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1 Features

? AEC-Q100 qualified

– Temperature grade 1: –40°C to 125°C ambient

operating temperature range

? Functional Safety-Capable

– Documentation available to aid functional safety

system design

? Configured for rugged industrial applications

– 4V to 65V input voltage range

– Input transient protection up to 70V

– 0.6A / 1A continuous output current

– 80ns minimum switching on time

– Fixed 400kHz switching frequency

– –40°C to 150°C junction temperature range

– 96% maximum duty cycle

– Monotonic start-up with prebiased output

– Short-circuit protection with hiccup mode

– Precision enable

? Small design size and ease of use

– Integrated synchronous rectification

– Internal compensation for ease of use

? Various options in pin-to-pin compatible package

– PFM and forced PWM (FPWM) options

? Pin-to-pin compatible with the LMR16006Y-Q1,

LM2842-Q1, LMR50410-Q1, and TPS560430-Q1

? Create a custom design using the LMR516xx-Q1

with the WEBENCH?Power Designer

2 Applications

? Body electronics and lighting

? Infotainment and cluster

? Advanced driver assistance systems (ADAS)

3 Description

The LMR516xx-Q1 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 65V, the device is designed for a wide range of

industrial applications for power conditioning from an

unregulated source.

The LMR516xx-Q1 operates at 400kHz switching

frequency to support use of relatively small inductors

for an optimized design size. The LMR516xx-Q1

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.