Datasheet LT8603 (Analog Devices) - 5

LT8603
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 = 3V unless otherwise noted. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS Channel 4
Feedback Voltage FB4 E-, I-Grade l 788 800 812 mV J-Grade l 784 800 812 mV FB4 Line Regulation VIN = 3.2V to 42V 0.002 0.01 %/V Input Current FB4 l –100 100 nA Soft-Start Time 1 ms Current Comparator Limit Threshold VISP4 to VISN4, VCM = 2V to 42V, E, I-Grade l 43 50 57 mV VISP4 to VISN4, VCM = 2V to 42V, J-Grade l 41 50 57 mV Current Comparator Input Common Mode Range 2 42 V ISP4, ISN4 Input Currents, Sleep VISP4 = VISN4 = 2V to 42V, FB4 = 1V, SYNC = 0V 200 nA ISP4, ISN4 Input Currents, Active VISP4 = VISN4 = 2V to 42V, FB4 = 0V, SYNC = 0V 34 44 μA ISP4, ISN4 Input Currents VISP4 = VISN4 = –42V 7 10 mA GATE4 High Side PMOS On-Resistance 2.5 Ω GATE4 Low Side NMOS On-Resistance 1.25 Ω FB4 Power Good Threshold Percentage of VFB4, VFB4 Falling l 89 92 95 % Power Good Threshold Hysteresis 0.2 % PG4 Output Voltage Low IPG4 = 350μA l 0.13 0.3 V PG4 Leakage Current PG4 = 5V, FB4 = 0.8V l 6 μA
Power-On Reset
POR Delay Time CPOR = 1000pF l 31 35.2 39.4 ms RST Output Voltage Low IRST = 100μA l 0.1 0.2 V RST Pull-Up Current POR Timed Out, RST = 0V 20 μA RST Leakage Current POR Timed Out, RST = 6V –100 100 nA POREN Threshold l 1.15 1.2 1.25 V POREN Pull-Up Current POREN = 0V 0.6 1.0 1.4 μA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings temperatures degrade operating lifetimes. Operating lifetime is derated at may cause permanent damage to the device. Exposure to any Absolute junction temperatures above 125°C. Maximum Rating condition for extended periods may affect device
Note 3:
Current limit is assured by design and/or correlation to static test. reliability and lifetime. Slope compensation reduces current limit at higher duty cycles.
Note 2:
The LT8603E is guaranteed to meet performance specifications
Note 4:
Measurement made using the circuit titled, “Details of Front Page from 0°C to 125°C junction temperature. Specifications over the –40°C Application” in the Typical Applications section. to 125°C operating junction temperature range are assured by design,
Note 5:
This IC includes overtemperature protection that is intended to characterization and correlation with statistical process controls. The protect the device during overload conditions. Junction temperature will LT8603I is guaranteed to meet performance specifications from –40°C exceed 150°C when overtemperature protection is active. Continuous to 125°C junction temperature. The LT8603J is guaranteed over the full operation above the specified maximum junction temperature will –40°C to 150°C operating junction temperature range. High junction reduce lifetime. Rev. B For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information System Architecture Boost Controller Buck Regulators General Functions PCB Layout Thermal Considerations Typical Applications Package Description Revision History Related Parts