LTC3119 elecTrical characTerisTics The l denotes the specifications which apply over the specified operatingjunction temperature range, otherwise specifications are at TA = 25°C. VIN = PVIN = 12V, PVOUT = 5V, RT = 76.8k unless otherwise stated. PARAMETERCONDITIONSMINTYPMAXUNITS N-Channel Switch Resistance Switch A (PVIN to SW1) 30 mΩ Switch B (SW1 to PGND) 30 mΩ Switch C (SW2 to PGND) 30 mΩ Switch D (SW2 to PVOUT) 30 mΩ N-Channel Switch Leakage PVIN = PVOUT = 18V, SW1 = SW2 = 0V, 18V 1 10 µA VCC Regulation Voltage l 3.55 3.70 3.85 V VCC Dropout Voltage VCC Current = 50mA, VIN = 3V 90 mV VCC Current Limit 180 mA VCC Reverse Current VCC = 5V, VIN = 3V 5 µA Note 1: Stresses beyond those listed under Absolute Maximum Ratings Note 3: Current measurements are performed when the LTC3119 is may cause permanent damage to the device. Exposure to any Absolute not switching. The current limit values measured in operation will be Maximum Rating condition for extended periods may affect device somewhat higher due to the propagation delay of the comparators. reliability and lifetime. Note 4: Minimum input voltage is governed by the VCC UVLO threshold. If Note 2: The LTC3119 is tested under pulsed load conditions such VCC is maintained though external bootstrapping, the part will continue to that TJ ≈ TA. The LTC3119E is guaranteed to meet specifications from operate until power transfer to the output is no longer possible. 0°C to 85°C junction temperature. Specification over the –40°C to Note 5: Switch timing measurements are made in an open-loop test 125°C operating junction temperature range are assured by design, configuration. Timing in the application may vary somewhat from these characterization and correlation with statistical process controls. The values due to differences in the switch pin voltage during the non-overlap LTC3119I specifications are guaranteed over the –40°C to 125°C operating durations when switch pin voltage is influenced by the magnitude and junction temperature range. The LTC3119H specifications are guaranteed direction of the inductor current. over the –40°C to 150°C operating junction temperature range. The Note 6: This IC includes overtemperature protection that is intended to LTC3119MP specifications are guaranteed and tested over the –55°C to protect the device during momentary overload conditions. The maximum 150°C operating junction temperature range. High temperatures degrade rated junction temperature will be exceeded when this protection is active. operating lifetimes; operating lifetime is derated for junction temperatures Continuous operation above the specified absolute maximum operating greater than 125°C. junction temperature may impair device reliability or permanently damage the device. 3119fb 4 For more information www.linear.com/LTC3119 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Introduction PWM Mode Operation VCC Regulator Current Mode Control Error Amplifiers Current Limit and Zero Current Detection Soft-Start Maximum Power Point Control (MPPC) Burst Mode Operation Power Good Indicator Thermal Considerations Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
