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RT8105

5V/12V 同步降压型 DC/DC PWM 控制器

RT8105
New

RT8105为应用于供应PC系统逻辑电源的同步降压型 DC/DC PWM 控制器。此高效能，具备可调的单端输出产品，还具备内部缓开机、频率补偿网络、输出监控与保护功能。恒定操作频率300kHz可提供优化的效率、元件数量与价位的解决方案。透过低端MOSFET的RDS(ON)压差以达到可调的过电流保护监控功能。过电流保护功能透过4次的打嗝模式缓开机已达到错误侦测保护，并在电压过低保护期间持续保持在打嗝模式操作。

应用

  • Graphic Card
  • Motherboard, Desktop Servers
  • IA Equipments
  • Telecomm Equipments
  • High Power DC-DC Regulators

主要规格

RT8105
Status NRND
Recommended Alternative  RT8120E/RT8120F
Vs (typ) (V) 12;5
Vin (min) (V) 3.3
Vin (max) (V) 12
Vout (min) (V) 0.8
Vout (max) (V) 5
Output Adj. Method Resistor
Accuracy (+/- %) 2
Freq (typ) (kHz) 300
Iq (typ) (mA) 6
Ext Sync No
Features Force PWM;OCP;OVP;SCP;UVP;Voltage Mode Control
Package Type SOP-8

关键特性

  • 5V 至 12V 供应电压

  • 驱动所有低成本N-MOSFET

  • 电压摸式PWM控制

  • 300kHz 恒定切换频率

  • 快速瞬时响应:

  • 高速GM 放大器

  • 广范围0 至 100% 占空比

  • 内建缓开机

  • 适用于非交迭式的闸极驱动

  • 不需外加电流感测电阻的MOSFET过电流错误侦测机制，

  • 全时序电压过高保护

  • 符合RoHS规范与无卤特性

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