2012-01-28 The XRP6124: EXAR's Newest NonSynchronous Step Down Controller

 

The XRP6124 is a non synchronous step down (buck) controller for up to 5Amps point of loads. A wide 3V to 30V input voltage range allows for single supply operations from industry standard 3.3V, 5V, 12V and 24V power rails.

With proprietary Constant On-Time (COT) control scheme, the XRP6124 provides extremely fast line and load transient response while the operating frequency remains nearly constant.  It requires low external component count and supports the use of ceramic output capacitors.

Features

- 5A Point-of-Load Capable
- Down to 0.8V Output Voltage Conversion
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Wide Input Voltage Range
      -
3V to 18V: XRP6124
      -
4.5V to 30V: XRP6124HV
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Constant-On-Time Operations
      -
Up to 1MHz Frequency Operations
      -
No External Compensation
- Supports Ceramic Output Capacitors
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Fast Transient Response
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Built-In 2ms Soft Start
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Short Circuit Protection
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<1μA shutdown current

Target Applications

- Point-of-Load Conversions
- Audio-Visual Equipment
- Industrial and Medical Equipment
- Distributed Power Architecture

 

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