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TS3300ITQ1633T bảng dữ liệu(PDF) 11 Page - Touchstone Semiconductor Inc |
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TS3300ITQ1633T bảng dữ liệu(HTML) 11 Page - Touchstone Semiconductor Inc |
11 / 14 page TS3300 TS3300DS r1p0 Page 11 RTFDS The output voltage can be set via a voltage divider circuit as shown in Figure 2. The output feedback (BO FB) pin is 505mV. It is recommended to use large resistor values to minimize additional current draw at the output. Resistors values less than 8M are recommended. Using the following equation to solve for R1 for a given R2 value, the output voltage can be set: R1= VBO - 0.505 R2 0.505 To set a 3V output voltage with R2 = 1.37M , R1 is calculated to be 6.77M . A 1% standard resistor value of 6.81M can be selected. This results in an output voltage of 3.02V. A shutdown (BEN) pin is also available to shutdown the boost regulator. The boost regulator is in shutdown mode when BEN is LOW and supply current reduces to 0.1µA. LDO Post-Regulator The input and output supply voltage range for the LDO is from 2.3V to 5.25V and 1.8V to 5V, respectively, where the LDO input is driven by the output of the boost regulator. The output voltage can be set via a voltage divider circuit as shown in Figure 3. The output feedback (REG FB) pin is 505mV. It is recommended to use the largest resistor values to minimize additional current draw at the output. Using the following equation to solve for R3 for a given R4 value, the output voltage can be set: R3= VREGOUT - 0.505 R4 0.505 To set a 1.8V output voltage with R4 = 2.61M , R3 is calculated to be 6.69M . A 1% standard resistor value of 6.81M can be selected. This results in an output voltage of 1.82V. Figure 2: Setting the Boost Output Voltage with a Voltage Divider Figure 3: Setting the LDO Output Voltage with a Voltage Divider Figure 4: TS3300 LDO FET/Switch Enabled Circuit |
Số phần tương tự - TS3300ITQ1633T |
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Mô tả tương tự - TS3300ITQ1633T |
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