Datasheet LT3840 (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | Wide Input Range Synchronous Regulator Controller with Accurate Current Limit |
| 页数 / 页 | 24 / 4 — e lecTrical characTerisTics The. denotes the specifications which apply … |
| 文件格式/大小 | PDF / 292 Kb |
| 文件语言 | 英语 |
e lecTrical characTerisTics The. denotes the specifications which apply over the full operating
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LT3840
e lecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. PARAMETER CONDITIONS MIN TYP MAX UNITS Power Good
PG Threshold as a Percentage of VFB VFB Rising l 87 90 93 % PG Hysteresis as a Percentage of VFB 2.5 % PG Leakage VPG = 5V 0.1 1 µA PG Sink Current VPG = 0.3V l 35 65 µA
MOSFET Gate Drivers
Non-Overlap Time TG to BG 75 ns Non-Overlap Time BG to TG 75 ns TG Minimum On Time 150 ns TG Minimum Off Time 240 ns TG Maximum Duty Cycle RT = 49.9k 99 % TG, BG Drive On Voltage 7.5 V TG, BG Drive Off Voltage 5 mV TG, BG Drive Rise Time CTG = CBG = 3300pF 20 ns TG, BG Drive Fall Time CTG = CBG = 3300pF 20 ns BOOST UVLO (Rising) VBOOST - VSW 4.5 5.3 V BOOST UVLO Hysteresis 350 mV
Internal Auxiliary Supply
INTVCC Regulation Voltage l 7.25 7.5 7.75 V INTVCC UVLO Threshold (Rising) 6.25 6.5 6.75 V INTVCC UVLO Hysteresis 300 mV INTVCC Current in Shutdown VEN = 0.3V 6 µA INTVCC Output Current 2.5V ≤ VIN ≤ 60V (Note 4) l 100 mA INTVCC Burst Mode Current VMODE = 0V 60 µA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings temperature range. The LT3840H is guaranteed over the full –40°C to may cause permanent damage to the device. Exposure to any Absolute 150°C operating junction temperature range. The LT3840MP is 100% Maximum Rating condition for extended periods may affect device tested and guaranteed over the –55°C to 150°C temperature range. High reliability and lifetime. junction temperatures degrade operating lifetimes; Operating lifetime is
Note 2:
The LT3840E is guaranteed to meet performance specifications derated for junction temperatures greater than 125°C. from 0°C to 125°C junction temperature. Specifications over the –40°C
Note 3:
Supply current specification does not include switch drive to 125°C operating junction temperature range are assured by design, currents. Actual supply currents will be higher. characterization, and correlation with statistical process controls. The
Note 4:
Specification is not tested but is guaranteed by design, LT3840I is guaranteed over the –40°C to 125°C operating junction characterization and correlation with statistical process controls. 3840fa 4 For more information www.linear.com/LT3840 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
e lecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. PARAMETER CONDITIONS MIN TYP MAX UNITS Power Good
PG Threshold as a Percentage of VFB VFB Rising l 87 90 93 % PG Hysteresis as a Percentage of VFB 2.5 % PG Leakage VPG = 5V 0.1 1 µA PG Sink Current VPG = 0.3V l 35 65 µA
MOSFET Gate Drivers
Non-Overlap Time TG to BG 75 ns Non-Overlap Time BG to TG 75 ns TG Minimum On Time 150 ns TG Minimum Off Time 240 ns TG Maximum Duty Cycle RT = 49.9k 99 % TG, BG Drive On Voltage 7.5 V TG, BG Drive Off Voltage 5 mV TG, BG Drive Rise Time CTG = CBG = 3300pF 20 ns TG, BG Drive Fall Time CTG = CBG = 3300pF 20 ns BOOST UVLO (Rising) VBOOST - VSW 4.5 5.3 V BOOST UVLO Hysteresis 350 mV
Internal Auxiliary Supply
INTVCC Regulation Voltage l 7.25 7.5 7.75 V INTVCC UVLO Threshold (Rising) 6.25 6.5 6.75 V INTVCC UVLO Hysteresis 300 mV INTVCC Current in Shutdown VEN = 0.3V 6 µA INTVCC Output Current 2.5V ≤ VIN ≤ 60V (Note 4) l 100 mA INTVCC Burst Mode Current VMODE = 0V 60 µA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings temperature range. The LT3840H is guaranteed over the full –40°C to may cause permanent damage to the device. Exposure to any Absolute 150°C operating junction temperature range. The LT3840MP is 100% Maximum Rating condition for extended periods may affect device tested and guaranteed over the –55°C to 150°C temperature range. High reliability and lifetime. junction temperatures degrade operating lifetimes; Operating lifetime is
Note 2:
The LT3840E is guaranteed to meet performance specifications derated for junction temperatures greater than 125°C. from 0°C to 125°C junction temperature. Specifications over the –40°C
Note 3:
Supply current specification does not include switch drive to 125°C operating junction temperature range are assured by design, currents. Actual supply currents will be higher. characterization, and correlation with statistical process controls. The
Note 4:
Specification is not tested but is guaranteed by design, LT3840I is guaranteed over the –40°C to 125°C operating junction characterization and correlation with statistical process controls. 3840fa 4 For more information www.linear.com/LT3840 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