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The LM5575 is an easy-to-use SIMPLE SWITCHER® family of buck regulators that help design engineers design and optimize a robust power supply with a minimum of components. The LM5575 device has an input voltage range of 6 - 75V and outputs 1.5A of continuous current through an internally integrated 330 mΩ N-channel MOSFET. The regulator utilizes an emulated current mode design that provides internal linear regulation and accurate load transient response, easy loop compensation, and does not have the limitations of the low duty cycle of current mode regulators. The operating frequency is adjustable from 50 kHz to 500 kHz for size and efficiency optimization. To reduce electromagnetic interference (EMI), the frequency synchronization pin of the LM5575 allows multiple integrated circuits (ICs) of the LM(2)557X family to be self-synchronized or synchronized to an external clock. The LM5575 guarantees its reliability through cycle-by-cycle current limiting, short-circuit protection, thermal shutdown, and remote shutdown. The device is available in a power-enhanced TSSOP-16 package with exposed connection pads for thermal dissipation. The WEBENCH™ online design tool provides support for online design of the LM5575.

characteristic

The LM5575Q is an AEC-Q100 grade 1 qualified automotive grade product (operating junction temperature range ~40°C to +150°C).

Integrated 75V, 330mΩ N-Channel MOSFET

Ultra-wide input voltage range 6V to 75V

Adjustable output voltage down to 1.225V

1.5% feedback reference accuracy

Adjustable operating frequency from 50kHz to 500kHz with a single resistor

Master or slave frequency synchronization

Adjustable soft start

Emulated Current Mode Control Architecture

Wideband Error Amplifier

Built-in protection

AEC-Q100 Grade 0 qualified automotive-grade product data sheets are available upon request. (Operating Junction Temperature Range -40°C to +1500°C)