LTC7801

RECOMMENDED FOR NEW DESIGNS

150V Low IQ, Synchronous Step-Down DC/DC Controller

Analog Devices LTC7801 Product Info

10 February 2026 6

Features

Wide V_IN Range: 4V to 140V (150V Abs Max)
Wide Output Voltage Range: 0.8V to 60V
Adjustable Gate Drive Level: 5V to 10V (OPTI-DRIVE)
Low Operating I_Q: 40μA (Shutdown = 10μA)
100% Duty Cycle Operation
Integrated Bootstrap Diode
Selectable Gate Drive UVLO Thresholds
Onboard LDO or External NMOS LDO for DRV_CC
EXTV_CC LDO Powers Drivers from V_OUT

Phase-Lockable Frequency (75kHz to 850kHz)
Programmable Fixed Frequency (50kHz to 900kHz)
Selectable Continuous, Pulse-Skipping or Low Ripple Burst Mode^® Operation at Light Loads
Adjustable Burst Clamp
Power Good Output Voltage Monitor
Programmable Input Overvoltage Lockout
Small 24-Lead 4mm × 5mm QFN or TSSOP Packages

Part details & applications

The LTC7801 is a high performance step-down switching regulator DC/DC controller that drives an all N-channel synchronous power MOSFET stage that can operate from input voltages up to 140V. A constant frequency current mode architecture allows a phase-lockable frequency of up to 850kHz.

The gate drive voltage can be programmed from 5V to 10V to allow the use of logic or standard-level FETs to maximize efficiency. An internal charge pump allows for 100% duty cycle operation.

The low 40μA 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 LTC7801 features a precision 0.8V reference and power good output indicator. The output voltage can be programmed between 0.8V to 60V using external resistors.

Applications

Automotive and Industrial Power Systems
High Voltage Battery Operated Systems
Telecommunications Power Systems

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