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LTC3728LIGN#PBF
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LTC3728LIGN#PBF

  • 描述:LTC3728 - 550KHZ, DUAL, 2 PHASE
  • 品牌:
  • 交期:5-7 工作日
渠道:
  • 自营
  • 得捷
  • 贸泽

起订量: 33

  • 库存: 98
  • 单价: ¥64.85691
  • 数量:
    - +
  • 总计: ¥2,140.28
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规格参数

  • 部件状态 过时的
  • 输出类别 -
  • 功能 -
  • 输出配置 -
  • 拓扑结构 -
  • 输出数量 -
  • 输出阶段 -
  • 电源电压 (Vcc/Vdd) -
  • 开关频率 -
  • 最大占空比 -
  • 同步整流装置 -
  • 时钟同步 -
  • 串口 -
  • 控制功能特性 -
  • 安装类别 -
  • 供应商设备包装 -
  • 工作温度 -
  • 包装/外壳 -
  • 制造厂商

LTC3728LIGN#PBF 产品详情

The LTC3728L/LTC3728LX are dual high performance 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. The precision 0.8V reference and power good output indicator are compatible with future microprocessor generations, and a wide 4.5V to 28V (30V maximum) input supply range encompasses all battery chemistries.

A RUN/SS pin for each controller provides both soft-start and optional timed, short-circuit shutdown. Current foldback limits MOSFET 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. The LTC3728L/LTC3728LX include a power good output pin that indicates when both outputs are within 7.5% of their designed set point.

Vin RangeVref AccyCurrent Limit Latch Off3.3V LDO AvailableLTC37283.5V to 36V+/-1%YesLTC3728L4.5V to 28V+/-1%YesYesLTC3728LX4.5V to 28V+/- 1.5%YesYesLTC3728L-14.5V to 28V+/- 1.5%Foldback onlyYes

Feature

  • Dual, 180° Phased Controllers Reduce RequiredInput Capacitance and Power Supply Induced Noise
  • OPTI-LOOP® Compensation Minimizes COUT
  • ±1% Output Voltage Accuracy (LTC3728LC)
  • Power Good Output Voltage Indicator
  • Phase-Lockable Fixed Frequency 250kHz to 550kHz
  • Dual N-Channel MOSFET Synchronous Drive
  • Wide VIN Range: 4.5V to 28V 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
  • Low Shutdown IQ: 20µA
  • 5V and 3.3V Standby Regulators
  • 3 Selectable Operating Modes: Constant-Frequency, Burst Mode® Operation and PWM
  • 5mm × 5mm QFN and 28-Lead Narrow SSOP Packages

Applications

  • Notebook and Palmtop Computers
  • Telecom Systems
  • Portable Instruments
  • Battery-Operated Digital Devices
  • DC Power Distribution Systems


(Picture: Pinout)


LTC3728LIGN#PBF所属分类:DC - DC开关控制器,LTC3728LIGN#PBF 由 设计生产,可通过久芯网进行购买。LTC3728LIGN#PBF价格参考¥64.856910,你可以下载 LTC3728LIGN#PBF中文资料、PDF数据手册、Datasheet数据手册功能说明书,可查询LTC3728LIGN#PBF规格参数、现货库存、封装信息等信息!
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