Datasheet LTC7812 (Analog Devices) - 10
| 制造商 | Analog Devices |
| 描述 | Low IQ, 38V Synchronous Boost+Buck Controller |
| 页数 / 页 | 44 / 10 — TYPICAL PERFORMANCE CHARACTERISTICS. Undervoltage Lockout Threshold. … |
| 文件格式/大小 | PDF / 2.3 Mb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. Undervoltage Lockout Threshold. Shutdown (RUN) Threshold. vs Temperature
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LTC7812
TYPICAL PERFORMANCE CHARACTERISTICS Undervoltage Lockout Threshold Shutdown (RUN) Threshold vs Temperature vs Temperature
4.4 1.40 4.3 1.35 4.2 RISING 1.30 RUN2 RISING 4.1 1.25 RUN1 RISING 4.0 TAGE (V) TAGE (V) 3.9 1.20 VOL FALLING RUN2 FALLING V CC 3.8 1.15 INT 3.7 RUN PIN VOL RUN1 FALLING 1.10 3.6 1.05 3.5 3.4 1.00 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) 7812 G36 7812 G37
Charge Pump Charging Current Charge Pump Charging Current vs Operating Frequency vs Switch Voltage
100 100 VBOOST2 = 16V VBOOST2 – VSW2 = 4V 90 VSW2 = 12V 90 80 –55°C 80 FREQ = 0V 70 25°C 70 FREQ = INTV 60 60 CC 50 50 40 150°C 40 30 30 20 20 10 10 CHARGE PUMP CHARGING CURRENT (µA) CHARGE PUMP CHARGING CURRENT (µA) 0 0 100 200 300 400 500 600 700 800 5 10 15 20 25 30 35 40 OPERATING FREQUENCY (kHz) SWITCH VOLTAGE (V) 7812 G38 7812 G39 7812fc 10 For more information www.linear.com/LTC7812 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Undervoltage Lockout Threshold Shutdown (RUN) Threshold vs Temperature vs Temperature
4.4 1.40 4.3 1.35 4.2 RISING 1.30 RUN2 RISING 4.1 1.25 RUN1 RISING 4.0 TAGE (V) TAGE (V) 3.9 1.20 VOL FALLING RUN2 FALLING V CC 3.8 1.15 INT 3.7 RUN PIN VOL RUN1 FALLING 1.10 3.6 1.05 3.5 3.4 1.00 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) 7812 G36 7812 G37
Charge Pump Charging Current Charge Pump Charging Current vs Operating Frequency vs Switch Voltage
100 100 VBOOST2 = 16V VBOOST2 – VSW2 = 4V 90 VSW2 = 12V 90 80 –55°C 80 FREQ = 0V 70 25°C 70 FREQ = INTV 60 60 CC 50 50 40 150°C 40 30 30 20 20 10 10 CHARGE PUMP CHARGING CURRENT (µA) CHARGE PUMP CHARGING CURRENT (µA) 0 0 100 200 300 400 500 600 700 800 5 10 15 20 25 30 35 40 OPERATING FREQUENCY (kHz) SWITCH VOLTAGE (V) 7812 G38 7812 G39 7812fc 10 For more information www.linear.com/LTC7812 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Typical Application Related Parts