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LTC3880 Datasheet(PDF) 5 Page - Linear Technology |
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LTC3880 Datasheet(HTML) 5 Page - Linear Technology |
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5 / 136 page  LTM4676A 5 4676afa For more information www.linear.com/LTM4676A elecTrical characTerisTics The l denotes the specifications which apply over the specified internal operating temperature range (Note 2). Specified as each individual output channel (Note 4). TA = 25°C, VIN = 12V, RUNn = 5V, FREQUENCY_SWITCH = 500kHz and VOUTn commanded to 1.000V unless otherwise noted. Configured with factory-default EEPROM settings and per Test Circuit 1, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS tDELAY(0ms) Turn-On Delay Time Time from First Rising Edge of RUNn to Rising Edge of GPIOn. TON_DELAYn = 0ms, TON_RISEn = 3ms, MFR_GPIO_PROPAGATEn = 0x0100, MFR_GPIO_RESPONSEn = 0x0000. VIN Having Been Established for at Least 40ms l 2.75 3.1 3.5 ms ∆VOUTn(LS) Peak Output Voltage Deviation for Dynamic Load Step Load: 0A to 6.5A and 6.5A to 0A at 6.5A/µs, Figure 69 Circuit, VOUTn = 1V, VIN = 12V (Note 12) 50 mV tSETTLE Settling Time for Dynamic Load Step Load: 0A to 6.5A and 6.5A to 0A at 6.5A/µs, Figure 69 Circuit, VOUTn = 1V, VIN = 12V (Note 12) 35 µs IOUTn(OCL_PK) Output Current Limit, Peak Cycle-by-Cycle Inductor Peak Current Limit Inception 22.5 A IOUTn(OCL_AVG) Output Current Limit, Time Averaged Time-Averaged Output Inductor Current Limit Inception Threshold, Commanded by IOUT_OC_FAULT_LIMITn (Note 12) 15.6A; See IO-RB-ACC Specification (Output Current Readback Accuracy) Control Section VFBCM0 Channel 0 Feedback Input Common Mode Range VOSNS0– Valid Input Range (Referred to SGND) VOSNS0+ Valid Input Range (Referred to SGND) l l –0.1 0.3 5.7 V V VFBCM1 Channel 1 Feedback Input Common Mode Range SGND Valid Input Range (Referred to GND) VOSNS1 Valid Input Range (Referred to SGND) l l –0.3 0.3 5.7 V V VOUT-RNG0 Full-Scale Command Voltage, Range 0 (Notes 7, 15) VOUTn Commanded to 5.500V, MFR_PWM_MODEn[1] = 0b Resolution LSB Step Size 5.422 12 1.375 5.576 V Bits mV VOUT-RNG1 Full-Scale Command Voltage, Range 1 (Notes 7, 15) VOUTn Commanded to 2.750V, MFR_PWM_MODEn[1] = 1b Resolution LSB Step Size 2.711 12 0.6875 2.788 V Bits mV RVSENSE0+ VOSNS0+ Impedance to SGND 0.05V ≤ VVOSNS0+ – VSGND ≤ 5.5V 41 kΩ RVSENSE1 VOSNS1 Impedance to SGND 0.05V ≤ VVOSNS1 – VSGND ≤ 5.5V 37 kΩ tON(MIN) Minimum On-Time (Note 8 ) 45 ns Analog OV/UV (Overvoltage/Undervoltage) Output Voltage Supervisor Comparators (VOUT_OV/UV_FAULT_LIMIT and VOUT_OV/UV_WARN_LIMIT Monitors) NOV/UV_COMP Resolution, Output Voltage Supervisors (Note 15) 8 Bits VOV-RNG Output OV Comparator Threshold Detection Range (Note 15) High Range Scale, MFR_PWM_MODEn[1] = 0b Low Range Scale, MFR_PWM_MODEn[1] = 1b 1 0.5 5.6 2.7 V V VOU-STP Output OV and UV Comparator Threshold Programming LSB Step Size (Note 15) High Range Scale, MFR_PWM_MODEn[1] = 0b Low Range Scale, MFR_PWM_MODEn[1] = 1b 22 11 mV mV |
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