Datasheet LTC3417A-2 (Analog Devices) - 5

制造商Analog Devices
描述Dual Synchronous 1.5A/1A 4MHz Step-Down DC/DC Regulator
页数 / 页20 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. OUT1 Effi ciency vs VIN. OUT1 Effi …
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TYPICAL PERFORMANCE CHARACTERISTICS. OUT1 Effi ciency vs VIN. OUT1 Effi ciency vs Load Current. OUT2 Effi ciency vs Load Current

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