ZHCSN49N January 2007 – June 2024
PRODUCTION DATA
- 1
- 1 特性
- 2 應(yīng)用
- 3 說明
- 4 Pin Configuration and Functions
- 5 Specifications
- 6 Detailed Description
- 7 Application and Implementation
- 8 Device and Documentation Support
- 9 Revision History
- 10Mechanical, Packaging, and Orderable Information
封裝選項(xiàng)
機(jī)械數(shù)據(jù) (封裝 | 引腳)
散熱焊盤機(jī)械數(shù)據(jù) (封裝 | 引腳)
訂購信息
7.1.1 Adjusting the Output Voltage
Figure 7-1 shows the typical application circuit for the TPS748 adjustable output device.
Figure 7-1 Typical Application Circuit for the TPS748 (Adjustable)R1 and R2 can be calculated for any output voltage using the formula shown in Figure 7-1. Table 7-1 lists sample resistor values of common output voltages. In order to achieve the maximum accuracy specifications, R2 must be ≤ 4.99 k?.
Table 7-1 Standard 1% Resistor Values
for Programming the Output Voltage(1)
| R1 (k?) | R2 (k?) | VOUT (V) |
|---|---|---|
| Short | Open | 0.8 |
| 0.619 | 4.99 | 0.9 |
| 1.13 | 4.53 | 1.0 |
| 1.37 | 4.42 | 1.05 |
| 1.87 | 4.99 | 1.1 |
| 2.49 | 4.99 | 1.2 |
| 4.12 | 4.75 | 1.5 |
| 3.57 | 2.87 | 1.8 |
| 3.57 | 1.69 | 2.5 |
| 3.57 | 1.15 | 3.3 |
(1) VOUT = 0.8 × (1 + R1 / R2).
Note: When VBIAS and VEN are
present and VIN is not supplied, this device outputs approximately 50 μA
of current from OUT. Although this condition does not cause any damage to the
device, the output current can charge up the OUT node if total resistance between
OUT and GND (including external feedback resistors) is greater than 10 k?.