LTC7806

RECOMMENDED FOR NEW DESIGNS

40V, Low IQ, 3MHz, 2-Phase Synchronous Boost Controller

Analog Devices LTC7806 Product Info

10 February 2026 6

Features

2-Phase Operation Reduces Required Input and Output Capacitance and Power Supply Induced Noise
Synchronous Operation for Highest Efficiency and 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 Capability for Synchronous MOSFET
R_SENSE 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 Low Ripple Burst Mode^® Operation at Light Loads
Input Current Monitor Output
Internal LDO Powers Gate Drive from V_BIAS or EXTV_CC
Low Shutdown I_Q: 1.5μA
Side Wettable 28-Lead 4mm × 5mm QFN Package
AEC-Q100 Qualified for Automotive Applications

Part details & applications

The LTC7806 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.

The LTC7806 operates from a wide 4.5V to 40V input supply range. When biased from the boost converter output, the LTC7806 can operate from an input supply as low as 1V after start-up. The very low no-load quiescent current extends operating run time in battery powered systems. OPTI-LOOP^® compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC7806 features a precision 1.2V reference, a power good output indicator, and an inductor current monitor.

Applications

Automotive and Transportation
Audio and RF Power Amplifiers
Industrial and Medical
Communications

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