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LTC3407A-2 3 3407a2f ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 3.6V, unless otherwise specified. (Note 2) Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTC3407AE-2 is guaranteed to meet specified performance from 0 °C to 85°C. Specifications over the –40°C and 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. The LTC3407AI-2 is guaranteed over the full –40 °C to 125°C operating temperature range. Note 3: The LTC3407A-2 is tested in a proprietary test mode that connects VFB to the output of the error amplifier. Note 4: Dynamic supply current is higher due to the internal gate charge being delivered at the switching frequency. Note 5: TJ is calculated from the ambient TA and power dissipation PD according to the following formula: TJ = TA + (PD • θJA). Note 6: The DFN switch on-resistance is guaranteed by correlation to wafer level measurements. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VIN Operating Voltage Range ● 2.5 5.5 V IFB Feedback Pin Input Current ● 30 nA VFB Feedback Voltage (Note 3) 0 °C ≤ TA ≤ 85°C 0.588 0.6 0.612 V –40 °C ≤ TA ≤ 125°C (Note 2) ● 0.585 0.6 0.612 V ΔVLINE REG Reference Voltage Line Regulation VIN = 2.5V to 5.5V (Note 3) 0.3 0.5 %/V ΔVLOAD REG Output Voltage Load Regulation MODE/SYNC = 0V (Note 3) 0.5 % IS Input DC Supply Current (Note 4) Active Mode VFB1 = VFB2 = 0.5V 700 950 μA Sleep Mode VFB1 = VFB2 = 0.63V, MODE/SYNC = 3.6V 40 60 μA Shutdown RUN = 0V, VIN = 5.5V, MODE/SYNC = 0V 0.1 1 μA fOSC Oscillator Frequency VFBX = 0.6V ● 1.8 2.25 2.7 MHz fSYNC Synchronization Frequency 2.25 MHz ILIM Peak Switch Current Limit VIN = 3V, VFBX = 0.5V, Duty Cycle <35% 1 1.2 1.6 A RDS(ON) Top Switch On-Resistance (Note 6) 0.35 0.45 Ω Bottom Switch On-Resistance (Note 6) 0.30 0.45 Ω ISW(LKG) Switch Leakage Current VIN = 5V, VRUN = 0V, VFBX = 0V 0.01 1 μA POR Power-On Reset Threshold VFBX Ramping Up, MODE/SYNC = 0V 8.5 % VFBX Ramping Down, MODE/SYNC = 0V –8.5 % Power-On Reset On-Resistance 100 200 Ω Power-On Reset Delay 65,536 Cycles VRUN RUN/SS Threshold Low ● 0.3 1 1.5 V RUN/SS Threshold High ● 2V IRUN RUN/SS Leakage Current ● 0.01 1 μA VMODE MODE Threshold Low 0 0.5 V MODE Threshold High VIN – 0.5 VIN V |
