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LTC3312SAAVPBF Datasheet(PDF) 3 Page - Analog Devices |
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LTC3312SAAVPBF Datasheet(HTML) 3 Page - Analog Devices |
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3 / 28 page  LTC3312SA 3 Rev. 0 For more information www.analog.com ELECTRICAL CHARACTERISTICS PARAMETER CONDITIONS MIN TYP MAX UNITS Operating Supply Voltage (PVIN) l 2.25 5.5 V PVIN Undervoltage Lockout PVIN Undervoltage Lockout Hysteresis PVIN Rising l 2.05 2.15 150 2.25 V mV PVIN Quiescent Current in Shutdown 1.4 3 μA PVIN Quiescent Current with One Buck Enabled Burst Mode Operation, Sleeping All Modes, Not Sleeping, (Note 3) 50 1.5 80 2.3 µA mA PVIN Quiescent Current with Both Bucks Enabled Burst Mode Operation, Sleeping All Modes, Not Sleeping, (Note 3) 90 2.8 130 4.2 µA mA Enable Threshold Enable Threshold Hysteresis VEN Rising l 0.375 0.4 50 0.425 V mV EN Pin Leakage ±20 nA Voltage Regulation, Buck 1 and Buck 2 Regulated Feedback Voltage (VFB) l 495 500 505 mV Feedback Voltage Line Regulation 2.25V ≤ PVIN ≤ 5.5V 0.02 0.1 %/V Feedback Pin Input Current VFB = 500mV ±20 nA Top Switch Current Limit (IPEAKMAX) Current Out of SW, VOUT/VIN ≤ 0.2V 9.1 9.6 10.1 A Bottom Switch Current Limit (IVALLEYMAX) Current Out of SW 7.8 A Bottom Switch Reverse Current Limit (ILIMR) Current into SW, Forced Continuous Mode 2.5 4.0 5.5 A Top Switch ON-Resistance 12 mΩ Bottom Switch ON-Resistance 8 mΩ SW Leakage Current Shutdown, VIN = 5.5V ±1 μA Minimum On-Time VIN = 5.5V l 35 50 ns Maximum Duty-Cycle l 98 % Overtemperature Shutdown (OT) Overtemperature Shutdown Hysteresis Temperature Rising (Note 4) 165 5 °C °C Power Good/Soft-Start/Temp Monitor PGOOD Rising Threshold PGOOD Hysteresis As a % of the Regulated VOUT l l 97 0.6 98 1.1 99 1.6 % % Overvoltage Rising Threshold Overvoltage Hysteresis As a % of the Regulated VOUT l l 107 1 110 2.2 114 3.5 % % PGOOD Delay 100 μs PGOOD Pull-Down Resistance VPGOOD = 0.1V 10 20 Ω PGOOD Leakage Current VPGOOD = 5.5V 20 nA Default Soft-Start Duration VSSTT = AVIN, VOUT Rising from 0V to PGOOD Threshold 1 ms Soft-Start Charge Current VSSTT = 0.5V l 3 4 5 μA The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 3.3V, unless otherwise noted. PVIN = PVIN1 = PVIN2 |
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