Datasheet LTC3729 (Analog Devices) - 7
| 制造商 | Analog Devices |
| 描述 | 550kHz, PolyPhase, High Efficiency, Synchronous Step-Down Switching Regulator |
| 页数 / 页 | 30 / 7 — TYPICAL PERFORMANCE CHARACTERISTICS. Soft-Start Up (Figure 12). Load Step … |
| 文件格式/大小 | PDF / 356 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. Soft-Start Up (Figure 12). Load Step (Figure 12). Current Sense Pin Input Current
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LTC3729
TYPICAL PERFORMANCE CHARACTERISTICS Soft-Start Up (Figure 12) Load Step (Figure 12)
VITH I 1V/DIV OUT 0/30A VITH VOUT 1V/DIV 2V/DIV VOUT 200mV/DIV VRUNSS 2V/DIV 3729 G20 100ms/DIV 3729 G21 10µs/DIV
Current Sense Pin Input Current EXTVCC Switch Resistance Oscillator Frequency vs Temperature vs Temperature vs Temperature
35 10 700 VOUT = 5V 600 33 8 VPLLFLTR = 2.4V 500 31 6 VPLLFLTR = 1.2V 400 29 4 300 VPLLFLTR = 0V SWITCH RESISTANCE (Ω) FREQUENCY (kHz) CC 200 27 2 EXTV 100 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) 3729 G23 3729 G24 3729 G25
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 UNDERVOLTAGE LOCKOUT (V) 1.0 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) 3729 G26 3729 G27 3729fb 7 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Soft-Start Up (Figure 12) Load Step (Figure 12)
VITH I 1V/DIV OUT 0/30A VITH VOUT 1V/DIV 2V/DIV VOUT 200mV/DIV VRUNSS 2V/DIV 3729 G20 100ms/DIV 3729 G21 10µs/DIV
Current Sense Pin Input Current EXTVCC Switch Resistance Oscillator Frequency vs Temperature vs Temperature vs Temperature
35 10 700 VOUT = 5V 600 33 8 VPLLFLTR = 2.4V 500 31 6 VPLLFLTR = 1.2V 400 29 4 300 VPLLFLTR = 0V SWITCH RESISTANCE (Ω) FREQUENCY (kHz) CC 200 27 2 EXTV 100 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) 3729 G23 3729 G24 3729 G25
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 UNDERVOLTAGE LOCKOUT (V) 1.0 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) 3729 G26 3729 G27 3729fb 7 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts