Datasheet LT8630 (Analog Devices) - 3

LT8630
e lecTrical 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
Feedback Bias Current VFB = 0.8V –25 –15 nA Feedback Voltage (VFBREF) VVOUT = 5V, ILOAD = 100mA l 796 808 820 mV Feedback Voltage Regulation VIN = 7V to 100V, ILOAD = 0.1A to 0.75A, VVOUT = 5V 792 808 824 mV Track/Soft-Start Source Current VFB = 0.9V, VTR/SS = 0 –6.5 –4.5 –2.5 µA Track/Soft-Start VOH VFB = 0.9V 2.9 3.0 3.4 V Track/Soft-Start Sink Current VFB = 0.7V, VTR/SS = 1V 15 30 45 µA Track/Soft-Start VOL VFB = 0V 50 75 mV Track/Soft-Start to Feedback Offset VTR/SS = 0.4V, VVOUT = 5V, ILOAD = 100mA –30 5 30 mV Track/Soft-Start Sink Current POR (Note 4) VFB = 0.9V, VTR/SS = 0.2V 180 230 µA PG Leakage Current VFB = 0V, VPG = 100V –200 0 200 nA PG Lower Threshold % of VFBREF (Note 5) VFB Rising l –11.5 –7.5 –4.5 % PG Upper Threshold % of VFBREF (Note 5) VFB Falling l 4.5 7.5 11.5 % PG Hysteresis 1.4 1.9 2.3 % PG Sink Current VFB = 0.7V, VPG = 0.2V 900 µA Minimum Switch ON Time VIN = 95V, VVOUT = 5V, ILOAD = 0A 150 ns Minimum Switch OFF Time VIN = 5V, VVOUT = 5V, ILOAD = 500mA, L = 15µH 2.1 µs IND to VOUT Peak Current (Note 6) VIN = 6V 1.6 2.0 2.7 A Maximum VOUT Current in Regulation VIN = 10V, VVOUT = 5V, L = 15µH 0.8 1.1 1.4 A VIN = 50V, VVOUT = 5V, L = 15µH l 0.6 0.9 2.0 A Switch Pin Leakage Current VSW = 0V, VIN = 100V, VEN = 0V 50 500 nA VSW = 100V, VIN = 100V, VEN = 0V 0.5 2.0 µA Top Switch On-Resistance 775 mΩ Bottom Switch On-Resistance 550 mΩ BST Pin Current VBST = 18V 180 µA BST Pin Threshold (Note 7) 2.4 V
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 LT8630EFE 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. LT8630IFE is guaranteed over the full –40°C to 125°C operating junction
Note 6:
The IND to VOUT peak current is defined as the maximum value of temperature range. current flowing from the IND pin to the VOUT during a switch cycle.
Note 3:
The LT8630 includes overtemperature protection that is intended
Note 7:
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 before the overtemperature circuitry below the threshold when the top switch is on, a minimum switch off becomes active. pulse will be generated. 8630f For more information www.linear.com/LT8630 3 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts