LTC1628CG-SYNC数据手册集成电路（IC）的PMIC-稳压器-DCDC开关式控制器规格书PDF

描述 Description

DESCRIPTION
The LTC® 1628-SYNC 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 300kHz. Power loss and noise due to the ESR of the input capacitors are minimized by operating the two controller output stages out of phase.
FEATURES
■ Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
■ OPTI-LOOP™ Compensation Minimizes COUT
■ Dual N-Channel MOSFET Synchronous Drive
■ ±1% Output Voltage Accuracy
■ Power Good Output Voltage Monitor
■ Phase-Lockable Fixed Frequency 150kHz to 300kH
■ Wide VINRange: 3.5V to 36V Operation
■ Very Low Dropout Operation: 99% Duty Cycle
■ Adjustable Soft-Start Current Ramping
■ Foldback Output Current Limiting
■ Latched Short-Circuit Shutdown with Defeat Option
■ Output Overvoltage Protection
■ Remote Output Voltage Sense
■ Low Shutdown IQ: 20µA
■ 5V and 3.3V Standby Regulators
■ Small 28-Lead SSOP Package
■ Selectable Constant Frequency or Burst Mode™ Operation

特性 Features

■ Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
■ OPTI-LOOP™ Compensation Minimizes COUT
■ Dual N-Channel MOSFET Synchronous Drive
■ ±1% Output Voltage Accuracy
■ Power Good Output Voltage Monitor
■ Phase-Lockable Fixed Frequency 150kHz to 300kH
■ Wide VINRange: 3.5V to 36V Operation
■ Very Low Dropout Operation: 99% Duty Cycle
■ Adjustable Soft-Start Current Ramping
■ Foldback Output Current Limiting
■ Latched Short-Circuit Shutdown with Defeat Option
■ Output Overvoltage Protection
■ Remote Output Voltage Sense
■ Low Shutdown IQ: 20µA
■ 5V and 3.3V Standby Regulators
■ Small 28-Lead SSOP Package
■ Selectable Constant Frequency or Burst Mode™ Operation

简介

LTC1628CG-SYNC属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由制造生产的LTC1628CG-SYNCDC-DC 开关控制器PMIC（电源管理集成电路）DC 到 DC 开关式控制器是用于高效率电路的稳压 IC，其配置为生成高于（突升或步升）或低于（突降或步降）输入电源的输出电源电压。其他拓扑结构可能包括：降压-升压、反激、正激、Cuk、SEPIC、全桥、半桥和推挽式。这些器件不同于需要最小电压并“烧尽”多余电压的线性稳压器。