Active Member
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[China]
Address: 7F, Building F, Longjing Science park, 335 Bulong Road, Ma Antang Community, Bantian Street, Longgang District, Shenzhen, China
Contact name:sales
Yingxinyuan Int'l(Group) Ltd. |
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| 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 |
| Rating | Catalog |
| 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.
