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L99PM72GXP Datasheet(PDF) 14 Page - STMicroelectronics |
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L99PM72GXP Datasheet(HTML) 14 Page - STMicroelectronics |
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14 / 129 page  Detailed description L99PM72GXP 14/129 DocID024767 Rev 4 2.1.3 Increased output current capability for voltage regulator V2 For applications, which require high output currents, the output current capability of the regulator can be increased my means of the integrated operational amplifiers and an external pass transistor. Figure 3. Voltage source with external PNP Figure 4. Voltage source with external PNP and current limitation Figure 3 shows a possible configuration with a PNP pass element using Voltage Regulator 2 to provide the voltage reference for the regulated output voltage V3. The VS operating range for this circuit is 5.5 V to 18 V. It is important respect the input common mode range specified for the operational amplifiers. The output voltage V3 can be calculated using the following formula (for R3 = R4): V 3 V 2 2 ------- R 1 R 2 + R 2 --------------------- V [] ⋅ = |
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