ZHCSHF3C january 2018 – may 2023 TPS65268-Q1
PRODUCTION DATA
- 1
- 1 特性
- 2 應(yīng)用
- 3 描述
- 4 Revision History
- 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 Enable and Adjusting UVLO
- 7.3.3 Soft-Start Time
- 7.3.4 Power-Up Sequencing
- 7.3.5 V7V Low-Dropout Regulator and Bootstrap
- 7.3.6 Out-of-Phase Operation
- 7.3.7 Output Overvoltage Protection (OVP)
- 7.3.8 Slope Compensation
- 7.3.9 Overcurrent Protection
- 7.3.10 Power Good
- 7.3.11 Thermal Shutdown
- 7.4 Device Functional Modes
- 8 Application and Implementation
- 9 Device and Documentation Support
- 10Mechanical, Packaging, and Orderable Information
封裝選項(xiàng)
機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RHB|32
散熱焊盤機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RHB|32
訂購(gòu)信息
7.3.1 Adjusting the Output Voltage
The output voltage of each buck converter is set with a resistor divider from the output of the buck converter to the FB pin as shown in Figure 7-1. TI recommends using1% tolerance or better resistors. Use Equation 1 to calculate the value of R2.
Figure 7-1 Voltage Divider CircuitEquation 1. 
To improve efficiency at light loads, consider using larger value resistors. If the values are too high, the regulator is more sensitive to noise. Table 7-1 lists the recommended resistor values.
Table 7-1 Output Resistor Divider Selection
| OUTPUT VOLTAGE (V) | R1 (kΩ) | R2 (kΩ) |
|---|---|---|
| 1 | 10 | 15 |
| 1.2 | 10 | 10 |
| 1.5 | 15 | 10 |
| 1.8 | 20 | 10 |
| 2.5 | 31.6 | 10 |
| 3.3 | 45.3 | 10 |
| 3.3 | 22.6 | 4.99 |
| 5 | 73.2 | 10 |
| 5 | 36.5 | 4.99 |