Datasheet LTC3713 (Analog Devices) - 4
| Hersteller | Analog Devices |
| Beschreibung | Low Input Voltage, High Power, No RSENSE Synchronous Buck DC/DC Controller |
| Seiten / Seite | 24 / 4 — TYPICAL PERFOR A CE CHARACTERISTICS. Transient Response. (Discontinuous … |
| Dateiformat / Größe | PDF / 291 Kb |
| Dokumentensprache | Englisch |
TYPICAL PERFOR A CE CHARACTERISTICS. Transient Response. (Discontinuous Mode). Start-Up from Shutdown
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LTC3713
W U TYPICAL PERFOR A CE CHARACTERISTICS Transient Response Transient Response (Discontinuous Mode) Start-Up from Shutdown
VOUT VOUT 100mV/DIV 100mV/DIV VOUT 500mV/DIV I IL L IL 5A/DIV 5A/DIV 5A/DIV 50µs/DIV 3713 G01 50µs/DIV 3713 G02 500µs/DIV 3713 G03 LOAD STEP 0A TO 6A LOAD STEP 600mA TO 6A VIN = 3.3V VIN = 3.3V VIN = 3.3V VOUT = 1.25V VOUT = 1.25V VOUT = 1.25V L = 1.8µH FCB = 0V FCB = INTVCC COUT = 540µF FIGURE 1 CIRCUIT FIGURE 1 CIRCUIT LOAD = 0.2Ω
Boost Converter Oscillator Boost Converter Current Limit Frequency vs Temperature SHDN Pin Current vs VSHDN vs Duty Cycle
2.00 50 1000 TA = 25°C 1.75 VIN = 5V 900 µA) 40 1.50 800 70°C V 1.25 IN = 1.5V 700 30 1.00 600 25°C 20 0.75 500 CURRENT LIMIT (mA) –40°C 0.50 400 10 SWITCHING FREQUENCY (MHz) SHDN PIN BIAS CURRENT ( 0.25 300 0 0 200 –50 –25 0 25 50 75 100 0 1 2 3 4 5 10 20 30 40 50 60 70 80 TEMPERATURE (°C) SHDN PIN VOLTAGE (V) DUTY CYCLE (%) 3713 G04 3713 G05 3713 G06
Efficiency vs Load Current Efficiency vs Load Current VFB2, Feedback Pin Voltage (Discontinuous Mode) (Force Continuous)
1.25 100 100 90 90 1.24 80 VIN = 2.5V VIN = 2.5V VOLTAGE 80 70 VIN = 3.3V 1.23 VIN = 3.3V 60 70 50 60 1.22 40 EFFICIENCY (%) EFFICIENCY (%) 50 30 FEEDBACK PIN VOLTAGE (V) 1.21 20 40 10 FIGURE 1 CIRCUIT (B) FIGURE 1 CIRCUIT (B) 1.20 30 0 –50 –25 0 25 50 75 100 0.01 0.04 0.07 0.1 0.4 0.7 1 4 7 10 0.01 0.05 0.09 0.4 0.8 3 7 TEMPERATURE (°C) LOAD CURRENT (A) LOAD CURRENT (A) 3713 G07 1713 G09 3713 G10 3713fa 4
W U TYPICAL PERFOR A CE CHARACTERISTICS Transient Response Transient Response (Discontinuous Mode) Start-Up from Shutdown
VOUT VOUT 100mV/DIV 100mV/DIV VOUT 500mV/DIV I IL L IL 5A/DIV 5A/DIV 5A/DIV 50µs/DIV 3713 G01 50µs/DIV 3713 G02 500µs/DIV 3713 G03 LOAD STEP 0A TO 6A LOAD STEP 600mA TO 6A VIN = 3.3V VIN = 3.3V VIN = 3.3V VOUT = 1.25V VOUT = 1.25V VOUT = 1.25V L = 1.8µH FCB = 0V FCB = INTVCC COUT = 540µF FIGURE 1 CIRCUIT FIGURE 1 CIRCUIT LOAD = 0.2Ω
Boost Converter Oscillator Boost Converter Current Limit Frequency vs Temperature SHDN Pin Current vs VSHDN vs Duty Cycle
2.00 50 1000 TA = 25°C 1.75 VIN = 5V 900 µA) 40 1.50 800 70°C V 1.25 IN = 1.5V 700 30 1.00 600 25°C 20 0.75 500 CURRENT LIMIT (mA) –40°C 0.50 400 10 SWITCHING FREQUENCY (MHz) SHDN PIN BIAS CURRENT ( 0.25 300 0 0 200 –50 –25 0 25 50 75 100 0 1 2 3 4 5 10 20 30 40 50 60 70 80 TEMPERATURE (°C) SHDN PIN VOLTAGE (V) DUTY CYCLE (%) 3713 G04 3713 G05 3713 G06
Efficiency vs Load Current Efficiency vs Load Current VFB2, Feedback Pin Voltage (Discontinuous Mode) (Force Continuous)
1.25 100 100 90 90 1.24 80 VIN = 2.5V VIN = 2.5V VOLTAGE 80 70 VIN = 3.3V 1.23 VIN = 3.3V 60 70 50 60 1.22 40 EFFICIENCY (%) EFFICIENCY (%) 50 30 FEEDBACK PIN VOLTAGE (V) 1.21 20 40 10 FIGURE 1 CIRCUIT (B) FIGURE 1 CIRCUIT (B) 1.20 30 0 –50 –25 0 25 50 75 100 0.01 0.04 0.07 0.1 0.4 0.7 1 4 7 10 0.01 0.05 0.09 0.4 0.8 3 7 TEMPERATURE (°C) LOAD CURRENT (A) LOAD CURRENT (A) 3713 G07 1713 G09 3713 G10 3713fa 4