Datasheet LT8601 (Analog Devices) - 4

link to page 2 link to page 22 LT8601
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = PVIN1 = PVIN2 = 12V, EN/UVLO = 3V, PVIN3 = 3.3V unless otherwise noted. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
Upper FB2 Power Good Threshold Percentage of VFB2 l 105 108 111 % PG2 Output Voltage Low IPG2 = –350µA l 0.13 0.3 V PG2 Leakage Current PG2 = 5V, FB2 = 1V l 30 µA TRKSS2 Pull-Up Current TRKSS2 = 0.2V 1.5 2.4 3.1 µA Minimum Switch-On Time ISW2 = 2A 55 ns Minimum Switch-Off Time ISW2 = 2A 70 ns
Channel 3
Operating Voltage l 2.6 5.5 V Feedback Voltage FB3 E-, I-Grade l 790 800 810 mV J-Grade l 784 800 812 mV Input Current FB3 l –100 100 nA FB3 Voltage Line Regulation VIN = 3V to 42V 0.002 0.01 %/V SW3 Current Limit 2.6 3.2 3.8 A SW3 Leakage PVIN3 = 5.5V 0.1 1 µA SW3 PMOS On Resistance ISW3 = 1A 150 mΩ SW3 NMOS On Resistance ISW3 = 1A 120 mΩ Lower FB3 Power Good Threshold Percentage of VFB3 l 89 92 95 % Upper FB3 Power Good Threshold Percentage of VFB3 l 105 108 111 % PG3 Output Voltage Low IPG3 = –350μA l 0.13 0.3 V PG3 Leakage Current PG3 = 5V, FB3 = 0.8V l 30 µA RUN3 Threshold Voltage 200mV/ms Falling Ramp l 0.695 0.72 0.74 V RUN3 Input Current RUN3 = 3.3V l –100 100 nA Soft-Start Time l 0.7 1 1.3 ms Minimum Switch-On Time ISW3 = 1A 70 ns Minimum Switch-Off Time ISW3 = 1A 70 ns PVIN3 UVLO l 2.35 2.6 V
Power-On Reset
CPOR Pull-Up Current CPOR = 0V 2 μA 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 RST = 6V, POR Timed Out –40 40 nA POREN Threshold l 1.15 1.2 1.25 V POREN Pull-Up Current POREN = 0V 0.8 1.2 1.6 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:
This IC includes overtemperature protection that is intended to reliability and lifetime. protect the device during overload conditions. Junction temperature will
Note 2:
The LT8601E 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 junction temperature will reduce to 125°C operating junction temperature range are assured by design, lifetime. characterization and correlation with statistical process controls. The
Note 4:
All three channels enabled as shown in the application circuit LT8601I is guaranteed to meet performance specifications from –40°C titled, “Details of the Front Page Application” (using the 1MHz component to 125°C junction temperature. The LT8601J is guaranteed over the full values) found in the Typical Applications section. –40°C to 150°C operating junction temperature range. High junction Rev. B 4 For more information www.analog.com 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 Typical Applications Package Description Revision History Typical Application Related Parts