Datasheet LT8650S (Analog Devices) - 3

LT8650S
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
VIN1 + VCC Quiescent Current when VEN/UV1 = VEN/UV2 = 2V, VFB1 = VFB2 >0.8V, VVC1 = VVC2 = VCC, VSYNC = 3.4V l 5 7 mA Active VIN Current in Regulation VIN = 12V, VOUT = 3.3V, Output Load = 100µA, VVC1 = VVC2 = VCC, VSYNC = 0V 45 75 µA VIN = 12V, VOUT = 3.3V, Output Load = 1mA, VVC1 = VVC2 = VCC, VSYNC = 0V 350 550 µA Feedback Reference Voltage 0.794 0.800 0.806 V l 0.790 0.800 0.810 V Feedback Voltage Line Regulation VIN = 4.0V to 36V 0.004 0.02 %/V Feedback Pin Input Current VFB = 0.8V –20 20 nA Minimum On-Time ILOAD = 3A, SYNC = 3.4V l 40 60 ns Oscillator Frequency RT = 133k l 270 300 330 kHz RT = 35.7k l 0.95 1.0 1.05 MHz RT = 15k l 1.85 2.00 2.15 MHz Top Power NMOS Current Limit l 10 12 14 A Bottom Power NMOS Current Limit 6.5 8.5 10.5 A SW Leakage Current VIN = 42V, VSW = 0V,42V –2 2 µA EN/UV Pin Threshold EN/UV Falling l 0.7 0.74 0.78 V EN/UV Pin Hysteresis 30 mV EN/UV Pin Current VEN/UV = 2V –20 20 nA PG Upper Threshold Offset from VFB VFB Falling l 5.5 7.5 9 % PG Lower Threshold Offset from VFB VFB Rising l –9.5 –7.5 –6 % PG Hysteresis 0.3 % PG Leakage VPG = 12V –40 40 nA PG Pull-Down Resistance VPG = 0.1V l 600 1200 Ohm SYNC Threshold SYNC DC and Clock Low Level Voltage 0.4 V SYNC Clock High Level Voltage 1.5 V SYNC DC High Level Voltage 2.8 V SYNC Pin Current VSYNC = 6V 120 µA SS Source Current l 1.0 2.0 3.0 µA SS Pull-Down Resistance Fault Condition, SS = 0.1V 200 Ω Error Amplifier Transconductance VC = 1.25V 0.9 mS VC Source Current VFB = 0.6V, VVC = 1.25V 170 µA VC Sink Current VFB = 1.0V, VVC = 1.25V 170 µA VC Pin to Switch Current Gain 9.6 A/V TEMP Output Voltage ITEMP = 0µA, Temperature = 25°C 190 250 310 mV ITEMP = 0µA, Temperature = 125°C 1100 1200 1300 mV
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings than 125°C. The junction temperature (TJ, in °C) is calculated from the may cause permanent damage to the device. Exposure to any Absolute ambient temperature (TA in °C) and power dissipation (PD, in Watts) Maximum Rating condition for extended periods may affect device according to the formula: reliability and lifetime. TJ = TA + (PD • θJA) where θJA (in °C/W) is the package thermal
Note 2:
The LT8650SE is guaranteed to meet performance specifications impedance. from 0°C to 125°C junction temperature. Specifications over the –40°C
Note 3:
This IC includes overtemperature protection that is intended to to 125°C operating junction temperature range are assured by design, protect the device during overload conditions. Junction temperature will characterization, and correlation with statistical process controls. The exceed 150°C when overtemperature protection is active. Continuous LT8650SI is guaranteed over the full –40°C to 125°C operating junction operation above the specified maximum operating junction temperature temperature range. High junction temperatures degrade operating will reduce lifetime lifetimes. Operating lifetime is derated at junction temperatures greater Rev A For more information www.analog.com 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 Typical Applications Package Description Revision History Typical Application Related Parts