Datasheet LT3688 (Analog Devices) - 7
| 制造商 | Analog Devices |
| 描述 | Dual 800mA Step-Down Switching Regulator with Power-On Reset and Watchdog Timer |
| 页数 / 页 | 28 / 7 — TYPICAL PERFORMANCE CHARACTERISTICS. TA = 25°C unless otherwise noted. … |
| 文件格式/大小 | PDF / 430 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. TA = 25°C unless otherwise noted. Power-On Reset Threshold. Typical Transient Duration
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LT3688
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. Power-On Reset Threshold Typical Transient Duration Watchdog Window Mode Period vs Temperature vs Comparator Overdrive vs Temperature
0.730 700 25 600 CWDT = 1000pF 20 0.725 500 Y (μs) 400 15 (V) 0.720 (ms) UV V 300 t WDU 10 RESET DELA 200 0.715 5 100 0.710 0 0 –50 –25 0 25 50 75 100 125 150 0.1 1 10 100 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) OVERDRIVE VOLTAGE (% of VUV) TEMPERATURE (°C) 3688 G23 3688 G24 3688 G26
Reset Timeout Period (tRST) Reset Timeout Period (tRST) vs Temperature vs Capacitance
30 100000 25 C 10000 POR = 4700pF 1000 20 100 (ms) 15 (ms) t RST t RST 10 10 1 5 0.1 0 0.01 –50 –25 0 25 50 75 100 125 150 0.001 0.1 10 1000 100000 TEMPERATURE (°C) CPOR (nF) 3688 G27 3688 G28
Watchdog Window Lower Watchdog Window Upper Boundary (tWDL) vs Capacitance Boundary (tWDU) vs Capacitance
100000 100000 10000 10000 1000 1000 100 (ms) (ms) 100 t WDL 10 t WDU 10 1 1 0.1 0.01 0.1 0.001 0.1 10 1000 100000 0.001 0.1 10 1000 100000 CWDT (nF) CWDT (nF) 3688 G29 3688 G30 3688f 7
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. Power-On Reset Threshold Typical Transient Duration Watchdog Window Mode Period vs Temperature vs Comparator Overdrive vs Temperature
0.730 700 25 600 CWDT = 1000pF 20 0.725 500 Y (μs) 400 15 (V) 0.720 (ms) UV V 300 t WDU 10 RESET DELA 200 0.715 5 100 0.710 0 0 –50 –25 0 25 50 75 100 125 150 0.1 1 10 100 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) OVERDRIVE VOLTAGE (% of VUV) TEMPERATURE (°C) 3688 G23 3688 G24 3688 G26
Reset Timeout Period (tRST) Reset Timeout Period (tRST) vs Temperature vs Capacitance
30 100000 25 C 10000 POR = 4700pF 1000 20 100 (ms) 15 (ms) t RST t RST 10 10 1 5 0.1 0 0.01 –50 –25 0 25 50 75 100 125 150 0.001 0.1 10 1000 100000 TEMPERATURE (°C) CPOR (nF) 3688 G27 3688 G28
Watchdog Window Lower Watchdog Window Upper Boundary (tWDL) vs Capacitance Boundary (tWDU) vs Capacitance
100000 100000 10000 10000 1000 1000 100 (ms) (ms) 100 t WDL 10 t WDU 10 1 1 0.1 0.01 0.1 0.001 0.1 10 1000 100000 0.001 0.1 10 1000 100000 CWDT (nF) CWDT (nF) 3688 G29 3688 G30 3688f 7