LMR51410数据手册TI中文资料规格书

描述 Description

The LMR514xx is a wide-VIN, easy-to-use synchronous buck converter capable of driving up to 0.6A and 1A load current. With a wide input range of 4V to 42V, the device is designed for a wide range of industrial applications for power conditioning from an unregulated source.

The LMR514xx operates at 400kHz and 1.1MHz switching frequency to support use of relatively small inductors for an optimized design size. The LMR514xx 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.

特性 Features

Functional Safety-Capable

Documentation available to aid functional safety system design



Configured for rugged industrial applications

4V to 42V input voltage range

Input transient protection up to 50V

0.6A / 1A continuous output current

80ns minimum switching on time

Fixed 400kHz and 1.1MHz switching frequency

–40°C to 150°C junction temperature range

98% maximum duty cycle

Monotonic start-up with prebiased output

Short-circuit protection with hiccup mode

Precision enable

±1.5% tolerance voltage reference



Small design size and ease of use

Integrated synchronous rectification

Internal compensation for ease of use

SOT-23 package



Various options in pin-to-pin compatible package

PFM and forced PWM (FPWM) options



Pin-to-pin compatible with the LMR51610, LMR16006, LV2862, LMR50410, TPS560430 and LMR54410

Create a custom design using the LMR514xx with the WEBENCH Power Designer