ZHCSIY5A October 2018 – May 2019 LMZM33604
PRODUCTION DATA.
- 1 特性
- 2 應(yīng)用
- 3 說明
- 4 修訂歷史記錄
- 5 Pin Configuration and Functions
- 6 Specifications
-
7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3
Feature Description
- 7.3.1 Adjusting the Output Voltage
- 7.3.2 Input Capacitor Selection
- 7.3.3 Output Capacitor Selection
- 7.3.4 Transient Response
- 7.3.5 Feed-Forward Capacitor
- 7.3.6 Switching Frequency (RT)
- 7.3.7 Synchronization (SYNC/MODE)
- 7.3.8 Output Enable (EN)
- 7.3.9 Programmable System UVLO (EN)
- 7.3.10 Internal LDO and BIAS_SEL
- 7.3.11 Power Good (PGOOD) and Power Good Pullup (PGOOD_PU)
- 7.3.12 Mode Select (Auto or FPWM)
- 7.3.13 Soft Start and Voltage Tracking
- 7.3.14 Voltage Dropout
- 7.3.15 Overcurrent Protection (OCP)
- 7.3.16 Thermal Shutdown
- 7.4 Device Functional Modes
- 8 Application and Implementation
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文檔支持
- 12機(jī)械、封裝和可訂購信息
封裝選項(xiàng)
請參考 PDF 數(shù)據(jù)表獲取器件具體的封裝圖。
機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RLX|41
散熱焊盤機(jī)械數(shù)據(jù) (封裝 | 引腳)
訂購信息
7.3.5 Feed-Forward Capacitor
The LMZM33604 is internally compensated to be stable over the operating range of the device. However, depending on the output voltage and amount of output capacitance, a feed-forward capacitor, CFF, may be added for optimum performance. The feed-forward capacitor should be placed in parallel with the top resistor divider, RFBT as shown in Figure 32. The value for CFF can be calculated using Equation 2. For output voltages < 1.2 V, CFF is ineffective and is not recommended.
Equation 2. 
where
- COUT is in µF
- RFBT is in kΩ
Figure 32. Feed-Forward Capacitor