1. Products
  2. Power Management
  3. Switching Regulators
  4. Step-Down (Buck) Regulators
  5. Digitally Programmable Regulators
  6. LTC3734


Features and Benefits

  • Wide Input Voltage Range: 4V to 30V
  • ±1% Output Voltage Accuracy
  • 6-Bit IMVP-IV VID Code: VOUT = 0.7V to 1.708V
  • Intel Compatible Power Saving Mode (PSIB)
  • Power Good Output with Adaptive Masking
  • Lossless Voltage Positioning
  • Resistor Programmable VOUT at Boot-Up and Deeper Sleep State
  • Resistor Programmable Deep Sleep Offset
  • Programmable Fixed Frequency: 210kHz to 550kHz
  • Adjustable Soft-Start Current Ramping
  • Foldback Output Current Limit
  • Short-Circuit Shutdown Timer with Defeat Option
  • Overvoltage Protection
  • Available in 32-Lead 5mm × 5mm × 0.8mm (Profile) QFN Package

Product Details

The LTC3734 is a single-phase synchronous step-down switching regulator controller that drives all N-channel power MOSFETs in a constant frequency architecture. The output voltage is programmable by six VID bits during normal operation and by external resistors during initial boot-up and deeper sleep state. The LTC3734 drives its output stage at frequencies up to 550kHz. Powerful onchip gate drivers eliminate the need for external gate driver ICs, thus simplifying the design.

An Intel compatible PSIB input is provided to select between two modes of operation. Fully enhanced synchronous mode achieves a very small output ripple and very fast transient response while power saving mode realizes very high efficiency. OPTI-LOOP® compensation allows the transient response to be optimized for a wide range of output capacitance and ESR values.

The LTC3734 is available in a small 5mm × 5mm QFN package. For 2-phase applications refer to the LTC3735.


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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 (1)

Product Recommendations

LTC3734 Companion Parts

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Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
LTC3734EUH#PBF Material Declaration Reliability Data 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)
LTC3734EUH#TRPBF Material Declaration Reliability Data 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)
Wafer Fabrication Data R384 Reliability Data

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Evaluation Boards

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.