Alternative Parts


Features and Benefits

  • High Power 5V to 1.xV-3.xV Switching Controller: Can Exceed 10A Output
  • Maximum Duty Cycle > 90% Permits 3.3V to 2.xV Conversion Using a Low Power 5V Supply
  • All N-Channel External MOSFETs
  • Fixed Frequency Operation—Small L
  • Excellent Output Regulation: ±1% Over Line, Load and Temperature Variations
  • High Efficiency: Over 95% Possible
  • No Low Value Sense Resistor Needed
  • Outputs Can Drive External FETs with Up to 10,000pF Gate Capacitance
  • Quiescent Current: 350µA Typ, 1µA in Shutdown
  • Fast Transient Response
  • Adjustable or Fixed 3.3V Output
  • Available in 8-Lead SO and 16-Lead GN and SO Packages

Product Details

The LTC1430A is a high power, high efficiency switching regulator controller optimized for 5V to 1.xV-3.xV applications. It includes a precision internal reference and an internal feedback system that can provide output regulation of ±1% over temperature, load current and line voltage shifts. The LTC1430A uses a synchronous switching architecture with two N-channel output devices, eliminating the need for a high power, high cost P-channel device. Additionally, it senses output current across the drain-source resistance of the upper N-channel FET, providing an adjustable current limit without an external low value sense resistor.

The LTC1430A includes a fixed frequency PWM oscillator for low output ripple under virtually all operating conditions. The 200kHz free-running clock frequency can be externally adjusted from 100kHz to above 500kHz. The LTC1430A’s maximum duty cycle is typically 93.5% compared to 88% for the LTC1430. This permits 3.3V to 2.xV conversion using a low power 5V supply. The LTC1430A features low 350µA quiescent current, allowing greater than 90% efficiency operation in converter designs from 1A to greater than 50A output current. Shutdown mode drops the LTC1430A supply current to 1µA.

For new designs, refer to the LTC3830.


  • Power Supply for Pentium® II and AMD-K6® Microprocessors
  • High Power 5V to 3.xV Regulators
  • Local Regulation for Dual Voltage Logic Boards
  • Low Voltage, High Current Battery Regulation

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (4)

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