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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LTC3370 датащи(PDF) 3 Page - Analog Devices |
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LTC3370 датащи(HTML) 3 Page - Analog Devices |
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3 / 22 page  LTC3315B 3 Rev. 0 For more information www.analog.com ELECTRICAL CHARACTERISTICS PARAMETER CONDITIONS MIN TYP MAX UNITS VIN Undervoltage Lockout VIN Undervoltage Lockout Hysteresis VIN Rising l 2.05 2.15 150 2.25 V mV VIN Quiescent Current in Shutdown 1.2 2 µA VIN Quiescent Current with One Buck Enabled Burst Mode, Buck in Regulation, Sleeping All Modes, Not Sleeping (Note 4) 45 1.6 70 2.5 µA mA VIN Quiescent Current with Both Bucks Enabled Burst Mode, Bucks in Regulation, Sleeping All Modes, Not Sleeping (Note 4) 70 2.9 110 4.4 µA mA Enable Threshold Enable Threshold Hysteresis VEN Rising l 375 400 50 425 mV mV EN Pin Leakage VEN = 5.5V ±20 nA Voltage Regulation, Buck 1 and Buck 2 Regulated Feedback Voltage (VFB) l 495 500 505 mV Feedback Voltage Line Regulation 2.25V ≤ VIN ≤ 5.5V 0.015 0.05 %/V Feedback Pin Input Current VFB = 500mV ±20 nA PMOS Current Limit (ILIM) Current out of SW, VOUT/VIN ≤ 0.2 2.9 3.2 3.5 A NMOS Current Limit (IVALLEY) Current out of SW 2.4 2.7 3.0 A NMOS Reverse Current Limit Current into SW, Forced Continuous 0.5 1 1.6 A PMOS ON-Resistance 75 mΩ NMOS ON-Resistance 19 mΩ SW Leakage Current Shutdown, VIN = 5.5V ±200 nA Minimum On Time VIN = 5.5V l 25 45 ns Maximum Duty Cycle l 100 % Overtemperature Shutdown (OT) Overtemperature Shutdown Hysteresis Temperature Rising (Note 5) 165 5 °C °C Power Good/Soft-Start PGOOD Rising Threshold PGOOD Hysteresis As a Percentage of the Regulated VOUT l l 97 0.6 98 1.1 99 1.6 % % Overvoltage Rising Threshold Overvoltage Hysteresis As a Percentage of the Regulated VOUT l l 107 1 110 2.2 114 3.5 % % PGOOD Delay 120 µs PGOOD Leakage Current VPGOOD = 5.5V 20 nA PGOOD Pull-Down Resistance VPGOOD = 0.1V 10 20 Ω Soft-Start Time (Note 6) l 0.25 1 3 ms Oscillator and MODE/SYNC Internal Oscillator Frequency (fSW) l 5.55 6 6.45 MHz Synchronization Frequency Range l 3 10 MHz Minimum SYNC High or Low Pulse Width l 40 ns SYNC Level High on MODE/SYNC SYNC Level Low on MODE/SYNC l l 1.2 0.4 V V MODE/SYNC No Clock Detect Time 10 µs MODE/SYNC Pin Threshold For Programming Pulse Skipping Mode For Programming Burst Mode l l VIN – 0.1 0.1 V V The l denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at TA = 25°C (Notes 2, 3). VIN = 3.3V unless otherwise specified. 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 LTC3315B is tested under pulsed load conditions such that TJ ≈ TA. The LTC3315BE is guaranteed to meet specifications from 0°C to 85°C junction temperature. Specifications over the –40°C to 125°C operating junction temperature range are assured by design, |
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