Datasheet LT3480 (Analog Devices) - 3
| 制造商 | Analog Devices |
| 描述 | 36V, 2A, 2.4MHz Step-Down Switching Regulator with 70µA Quiescent Current |
| 页数 / 页 | 24 / 3 — ELECTRICAL CHARACTERISTICS The. denotes the specifications which apply … |
| 文件格式/大小 | PDF / 388 Kb |
| 文件语言 | 英语 |
ELECTRICAL CHARACTERISTICS The. denotes the specifications which apply over the full operating temperature
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LT3480
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 10V, VRUN/SS = 10V, VBOOST = 15V, VBD = 3.3V unless otherwise noted. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage l 3 3.6 V VIN Overvoltage Lockout l 36 38 40 V Quiescent Current from VIN VRUN/SS = 0.2V 0.01 0.5 µA VBD = 3V, Not Switching l 30 100 µA VBD = 0, Not Switching 105 160 µA Quiescent Current from BD VRUN/SS = 0.2V 0.01 0.5 µA VBD = 3V, Not Switching l 80 120 µA VBD = 0, Not Switching 1 5 µA Minimum Bias Voltage (BD Pin) 2.7 3 V Feedback Voltage 780 790 800 mV l 775 790 805 mV FB Pin Bias Current (Note 3) VFB = 0.8V, VC = 0.4V l 7 30 nA FB Voltage Line Regulation 4V < VIN < 36V 0.002 0.01 %/V Error Amp gm 400 µMho Error Amp Gain 1000 VC Source Current 45 µA VC Sink Current 45 µA VC Pin to Switch Current Gain 3.5 A/V VC Clamp Voltage 2 V Switching Frequency RT = 8.66k 2.1 2.4 2.7 MHz RT = 29.4k 0.9 1 1.15 MHz RT = 187k 160 200 240 kHz Minimum Switch Off-Time l 60 150 nS Switch Current Limit Duty Cycle = 5% 3 3.5 4 A Switch VCESAT ISW = 2A 500 mV Boost Schottky Reverse Leakage VBD = 0V 0.02 2 µA Minimum Boost Voltage (Note 4) l 1.5 2.1 V BOOST Pin Current ISW = 1A 22 35 mA RUN/SS Pin Current VRUN/SS = 2.5V 5 10 µA RUN/SS Input Voltage High 2.5 V RUN/SS Input Voltage Low 0.2 V PG Threshold Offset from Feedback Voltage VFB Rising 100 mV PG Hysteresis 12 mV PG Leakage VPG = 5V 0.1 1 µA PG Sink Current VPG = 0.4V l 100 600 µA SYNC Low Threshold 0.5 V SYNC High Threshold 0.7 V SYNC Pin Bias Current VSYNC = 0V 0.1 µA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 2:
The LT3480E is guaranteed to meet performance specifications may cause permanent damage to the device. Exposure to any Absolute from 0°C to 125°C. Specifications over the –40°C to 125°C operating Maximum Rating condition for extended periods may affect device temperature range are assured by design, characterization and correlation reliability and lifetime. with statistical process controls. The LT3480I specifications are 3480fe For more information www.linear.com/LT3480 3 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 10V, VRUN/SS = 10V, VBOOST = 15V, VBD = 3.3V unless otherwise noted. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage l 3 3.6 V VIN Overvoltage Lockout l 36 38 40 V Quiescent Current from VIN VRUN/SS = 0.2V 0.01 0.5 µA VBD = 3V, Not Switching l 30 100 µA VBD = 0, Not Switching 105 160 µA Quiescent Current from BD VRUN/SS = 0.2V 0.01 0.5 µA VBD = 3V, Not Switching l 80 120 µA VBD = 0, Not Switching 1 5 µA Minimum Bias Voltage (BD Pin) 2.7 3 V Feedback Voltage 780 790 800 mV l 775 790 805 mV FB Pin Bias Current (Note 3) VFB = 0.8V, VC = 0.4V l 7 30 nA FB Voltage Line Regulation 4V < VIN < 36V 0.002 0.01 %/V Error Amp gm 400 µMho Error Amp Gain 1000 VC Source Current 45 µA VC Sink Current 45 µA VC Pin to Switch Current Gain 3.5 A/V VC Clamp Voltage 2 V Switching Frequency RT = 8.66k 2.1 2.4 2.7 MHz RT = 29.4k 0.9 1 1.15 MHz RT = 187k 160 200 240 kHz Minimum Switch Off-Time l 60 150 nS Switch Current Limit Duty Cycle = 5% 3 3.5 4 A Switch VCESAT ISW = 2A 500 mV Boost Schottky Reverse Leakage VBD = 0V 0.02 2 µA Minimum Boost Voltage (Note 4) l 1.5 2.1 V BOOST Pin Current ISW = 1A 22 35 mA RUN/SS Pin Current VRUN/SS = 2.5V 5 10 µA RUN/SS Input Voltage High 2.5 V RUN/SS Input Voltage Low 0.2 V PG Threshold Offset from Feedback Voltage VFB Rising 100 mV PG Hysteresis 12 mV PG Leakage VPG = 5V 0.1 1 µA PG Sink Current VPG = 0.4V l 100 600 µA SYNC Low Threshold 0.5 V SYNC High Threshold 0.7 V SYNC Pin Bias Current VSYNC = 0V 0.1 µA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 2:
The LT3480E is guaranteed to meet performance specifications may cause permanent damage to the device. Exposure to any Absolute from 0°C to 125°C. Specifications over the –40°C to 125°C operating Maximum Rating condition for extended periods may affect device temperature range are assured by design, characterization and correlation reliability and lifetime. with statistical process controls. The LT3480I specifications are 3480fe For more information www.linear.com/LT3480 3 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts