Datasheet LTC3412A (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | 3A, 4MHz, Monolithic Synchronous Step-Down Regulator |
| 页数 / 页 | 20 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. Load Step Transient Forced. … |
| 文件格式/大小 | PDF / 460 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. Load Step Transient Forced. Continuous. Start-Up Transient. VREF vs Temperature
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LTC3412A
TYPICAL PERFORMANCE CHARACTERISTICS Load Step Transient Forced Continuous Start-Up Transient VREF vs Temperature
0.7975 VIN = 3.3V V 0.7970 OUT 2V/DIV V 0.7965 OUT 100mV/DIV 0.7960 (V) 0.7955 RUN/SS 2V/DIV V REF 0.7950 INDUCTOR 0.7945 CURRENT INDUCTOR 2A/DIV CURRENT 0.7940 2A/DIV 0.7935 0.7930 VIN = 3.3V 40µs/DIV VIN = 3.3V 1ms/DIV –45 –25 –5 15 35 55 75 95 115 VOUT =2.5V VOUT =2.5V TEMPERATURE (°C) f = 1MHz 3412A G10 LOAD STEP = 2A 3412A G11 3412A G12 LOAD STEP = 0A TO 3A FIGURE 4 CIRCUIT FIGURE 4 CIRCUIT
Switch On-Resistance Switch On-Resistance Switch Leakage Current vs Input Voltage vs Temperature vs Input Voltage
100 120 50 V 95 IN = 3.3V 45 90 100 40 85 35 PFET 80 80 PFET 30 75 60 25 PFET 70 NFET 20 NFET 40 ON-RESISTANCE (mΩ) 65 ON-RESISTANCE (mΩ) 15 60 10 20 SWITCH LEAKAGE CURRENT (nA) 55 5 NFET 50 0 0 2.5 3.0 3.5 4.0 4.5 5.0 –40 –20 0 20 40 60 80 100 120 2.5 3.0 3.5 4.0 4.5 5.0 5.5 INPUT VOLTAGE (V) TEMPERATURE (°C) INPUT VOLTAGE (V) 3412A G13 3412A G14 3412A G15
Frequency vs ROSC Frequency vs Input Voltage Frequency vs Temperature
5000 1060 1020 V R VIN = 3.3V 4500 IN = 3.3V OSC = 294k 1015 R 1050 OSC = 294k 4000 1010 3500 1040 1005 3000 1030 1000 2500 995 1020 2000 990 FREQUENCY (kHz) 1500 FREQUENCY (kHz) 1010 FREQUENCY (kHz) 985 1000 980 1000 500 975 0 990 970 40 140 240 340 440 540 640 740 840 940 2.5 3.0 3.5 4.0 4.5 5.0 5.5 –40 –20 0 20 40 60 80 100 120 ROSC (kΩ) INPUT VOLTAGE (V) TEMPERATURE (°C) 3412A G16 3412A G17 3412A G18 3412aff Fo F r o rmo m r o e r e inf n o f r o m r a m t a iton o n ww w w w . w line n a e r a .rco c m o / m L / T L C T 3 C 41 3 2 41 A 2 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Load Step Transient Forced Continuous Start-Up Transient VREF vs Temperature
0.7975 VIN = 3.3V V 0.7970 OUT 2V/DIV V 0.7965 OUT 100mV/DIV 0.7960 (V) 0.7955 RUN/SS 2V/DIV V REF 0.7950 INDUCTOR 0.7945 CURRENT INDUCTOR 2A/DIV CURRENT 0.7940 2A/DIV 0.7935 0.7930 VIN = 3.3V 40µs/DIV VIN = 3.3V 1ms/DIV –45 –25 –5 15 35 55 75 95 115 VOUT =2.5V VOUT =2.5V TEMPERATURE (°C) f = 1MHz 3412A G10 LOAD STEP = 2A 3412A G11 3412A G12 LOAD STEP = 0A TO 3A FIGURE 4 CIRCUIT FIGURE 4 CIRCUIT
Switch On-Resistance Switch On-Resistance Switch Leakage Current vs Input Voltage vs Temperature vs Input Voltage
100 120 50 V 95 IN = 3.3V 45 90 100 40 85 35 PFET 80 80 PFET 30 75 60 25 PFET 70 NFET 20 NFET 40 ON-RESISTANCE (mΩ) 65 ON-RESISTANCE (mΩ) 15 60 10 20 SWITCH LEAKAGE CURRENT (nA) 55 5 NFET 50 0 0 2.5 3.0 3.5 4.0 4.5 5.0 –40 –20 0 20 40 60 80 100 120 2.5 3.0 3.5 4.0 4.5 5.0 5.5 INPUT VOLTAGE (V) TEMPERATURE (°C) INPUT VOLTAGE (V) 3412A G13 3412A G14 3412A G15
Frequency vs ROSC Frequency vs Input Voltage Frequency vs Temperature
5000 1060 1020 V R VIN = 3.3V 4500 IN = 3.3V OSC = 294k 1015 R 1050 OSC = 294k 4000 1010 3500 1040 1005 3000 1030 1000 2500 995 1020 2000 990 FREQUENCY (kHz) 1500 FREQUENCY (kHz) 1010 FREQUENCY (kHz) 985 1000 980 1000 500 975 0 990 970 40 140 240 340 440 540 640 740 840 940 2.5 3.0 3.5 4.0 4.5 5.0 5.5 –40 –20 0 20 40 60 80 100 120 ROSC (kΩ) INPUT VOLTAGE (V) TEMPERATURE (°C) 3412A G16 3412A G17 3412A G18 3412aff Fo F r o rmo m r o e r e inf n o f r o m r a m t a iton o n ww w w w . w line n a e r a .rco c m o / m L / T L C T 3 C 41 3 2 41 A 2 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Related Parts