LTC7802

RECOMMENDED FOR NEW DESIGNS

40V Low IQ, 3MHz Dual, 2-Phase Synchronous Step-Down Controller with Spread Spectrum

Analog Devices LTC7802 Product Info

10 February 2026 4

Features

Wide Input Voltage Range: 4.5V to 40V
Wide Output Voltage Range: 0.8V to 99% • V_IN
Low Operating I_Q: 14μA (14V to 3.3V, Channel 1 On)
Spread Spectrum Operation
R_SENSE or DCR Current Sensing
Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
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
Very Low Dropout Operation: 99% Duty Cycle
Power Good Output Voltage Monitors
Output Overvoltage Protection
Internal LDO Powers Gate Drive from V_IN or EXTV_CC
Low Shutdown I_Q: 1.5μA
Small 28-Lead 4mm × 5mm QFN Package
AEC-Q100 Qualified for Automotive Applications

Part details & applications

The LTC7802 is a high performance dual step-down synchronous DC/DC switching regulator controller that drives all N-channel power MOSFET stages. Constant frequency current mode architecture allows a phase-lockable switching frequency of up to 3MHz. The LTC7802 operates from a wide 4.5V to 40V input supply range. Power loss and supply noise are minimized by operating the two controller output stages out-of-phase.

The very low no-load quiescent current extends operating runtime 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 LTC7802 features a precision 0.8V reference and power good output indicators. The MODE pin selects among Burst Mode operation, pulse-skipping mode, or continuous inductor current mode at light loads.

The LTC7802 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.

APPLICATIONS

Automotive and Transportation
Industrial
Military/Avionics

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