Datasheet LT8631 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | 100V, 1A Synchronous Micropower Step-Down Regulator |
| Pages / Page | 26 / 4 — ELECTRICAL. CHARACTERISTICS The. denotes the specifications which apply … |
| File Format / Size | PDF / 375 Kb |
| Document Language | English |
ELECTRICAL. CHARACTERISTICS The. denotes the specifications which apply over the full operating
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LT8631
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TJ = 25°C. VIN = 15V, VEN/UV = 2V, unless otherwise specified. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
BST Pin Threshold (Note 8) 2.4 V SYNC/MODE Pin Current VSYNC/MODE = 3V 2 3.4 5.5 µA SYNC/MODE Threshold 1.0 1.5 2.0 V Synchronization Range 100 1000 kHz
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 4:
An internal power on reset (POR) latch is set on the positive may cause permanent damage to the device. Exposure to any Absolute transition of the EN/UV pin through its threshold or thermal shutdown. Maximum Rating condition for extended periods may affect device The output of the latch activates a current source on the TR/SS pin which reliability and lifetime. typically sinks 230µA while discharging the TR/SS capacitor. The latch is
Note 2:
The LT8631EFE is guaranteed to meet performance specifications reset when the TR/SS pin is driven below the soft-start POR threshold or from 0°C to 125°C junction temperature. Specifications over the –40°C the EN/UV pin is taken below its threshold. to 125°C operating junction temperature range are assured by design,
Note 5:
The threshold is expressed as a percentage of the feedback characterization and correlation with statistical process controls. The reference voltage. LT8631IFE is guaranteed over the full –40°C to 125°C operating junction
Note 6:
The IND to VOUT burst current is defined as the maximum value of temperature range. The LT8631HFE is guaranteed over the full –40°C to current flowing from the IND pin to the VOUT during a switch cycle when 150°C operating junction temperature range. High junction temperatures operating in Burst Mode. degrade operating lifetimes. Operating lifetime is derated at junction
Note 7:
The IND to V temperatures greater than 125°C. OUT peak current is defined as the maximum value of current flowing from the IND pin to the VOUT during a switch cycle.
Note 3:
The LT8631 includes overtemperature protection that is intended
Note 8:
The BST pin threshold is defined as the minimum voltage between to protect the device during thermal overload conditions. Internal junction the BST and SW pins to keep the top switch on. If the the voltage falls temperature will exceed 150°C when the overtemperature circuitry is below the threshold when the top switch is on, a minimum switch off active. pulse will be generated. 8631fb 4 For more information www.linear.com/LT8631
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TJ = 25°C. VIN = 15V, VEN/UV = 2V, unless otherwise specified. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
BST Pin Threshold (Note 8) 2.4 V SYNC/MODE Pin Current VSYNC/MODE = 3V 2 3.4 5.5 µA SYNC/MODE Threshold 1.0 1.5 2.0 V Synchronization Range 100 1000 kHz
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 4:
An internal power on reset (POR) latch is set on the positive may cause permanent damage to the device. Exposure to any Absolute transition of the EN/UV pin through its threshold or thermal shutdown. Maximum Rating condition for extended periods may affect device The output of the latch activates a current source on the TR/SS pin which reliability and lifetime. typically sinks 230µA while discharging the TR/SS capacitor. The latch is
Note 2:
The LT8631EFE is guaranteed to meet performance specifications reset when the TR/SS pin is driven below the soft-start POR threshold or from 0°C to 125°C junction temperature. Specifications over the –40°C the EN/UV pin is taken below its threshold. to 125°C operating junction temperature range are assured by design,
Note 5:
The threshold is expressed as a percentage of the feedback characterization and correlation with statistical process controls. The reference voltage. LT8631IFE is guaranteed over the full –40°C to 125°C operating junction
Note 6:
The IND to VOUT burst current is defined as the maximum value of temperature range. The LT8631HFE is guaranteed over the full –40°C to current flowing from the IND pin to the VOUT during a switch cycle when 150°C operating junction temperature range. High junction temperatures operating in Burst Mode. degrade operating lifetimes. Operating lifetime is derated at junction
Note 7:
The IND to V temperatures greater than 125°C. OUT peak current is defined as the maximum value of current flowing from the IND pin to the VOUT during a switch cycle.
Note 3:
The LT8631 includes overtemperature protection that is intended
Note 8:
The BST pin threshold is defined as the minimum voltage between to protect the device during thermal overload conditions. Internal junction the BST and SW pins to keep the top switch on. If the the voltage falls temperature will exceed 150°C when the overtemperature circuitry is below the threshold when the top switch is on, a minimum switch off active. pulse will be generated. 8631fb 4 For more information www.linear.com/LT8631
