LM25019 48V、300mA・同期整流・降圧レギュレータ、MOSFET統合 | TIJ.co.jp

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The LM25019 is a 48-V, 100-mA synchronous step-down regulator with integrated high-side and low-side MOSFETs. The constant on-time (COT) control scheme employed in the LM25019 requires no loop compensation, provides excellent transient response, and enables very high step-down ratios. The on-time varies inversely with the input voltage resulting in nearly constant frequency over the input voltage range. A high-voltage start-up regulator provides bias power for internal operation of the IC and for integrated gate drivers.

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

The LM25019 is available in 8-pin WSON and 8-pin SO PowerPAD plastic packages.


  • Wide 7.5-V to 48-V Input Range
  • Integrated 100-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
  • Packages:
    • 8-Pin WSON
    • 8-Pin SO PowerPAD™

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    最小   最大   範囲  
  入力電圧 V 9.0 をコピー 48.0V
  出力電圧 V 1.25 をコピー 48.0V  
  負荷電流 A ≤ 0.1A  
  周囲温度 °C -40 をコピー 125°C  
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Part number オーダー・オプション Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Switching frequency (Max) (kHz) Soft start Features Operating temperature range (C) Topology
LM25019 ご注文 7.5     48     1.25     40     1000     Adjustable     Over Current Protection
Synchronous Rectification
UVLO Adjustable    
-40 to 125     Buck
Inverting Buck-Boost