LM25574 Datasheet | Texas Instruments

Product Folder Order Now Technical Documents Tools & Software Support & munity SNVS483H - JANUARY 2007 - REVISED AUGUST 2017 LM25574 42-V, 0.5-A Step-Down Switching Regulator 1 Features - 1 Integrated 42-V, 750-mΩ N-Channel MOSFET - Ultra-Wide Input Voltage From 6 V to 42 V - Adjustable Output Voltage as Low as 1.225 V - 1.5% Feedback Reference Accuracy - Operating Frequency Adjustable Between 50 k Hz and 1 MHz With Single Resistor - Master or Slave Frequency Synchronization - Adjustable Soft-Start - Emulated Current Mode Control Architecture - Wide Bandwidth Error Amplifier - Built-In Protection - TSSOP-16 Package - Create a Custom Design Using the LM25574 With the WEBENCH® Power Designer 2 Applications - Industrial 3 Description The LM25574 is an easy to use buck regulator which allows design engineers to design and optimize a robust power supply using a minimum set of ponents. Operating with an input voltage range of 6 V to 42 V, the LM25574 delivers 0.5-A of continuous output current with an integrated 750-mΩ N-Channel MOSFET. The regulator utilizes an Emulated Current Mode architecture which provides inherent line regulation, tight load transient response, and ease of loop pensation without the usual limitation of low-duty cycles associated with current mode regulators. The operating frequency is adjustable from 50 k Hz to 1-MHz to allow optimization of size and efficiency. To reduce EMI, a frequency synchronization pin allows multiple IC’s from the LM(2)557x family to self-synchronize or to synchronize to an external clock. The LM25574 guarantees robustness with cycle-by-cycle current limit, short-circuit protection, thermal shut-down, and remote shut-down. The device is available in a TSSOP-16 package. The LM25574 is supported by the full suite of WEBENCH® On-Line design tools. Device Information(1) PART NUMBER PACKAGE BODY SIZE...