Texas Instruments LMR54410 | Demoboard PMP23365

Description

The LMR544xx is a wide-VIN, easy-to-use synchronous buck converter capable of driving up to 1A and 0.6A load current. With a wide input range of 4V to 36V, the device is designed for a wide range of industrial applications for power conditioning from an unregulated source.The LMR544xx operates at 1.1MHz switching frequency to support use of relatively small inductors for an optimized design size. The devices have 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.

Features

Functional Safety-CapableDocumentation available to aid functional safety system designConfigured for rugged industrial applications4V to 36V input voltage rangeWithstands up to 50V short VIN transient0.6A/1A continuous output current60ns minimum switching on time1.1MHz fixed switching frequency–40°C to 150°C junction temperature range98% maximum duty cycleMonotonic start-up with prebiased outputShort-circuit protection with hiccup modePrecision enable±1% tolerance voltage referenceSmall design size and ease of useIntegrated synchronous rectificationInternal compensation for ease of useSOT-23 packagePin-to-pin compatible with the LMR14010A, LMR50410, and TPS560430Various options in pin-to-pin compatible packagePFM and forced PWM (FPWM) options

Typical applications

• Machine vision camara

More information

• Datasheet
• IC product information