Vin (Min) (V)6Vin (Max) (V)42Vout (Min) (V)1.23Vout (Max) (V)40Iout (Max) (A)3Iq (Typ) (mA)1Switching frequency (Min) (kHz)50Switching frequency (Max) (kHz)1000FeaturesFrequency Synchronization, Over Current Protection, Soft Start AdjustableOperating temperature range (C)-40 to 125RatingAutomotiveRegulated outputs (#)1open-in-newFind other Buck converters (integrated switch)
The LM25576-Q1 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 LM25576-Q1 delivers 3 A of continuous output current with an integrated 170-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 LM25576-Q1 ensures robustness with cycle-by-cycle current limit, short-circuit protection, thermal shut-down, and remote shut-down. The device is available in a power enhanced HTSSOP-20 package featuring an exposed die attach pad for thermal dissipation. The LM25576-Q1 is supported by the full suite of WEBENCH® On-Line design tools.