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LTC4449 Datasheet(PDF) 6 Page - Linear Technology |
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LTC4449 Datasheet(HTML) 6 Page - Linear Technology |
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6 / 108 page  LTC3882-1 6 Rev A For more information www.analog.com ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Input Voltage Supervisor VON_TOL Input ON/OFF Threshold Error 15V ≤ VIN_ON ≤ 35V l –2 2 % NVON Input ON/OFF Threshold Resolution 143 mV Output Voltage Supervisors VUVOV_R0 Range 0 Maximum Threshold Range 0 Error Range 0 Threshold Resolution Range 0 Threshold Hysteresis 2V ≤ VOUT ≤ 5V (Falling for UV and Rising for OV) l –1 5.5 11 1 54 V % mV mV VUVOV_R1 Range 1 Maximum Threshold Range 1 Error Range 1 Threshold Resolution Range 1 Threshold Hysteresis 1V ≤ VOUT ≤ 2.5V (Falling for UV and Rising for OV) l –1 2.75 5.5 1 27 V % mV mV Output Current Supervisors VILIM_TOL Output Current Limit Tolerance ISENSE+ – ISENSE– 15mV < ISENSE+ – ISENSE– ≤ 30mV 30mV < ISENSE+ – ISENSE– ≤ 50mV 50mV < ISENSE+ – ISENSE– ≤ 70mV l l l –1.7 –2.5 –5.2 1.7 2.5 5.2 mV mV mV NlLIM ISENSE+ – ISENSE– Threshold Resolution 1LSB 0.4 mV ADC Readback Telemetry (Note 8) NVIN VINSNS Readback Resolution (Note 9) 10 Bits VIN_TUE VINSNS Total Unadjusted Readback Error 4.5V ≤ VINSNS ≤ 38V l 0.5 2 % % NDC PWM Duty Cycle Resolution (Note 9) 10 Bits DCTUE PWM Duty Cycle Total Unadjusted Readback Error PWM Duty Cycle = 12.5% –2 2 % NVOUT VOUT Readback Resolution 244 µV VOUT_TUE VOUT Total Unadjusted Readback Error 0.6V ≤ VOUT ≤ 5.5V, Constant Load l –0.5 ±0.2 0.5 % % NISENSE IOUT Readback Resolution LSB Step Size (at ISENSE±) (Note 9) 0mV ≤ |ISENSE+ – ISENSE–| < 16mV 16mV ≤ |ISENSE+ – ISENSE–| < 32mV 32mV ≤ |ISENSE+ – ISENSE–| < 63.9mV 63.9mV ≤ |ISENSE+ – ISENSE–| ≤ 70mV 10 15.625 31.25 62.5 125 Bits µV µV µV µV ISENSE_TUE IOUT Total Unadjusted Readback Error |ISENSE+ – ISENSE–| ≥ 6mV, 0V ≤ VOUT ≤ 5.5V l –1 1 % ISENSE_OS IOUT Zero-Code Offset Voltage ±32 µV NTEMP Temperature Resolution 0.25 °C TEXT_TUE External Temperature Total Unadjusted Readback Error TSNS0, TSNS1 ≤ 1.85V (Note 10) MFR_PWM_MODE_LTC3882-1[6] = 0 MFR_PWM_MODE_LTC3882-1[6] = 1 l l –3 –7 3 7 °C °C TINT_TUE Internal Temperature Total Unadjusted Readback Error Internal Diode (Note 10) ±1 °C tCONVERT Update Rate (Note 11) 90 ms Internal EEPROM (Notes 4, 6) Endurance Number of Write Operations 0°C ≤ TJ ≤ 85°C During All Write Operations 10,000 Cycles Retention Stored Data Retention TJ ≤ 125°C 10 Years Mass Write Time STORE_USER_ALL Execution Duration 0°C ≤ TJ ≤ 85°C During All Write Operations 0.2 2 s The l denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TJ = 25°C (Note 2). VCC = 5V, VSENSE0+ = VSENSE1+ = 1.8V, VSENSE0– = VSENSE1– = IAVG_GND = GND = 0V, fSYNC = 500kHz (externally driven) unless otherwise specified. |
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