Datasheet LTC3417A-2 (Analog Devices) - 5
| Fabricante | Analog Devices |
| Descripción | Dual Synchronous 1.5A/1A 4MHz Step-Down DC/DC Regulator |
| Páginas / Página | 20 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. OUT1 Effi ciency vs VIN. OUT1 Effi … |
| Formato / tamaño de archivo | PDF / 345 Kb |
| Idioma del documento | Inglés |
TYPICAL PERFORMANCE CHARACTERISTICS. OUT1 Effi ciency vs VIN. OUT1 Effi ciency vs Load Current. OUT2 Effi ciency vs Load Current
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LTC3417A-2
TYPICAL PERFORMANCE CHARACTERISTICS OUT1 Effi ciency vs VIN OUT1 Effi ciency vs Load Current OUT2 Effi ciency vs Load Current (Burst Mode Operation)
100 100 100 VIN = 2.5V VIN = 3.6V VOUT = 1.8V V 95 OUT = 1.8V V 95 OUT = 2.5V 95 ILOAD = 460mA 90 90 90 85 85 ILOAD = 1.4A 80 80 85 75 75 EFFICIENCY (%) Burst Mode EFFICIENCY (%) Burst Mode EFFICIENCY (%) 80 OPERATION 70 70 OPERATION PULSE SKIP PULSE SKIP FORCED FORCED 75 65 65 CONTINUOUS CONTINUOUS REFER TO FIGURE 4 REFER TO FIGURE 4 REFER TO FIGURE 4 60 60 70 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 2 2.5 3 3.5 4 4.5 5 5.5 LOAD CURRENT (A) LOAD CURRENT (A) VIN (V) 3417A-2 G07 3417A-2 G08 3417A-2 G09
OUT2 Effi ciency vs VIN (Pulse Skipping Mode) Load Step OUT1 Load Step OUT2
100 ILOAD = 250mA 95 VOUT1 VOUT2 100mV/DIV 100mV/DIV I 90 LOAD = 800mA 85 IOUT1 IOUT2 500mA/DIV 500mA/DIV EFFICIENCY (%) 80 75 3417A-2 G11 3417A-2 G12 V V 100μs/DIV V 100μs/DIV OUT = 2.5V IN = 3.6V IN = 3.6V REFER TO FIGURE 4 VOUT = 1.8V VOUT = 2.5V 70 ILOAD = 0.25A to 1.4A ILOAD = 0.25A to 0.8A 2 2.5 3 3.5 4 4.5 5 5.5 REFER TO FIGURE 4 REFER TO FIGURE 4 VIN (V) 3417A-2 G10
Effi ciency vs Frequency OUT1 Effi ciency vs Frequency OUT2 RDS(ON) vs VIN OUT1
94 90 0.105 TA = 27°C TA = 27°C VIN = 3.6V 92 VOUT = 1.8V 85 0.100 IOUT = 300mA P-CHANNEL SWITCH 90 80 0.095 (Ω) 88 75 DS(ON)R 0.090 EFFICIENCY (%) 86 EFFICIENCY (%) 70 TA = 27°C 0.085 84 65 VIN = 3.6V VOUT = 2.5V N-CHANNEL SWITCH IOUT = 100mA 82 60 0.080 0 1 2 3 4 5 0 1 2 3 4 2 2.5 3 3.5 4 4.5 5 5.5 FREQUENCY (MHz) FREQUENCY (MHz) VIN (V) 3417A-2 G13 3417A-2 G14 3417A-2 G15 3417a2fa 5
TYPICAL PERFORMANCE CHARACTERISTICS OUT1 Effi ciency vs VIN OUT1 Effi ciency vs Load Current OUT2 Effi ciency vs Load Current (Burst Mode Operation)
100 100 100 VIN = 2.5V VIN = 3.6V VOUT = 1.8V V 95 OUT = 1.8V V 95 OUT = 2.5V 95 ILOAD = 460mA 90 90 90 85 85 ILOAD = 1.4A 80 80 85 75 75 EFFICIENCY (%) Burst Mode EFFICIENCY (%) Burst Mode EFFICIENCY (%) 80 OPERATION 70 70 OPERATION PULSE SKIP PULSE SKIP FORCED FORCED 75 65 65 CONTINUOUS CONTINUOUS REFER TO FIGURE 4 REFER TO FIGURE 4 REFER TO FIGURE 4 60 60 70 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 2 2.5 3 3.5 4 4.5 5 5.5 LOAD CURRENT (A) LOAD CURRENT (A) VIN (V) 3417A-2 G07 3417A-2 G08 3417A-2 G09
OUT2 Effi ciency vs VIN (Pulse Skipping Mode) Load Step OUT1 Load Step OUT2
100 ILOAD = 250mA 95 VOUT1 VOUT2 100mV/DIV 100mV/DIV I 90 LOAD = 800mA 85 IOUT1 IOUT2 500mA/DIV 500mA/DIV EFFICIENCY (%) 80 75 3417A-2 G11 3417A-2 G12 V V 100μs/DIV V 100μs/DIV OUT = 2.5V IN = 3.6V IN = 3.6V REFER TO FIGURE 4 VOUT = 1.8V VOUT = 2.5V 70 ILOAD = 0.25A to 1.4A ILOAD = 0.25A to 0.8A 2 2.5 3 3.5 4 4.5 5 5.5 REFER TO FIGURE 4 REFER TO FIGURE 4 VIN (V) 3417A-2 G10
Effi ciency vs Frequency OUT1 Effi ciency vs Frequency OUT2 RDS(ON) vs VIN OUT1
94 90 0.105 TA = 27°C TA = 27°C VIN = 3.6V 92 VOUT = 1.8V 85 0.100 IOUT = 300mA P-CHANNEL SWITCH 90 80 0.095 (Ω) 88 75 DS(ON)R 0.090 EFFICIENCY (%) 86 EFFICIENCY (%) 70 TA = 27°C 0.085 84 65 VIN = 3.6V VOUT = 2.5V N-CHANNEL SWITCH IOUT = 100mA 82 60 0.080 0 1 2 3 4 5 0 1 2 3 4 2 2.5 3 3.5 4 4.5 5 5.5 FREQUENCY (MHz) FREQUENCY (MHz) VIN (V) 3417A-2 G13 3417A-2 G14 3417A-2 G15 3417a2fa 5