LTC3548IDD-PBF

LTC3548IDD-PBF

  • 厂商:

    LINER

  • 封装:

  • 描述:

    LTC3548IDD-PBF - Dual Synchronous, 400mA/800mA, 2.25MHz Step-Down DC/DC Regulator - Linear Technolog...

  • 详情介绍
  • 数据手册
  • 价格&库存
LTC3548IDD-PBF 数据手册
LTC3548 Dual Synchronous, 400mA/800mA, 2.25MHz Step-Down DC/DC Regulator FEATURES n n n n n n n n n n n n n n DESCRIPTION The LTC®3548 is a dual, constant frequency, synchronous step down DC/DC converter. Intended for low power applications, it operates from 2.5V to 5.5V input voltage range and has a constant 2.25MHz switching frequency, allowing the use of tiny, low cost capacitors and inductors with a profile ≤1.2mm. Each output voltage is adjustable from 0.6V to 5V. Internal synchronous 0.35Ω, 0.7A/1.2A power switches provide high efficiency without the need for external Schottky diodes. A user selectable mode input is provided to allow the user to trade-off noise ripple for low power efficiency. Burst Mode® operation provides high efficiency at light loads, while Pulse Skip Mode provides low noise ripple at light loads. To further maximize battery runtime, the P-channel MOSFETs are turned on continuously in dropout (100% duty cycle), and both channels draw a total quiescent current of only 40μA. In shutdown, the device draws
LTC3548IDD-PBF
1. 物料型号: - LTC3548EDD#PBF - LTC3548IDD#PBF - LTC3548EMSE#PBF - LTC3548IMSE#PBF

2. 器件简介: LTC3548是一款由Linear Technology生产的双路、恒定频率、同步降压DC/DC转换器。适用于低功耗应用,输入电压范围为2.5V至5.5V,具有2.25MHz的恒定开关频率,允许使用小型、低成本的电容器和电感器。

3. 引脚分配: - VFB1 (Pin 1):输出反馈。 - RUN1 (Pin 2):调节器1使能。 - VIN (Pin 3):主电源。 - SW1 (Pin 4):调节器1开关节点连接至电感器。 - GND (Pin 5):主地。 - MODE/SYNC (Pin 6):模式选择和振荡器同步。 - SW2 (Pin 7):调节器2开关节点连接至电感器。 - POR (Pin 8):上电复位。 - RUN2 (Pin 9):调节器2使能。 - VFB2 (Pin 10):输出反馈。 - Exposed Pad (GND) (Pin 11):接地。

4. 参数特性: - 工作电压范围:2.5V至5.5V - 反馈电压:0.6V - 振荡器频率:2.25MHz - 同步频率:2.25MHz - 最大开关电流:0.95A/1.2A(通道1/通道2) - 开关导通电阻:0.35Ω/0.45Ω(上/下开关)

5. 功能详解: LTC3548采用恒定频率、电流模式架构。工作频率设定为2.25MHz,并且可以同步至外部振荡器。两个通道共享同一个时钟并同相运行。通过MODE/SYNC引脚可以选择低噪声和高效率之间的不同工作模式。

6. 应用信息: LTC3548适用于PDAs/掌上电脑、数码相机、手机、便携式媒体播放器、PC卡、无线和DSL调制解调器等应用。

7. 封装信息: - 10-Lead (3mm × 3mm) Plastic DFN - 10-Lead Plastic MSOP
LTC3548IDD-PBF 价格&库存

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