Datasheet LT8495 (Analog Devices) - 7
| 制造商 | Analog Devices |
| 描述 | SEPIC/Boost Converter with 2A, 70V Switch, 9μA Quiescent Current, POR and Watchdog Timer |
| 页数 / 页 | 34 / 7 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. … |
| 文件格式/大小 | PDF / 1.3 Mb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Watchdog Upper Boundary Period. Reset Timeout Period
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LT8495
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Watchdog Upper Boundary Period Reset Timeout Period Reset Timeout Period vs Capacitance vs Capacitance
12 100k 10k CPOR = 4.7nF TDK C2012COG1H472J (ms) 10k (ms) (ms) 1k 11 RST WDU RST 1k 100 10 100 Y PERIOD, t 10 10 9 1 RESET TIMEOUT PERIOD t 1 RESET TIMEOUT PERIOD, t UPPER BOUNDAR 8 0.1 0.1 –50 0 50 100 150 0.01 0.1 1 10 100 1000 0.01 0.1 1 10 100 1000 TEMPERATURE (°C) CWDT PIN CAPACITANCE, CWDT (nF) CPOR PIN CAPACITANCE, CPOR (nF) 8495 G19 8495 G20 8495 G21
Watchdog Lower Boundary Period vs Capacitance SWEN/RSTIN/WDE Pin Current FB Pin Current
1k 400 1000 350 (ms) 100 100 WDU 300 10 10 250 Y PERIOD, t 200 1 1 /WDE PIN CURRENT (nA) 150 0.1 RSTIN FB PIN CURRENT (µA) 100 0.1 0.01 50 LOWER BOUNDAR SWEN/ 0.01 0 0.001 0.01 0.1 1 10 100 1000 0 10 20 30 40 50 60 0 10 20 30 40 50 60 CWDT PIN CAPACITANCE, CWDT (nF) SWEN/RSTIN/WDE PIN VOLTAGE (V) FB VOLTAGE (V) 8495 G22 8495 G23 8495 G24
RST Output Voltage vs Supply Voltage Internal UVLO
2.50 10k PULL-UP FROM VIN TO RST 3 2.45 TAGE (V) V 2 TAGE (V) IN/BIAS RISING 2.40 VIN/BIAS FALLING OUTPUT VOL /BIAS VOL 1 V IN RST 2.35 0 2.30 0 1 2 3 –50 0 50 100 150 VIN/BIAS VOLTAGE (V) TEMPERATURE (°C) 8495 G25 8495 G26 8495fb For more information www.linear.com/LT8495 7 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Timing Diagrams Operation Applications Information Typical Applications Package Description Revision History Typical Applications Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Watchdog Upper Boundary Period Reset Timeout Period Reset Timeout Period vs Capacitance vs Capacitance
12 100k 10k CPOR = 4.7nF TDK C2012COG1H472J (ms) 10k (ms) (ms) 1k 11 RST WDU RST 1k 100 10 100 Y PERIOD, t 10 10 9 1 RESET TIMEOUT PERIOD t 1 RESET TIMEOUT PERIOD, t UPPER BOUNDAR 8 0.1 0.1 –50 0 50 100 150 0.01 0.1 1 10 100 1000 0.01 0.1 1 10 100 1000 TEMPERATURE (°C) CWDT PIN CAPACITANCE, CWDT (nF) CPOR PIN CAPACITANCE, CPOR (nF) 8495 G19 8495 G20 8495 G21
Watchdog Lower Boundary Period vs Capacitance SWEN/RSTIN/WDE Pin Current FB Pin Current
1k 400 1000 350 (ms) 100 100 WDU 300 10 10 250 Y PERIOD, t 200 1 1 /WDE PIN CURRENT (nA) 150 0.1 RSTIN FB PIN CURRENT (µA) 100 0.1 0.01 50 LOWER BOUNDAR SWEN/ 0.01 0 0.001 0.01 0.1 1 10 100 1000 0 10 20 30 40 50 60 0 10 20 30 40 50 60 CWDT PIN CAPACITANCE, CWDT (nF) SWEN/RSTIN/WDE PIN VOLTAGE (V) FB VOLTAGE (V) 8495 G22 8495 G23 8495 G24
RST Output Voltage vs Supply Voltage Internal UVLO
2.50 10k PULL-UP FROM VIN TO RST 3 2.45 TAGE (V) V 2 TAGE (V) IN/BIAS RISING 2.40 VIN/BIAS FALLING OUTPUT VOL /BIAS VOL 1 V IN RST 2.35 0 2.30 0 1 2 3 –50 0 50 100 150 VIN/BIAS VOLTAGE (V) TEMPERATURE (°C) 8495 G25 8495 G26 8495fb For more information www.linear.com/LT8495 7 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Timing Diagrams Operation Applications Information Typical Applications Package Description Revision History Typical Applications Related Parts