• - 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 TPS40040 and TPS40041 dc-to-dc controllers are designed to operate from a 2.25-V to 5.5-V input source. To reduce the number of external components, several operating parameters are fixed internally; namely, frequency, soft start time, and short circuit protection (SCP) levels. For example, the operating frequencies of TPS40040/1 are 300 kHz/600 kHz, respectively.

One of three short circuit threshold levels may be selected by the addition of an external resistor from the COMP pin to circuit ground. During power on, and before the internal soft start commands the output voltage to rise, the TPS40040/1 enters a calibration cycle, measures the current out of the COMP pin, and selects an internal SCP threshold voltage.

特性

• 2.25-V to 5.5-V Input
• Output Voltage from 0.6 V to 90% of VIN
• High-Side Drive for N-Channel FET
• Supports Pre-Biased Outputs
• Adaptive Anti-Cross Conduction Gate Drive
• 1%, 0.6-V Reference
• Two Fixed Switching Frequency Versions, TPS40040 (300 kHz) and TPS40041 (600 kHz)
• Three Selectable Short Circuit Protection Levels of 105 mV, 180 mV and 310 mV
• Hiccup Restart from Faults
• Voltage Mode Control
• Active Low Enable
• Thermal Shutdown Protection at 145°C
• 8-Pin, 3-mm × 3-mm SON with Ground Connection to Thermal Pad
• APPLICATIONS
  • Point of Load
  • Telecommunications
  • DC to DC Modules
  • Set Top Boxes