LTC3727 - LTC3727是High Efficiency, 2-Phase Synchronous Step-Down Switching Regulators

LTC3727是LINEAR凌力尔特公司的一款多输出降压产品，LTC3727是LTC3727是High Efficiency, 2-Phase Synchronous Step-Down Switching Regulators，本站介绍了LTC3727的封装应用图解、特点和优点、功能等，并给出了与LTC3727相关的LINEAR元器件型号供参考。

LTC3727 - LTC3727是High Efficiency, 2-Phase Synchronous Step-Down Switching Regulators - 多输出降压 - 电源管理 - 凌力尔特

LTC3727 - High Efficiency, 2-Phase Synchronous Step-Down Switching Regulators

LTC3727 - High Efficiency, 2-Phase Synchronous Step-Down Switching Regulators - Linear Technology（凌力尔特）

功能描述

The LTC3727/LTC3727-1 are high performance dual step-down switching regulator controllers that drive 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 30V (36V maximum) input supply range encompasses all battery chemistries.

A RUN/SS pin for each controller provides soft-start, and on the LTC3727GN, optional timed, short-circuit shutdown. Current foldback limits MOSFET heat dissipation during short-circuit conditions when overcurrent latchoff is disabled. Output overvoltage protection circuitry latches on the bottom MOSFET until VOUT returns to normal. The FCB mode pin can select among Burst Mode, constant frequency mode and continuous inductor current mode or regulate a secondary winding.

特点

Wide Output Voltage Range:0.8V < or = VOUT < or = 14V

Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise

OPTI-LOOP Compensation Minimizes COUT

±1% Output Voltage Accuracy

Power Good Output Voltage Monitor

Phase-Lockable Fixed Frequency 250kHz to 550kHz

Latched Short-Circuit Shutdown (LTC3727 Only)

Dual N-Channel MOSFET Synchronous Drive

Wide VIN Range: 4V to 36V Operation

Very Low Dropout Operation: 99% Duty Cycle

Adjustable Soft-Start Current Ramping