LTC3727LX-1

PRODUCTION

High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator

Analog Devices LTC3727LX-1 Product Info

10 February 2026 6

Features

Wide Output Voltage Range: 0.8V ≤ V_OUT ≤ 14V
Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
OPTI-LOOP^® Compensation Minimizes C_OUT
±1.5% Output Voltage Accuracy
Power Good Output Voltage Monitor
Phase-Lockable Fixed Frequency 250kHz to 550kHz
Dual N-Channel MOSFET Synchronous Drive

Wide V_IN Range: 4V to 32V Operation
Very Low Dropout Operation: 99% Duty Cycle
Adjustable Soft-Start Current Ramping
Foldback Output Current Limiting
Output Overvoltage Protection
Low Shutdown I_Q: 20µA
Selectable Constant-Frequency or Burst Mode^® Operation
Small 28-Lead SSOP and 5mm × 5mm QFN Packages

Part details & applications

The LTC3727LX-1 is a high performance dual step-down switching regulator controller that drives all N-channel synchronous power MOSFET stages. A constant-frequency current mode architecture allows phase-lockable frequency of up to 550kHz. Power loss and noise due to the ESR of the input capacitors are minimized by operating the two controller output stages out of phase.

OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. There is a precision 0.8V reference and a power good output indicator. A wide 4V to 28V (32V maximum) input supply range encompasses all battery chemistries.

V_IN Range

V_REF Accuracy Over Temp

Latch-Off

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