Analog Devices LTC7806

Description

The LTC®7806 is a high performance 2-phase single output synchronous boost converter controller that drives two N-channel power MOSFET stages out-of-phase. Its constant-frequency current mode architecture allows a phase-lockable switching frequency of up to 3MHz. High frequency 2-phase operation reduces input and output capacitor requirements and allows the use of smaller inductors compared to the single-phase equivalent. Synchronous rectification increases efficiency, reduces power losses, and eases thermal requirements, simplifying high power boost applications. The synchronous PassThru capability also minimizes losses in automotive start-stop applications.

Features

• 2-Phase Operation Reduces Required Input andOutput Capacitance and Power Supply Induced Noise
• Synchronous Operation for Highest Efficiencyand Reduced Heat Dissipation
• Wide Input Voltage Range: 4.5V to 40V,Operates Down to 1V After Start-Up
• Output Voltage Up to 40V
• Low Operating Quiescent Current: 18μA
• PassThru™ Operation: 100% Duty Cycle Capabilityfor Synchronous MOSFET
• RSENSE or Inductor DCR Current Sensing
• Spread Spectrum Operation
• Programmable Fixed Frequency (100kHz to 3MHz)
• Phase-Lockable Frequency (100kHz to 3MHz)
• Selectable Continuous, Pulse-Skipping, or LowRipple Burst Mode® Operation at Light Loads
• Input Current Monitor Output
• Internal LDO Powers Gate Drive from VBIAS or EXTVCC
• Low Shutdown IQ: 1.5μA
• Side Wettable 28-Lead 4mm × 5mm QFN Package
• AEC-Q100 Qualified for Automotive Applications

Typical applications

• Industrial
• Automotive and Transportation
• Medical
• Communications

More information

• Datasheet
• IC product information