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LT8551 Datasheet(PDF) 4 Page - Analog Devices |
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LT8551 Datasheet(HTML) 4 Page - Analog Devices |
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4 / 32 page  LT8551 4 Rev 0 For more information www.analog.com ELECTRICAL CHARACTERISTICS PARAMETER CONDITIONS MIN TYP MAX UNITS (ISPn –ISNn) Voltage In Regulation IAMPP = 2.20V, IAMPN = 0V, ILIM = 0V, ISNn = 12V IAMPP = 0.60V, IAMPN = 0V, ILIM = 0V, ISNn = 12V IAMPP = 2.20V, IAMPN = 0V, ILIM = REG, ISNn = 12V IAMPP = 0.60V, IAMPN = 0V, ILIM = REG, ISNn = 12V IAMPP = 2.20V, IAMPN = 0V, ILIM = Float, ISNn = 12V IAMPP = 0.60V, IAMPN = 0V, ILIM = Float, ISNn = 12V l l l l l l 21.25 –26.75 45 –51 67.25 –76.75 26.75 –21.25 51 –45 76.75 –67.25 mV mV mV mV mV mV (ISP–ISN) to IAMPP Voltage Gain ILIM = 0V, Master LT8551, ISP = 0V ILIM = REG, Master LT8551, ISP = 0V ILIM = FLOAT, Master LT8551, ISP = 0V 33.3 16.7 11.1 IAMPP Sourcing Current Limit (ISP–ISN) = 0mV, Master LT8551 l 250 µA IAMPP Sinking Current Limit (ISP–ISN) = 0mV, Master LT8551 l 60 µA IAMPP Load Regulation ILOAD = –200µA to 50 µA, Master LT8551 1 mV IAMPP Pin Bias Current IAMPP = 1.2V, Slave LT8551 IAMPP = 2.4V, Slave LT8551 3 6 µA µA Mismatch Between (ISPn –ISNn) and Master LT8551’s (ISP–ISN) in Regulation ILIM = REG l –6 –4.75 6 4.75 % % Mismatch Between (ISPn –ISNn) and Master LT8551’s (ISP–ISN) in Regulation ILIM = FLOAT l –6 –5.5 6 5.5 % % Mismatch Between (ISPn –ISNn) and Master LT8551’s (ISP–ISN) in Regulation ILIM = 0V l –10 –8 10 8 % % Oscillator CLK1 Frequency RT/MS = 24.3kΩ, Master LT8551 RT/MS = 100 kΩ, Master LT8551 RT/MS = 249kΩ, Master LT8551 l l l 900 236 90 1000 250 100 1100 264 110 kHz kHz kHz Switching Frequency Range Free-Running Synchronizing l l 100 125 1000 1000 kHz kHz SYNC High Level for Synchronization l 1.2 V SYNC Low Level for Synchronization l 0.8 V CLK1, CLK2 Rise Time CLOAD = 220pF, Master LT8551 (Note 4) 7 ns CLK1, CLK2 Fall Time CLOAD = 220pF, Master LT8551 (Note 4) 5 ns CLK2 Rising Threshold Slave LT8551 l 4 V CLK2 Falling Threshold Slave LT8551 l 1 V PHS1, PHS2 High Rising Threshold l 4.65 V PHS1, PHS2 High Threshold Hysteresis 80 mV PHS1, PHS2 Low Falling Threshold l 0.3 V PHS1, PHS2 Low Threshold Hysteresis 80 mV PHS1, PHS2 Impedance at Floating 11 kΩ PHS3 Rising Threshold l 4.65 V PHS3 Threshold Hysteresis 80 mV REG LDO REG Voltage REGSNS = 5V, IAMPN = 0V, ILOAD = 45mA l 4.9 5.1 5.3 V REG LDO Current Limit VIN = 12V, REGSNS = 5V, REG, VCC = 4V VIN = 24V, REGSNS = 5V, REG, VCC = 4V 250 145 mA mA REG LDO Gate Drive Clamp Voltage (VIN – REGDRV) Voltage, REG, VCC = 4.5V 5.3 V REG Load Regulation ILOAD = 0A to 100mA, REGSNS = 5V, IAMPN = 0V 90 mV The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, REG = 5V, VCC = 5V, SHDN = High, unless otherwise noted. |
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