Datasheet LT8335 (Analog Devices) - 3
| Hersteller | Analog Devices |
| Beschreibung | Low IQ Boost/SEPIC/ Inverting Converter with 2A, 28V Switch |
| Seiten / Seite | 20 / 3 — ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply … |
| Dateiformat / Größe | PDF / 1.5 Mb |
| Dokumentensprache | Englisch |
ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply over the full operating
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LT8335
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, EN/UVLO = 12V unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Operating Voltage Range l 3 25 V VIN Quiescent Current at Shutdown VEN/UVLO = 0.2V 0.9 2 µA l 2 5 µA VEN/UVLO = 1.5V 2 5 µA l 3.6 9.5 µA VIN Quiescent Current Sleep Mode, Not Switching 5.5 10 µA l 8.5 15 µA Active Mode, Not Switching 780 1100 µA l 840 1200 µA
FBX Regulation
FBX Regulation Voltage FBX > 0V l 1.568 1.6 1.632 V FBX < 0V l –0.820 –0.80 –0.780 V FBX Line Regulation FBX > 0V, 3V < VIN < 25V 0.005 0.015 %/V FBX < 0V, 3V < VIN < 25V 0.005 0.015 %/V FBX Pin Current FBX = 1.6V, –0.8V l –10 10 nA
Oscillator
Switching Frequency (fOSC) l 1.80 2.0 2.20 MHz Minimum On-Time 74 115 ns Minimum Off-Time 47 65 ns
Switch
Maximum Switch Current Limit Threshold l 2.0 2.5 3.0 A Switch RDS(ON) ISW = 0.5A 170 mΩ Switch Leakage Current VSW = 28V 0.1 1 µA
EN/UVLO Logic
EN/UVLO Pin Threshold (Rising) Start Switching l 1.620 1.68 1.745 V EN/UVLO Pin Threshold (Falling) Stop Switching l 1.556 1.60 1.644 V EN/UVLO Pin Current VEN/UVLO = 1.6V l –40 40 nA
Soft-Start
Soft-Start Time 1.2 ms
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings LT8335I 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. High junction temperatures degrade operating Maximum Rating condition for extended periods may affect device lifetimes. Operating lifetime is derated at junction temperatures greater reliability and lifetime. than 125°C.
Note 2:
INTVCC cannot be externally driven. No additional components or
Note 4:
The IC includes overtemperature protection that is intended to loading is allowed on this pin. protect the device during overload conditions. Junction temperature will
Note 3:
The LT8335E is guaranteed to meet performance specifications exceed 150°C when overtemperature protection is active. Continuous from 0°C to 125°C junction temperature. Specifications over the –40°C operation above the specified maximum operating junction temperature to 125°C operating junction temperature range are assured by design, will reduce lifetime. characterization and correlation with statistical process controls. The 8335f For more information www.linear.com/LT8335 3
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, EN/UVLO = 12V unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Operating Voltage Range l 3 25 V VIN Quiescent Current at Shutdown VEN/UVLO = 0.2V 0.9 2 µA l 2 5 µA VEN/UVLO = 1.5V 2 5 µA l 3.6 9.5 µA VIN Quiescent Current Sleep Mode, Not Switching 5.5 10 µA l 8.5 15 µA Active Mode, Not Switching 780 1100 µA l 840 1200 µA
FBX Regulation
FBX Regulation Voltage FBX > 0V l 1.568 1.6 1.632 V FBX < 0V l –0.820 –0.80 –0.780 V FBX Line Regulation FBX > 0V, 3V < VIN < 25V 0.005 0.015 %/V FBX < 0V, 3V < VIN < 25V 0.005 0.015 %/V FBX Pin Current FBX = 1.6V, –0.8V l –10 10 nA
Oscillator
Switching Frequency (fOSC) l 1.80 2.0 2.20 MHz Minimum On-Time 74 115 ns Minimum Off-Time 47 65 ns
Switch
Maximum Switch Current Limit Threshold l 2.0 2.5 3.0 A Switch RDS(ON) ISW = 0.5A 170 mΩ Switch Leakage Current VSW = 28V 0.1 1 µA
EN/UVLO Logic
EN/UVLO Pin Threshold (Rising) Start Switching l 1.620 1.68 1.745 V EN/UVLO Pin Threshold (Falling) Stop Switching l 1.556 1.60 1.644 V EN/UVLO Pin Current VEN/UVLO = 1.6V l –40 40 nA
Soft-Start
Soft-Start Time 1.2 ms
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings LT8335I 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. High junction temperatures degrade operating Maximum Rating condition for extended periods may affect device lifetimes. Operating lifetime is derated at junction temperatures greater reliability and lifetime. than 125°C.
Note 2:
INTVCC cannot be externally driven. No additional components or
Note 4:
The IC includes overtemperature protection that is intended to loading is allowed on this pin. protect the device during overload conditions. Junction temperature will
Note 3:
The LT8335E is guaranteed to meet performance specifications exceed 150°C when overtemperature protection is active. Continuous from 0°C to 125°C junction temperature. Specifications over the –40°C operation above the specified maximum operating junction temperature to 125°C operating junction temperature range are assured by design, will reduce lifetime. characterization and correlation with statistical process controls. The 8335f For more information www.linear.com/LT8335 3