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LTC3419 - 典型应用图例:
LTC3419 典型应用图例一
LTC3419 典型应用图例二
LTC3419 - 封装图解:
LTC3419 封装图解一
LTC3419 封装图解二
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Linear产品 - LTC3419介绍
LTC3419 - LTC3419 是Dual Monolithic 600mA Synchronous Step-Down Regulator

LTC3419是Linear公司的一款多输出降压产品,LTC3419 是Dual Monolithic 600mA Synchronous Step-Down Regulator,本站介绍了LTC3419的封装应用图解、特点和优点、功能等,并给出了与LTC3419相关的凌力尔特元器件型号供参考。

LTC3419 - Dual Monolithic 600mA Synchronous Step-Down Regulator

LTC3419 - Dual Monolithic 600mA Synchronous Step-Down Regulator - Linear Technology(凌力尔特)

功能描述

The LTC3419 is a dual, 2.25MHz, constant-frequency, synchronous step-down DC/DC converter in a tiny 3mm × 3mm DFN package. 100% duty cycle provides low dropout operation, extending battery life in portable systems. Low output voltages are supported with the 0.6V feedback reference voltage. Each regulator can supply 600mA output current.

The input voltage range is 2.5V to 5.5V, making it ideal for Li-Ion and USB powered applications. Supply current during operation is only 35µA and drops to <1µA in shutdown. A user-selectable mode input allows the user to trade off between high efficiency Burst Mode operation and pulse-skipping mode.

An internally set 2.25MHz switching frequency allows the use of tiny surface mount inductors and capacitors. Internal soft-start reduces inrush current during start-up. Both outputs are internally compensated to work with ceramic output capacitors. The LTC3419 is available in a low profile (0.75mm) 3mm × 3mm DFN package. The LTC3419 is also available in a fixed output voltage configuration selected via internal resistor dividers (see Table 2).

特点
  • High Efficiency Dual Step-Down Outputs: Up to 96%
  • 600mA Current per Channel at VIN = 3V
  • Only 35µA Quiescent Current During Operation (Both Channels)
  • 2.25MHz Constant-Frequency Operation
  • 2.5V to 5.5V Input Voltage Range
  • Low Dropout Operation: 100% Duty Cycle
  • No Schottky Diodes Required
  • Internally Compensated for All Ceramic Capacitors
  • Independent Internal Soft-Start for Each Channel
  • Available in Fixed Output Versions
  • Current Mode Operation for Excellent Line and Load Transient Response
  • 0.6V Reference Allows Low Output Voltages
  • User-Selectable Burst Mode Operation
  • Short-Circuit Protected
  • Ultralow Shutdown Current: IQ < 1µA
  • Available in Small MSOP or 3mm × 3mm DFN-8 Packages
  • 应用
  • Cellular Telephones
  • Digital Still Cameras
  • Wireless and DSL Modems
  • Portable Media Players
  • PDAs/Palmtop PCs
  • 以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格(美元)
    器件型号 封装 温度 价格 (以 1 ~ 99 片为批量) 价格 (以 1000 片为批量)
    LTC3419EDD-1#PBF 3x3 DFN-8 E $2.79 $1.95
    LTC3419EDD-1#TRPBF 3x3 DFN-8 E $2.01
    LTC3419EDD#PBF 3x3 DFN-8 E $2.79 $1.95
    LTC3419EDD#TRPBF 3x3 DFN-8 E $2.01
    LTC3419EMS-1#PBF MS-10 E $2.79 $1.95
    LTC3419EMS-1#TRPBF MS-10 E $2.01
    LTC3419EMS#PBF MS-10 E $2.79 $1.95
    LTC3419EMS#TRPBF MS-10 E $2.01
    LTC3419IDD-1#PBF 3x3 DFN-8 I $3.07 $2.15
    LTC3419IDD-1#TRPBF 3x3 DFN-8 I $2.21
    LTC3419IDD#PBF 3x3 DFN-8 I $3.07 $2.15
    LTC3419IDD#TRPBF 3x3 DFN-8 I $2.21
    LTC3419IMS-1#PBF MS-10 I $3.07 $2.15
    LTC3419IMS-1#TRPBF MS-10 I $2.21
    LTC3419IMS#PBF MS-10 I $3.07 $2.15
    LTC3419IMS#TRPBF MS-10 I $2.21
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