ZHCSCO8E June 2014 – May 2019 TPS65283 , TPS65283-1
PRODUCTION DATA.
- 1 特性
- 2 應用
- 3 說明
- 4 典型電路原理圖
- 5 修訂歷史記錄
- 6 說明 （續）
- 7 Pin Configuration and Functions
- 8 Specifications
-
9 Detailed Description
- 9.1 Overview
- 9.2 Functional Block Diagram
- 9.3
Feature Description
- 9.3.1 Power Switch Detailed Description
- 9.3.2
Buck DC-DC Converter Detailed Description
- 9.3.2.1 Output Voltage
- 9.3.2.2 Adjustable Switching Frequency
- 9.3.2.3 Synchronization
- 9.3.2.4 Error Amplifier
- 9.3.2.5 Slope Compensation
- 9.3.2.6 Enable and Adjusting UVLO
- 9.3.2.7 Internal V7V Regulator
- 9.3.2.8 Short Circuit Protection
- 9.3.2.9 Bootstrap Voltage (BST) and Low Dropout Operation
- 9.3.2.10 Output Overvoltage Protection (OVP)
- 9.3.2.11 Power Good
- 9.3.2.12 Power-Up Sequencing
- 9.3.2.13 Thermal Performance
- 9.4 Device Functional Modes
- 10Application and Implementation
- 11Power Supply Recommendations
- 12Layout
- 13器件和文檔支持
- 14機械、封裝和可訂購信息
封裝選項
機械數據 (封裝 | 引腳)
- RGE|24
散熱焊盤機械數據 (封裝 | 引腳)
- RGE|24
訂購信息
10.2.2.5 Input Capacitor Selection
TI recommends a minimum 10-µF X7R/X5R ceramic input capacitor to be added between VIN and GND. Connect these capacitors as close as physically possible to the input pins of the converters as they handle the RMS ripple current shown in Equation 14. For this example, Iout = 2 A, Vout = 5 V, minimum Vin_min = 12 V, from Equation 14, the input capacitors must support a ripple current of 998-mA RMS.
The input capacitance value determines the input ripple voltage of the regulator. The input voltage ripple can be calculated using Equation 15. Using the design example values, Iout_max = 2.5 A, Cin = 10 µF, ƒSW = 500 kHz for buck2, yields an input voltage ripple of 125 mV.
To prevent large voltage transients, use a low-ESR capacitor sized for the maximum RMS current.