Datasheet LTC1735-1 (Analog Devices) - 6
| Hersteller | Analog Devices |
| Beschreibung | High Efficiency Synchronous Step-Down Switching Regulator |
| Seiten / Seite | 28 / 6 — TYPICAL PERFOR A CE CHARACTERISTICS. Oscillator Frequency. RUN/SS Pin … |
| Dateiformat / Größe | PDF / 356 Kb |
| Dokumentensprache | Englisch |
TYPICAL PERFOR A CE CHARACTERISTICS. Oscillator Frequency. RUN/SS Pin Current. PGOOD Pin Current. vs Temperature. VOUT(RIPPLE)
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LTC1735-1
W U TYPICAL PERFOR A CE CHARACTERISTICS Oscillator Frequency RUN/SS Pin Current PGOOD Pin Current vs Temperature vs Temperature vs Temperature
300 0 0 COSC = 47pF VRUN/SS = 0V VPGOOD = 0.85V 290 –1 –0.2 µA) µA) 280 –2 –0.4 270 –3 –0.6 FREQUENCY (kHz) RUN/SS CURRENT ( PGOOD PIN CURRENT ( 260 –4 –0.8 250 –5 –1.0 –40 –15 10 35 60 85 110 135 –40 –15 10 35 60 85 110 135 –40 –15 10 35 60 85 110 135 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 1735-1 G19 1735-1 G20 1735-1 G21
VOUT(RIPPLE) Start-Up VOUT(RIPPLE) (Synchronized) (Burst Mode Operation)
I FIGURE 1 LOAD = 10mA ILOAD = 50mA FIGURE 1 VOUT 1V/DIV VOUT VOUT 10mV/DIV 20mV/DIV VRUN/SS 5V/DIV IL IL 5A/DIV 5A/DIV IL 5A/DIV VIN = 15V 5ms/DIV 1735-1 G22 EXT SYNC f = fO 10µs/DIV 1735-1 G23 VIN = 15V 50µs/DIV 1735-1 G24 VOUT = 1.6V VIN = 15V VOUT = 1.6V RLOAD = 0.16Ω VOUT = 1.6V
VOUT(RIPPLE) Load Step (Burst Mode Operation) (Burst Mode Operation) Load Step (Continuous Mode)
ILOAD = 1.5A FIGURE 1 FIGURE 1 FIGURE 1 VOUT VOUT 20mV/DIV VOUT 50mV/DIV 50mV/DIV I I L IL L 5A/DIV 5A/DIV 5A/DIV VIN = 15V 5µs/DIV 1735-1 G25 10mA TO 10µs/DIV 1735-1 G26 0A TO 10µs/DIV 1735-1 G27 VOUT = 1.6V 11A LOAD STEP 11A LOAD STEP VIN = 15V PGOOD = 0V VOUT = 1.6V VIN = 15V VOUT = 1.6V 6
W U TYPICAL PERFOR A CE CHARACTERISTICS Oscillator Frequency RUN/SS Pin Current PGOOD Pin Current vs Temperature vs Temperature vs Temperature
300 0 0 COSC = 47pF VRUN/SS = 0V VPGOOD = 0.85V 290 –1 –0.2 µA) µA) 280 –2 –0.4 270 –3 –0.6 FREQUENCY (kHz) RUN/SS CURRENT ( PGOOD PIN CURRENT ( 260 –4 –0.8 250 –5 –1.0 –40 –15 10 35 60 85 110 135 –40 –15 10 35 60 85 110 135 –40 –15 10 35 60 85 110 135 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 1735-1 G19 1735-1 G20 1735-1 G21
VOUT(RIPPLE) Start-Up VOUT(RIPPLE) (Synchronized) (Burst Mode Operation)
I FIGURE 1 LOAD = 10mA ILOAD = 50mA FIGURE 1 VOUT 1V/DIV VOUT VOUT 10mV/DIV 20mV/DIV VRUN/SS 5V/DIV IL IL 5A/DIV 5A/DIV IL 5A/DIV VIN = 15V 5ms/DIV 1735-1 G22 EXT SYNC f = fO 10µs/DIV 1735-1 G23 VIN = 15V 50µs/DIV 1735-1 G24 VOUT = 1.6V VIN = 15V VOUT = 1.6V RLOAD = 0.16Ω VOUT = 1.6V
VOUT(RIPPLE) Load Step (Burst Mode Operation) (Burst Mode Operation) Load Step (Continuous Mode)
ILOAD = 1.5A FIGURE 1 FIGURE 1 FIGURE 1 VOUT VOUT 20mV/DIV VOUT 50mV/DIV 50mV/DIV I I L IL L 5A/DIV 5A/DIV 5A/DIV VIN = 15V 5µs/DIV 1735-1 G25 10mA TO 10µs/DIV 1735-1 G26 0A TO 10µs/DIV 1735-1 G27 VOUT = 1.6V 11A LOAD STEP 11A LOAD STEP VIN = 15V PGOOD = 0V VOUT = 1.6V VIN = 15V VOUT = 1.6V 6