Datasheet LT3970 (Analog Devices) - 7
| 制造商 | Analog Devices |
| 描述 | 40V, 350mA Step-Down Regulator with 2.5μA Quiescent Current and Integrated Diodes |
| 页数 / 页 | 24 / 7 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. … |
| 修订版 | D |
| 文件格式/大小 | PDF / 706 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Minimum. Switch VCESAT (ISW = 200mA)
该数据表的模型线
- LT3970EDDB#TRMPBF LT3970EDDB#TRPBF LT3970EDDB-3.3#TRMPBF LT3970EDDB-3.3#TRPBF LT3970EDDB-3.42#TRMPBF LT3970EDDB-3.42#TRPBF LT3970EDDB-5#TRMPBF LT3970EDDB-5#TRPBF LT3970EMS#PBF LT3970EMS#TRPBF LT3970EMS#WPBF LT3970EMS#WTRPBF LT3970EMS-3.3#PBF LT3970EMS-3.3#TRPBF LT3970EMS-3.3#WPBF LT3970EMS-3.3#WTRPBF LT3970EMS-5#PBF LT3970EMS-5#TRPBF LT3970EMS-5#WPBF LT3970EMS-5#WTRPBF LT3970HMS#PBF LT3970HMS#TRPBF LT3970HMS#WPBF LT3970HMS#WTRPBF LT3970HMS-3.3#PBF LT3970HMS-3.3#TRPBF LT3970HMS-3.3#WPBF LT3970HMS-3.3#WTRPBF LT3970HMS-5#PBF LT3970HMS-5#TRPBF LT3970HMS-5#WPBF LT3970HMS-5#WTRPBF LT3970IDDB#TRMPBF LT3970IDDB#TRPBF LT3970IDDB-3.3#TRMPBF LT3970IDDB-3.3#TRPBF LT3970IDDB-5#TRMPBF LT3970IDDB-5#TRPBF LT3970IMS#PBF LT3970IMS#TRPBF LT3970IMS#WPBF LT3970IMS#WTRPBF LT3970IMS-3.3#PBF LT3970IMS-3.3#TRPBF LT3970IMS-3.3#WPBF LT3970IMS-3.3#WTRPBF LT3970IMS-5#PBF LT3970IMS-5#TRPBF LT3970IMS-5#WPBF LT3970IMS-5#WTRPBF
文件文字版本
LT3970 Series
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Minimum Switch VCESAT (ISW = 200mA) Switch On-Time/Switch Off-Time vs Temperature Switch VCESAT
200 250 400 LOAD CURRENT = 175mA 180 160 300 140 200 120 MINIMUM OFF-TIME (mV) (mV) T T 100 CESA CESA 200 80 MINIMUM ON-TIME 150 60 SWITCH V SWITCH V 100 40 SWITCH ON-TIME/SWITCH OFF-TIME (ns) 20 0 100 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 0 100 200 300 400 500 TEMPERATURE (°C) TEMPERATURE (°C) SWITCH CURRENT (mA) 3970 G16 3970 G17 3970 G18
Minimum Input Voltage, Minimum Input Voltage, BOOST Pin Current VOUT = 3.3V VOUT = 5V
16 5.0 6.5 FRONT PAGE APPLICATION FRONT PAGE APPLICATION V V 14 OUT = 3.3V OUT = 5V 4.5 6.0 12 TO START 4.0 5.5 10 TO START/RUN TO RUN 8 3.5 5.0 6 INPUT VOLTAGE (V) INPUT VOLTAGE (V) BOOST PIN CURRENT (mA) 3.0 4.5 4 2 2.5 4.0 0 100 200 300 400 500 0 50 100 150 200 250 300 350 0 50 100 150 200 250 300 350 SWITCH CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3970 G19 3970 G20 3970 G21
Boost Diode Forward Voltage Catch Diode Forward Voltage Catch Diode Leakage
1.2 1.0 20 VR = 12V 1.0 0.8 16 (V) F 0.8 (V) F 0.6 12 0.6 0.4 8 TCH DIODE V BOOST DIODE V 0.4 CA –50°C –50°C CATCH DIODE LEAKAGE (µA) 0.2 25°C 0.2 25°C 4 125°C 125°C 150°C 150°C 0 0 0 0 50 100 150 200 0 100 200 300 400 –50 –25 0 25 50 75 100 125 150 BOOST DIODE CURRENT (mA) CATCH DIODE CURRENT (mA) TEMPERATURE (°C) 3970 G22 3970 G23 3970 G24 Rev. D For more information www.analog.com 7 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Minimum Switch VCESAT (ISW = 200mA) Switch On-Time/Switch Off-Time vs Temperature Switch VCESAT
200 250 400 LOAD CURRENT = 175mA 180 160 300 140 200 120 MINIMUM OFF-TIME (mV) (mV) T T 100 CESA CESA 200 80 MINIMUM ON-TIME 150 60 SWITCH V SWITCH V 100 40 SWITCH ON-TIME/SWITCH OFF-TIME (ns) 20 0 100 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 0 100 200 300 400 500 TEMPERATURE (°C) TEMPERATURE (°C) SWITCH CURRENT (mA) 3970 G16 3970 G17 3970 G18
Minimum Input Voltage, Minimum Input Voltage, BOOST Pin Current VOUT = 3.3V VOUT = 5V
16 5.0 6.5 FRONT PAGE APPLICATION FRONT PAGE APPLICATION V V 14 OUT = 3.3V OUT = 5V 4.5 6.0 12 TO START 4.0 5.5 10 TO START/RUN TO RUN 8 3.5 5.0 6 INPUT VOLTAGE (V) INPUT VOLTAGE (V) BOOST PIN CURRENT (mA) 3.0 4.5 4 2 2.5 4.0 0 100 200 300 400 500 0 50 100 150 200 250 300 350 0 50 100 150 200 250 300 350 SWITCH CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3970 G19 3970 G20 3970 G21
Boost Diode Forward Voltage Catch Diode Forward Voltage Catch Diode Leakage
1.2 1.0 20 VR = 12V 1.0 0.8 16 (V) F 0.8 (V) F 0.6 12 0.6 0.4 8 TCH DIODE V BOOST DIODE V 0.4 CA –50°C –50°C CATCH DIODE LEAKAGE (µA) 0.2 25°C 0.2 25°C 4 125°C 125°C 150°C 150°C 0 0 0 0 50 100 150 200 0 100 200 300 400 –50 –25 0 25 50 75 100 125 150 BOOST DIODE CURRENT (mA) CATCH DIODE CURRENT (mA) TEMPERATURE (°C) 3970 G22 3970 G23 3970 G24 Rev. D For more information www.analog.com 7 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Related Parts