text.skipToContent text.skipToNavigation


7.5-48V Wide Vin, 300mA Constant On-Time Synchronous Buck Regulator


Package | PIN: DDA | 8
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $2.74
10-24 $2.46
25-99 $2.29
100-249 $2.01
250-499 $1.88
500-749 $1.60
750-999 $1.35
1000+ $1.29


  • Wide 7.5-V to 48-V Input Range
  • Integrated 325-mA, High-Side and
    Low-Side Switches
  • No Schottky Required
  • Constant On-time Control
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • Nearly Constant Operating Frequency
  • Intelligent Peak Current Limit
  • Adjustable Output Voltage from 1.225 V
  • Precision 2% Feedback Reference
  • Frequency Adjustable to 1 MHz
  • Adjustable Undervoltage Lockout
  • Remote Shutdown
  • Thermal Shutdown
  • Create a Custom Design Using the LM25018 With the WEBENCH® Power Designer

All trademarks are the property of their respective owners.

Texas Instruments  LM25018MRE/NOPB

The LM25018 device is a 48-V, 325-mA synchronous step-down regulator with integratedhigh-side and low-side MOSFETs. The constant on-time (COT) control scheme employed in the LM25018device requires no loop compensation, provides excellent transient response, and enables very highstep-down ratios. The on-time varies inversely with the input voltage resulting in nearly constantfrequency over the input voltage range. A high-voltage startup regulator provides bias power forinternal operation of the IC and for integrated gate drivers.

A peak current-limit circuit protects against overload conditions. The undervoltagelockout (UVLO) circuit allows the input undervoltage threshold and hysteresis to be independentlyprogrammed. Other protection features include thermal shutdown and bias supply undervoltagelockout.

The LM25018 device is available in WSON-8 and SO Power PAD-8 plastic packages.