ZHCS760H February 2012 – June 2018 TLV62130 , TLV62130A
PRODUCTION DATA.
- 1 特性
- 2 应用
- 3 说明
- 4 修订历史记录
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
- 8 Detailed Description
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9 Application and Implementation
- 9.1 Application Information
- 9.2 Typical Application
- 9.3 System Examples
- 10Power Supply Recommendations
- 11Layout
- 12器件和文档支持
- 13机械、封装和可订购信息
9.2.2.5 Output Filter and Loop Stability
The TLV62130 is internally compensated to be stable with L-C filter combinations corresponding to a corner frequency to be calculated with Equation 12:
Proven nominal values for inductance and ceramic capacitance are given in Table 4 and are recommended for use. Different values may work, but care has to be taken on the loop stability which will be affected. More information including a detailed LC stability matrix can be found in SLVA463.
The TLV62130 device includes an internal 25-pF feedforward capacitor, connected between the VOS and FB pins. This capacitor impacts the frequency behavior and sets a pole and zero in the control loop with the resistors of the feedback divider, per equation Equation 13 and Equation 14:
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Though the TLV62130 is stable without the pole and zero being in a particular location, adjusting their location to the specific needs of the application can provide better performance in Power Save mode and/or improved transient response. An external feedforward capacitor can also be added. A more detailed discussion on the optimization for stability vs. transient response can be found in SLVA289 and SLVA466.