency and Power Loss vs Load vs Temperature Current Force Continuous Mode
2.0 100 10 VOUT = 1.8V 90 1.8 80 POWER LOSS (mW) 70 EFFICIENCY 1 1.6 60 50 1.4 40 EFFICIENCY (%) 0.1 30 POWER LOSS 1.2 20 OSCILLATOR FREQUENCY (MHz) 2.5V 10 3.3V 5V 1.0 0 0.01 –100 –50 0 50 100 150 0.01 0.1 1 10 TEMPERATURE (°C) LOAD CURRENT (A) 3415 G02 3415 G11 3415fa 4
TYPICAL PERFORMANCE CHARACTERISTICS Effi ciency and Power Loss vs Load Current (3 Operating Modes) (Reference Figure 13) Supply Current vs VIN RDSON vs VIN
100 10 1.6 40 VOUT = 1.8V 90 VIN = 3.3V 1.4 35 80 PFET 1 POWER LOSS (mW) 1.2 30 70 VO = 1.2V PULSE SKIP 60 1.0 25 NFET 50 0.1 0.8 ANCE (mΩ) 20 40 Y CURRENT (mA) 0.6 15 EFFICIENCY (%) % (Burst) VO = 1.2V BURST MODE 30 % (PSKIP) 0.01 ON-RESIST % (FC) SUPPL 0.4 10 20 W (Burst) 10 W (PSKIP) 0.2 5 W (FC) 0 0.001 0 0 0.001 0.01 0.1 1 10 2.5 3 3.5 4 4.5 5 5.5 2.25 3.25 4.25 5.25 LOAD CURRENT (A) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 3415 G01 3415 G03 3415 G04
Load Regulation Load Step RDSON vs Temperature (Reference Figure 13) (Reference Figure 13)
40 0.5 FC MODE 0.4 V V OUT IN = 3.3V (AC) V 35 POWER PMOS 0.3 OUT = 1.8V 100mV/ DIV 0.2 30 0.1 I (mΩ) L 5A/ 0 DIV DSONR 25 –0.1 POWER NMOS IOUT –0.2 LOAD REGULATION (%) 5A/DIV 20 –0.3 40μs/DIV –0.4 VIN = 3.3V FORCED CONTINUOUS V –0.5 OUT = 1.8V ILOAD = 0.1A TO 5A 15 0 1 2 3 4 5 6 7 8 3415 G08 –100 –50 0 50 100 150 TEMPERATURE (°C) LOAD CURRENT (A) 3415 G05 3415 G06
Oscillator Frequency Effi ciency and Power Loss vs Load vs Temperature Current Force Continuous Mode
2.0 100 10 VOUT = 1.8V 90 1.8 80 POWER LOSS (mW) 70 EFFICIENCY 1 1.6 60 50 1.4 40 EFFICIENCY (%) 0.1 30 POWER LOSS 1.2 20 OSCILLATOR FREQUENCY (MHz) 2.5V 10 3.3V 5V 1.0 0 0.01 –100 –50 0 50 100 150 0.01 0.1 1 10 TEMPERATURE (°C) LOAD CURRENT (A) 3415 G02 3415 G11 3415fa 4
