LTC3766 ELECTRICAL CHARACTERISTICSThe l denotes the specifications which apply over the specified operatingjunction temperature range, otherwise specifications are at TA = 25°C. (Note 2) VIN = 15V, GND = PGND = 0V, unless otherwise noted.SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITSOscillator and Phase-Locked Loop IFS/SYNC FS/SYNC Pin Sourcing Current 20 μA fHIGH Oscillator High Frequency Set Point VFS/SYNC = VCC 234 275 316 kHz Δf (RFS/SYNC) Oscillator Resistor Set Accuracy 18.75kΩ < RFS/SYNC < 125kΩ l –12 12 % fPLL(RANGE) PLL Sync Frequency Range 100 500 kHz Differential Amplifier ADA Gain 1.5V ≤ VSOUT ≤ 15V, VIN = 20V 0.99 1 1.01 V/V CMRRDA Common Mode Rejection Ratio VIN = 20V 75 dB R + INP VS Input Resistance VIN = 20V 120 kΩ R – INM VS Input Resistance VIN = 20V 160 kΩ I + OH Output Sourcing Current VIN = 20V, VS = 5V, VSOUT = 2.5V l 0.8 3.0 mA V + IN-VOHST Output High Fault Threshold VS Rising 1.2 1.5 V Note 1: Stresses beyond those listed under Absolute Maximum Ratings Note 3: TJ is calculated from the ambient temperature, TA, and power may cause permanent damage to the device. Exposure to any Absolute dissipation, PD, according to the following formula: Maximum Rating condition for extended periods may affect device TJ = TA + (PD • θJA°C/W) reliability and lifetime. where θJA is 95°C/W for the SSOP and 43°C/W for the QFN package. Note 2: The LTC3766E is guaranteed to meet specifications from 0°C Note 4: The LTC3766 is tested in a feedback loop that servos V to 85°C with specifications over the –40°C to 125°C operating junction FB to a voltage near the internal 0.6V reference voltage to obtain the specified ITH temperature range assured by design, characterization and correlation with voltage (V statistical process controls. The LTC3766I is guaranteed over the –40°C to ITH = 1.2V). 125°C operating junction temperature range, the LTC3766H is guaranteed Note 5: Operating supply current is measured in test mode. Dynamic over the –40°C to 150°C operating junction temperature range, and the supply current is higher due to the internal gate charge being delivered at LTC3766MP is tested and guaranteed over the –55°C to 150°C operating the switching frequency. See Typical Performance Characteristics. junction temperature range. High junction temperatures degrade operating Note 6: The VIN Regulator employs an external pass device to produce the lifetimes; operating lifetime is derated for junction temperatures greater regulated VCC output voltage. The LTC3766 is tested using a 2N3904 NPN than 125°C. Note that the maximum ambient temperature consistent with transistor as an external pass device. these specifications is determined by specific operating conditions in Note 7: Guaranteed by design. conjunction with board layout, the rated package thermal impedance and other environmental factors. 3766fc For more information www.linear.com/LTC3766 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Timing Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Timing Diagram Operation Applications Information Typical Applications Typical Applications Typical Applications Package Description Revision History Typical Application Related Parts
