• - 交流-直流(AC-DC)控制器和稳压器
• - 直流-直流(DC-DC)控制器、转换器和稳压器
• - 电压和电流管理
• - 通讯IC
• - 驱动器
• - 热管理

• - 时钟及数据分配
• - 标准逻辑

• - 放大器和比较器
• - 模拟开关
• - 数字电位计
• - 接口
• - EMI和RFI滤波器

• - EEPROM存储器
• - 非易失性只读存储器(NVRAM)
• - SRAM存储器

说明

The TPS54900 four-channel step-down converter uses voltage mode PWM control to provide four independently programmable output voltages. Each regulated channel includes a high-side PMOSFET switch with a typical r_DS(ON) of 0.8 , which makes it suitable for high efficiency, low current applications. Commands sent to the TPS54900 over the four wire serial port programs the outputs independently or globally to supply voltages from 7.5 V to 13.1 V in 0.4-V increments. When the input voltage is desired at an output, a bypass mode can be activated which fully enhances the PMOSFET switch and disables the switching circuitry of the selected channel.

The TPS54900 is an ideal companion device to power THS7102 ADSL line drivers as a part of the AC5 central office ADSL chipset.

特性

• Four Independent 100-mA Channels Programmable Over 4-Wire Serial Port
• Converter Regulation Range: 7.5 V to 13.1 V in 400-mV Steps, Plus Unregulated Pass-Through Mode to Shunt VIN to any Output
• Internally Compensated PWM Controller and Integrated PMOS Power Switches
• Global and Per Channel Status Available Through Serial Port
• External Synchronization of PWM With System Clock
• Per Channel Current Limit and Global Thermal Shutdown
• -40°C to 85°C Ambient Temperature Range
• APPLICATIONS
  • ADSL Central Office Line Drivers
  • Software Line Card Provisioning