• - 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 TPS40304A is a cost-optimized synchronous buck controller that operates from 3-V to 20-V input. The controller implements a voltage-mode control architecture with input-voltage feed-forward compensation that responds instantly to input voltage change. The switching frequency is fixed at 600 kHz.

Frequency Spread Spectrum feature adds dither to the switching frequency, significantly reducing the peak EMI noise and making it much easier to comply with EMI standards.

The TPS40304A offers design with a variety of user programmable functions, including soft-start, overcurrent protection (OCP) levels, and loop compensation.

The OCP level is programmed by a single external resistor connected from LDRV pin to circuit ground.

特性

• Input Voltage Range from 3 V to 20 V
• Fixed 600-kHz Switching Frequency
• High- and Low-Side FET R_DS(on) Current Sensing
• Programmable Thermally Compensated OCP Levels
• Programmable Soft-Start
• 591-mV, 1% Reference Voltage
• Voltage Feed-Forward Compensation
• Supports Pre-Biased Output
• Frequency Spread Spectrum
• Thermal Shutdown Protection at 145°C
• 10-Pin 3 mm × 3 mm SON Package with Ground
  Connection to Thermal Pad
• APPLICATIONS
  • POL Modules
  • Printer
  • Digital TV
  • Telecom