Datasheet LT8620 (Analog Devices) - 3

LT8620
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage l 2.9 3.4 V VIN Quiescent Current VEN/UV = 0V, VSYNC = 0V 1.0 3 µA l 1.0 8 µA VEN/UV = 2V, Not Switching, VSYNC = 0V 1.7 4 µA l 1.7 10 µA VEN/UV = 2V, Not Switching, VSYNC = 2V 0.28 0.5 mA VIN Current in Regulation VOUT = 0.97V, VIN = 6V, Output Load = 100µA l 20 50 µA VOUT = 0.97V, VIN = 6V, Output Load = 1mA l 200 350 µA Feedback Reference Voltage VIN = 6V, ILOAD = 0.5A 0.964 0.970 0.976 V VIN = 6V, ILOAD = 0.5A l 0.958 0.970 0.982 V Feedback Voltage Line Regulation VIN = 4.0V to 42V, ILOAD = 0.5A l 0.004 0.02 %/V Feedback Pin Input Current VFB = 1V –20 20 nA INTVCC Voltage ILOAD = 0mA, VBIAS = 0V 3.23 3.4 3.57 V ILOAD = 0mA, VBIAS = 3.3V 3.25 3.29 3.35 V INTVCC Undervoltage Lockout 2.5 2.6 2.7 V BIAS Pin Current Consumption VBIAS = 3.3V, ILOAD = 1A, 2MHz 7.2 mA Minimum On-Time ILOAD = 1A, SYNC = 0V l 30 45 ns ILOAD = 1A, SYNC = 3.3V l 30 45 ns Minimum Off-Time 90 130 ns Oscillator Frequency RT = 221k, ILOAD = 1A l 180 210 240 kHz RT = 60.4k, ILOAD = 1A l 665 700 735 kHz RT = 18.2k, ILOAD = 1A l 1.85 2.00 2.15 MHz Top Power NMOS On-Resistance ISW = 1A 175 mΩ Top Power NMOS Current Limit l 2.8 4.1 4.9 A Bottom Power NMOS On-Resistance VINTVCC = 3.4V, ISW = 1A 85 mΩ Bottom Power NMOS Current Limit VINTVCC = 3.4V 2.9 3.9 4.7 A SW Leakage Current VIN = 42V, VSW = 0V, 42V –1.5 1.5 µA EN/UV Pin Threshold EN/UV Rising l 0.94 1.0 1.06 V EN/UV Pin Hysteresis 40 mV EN/UV Pin Current VEN/UV = 2V –20 20 nA PG Upper Threshold Offset from VFB VFB Falling l 6 9.0 12 % PG Lower Threshold Offset from VFB VFB Rising l –6 –9.0 –12 % PG Hysteresis 1.3 % PG Leakage VPG = 3.3V –40 40 nA PG Pull-Down Resistance VPG = 0.1V l 680 2000 Ω SYNC Threshold SYNC Falling 0.8 1.0 1.2 V SYNC Rising 1.1 1.3 1.5 V SYNC Pin Current VSYNC = 6V –100 100 nA TR/SS Source Current l 1.2 2 2.7 µA TR/SS Pull-Down Resistance Fault Condition, TR/SS = 0.1V 220 Ω
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings may 150°C operating junction temperature range. The LT8620MP is 100% cause permanent damage to the device. Exposure to any Absolute Maximum tested and guaranteed over the full −55°C to 150°C operating junction Rating condition for extended periods may affect device reliability and lifetime. temperature range. High junction temperatures degrade operating lifetimes.
Note 2:
The LT8620E is guaranteed to meet performance specifications Operating lifetime is derated at junction temperatures greater than 125°C. from 0°C to 125°C junction temperature. Specifications over the –40°C
Note 3:
This IC includes overtemperature protection that is intended to protect to 125°C operating junction temperature range are assured by design, the device during overload conditions. Junction temperature will exceed 150°C characterization, and correlation with statistical process controls. The when overtemperature protection is active. Continuous operation above the LT8620I is guaranteed over the full –40°C to 125°C operating junction specified maximum operating junction temperature will reduce lifetime. temperature range. The LT8620H is guaranteed over the full −40°C to 8620fa For more information www.linear.com/LT8620 3 Document Outline Features Applications Description 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