Datasheet LT8614 (Analog Devices) - 3

LT8614
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
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 9 mA Minimum On-Time ILOAD = 1.5A, SYNC = 0V l 15 30 45 ns ILOAD = 1.5A, SYNC = 3.3V l 15 30 45 ns Minimum Off-Time 80 110 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 85 mΩ Top Power NMOS Current Limit l 5.7 8.5 10 A Bottom Power NMOS On-Resistance VINTVCC = 3.4V, ISW = 1A 40 mΩ Bottom Power NMOS Current Limit VINTVCC = 3.4V l 4.5 6.9 8.5 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 1.2 % PG Leakage VPG = 3.3V –40 40 nA PG Pull-Down Resistance VPG = 0.1V l 650 2000 Ω SYNC Threshold SYNC Falling 0.8 1.1 1.4 V SYNC Rising 1.6 2.0 2.4 V SYNC Pin Current VSYNC = 6V –40 40 nA TR/SS Source Current l 1.5 2.2 2.9 µA TR/SS Pull-Down Resistance Fault Condition, TR/SS = 0.1V 200 Ω
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings High junction temperatures degrade operating lifetimes. The LT8614MP may cause permanent damage to the device. Exposure to any Absolute is 100% tested and guaranteed over the full –55°C to 150°C operating Maximum Rating condition for extended periods may affect device junction temperature range. Operating lifetime is derated at junction reliability and lifetime. temperatures greater than 125°C.
Note 2:
The LT8614E is guaranteed to meet performance specifications
Note 3:
θ values determined per JEDEC 51-7, 51-12. See the Applications from 0°C to 125°C junction temperature. Specifications over the –40°C Information section for information on improving the thermal resistance. to 125°C operating junction temperature range are assured by design,
Note 4:
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 LT8614I is guaranteed over the full –40°C to 125°C operating junction exceed 150°C when overtemperature protection is active. Continuous temperature range. The LT8614H is guaranteed to meet performance operation above the specified maximum operating junction temperature specifications from –40°C to 150°C operating junction temperature range. will reduce lifetime. 8614fd For more information www.linear.com/LT8614 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Applications Related Parts