Datasheet LTC3707-SYNC (Analog Devices) - 7
| 制造商 | Analog Devices |
| 描述 | High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator |
| 页数 / 页 | 32 / 7 — TYPICAL PERFORMANCE CHARACTERISTICS. Input Source/Capacitor. Constant … |
| 文件格式/大小 | PDF / 404 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. Input Source/Capacitor. Constant Frequency (Burst Inhibit)
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LTC3707-SYNC
TYPICAL PERFORMANCE CHARACTERISTICS Input Source/Capacitor Constant Frequency (Burst Inhibit) Instantaneous Current (Figure 13) Burst Mode Operation (Figure 13) Operation (Figure 13)
IIN 2A/DIV VOUT VOUT 20mV/DIV VIN 20mV/DIV 200mV/DIV VSW1 10V/DIV VSW2 I I OUT OUT 10V/DIV 0.5A/DIV 0.5A/DIV VIN = 15V 1μs/DIV 3707 G22 VIN = 15V 10μs/DIV 3707 G23 VIN = 15V 2μs/DIV 3707 G24 VOUT = 5V VOUT = 5V VOUT = 5V IOUT5 = IOUT3.3 = 2A VFCB = OPEN VFCB = 5V IOUT = 20mA IOUT = 20mA
Current Sense Pin Input Current EXTVCC Switch Resistance Oscillator Frequency vs Temperature vs Temperature vs Temperature
35 10 350 VOUT = 5V VPLLFLTR = 2.4V 300 33 8 250 VPLLFLTR = 1.2V 31 6 200 150 V 29 4 PLLFLTR = 0V SWITCH RESISTANCE (Ω) FREQUENCY (kHz) 100 CC 27 2 EXTV 50 CURRENT SENSE INPUT CURRENT (μA) 25 0 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3707 G26 3707 G27 3707 G28
Undervoltage Lockout Shutdown Latch Thresholds vs Temperature vs Temperature
3.50 4.5 4.0 LATCH ARMING 3.45 3.5 3.40 3.0 LATCHOFF THRESHOLD 2.5 3.35 2.0 3.30 1.5 1.0 UNDERVOLTAGE LOCKOUT (V) 3.25 SHUTDOWN LATCH THRESHOLDS (V) 0.5 3.20 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) 3707 G29 3707 G30 3707sfa 7
TYPICAL PERFORMANCE CHARACTERISTICS Input Source/Capacitor Constant Frequency (Burst Inhibit) Instantaneous Current (Figure 13) Burst Mode Operation (Figure 13) Operation (Figure 13)
IIN 2A/DIV VOUT VOUT 20mV/DIV VIN 20mV/DIV 200mV/DIV VSW1 10V/DIV VSW2 I I OUT OUT 10V/DIV 0.5A/DIV 0.5A/DIV VIN = 15V 1μs/DIV 3707 G22 VIN = 15V 10μs/DIV 3707 G23 VIN = 15V 2μs/DIV 3707 G24 VOUT = 5V VOUT = 5V VOUT = 5V IOUT5 = IOUT3.3 = 2A VFCB = OPEN VFCB = 5V IOUT = 20mA IOUT = 20mA
Current Sense Pin Input Current EXTVCC Switch Resistance Oscillator Frequency vs Temperature vs Temperature vs Temperature
35 10 350 VOUT = 5V VPLLFLTR = 2.4V 300 33 8 250 VPLLFLTR = 1.2V 31 6 200 150 V 29 4 PLLFLTR = 0V SWITCH RESISTANCE (Ω) FREQUENCY (kHz) 100 CC 27 2 EXTV 50 CURRENT SENSE INPUT CURRENT (μA) 25 0 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3707 G26 3707 G27 3707 G28
Undervoltage Lockout Shutdown Latch Thresholds vs Temperature vs Temperature
3.50 4.5 4.0 LATCH ARMING 3.45 3.5 3.40 3.0 LATCHOFF THRESHOLD 2.5 3.35 2.0 3.30 1.5 1.0 UNDERVOLTAGE LOCKOUT (V) 3.25 SHUTDOWN LATCH THRESHOLDS (V) 0.5 3.20 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) 3707 G29 3707 G30 3707sfa 7