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|Type:||Power Distribution System||Rated Voltage:||10-100kV|
|Impulse Current Withstand:||31.5kA For 2s||Standard:||IEC60439|
|Applicable Wire Diameter:||16mm Sq≤D≤240mm Sq|
100kV Power Line Inductor,
IEC60439 Power Line Inductor,
|Vin (Min) (V)||4|
|Vin (Max) (V)||36|
|Vout (Min) (V)||1|
|Vout (Max) (V)||28|
|Iout (Max) (A)||1|
|Iq (Typ) (uA)||80|
|Switching frequency (Min) (kHz)||1100|
|Switching frequency (Max) (kHz)||1100|
|Features||Enable, Forced PWM, Light Load Efficiency, Over Current Protection, Pre-Bias Start-Up, Soft Start Fixed, Synchronous Rectification|
|Operating temperature range (C)||-40 to 125|
|Regulated outputs (#)||1|
The LMR544xx is a wide-VIN, easy-to-use synchronous buck converter capable of driving up to 1-A and 0.6-A load current. With a wide input range of 4 V to 36 V, the device is suitable for a wide range of industrial applications for power conditioning from an unregulated source.
The LMR544xx operates at 1.1-MHz switching frequency to support use of relatively small inductors for an optimized solution size. It has a PFM version to realize high efficiency at light load and a FPWM version to achieve constant frequency and small output voltage ripple over the full load range. Soft-start and compensation circuits are implemented internally, which allow the device to be used with minimal external components.
The device has built-in protection features, such as cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown in case of excessive power dissipation.
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