Datasheet LT3800 (Analog Devices) - 4
| Fabricante | Analog Devices |
| Descripción | High-Voltage Synchronous Current Mode Step-Down Controller |
| Páginas / Página | 24 / 4 — ELECTRICAL CHARACTERISTICS. Note 1:. Note 4:. Note 2:. Note 5:. Note 6:. … |
| Formato / tamaño de archivo | PDF / 265 Kb |
| Idioma del documento | Inglés |
ELECTRICAL CHARACTERISTICS. Note 1:. Note 4:. Note 2:. Note 5:. Note 6:. Note 7:. Note 3:. TYPICAL PERFORMANCE CHARACTERISTICS
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LT3800
ELECTRICAL CHARACTERISTICS Note 1:
Stresses beyond those listed under Absolute Maximum Ratings LT3800I is guaranteed over the full –40°C to 125°C operating junction may cause permanent damage to the device. Exposure to any Absolute temperature range. Maximum Rating condition for extended periods may affect device
Note 4:
VIN voltages below the start-up threshold (7.5V) are only reliability and lifetime. supported when VCC is externally driven above 6.5V.
Note 2:
This IC includes overtemperature protection that is intended
Note 5:
Operating range dictated by MOSFET absolute maximum gate- to protect the device during momentary overload conditions. Junction source voltage ratings. temperature will exceed 125°C when overtemperature protection is active.
Note 6:
Supply current specifi cation does not include switch drive Continuous operation above the specifi ed maximum operating junction currents. Actual supply currents will be higher. temperature may impair device reliability.
Note 7:
DC measurement of gate drive output “ON” voltage is typically
Note 3:
The LT3800E is guaranteed to meet performance specifi cations 8.6V. Internal dynamic bootstrap operation yields typical gate “ON” from 0°C to 125°C junction temperature. Specifi cations over the –40°C voltages of 9.8V during standard switching operation. Standard operation to 125°C operating junction temperature range are assured by design, gate “ON” voltage is not tested but guaranteed by design. characterization and correlation with statistical process controls. The
TYPICAL PERFORMANCE CHARACTERISTICS Shutdown Threshold (Rising) Shutdown Threshold (Falling) vs Temperature vs Temperature VCC vs Temperature
1.37 1.240 8.1 ICC = 0mA 1.36 1.235 ALLING (V) 8.0 1.35 1.230 (V) CC ICC = 20mA V 7.9 1.34 1.225 SHUTDOWN THRESHOLD, RISING (V) SHUTDOWN THRESHOLD, F 1.33 1.220 7.8 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3800 G01 3800 G02 3800 G03
VCC vs ICC(LOAD) VCC vs VIN ICC Current Limit vs Temperature
8.05 8 200 T I A = 25°C CC = 20mA TA = 25°C 175 7 8.00 150 6 (V) (V) 7.95 125 CC CC V V 5 100 CURRENT LIMIT (mA) 7.90 I CC 4 75 7.85 3 50 0 5 10 15 20 25 30 35 40 4 5 6 7 8 9 10 11 12 –50 –25 0 25 50 75 100 125 ICC(LOAD) (mA) VIN (V) TEMPERATURE (°C) 3800 G04 3800 G05 3800 G06 3800fc 4 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS FUNCTIONAL DIAGRAM APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS
ELECTRICAL CHARACTERISTICS Note 1:
Stresses beyond those listed under Absolute Maximum Ratings LT3800I is guaranteed over the full –40°C to 125°C operating junction may cause permanent damage to the device. Exposure to any Absolute temperature range. Maximum Rating condition for extended periods may affect device
Note 4:
VIN voltages below the start-up threshold (7.5V) are only reliability and lifetime. supported when VCC is externally driven above 6.5V.
Note 2:
This IC includes overtemperature protection that is intended
Note 5:
Operating range dictated by MOSFET absolute maximum gate- to protect the device during momentary overload conditions. Junction source voltage ratings. temperature will exceed 125°C when overtemperature protection is active.
Note 6:
Supply current specifi cation does not include switch drive Continuous operation above the specifi ed maximum operating junction currents. Actual supply currents will be higher. temperature may impair device reliability.
Note 7:
DC measurement of gate drive output “ON” voltage is typically
Note 3:
The LT3800E is guaranteed to meet performance specifi cations 8.6V. Internal dynamic bootstrap operation yields typical gate “ON” from 0°C to 125°C junction temperature. Specifi cations over the –40°C voltages of 9.8V during standard switching operation. Standard operation to 125°C operating junction temperature range are assured by design, gate “ON” voltage is not tested but guaranteed by design. characterization and correlation with statistical process controls. The
TYPICAL PERFORMANCE CHARACTERISTICS Shutdown Threshold (Rising) Shutdown Threshold (Falling) vs Temperature vs Temperature VCC vs Temperature
1.37 1.240 8.1 ICC = 0mA 1.36 1.235 ALLING (V) 8.0 1.35 1.230 (V) CC ICC = 20mA V 7.9 1.34 1.225 SHUTDOWN THRESHOLD, RISING (V) SHUTDOWN THRESHOLD, F 1.33 1.220 7.8 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3800 G01 3800 G02 3800 G03
VCC vs ICC(LOAD) VCC vs VIN ICC Current Limit vs Temperature
8.05 8 200 T I A = 25°C CC = 20mA TA = 25°C 175 7 8.00 150 6 (V) (V) 7.95 125 CC CC V V 5 100 CURRENT LIMIT (mA) 7.90 I CC 4 75 7.85 3 50 0 5 10 15 20 25 30 35 40 4 5 6 7 8 9 10 11 12 –50 –25 0 25 50 75 100 125 ICC(LOAD) (mA) VIN (V) TEMPERATURE (°C) 3800 G04 3800 G05 3800 G06 3800fc 4 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS FUNCTIONAL DIAGRAM APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS