Datasheet LT3840 (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | Wide Input Range Synchronous Regulator Controller with Accurate Current Limit |
| 页数 / 页 | 24 / 5 — Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. EN … |
| 文件格式/大小 | PDF / 292 Kb |
| 文件语言 | 英语 |
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. EN Threshold Voltage vs. UVLO Threshold Voltage vs
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LT3840
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. EN Threshold Voltage vs UVLO Threshold Voltage vs Temperature Temperature OVLO Threshold vs Temperature
1.40 1.40 1.30 1.35 1.35 OVLO RISING 1.25 1.30 1.30 EN RISING UVLO RISING 1.20 1.25 1.25 1.20 1.20 1.15 OVLO FALLING TAGE (V) TAGE (V) TAGE (V) EN FALLING UVLO FALLING 1.15 1.15 1.10 1.10 1.10 1.05 EN PIN VOL 1.05 UVLO PIN VOL 1.05 OVLO PIN VOL 1.00 1.00 1.00 95 95 0.95 90 90 0.90 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3840 G01 3840 G02 3840 G03
INTVCC Regulation Voltage vs Shutdown Current vs Temperature Temperature ISENSE+ + ISENSE– vs VSENSE(CM)
20 7.7 1600 18 7.6 1200 16 14 TAGE (V) 7.5 800 12 7.4 10 TION VOL 400 – BIAS CURRENT (µA) 7.3 8 0 6 REGULA 7.2 V SHUTDOWN CURRENT (µA) IN V CC + + SENSE 4 AUXVIN INT –400 7.1 2 SENSE 0 7.0 –800 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 0 1 2 3 4 5 TEMPERATURE (°C) TEMPERATURE (°C) COMMON MODE SENSE VOLTAGE (V) 3840 G04 3840 G05 3840 G06
Switching Frequency vs Soft-Start (TK/SS) Current vs Regulated FB Voltage vs Temperature Temperature Temperature
330 12 1.28 RT = 49.9k 320 11 1.27 TAGE (V) 310 10 1.26 300 9 1.25 290 8 1.24 TK/SS CURRENT (µA) TED FEEDBACK VOL SWITCHING FREQUENCY (kHz) 280 7 1.23 REGULA 270 6 1.22 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3840 G07 3840 G08 3840 G09 3840fa For more information www.linear.com/LT3840 5 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. EN Threshold Voltage vs UVLO Threshold Voltage vs Temperature Temperature OVLO Threshold vs Temperature
1.40 1.40 1.30 1.35 1.35 OVLO RISING 1.25 1.30 1.30 EN RISING UVLO RISING 1.20 1.25 1.25 1.20 1.20 1.15 OVLO FALLING TAGE (V) TAGE (V) TAGE (V) EN FALLING UVLO FALLING 1.15 1.15 1.10 1.10 1.10 1.05 EN PIN VOL 1.05 UVLO PIN VOL 1.05 OVLO PIN VOL 1.00 1.00 1.00 95 95 0.95 90 90 0.90 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3840 G01 3840 G02 3840 G03
INTVCC Regulation Voltage vs Shutdown Current vs Temperature Temperature ISENSE+ + ISENSE– vs VSENSE(CM)
20 7.7 1600 18 7.6 1200 16 14 TAGE (V) 7.5 800 12 7.4 10 TION VOL 400 – BIAS CURRENT (µA) 7.3 8 0 6 REGULA 7.2 V SHUTDOWN CURRENT (µA) IN V CC + + SENSE 4 AUXVIN INT –400 7.1 2 SENSE 0 7.0 –800 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 0 1 2 3 4 5 TEMPERATURE (°C) TEMPERATURE (°C) COMMON MODE SENSE VOLTAGE (V) 3840 G04 3840 G05 3840 G06
Switching Frequency vs Soft-Start (TK/SS) Current vs Regulated FB Voltage vs Temperature Temperature Temperature
330 12 1.28 RT = 49.9k 320 11 1.27 TAGE (V) 310 10 1.26 300 9 1.25 290 8 1.24 TK/SS CURRENT (µA) TED FEEDBACK VOL SWITCHING FREQUENCY (kHz) 280 7 1.23 REGULA 270 6 1.22 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3840 G07 3840 G08 3840 G09 3840fa For more information www.linear.com/LT3840 5 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts