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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LTC3589 датащи(PDF) 4 Page - Linear Technology |
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LTC3589 датащи(HTML) 4 Page - Linear Technology |
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4 / 36 page  LTC3375 4 3375fa For more information www.linear.com/3375 elecTrical characTerisTics The l denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VCC = VIN1-8 = 3.3V, unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VVCC VCC Voltage Range l 2.7 5.5 V VVCC_UVLO Undervoltage Threshold on VCC VCC Voltage Falling VCC Voltage Rising l l 2.35 2.45 2.45 2.55 2.55 2.65 V V IVCC_ALLOFF VCC Input Supply Current All Switching Regulators in Shutdown, PB = HIGH 11 25 µA IVCC VCC Input Supply Current At Least 1 Buck Active, SYNC = 0V, RT = 400k, VFB_BUCK = 0.85V At Least 1 Buck Active, SYNC = 2MHz 50 200 85 325 µA µA fOSC Internal Oscillator Frequency VRT = VCC, SYNC = 0V VRT = VCC, SYNC = 0V RRT = 400k, SYNC = 0V l l 1.8 1.75 1.8 2 2 2 2.2 2.25 2.2 MHz MHz MHz fSYNC Synchronization Frequency tLOW, tHIGH > 40ns 1 3 MHz VSYNC SYNC Level High SYNC Level Low l l 1.2 0.4 V V VRT RT Servo Voltage RRT = 400k l 780 800 820 mV Temperature Monitor VTEMP(ROOM) TEMP Voltage at 25°C 150 mV ∆VTEMP/°C VTEMP Slope l 6.75 mV/°C OT Overtemperature Shutdown Temperature Rising 165 °C OT_HYST Overtemperature Hysteresis 10 °C DT_WARN Die Temperature Warning Threshold (Die Temperature that Causes IRQ = 0) DT[1], DT[0] = 00 DT[1], DT[0] = 01 DT[1], DT[0] = 10 DT[1], DT[0] = 11 Inactive 140 125 110 °C °C °C 1A Buck Regulators VBUCK Buck Input Voltage Range l 2.25 5.5 V VOUT l VFB VIN V VIN_UVLO Undervoltage Threshold on VIN VIN Voltage Falling VIN Voltage Rising l l 1.95 2.05 2.05 2.15 2.15 2.25 V V IVIN_BUCK Burst Mode® Operation Forced Continuous Mode Operation Shutdown Input Current Shutdown Input Current VFB_BUCK = 0.85V (Note 4) ISW_BUCK = 0µA, VFB_BUCK = 0V All Switching Regulators in Shutdown At Least One Other Buck Active 18 400 0 1 50 550 1 2 µA µA µA µA IFWD PMOS Current Limit (Note 5) 2.0 2.3 2.7 A VFB (Default) Feedback Regulation Voltage Forced Continuous Mode Default (1, 1, 0, 0) l 705 725 745 mV VFB (High) Feedback Regulation Voltage Forced Continuous Mode Full Scale (1, 1, 1, 1) l 780 800 820 mV VFB (Low) Feedback Regulation Voltage Forced Continuous Mode Zero Scale (0, 0, 0, 0) l 405 425 445 mV VLSB VFB Servo Voltage Step Size 25 mV IFB Feedback Leakage Current VFB_BUCK = 0.85V –50 50 nA DMAX Maximum Duty Cycle VFB_BUCK = 0V l 100 % RPMOS PMOS On-Resistance ISW_BUCK = 100mA 265 mΩ RNMOS NMOS On-Resistance ISW_BUCK = –100mA 280 mΩ ILEAKP PMOS Leakage Current EN_BUCK = 0 –2 2 µA ILEAKN NMOS Leakage Current EN_BUCK = 0 –2 2 µA RSWPD Output Pull-Down Resistance in Shutdown EN_BUCK = 0 (I2C Bit Set) 1 kΩ tSS Soft-Start Time Default (1, 1, 0, 0) Reference Voltage 1 ms |
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