LTC7810 Datasheet

• Wide V_IN Range: 4.5V to 140V (150V Abs Max)
• Wide Output Voltage Range: 1V ≤ V_OUT ≤ 60V
• Low Operating I_Q: 16μA (48V_IN to 12V_OUT and 3.3V_OUT)
• Adjustable Gate Drive Level Up to 10V
• Optional Spread Spectrum Operation
• Very Low Dropout: 100% Duty Cycle Operation
• Low I_Q in Dropout: 78µA (One Channel On)
• R_SENSE or Inductor DCR Current Sensing
• Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
• Phase-Lockable Frequency (75kHz to 720kHz)
• Programmable Fixed Frequency (50kHz to 750kHz)
• Selectable Continuous, Pulse-Skipping, or Low Ripple Burst Mode^® Operation at Light Loads
• Onboard LDO or External NMOS LDO for DRV_CC
• EXTV_CC LDO Powers Drivers from V_OUT
• Programmable Input Overvoltage Lockout
• 48-Lead (7mm × 7mm) eLQFP Package
• AEC-Q100 in Progress

• Automotive and Transportation
• Industrial and Telecommunications
• Military/Avionics

The LTC7810 is a high performance dual step-down DC/DC switching regulator controller that drives all N-channel synchronous power MOSFET stages that can operate from voltages up to 140V. A constant frequency current mode architecture allows a phase-lockable frequency of up to 720kHz.

The low no-load quiescent current extends operating run time in battery-powered systems. The LTC7810 features a precision 1V reference, enabling the output voltage to be programmed from 1V to 60V. The gate drive voltage for the LTC7810 can be programmed to 6V, 8V, or 10V to allow the use of logic-level or standard-threshold FETs and to maximize efficiency.

The LTC7810 additionally features spread spectrum operation which significantly reduces the peak radiated and conducted noise on both the input and output supplies, making it easier to comply with electromagnetic interference (EMI) standards.