ZHCSI17B December 2008 – May 2018 TPS650250
PRODUCTION DATA.
- 1 特性
- 2 應用
- 3 說明
- 4 修訂歷史記錄
- 5 Pin Configuration and Functions
-
6 Specifications
- 6.1 Absolute Maximum Ratings
- 6.2 ESD Ratings
- 6.3 Recommended Operating Conditions
- 6.4 Thermal Information
- 6.5 Dissipation Ratings
- 6.6 Electrical Characteristics
- 6.7 Electrical Characteristics VDCDC1
- 6.8 Electrical Characteristics VDCDC2
- 6.9 Electrical Characteristics VDCDC3
- 6.10 Typical Characteristics
- 7 Detailed Description
- 8 Application and Implementation
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文檔支持
- 12機械、封裝和可訂購信息
8.2.3.4 Output Voltage Selection
The DEFDCDC1, DEFDCDC2, and DEFDCDC3 pins are used to set the output voltage for each step-down converter. See Table 6 for the default voltages if the pins are pulled to GND or to Vcc.
Table 6. Voltage Options
| PIN | LEVEL | DEFAULT OUTPUT VOLTAGE | |
|---|---|---|---|
| DEFDCDC1 | VCC | 3.3 V | |
| GND | 2.80 V | ||
| DEFDCDC2 | VCC | 2.5 V | |
| GND | 1.8 V | ||
| DEFDCDC3 | external voltage divider | 0.6 V to VinDCDC3 | |
If a different voltage is needed, an external resistor divider can be added to the DEFDCDC1 or DEFDCDC2 pin as shown in Figure 8:
Figure 8. External Resistor Divider Added When a resistor divider is connected to DEFDCDC1 or DEFDCDC2, the output voltage can be set from 0.6 V up to the input voltage Vbat. The total resistance (R1+R2) of the voltage divider should be kept in the 1 MΩ range in order to maintain a high efficiency at light load. VDEFDCDCx = 0.6V
