Datasheet LTC7851, LTC7851-1 (Analog Devices) - 8
| 制造商 | Analog Devices |
| 描述 | Quad Output, Multiphase Step-Down Voltage Mode DC/DC Controller with Accurate Current Sharing |
| 页数 / 页 | 38 / 8 — TYPICAL PERFORMANCE CHARACTERISTICS. 600kHz Preset Frequency vs. 1MHz … |
| 修订版 | A |
| 文件格式/大小 | PDF / 4.2 Mb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. 600kHz Preset Frequency vs. 1MHz Preset Frequency vs. Temperature
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LTC7851/LTC7851-1
TYPICAL PERFORMANCE CHARACTERISTICS 600kHz Preset Frequency vs 1MHz Preset Frequency vs Temperature Temperature Quiescent Current vs Temperature
600 1000 75 VIN = VCC = 5V RUN1 = RUN2 = RUN3 = RUN4 = 5V 595 990 590 980 70 585 970 580 TOR FREQUENCY (kHz) TOR FREQUENCY (kHz) 960 65 575 QUIESCENT CURRENT (mA) OSCILLA OSCILLA 950 570 565 940 60 –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) 7851 G23 7851 G24 7851 G25
Shutdown Quiescent Current vs Shutdown Quiescent Current vs Supply Voltage Temperature RUN Threshold vs Temperature
70 65 2.5 2.4 60 2.3 RISING 50 2.2 60 40 2.1 TAGE (V) 2.0 FALLING 30 1.9 55 20 1.8 RUN PIN VOL SHUTDOWN CURRENT (µA) SHUTDOWN CURRENT (µA) 1.7 10 1.6 0 50 1.5 0 1 2 3 4 5 6 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 SUPPLY VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 7851 G26 7851 G27 7851 G28
RUN Pull-Up Current vs TRACK/SS Current vs TRACK/SS TRACK/SS Pull-Up Current vs Temperature Voltage Temperature
2.2 0.5 3.0 2.9 2.0 0 2.8 –0.5 1.8 2.7 –1.0 1.6 2.6 –1.5 2.5 1.4 RUN PIN CURRENT (µA) –2.0 2.4 1.2 TRACK/SS PIN CURRENT (µA) TRACK/SS PIN CURRENT (µA) –2.5 2.3 1.0 –3.0 2.2 –50 –25 0 25 50 75 100 125 0 1 2 3 4 5 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TRACK/SS PIN VOLTAGE (V) TEMPERATURE (°C) 7851 G29 7851 G30 7851 G31 Rev A 8 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS 600kHz Preset Frequency vs 1MHz Preset Frequency vs Temperature Temperature Quiescent Current vs Temperature
600 1000 75 VIN = VCC = 5V RUN1 = RUN2 = RUN3 = RUN4 = 5V 595 990 590 980 70 585 970 580 TOR FREQUENCY (kHz) TOR FREQUENCY (kHz) 960 65 575 QUIESCENT CURRENT (mA) OSCILLA OSCILLA 950 570 565 940 60 –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) 7851 G23 7851 G24 7851 G25
Shutdown Quiescent Current vs Shutdown Quiescent Current vs Supply Voltage Temperature RUN Threshold vs Temperature
70 65 2.5 2.4 60 2.3 RISING 50 2.2 60 40 2.1 TAGE (V) 2.0 FALLING 30 1.9 55 20 1.8 RUN PIN VOL SHUTDOWN CURRENT (µA) SHUTDOWN CURRENT (µA) 1.7 10 1.6 0 50 1.5 0 1 2 3 4 5 6 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 SUPPLY VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 7851 G26 7851 G27 7851 G28
RUN Pull-Up Current vs TRACK/SS Current vs TRACK/SS TRACK/SS Pull-Up Current vs Temperature Voltage Temperature
2.2 0.5 3.0 2.9 2.0 0 2.8 –0.5 1.8 2.7 –1.0 1.6 2.6 –1.5 2.5 1.4 RUN PIN CURRENT (µA) –2.0 2.4 1.2 TRACK/SS PIN CURRENT (µA) TRACK/SS PIN CURRENT (µA) –2.5 2.3 1.0 –3.0 2.2 –50 –25 0 25 50 75 100 125 0 1 2 3 4 5 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TRACK/SS PIN VOLTAGE (V) TEMPERATURE (°C) 7851 G29 7851 G30 7851 G31 Rev A 8 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts