Rainbow-electronics MAX1817 Manual do Utilizador Página 1

General DescriptionThe MAX1817 is a compact, high-efficiency, dual-out-put step-up converter for portable devices that pro-vides both the main logic s

MAX1817Using a Charge Pump to Make Negative LCD Output VoltageThe MAX1817 can generate a negative LCD output byadding a diode-capacitor charge-pump ci

loss in efficiency. Choose a reverse breakdown voltagegreater than the output voltage. Input Bypass CapacitorThe input supplies high currents to the i

MAX1817Compact, High-Efficiency, Dual-Output Step-Up DC-DC ConverterMaxim cannot assume responsibility for use of any circuitry other than circuitry e

MAX1817Compact, High-Efficiency, Dual-Output Step-Up DC-DC Converter2 ________________________________________________________________________________

MAX1817Compact, High-Efficiency, Dual-Output Step-Up DC-DC Converter__________________________________________________________________________________

MAX1817Compact, High-Efficiency, Dual-Output Step-Up DC-DC Converter4 ________________________________________________________________________________

MAX1817Compact, High-Efficiency, Dual-Output Step-Up DC-DC Converter__________________________________________________________________________________

MAX1817Compact, High-Efficiency, Dual-Output Step-Up DC-DC Converter6 ________________________________________________________________________________

________________Detailed DescriptionThe MAX1817 dual step-up converter is designed tosupply the main power and LCD bias for low-power,hand-held device

MAX1817the output voltage rises above the undervoltage thresh-old, the control circuitry is enabled, allowing properregulation of the output voltage.L

Low-Voltage StartupThe MAX1817’s internal circuitry is powered from OUT.The main step-up converter has a low-voltage startupcircuit to control main DC