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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LTM4620A датащи(PDF) 4 Page - Linear Technology |
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LTM4620A датащи(HTML) 4 Page - Linear Technology |
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4 / 36 page  LTM4650-1 4 46501fc For more information www.linear.com/LTM4650-1 elecTrical characTerisTics The l denotes the specifications which apply over the specified internal operating temperature range. Specified as each individual output channel. TA = 25°C (Note 2), VIN = 12V and VRUN1, VRUN2 at 5V unless otherwise noted. Per the typical application in Figure 24. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS tSETTLE (Each Channel) Settling Time for Dynamic Load Step Load: 0% to 50% to 0% of Full Load, VIN = 12V, COUT = 100µF, 470µF POSCAP 20 µs IOUT(PK) (Each Channel) Output Current Limit VIN = 12V, VOUT = 1.2V 35 A Control Section VFB1, VFB2 Voltage at VFB Pins IOUT = 0A, VOUT = 1.2V A-Grade B-Grade l l 0.596 0.594 0.600 0.600 0.604 0.606 V V IFB (Note 5) –5 –20 nA VOVL Feedback Overvoltage Lockout l 0.64 0.66 0.68 V TRACK1 (I), TRACK2 (I) Track Pin Soft-Start Pull-Up Current TRACK1 (I),TRACK2 (I) Start at 0V 1 1.3 1.5 µA UVLO Undervoltage Lockout (Falling) 3.3 V UVLO Hysteresis 0.6 V tON(MIN) Minimum On-Time (Note 5) 90 ns RFBHI1, RFBHI2 Resistor Between VOUTS1, VOUTS2 and VFB1, VFB2 Pins for Each Output 60.05 60.4 60.75 kΩ VPGOOD1, VPGOOD2 Low PGOOD Voltage Low IPGOOD = 2mA 0.1 0.3 V IPGOOD PGOOD Leakage Current VPGOOD = 5V ±5 µA VPGOOD PGOOD Trip Level VFB with Respect to Set Output Voltage VFB Ramping Negative VFB Ramping Positive –10 10 % % INTVCC Linear Regulator VINTVCC Internal VCC Voltage 6V < VIN < 15V 4.8 5 5.2 V VINTVCC Load Regulation INTVCC Load Regulation ICC = 0mA to 50mA 0.75 2 % VEXTVCC EXTVCC Switchover Voltage EXTVCC Ramping Positive 4.5 4.7 V VEXTVCC(DROP) EXTVCC Dropout ICC = 20mA, VEXTVCC = 5V 50 100 mV VEXTVCC(HYST) EXTVCC Hysteresis 220 mV Oscillator and Phase-Locked Loop Frequency Nominal Nominal Frequency fSET = 1.2V 450 500 550 kHz Frequency Low Lowest Frequency fSET = 0.93V 400 kHz Frequency High Highest Frequency fSET > 2.4V, Up to INTVCC 780 kHz fSET Frequency Set Current 9 10 11 µA RMODE_PLLIN MODE_PLLIN Input Resistance 250 kΩ CLKOUT Phase (Relative to VOUT1) PHASMD = GND PHASMD = Float PHASMD = INTVCC 60 90 120 Deg Deg Deg CLK High CLK Low Clock High Output Voltage Clock Low Output Voltage 2 0.2 V V |
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