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MCP16301HT-E/CH Datasheet(PDF) 15 Page - Microchip Technology |
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MCP16301HT-E/CH Datasheet(HTML) 15 Page - Microchip Technology |
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15 / 38 page  2011-2021 Microchip Technology Inc. DS20005004E-page 17 MCP16301/H To calculate the RSH resistor value, the maximum IBOOST and IZ currents are used at the minimum input voltage (Equation 4-2). EQUATION 4-2: SHUNT RESISTANCE VZ and IZ can be found on the Zener diode manufacturer’s data sheet. Typically, IZ =1 mA. Series regulator applications use a Zener diode to drop the excess voltage. The series regulator bias source can be input or output voltage derived, as shown in Figure 4-4. For proper circuit operation, the boost supply must remain between 3.0V and 5.5V at all times. FIGURE 4-4: MCP16301/H Series Regulator Boost Supply. R SH V INMIN V Z – I Boost I Z + ------------------------------ = CB VOUT VIN CIN COUT SW BOOST GND EN FB L RTOP RBOT VIN Boost Diode FW Diode 12V 15V to 36V CB VIN CIN SW BOOST GND EN FB L VIN Boost Diode FW Diode 2V 12V VZ =7.5V VZ =7.5V VOUT RTOP RBOT COUT MCP16301/H MCP16301/H |
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