text.skipToContent text.skipToNavigation


4.5V to 42V, 3A Step-Down DC/DC Switching Regulator


Package | PIN: PWP | 20
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $3.85
10-24 $3.47
25-99 $3.24
100-249 $2.90
250-499 $2.71
500-749 $2.36
750-999 $2.04
1000+ $2.00


  • Integrated 42-V, 170-mΩ N-channel MOSFET
  • Ultra-Wide Input Voltage Range 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
  • HTSSOP-20EP (Exposed Pad)
  • Create a Custom Design Using the LM25576 With the WEBENCH® Power Designer

All trademarks are the property of their respective owners.

Texas Instruments  LM25576MHX/NOPB

The LM25576 is an easy to use buck regulator which allows design engineers to design andoptimize a robust power supply using a minimum set of components. Operating with an input voltagerange of 6 V to 42 V, the LM25576 delivers 3 A of continuous output current with an integrated170-mΩ N-Channel MOSFET. The regulator utilizes an Emulated Current Mode architecture whichprovides inherent line regulation, tight load transient response, and ease of loop compensationwithout the usual limitation of low-duty cycles associated with current mode regulators. Theoperating frequency is adjustable from 50 kHz to 1 MHz to allow optimization of size andefficiency. To reduce EMI, a frequency synchronization pin allows multiple IC’s from the LM(2)557xfamily to self-synchronize or to synchronize to an external clock. The LM25576 ensures robustnesswith cycle-by-cycle current limit, short-circuit protection, thermal shut-down, and remoteshut-down. The device is available in a power enhanced HTSSOP-20 package featuring an exposed dieattach pad for thermal dissipation. The LM25576 is supported by the full suite ofWEBENCH® On-Line design tools.