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MAX1641 Datasheet(PDF) 3 Page - Maxim Integrated Products |
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MAX1641 Datasheet(HTML) 3 Page - Maxim Integrated Products |
3 / 11 page Adjustable-Output, Switch-Mode Current Source with Synchronous Rectifier _______________________________________________________________________________________ 3 ELECTRICAL CHARACTERISTICS (VIN = +12V, VOUT = 6V, Circuit of Figure 2, TA = -40°C to +85°C, unless otherwise noted.) IREF = 0 to 50µA VOUT = 2V to 24V (MAX1640) D0 = D1 = low D0 or D1 = high FET Drive Output Resistance MAX1641 MAX1640 VIN = 5.5V to 26V, ILOAD = 0 to 20mA VIN = 5.5V to 26V, ILOAD = 0 to 20mA MAX1640 CONDITIONS µA 1 VSET Input Current mV 10 Reference Load Regulation V 1.94 2.06 VREF Reference Voltage V 4.0 4.4 VLDOL Undervoltage Lockout µA 1 Output Current in Off Mode mA 4 Quiescent VIN Supply Current %/V 0.4 Output Current Compliance mV 34 48 Quarter-Scale Current-Sense Threshold 12 Ω Off-Time Range V 5.5 26 VIN Input Voltage Range 1.5 8 µs Off-Time Accuracy RTOFF = 62kΩ 1.5 2.5 µs 146 154 Pulse-Trickle Mode Duty-Cycle Period mV 141 159 Full-Scale Current-Sense Threshold V VIN - VIN - 5.5 4.5 VLDOH Linear-Regulator Output Voltage, VIN Referenced D0 = low, D1 = high, RTOFF = 50kΩ 25 42 ms V 4.5 5.5 VLDOL Linear-Regulator Output Voltage, Ground Referenced UNITS MIN TYP MAX SYMBOL PARAMETER PWM Maximum Duty Cycle 100 % Input Low Voltage VIL D0, D1 0.8 V Input High Voltage VIH D0, D1 2.4 V Input Leakage Current IIN D0, D1 ± 1 µA 33 42 MAX1641 ELECTRICAL CHARACTERISTICS (continued) (VIN = +12V, VOUT = 6V, Circuit of Figure 2, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) CONDITIONS UNITS MIN TYP MAX SYMBOL PARAMETER PWM Maximum Duty Cycle 100 % Input Low Voltage VIL D0, D1 0.8 V Input High Voltage VIH D0, D1 2.4 V Input Leakage Current IIN D0, D1 ± 1 µA |
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