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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LTC3577 датащи(PDF) 6 Page - Linear Technology |
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LTC3577 датащи(HTML) 6 Page - Linear Technology |
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6 / 52 page  LTC3577/LTC3577-1 6 3577f ELECTRICAL CHARACTERISTICS I2C Interface. The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. DVCC = 3.3V, VOUT = 3.8V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS DVCC Input Supply Voltage 1.6 5.5 V IDVCC DVCC Supply Current SCL = 400kHz SCL = SDA = 0kHz 1 0.4 μA μA VDVCC,UVLO DVCC UVLO 1.0 V VIH Input HIGH Voltage 50 70 %DVCC VIL Input LOW Voltage 30 50 %DVCC IIH Input HIGH Leakage Current SDA = SCL = DVCC = 5.5V –1 1 μA IIL Input LOW Leakage Current SDA = SCL = 0V, DVCC = 5.5V –1 1 μA VOL SDA Output LOW Voltage ISDA = 3mA 0.4 V Timing Characteristics (Note 8) (All Values are Referenced to VIH and VIL) fSCL SCL Clock Frequency 400 kHz tLOW LOW Period of the SCL Clock 1.3 μs tHIGH HIGH Period of the SCL Clock 0.6 μs tBUF Bus Free Time Between Stop and Start Condition 1.3 μs tHD,STA Hold Time After (Repeated) Start Condition 0.6 μs tSU,STA Setup Time for a Repeated Start Condition 0.6 μs tSU,STO Stop Condition Set-Up Time 0.6 μs tHD,DATO Output Data Hold Time 0 900 ns tHD,DATI Input Data Hold Time 0 ns tSU,DAT Data Set-Up Time 100 ns tSP Input Spike Suppression Pulse Width 50 ns Step-Down Switching Regulators. The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VOUT = VIN12 = VIN3 = 3.8V, all regulators enabled unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Step-Down Switching Regulators (Buck1, Buck2 and Buck3) VIN12, VIN3 Input Supply Voltage (Note 9) l 2.7 5.5 V VOUT UVLO VOUT Falling VOUT Rising VIN12 and VIN3 Connected to VOUT Through Low Impedance. Switching Regulators are Disabled Below VOUT UVLO 2.5 2.7 2.8 2.9 V V fOSC Oscillator Frequency 1.91 2.25 2.59 MHz 800mA Step-Down Switching Regulator 3 (Buck3 – Pushbutton Enabled, Third in Sequence) IVIN3Q Pulse-Skipping Mode Input Current (Note 10) 100 μA Burst Mode Input Current (Note 10) 17 μA Shutdown Input Current 0.01 μA ILIM3 Peak PMOS Current Limit (Note 7) 1000 1400 1700 mA VFB3 Feedback Voltage Pulse-Skipping Mode Burst Mode Operation l l 0.78 0.78 0.8 0.8 0.82 0.824 V V IFB3 FB3 Input Current (Note 10) –0.05 0.05 μA D3 Max Duty Cycle FB3 = 0V 100 % RP3 RDS(ON) of PMOS 0.3 Ω RN3 RDS(ON) of NMOS 0.4 Ω |
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