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 components. 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 compensation without the usual limitation of low-duty cycles associated with current mode regulators. The operating frequency is adjustable from 50 kHz 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.
● 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 kHz 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
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