Datasheet LTC3834 (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | 30μA IQ Synchronous Step-Down Controller |
| 页数 / 页 | 30 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. … |
| 文件格式/大小 | PDF / 793 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Load Step. Load Step (Burst Mode Operation)
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LTC3834
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Load Step Load Step (Burst Mode Operation) (Forced Continuous Mode) Load Step (Pulse Skipping Mode)
VOUT VOUT VOUT 100mV/DIV 100mV/DIV 100mV/DIV AC AC AC COUPLED COUPLED COUPLED IL IL 2A/DIV IL 2A/DIV 2A/DIV V 3834 G06 OUT = 3.3V 3834 G04 20µs/DIV VOUT = 3.3V 3834 G05 20µs/DIV VOUT = 3.3V 20µs/DIV FIGURE 11 CIRCUIT FIGURE 11 CIRCUIT FIGURE 11 CIRCUIT
Inductor Current at Light Load Soft Start-Up Tracking Start-Up
FORCED CONTINUOUS MASTER MODE 2V/DIV 2A/DIV V Burst Mode OUT 1V/DIV VOUT OPERATION 2V/DIV PULSE SKIPPING MODE V 3834 G08 OUT = 3.3V 3834 G07 2µs/DIV 20ms/DIV 3834 G09 20ms/DIV ILOAD = 100µA FIGURE 11 CIRCUIT FIGURE 11 CIRCUIT FIGURE 11 CIRCUIT
Total Input Supply Current vs EXTVCC Switchover and INTVCC Input Voltage Voltages vs Temperature INTVCC Line Regulation
350 6.0 5.5 FIGURE 11 CIRCUIT 5.8 300 5.6 5.4 250 TAGE (V) 5.4 INTVCC 200 VOL 5.2 5.3 TAGE (V) V CC 5.0 150 VOL Y CURRENT (µA) EXTVCC RISING 300µA LOAD 4.8 5.2 V CC AND INT SUPPL 100 4.6 INT V CC EXTVCC FALLING 4.4 5.1 50 NO LOAD EXT 4.2 0 4.0 5.0 5 10 15 20 25 30 35 –45 –25 –5 15 35 55 75 95 0 5 10 15 20 25 30 35 40 INPUT VOLTAGE (V) TEMPERATURE (°C) INPUT VOLTAGE (V) 3834 G10 3834 G11 3834 G12 3834fc For more information www.linear.com/LTC3834 5 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Operation Package Description Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Load Step Load Step (Burst Mode Operation) (Forced Continuous Mode) Load Step (Pulse Skipping Mode)
VOUT VOUT VOUT 100mV/DIV 100mV/DIV 100mV/DIV AC AC AC COUPLED COUPLED COUPLED IL IL 2A/DIV IL 2A/DIV 2A/DIV V 3834 G06 OUT = 3.3V 3834 G04 20µs/DIV VOUT = 3.3V 3834 G05 20µs/DIV VOUT = 3.3V 20µs/DIV FIGURE 11 CIRCUIT FIGURE 11 CIRCUIT FIGURE 11 CIRCUIT
Inductor Current at Light Load Soft Start-Up Tracking Start-Up
FORCED CONTINUOUS MASTER MODE 2V/DIV 2A/DIV V Burst Mode OUT 1V/DIV VOUT OPERATION 2V/DIV PULSE SKIPPING MODE V 3834 G08 OUT = 3.3V 3834 G07 2µs/DIV 20ms/DIV 3834 G09 20ms/DIV ILOAD = 100µA FIGURE 11 CIRCUIT FIGURE 11 CIRCUIT FIGURE 11 CIRCUIT
Total Input Supply Current vs EXTVCC Switchover and INTVCC Input Voltage Voltages vs Temperature INTVCC Line Regulation
350 6.0 5.5 FIGURE 11 CIRCUIT 5.8 300 5.6 5.4 250 TAGE (V) 5.4 INTVCC 200 VOL 5.2 5.3 TAGE (V) V CC 5.0 150 VOL Y CURRENT (µA) EXTVCC RISING 300µA LOAD 4.8 5.2 V CC AND INT SUPPL 100 4.6 INT V CC EXTVCC FALLING 4.4 5.1 50 NO LOAD EXT 4.2 0 4.0 5.0 5 10 15 20 25 30 35 –45 –25 –5 15 35 55 75 95 0 5 10 15 20 25 30 35 40 INPUT VOLTAGE (V) TEMPERATURE (°C) INPUT VOLTAGE (V) 3834 G10 3834 G11 3834 G12 3834fc For more information www.linear.com/LTC3834 5 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Operation Package Description Typical Application Related Parts