ZHCS705C november 2011 – september 2020 TPS63060 , TPS63061
PRODUCTION DATA
- 1
- 1 特性
- 2 應用
- 3 說明
- 4 Revision History
- 5 Device Comparison
- 6 Pin Configuration and Functions
- 7 Specifications
- 8 Detailed Description
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
9.2.2.4 Step Four: Setting the Output Voltage
When the adjustable output voltage version TPS63060 is used, the output voltage is set by the external resistor divider. The resistor divider must be connected between VOUT, FB and GND. When the output voltage is regulated properly, the typical value of the voltage at the FB pin is 500mV. The maximum recommended value for the output voltage is 8V. The current through the resistive divider should be about 100 times greater than the current into the FB pin. The typical current into the FB pin is 0.01 μA, and the voltage across the resistor between FB and GND, R2, is typically 500 mV. Based on these two values, the recommended value for R2 should be lower than 500 k?, in order to set the divider current at 3 μA or higher. It is recommended to keep the value for this resistor in the range of 200 k?. From that, the value of the resistor connected between the VOUT pin and the FB pin, (R1) depending on the needed output voltage can be calculated using Equation 6.
Place a small capacitor (C4, 10 pF) in parallel with R2 when using the power save mode and the adjustable version, to provide filtering and improve the efficiency at light load.