Rainbow-electronics MAX8620 User Manual

General DescriptionThe MAX8620Y micro-power-management integratedcircuit (µPMIC) powers low-voltage microprocessors orDSPs in portable devices. The µP

MAX8620YLDO Output-Voltage Selection (SEL1, SEL2)As shown in Table 1, the LDO output voltages, OUT1and OUT2, are set according to the logic states ofS

Hands-Free Enable Input (HF_PWR)A rising edge at HF_PWR generates an internal one-shot pulse that enables the MAX8620Y for 1.31s (tHF). IfHF_PWR remai

MAX8620YReset Output (RESET)RESET is an open-drain, active-low output that indi-cates the status of OUT1. RESET is typically pulled upthrough a 100kΩ

If a long-key press is preferred, see Figure 6. PWR_ONmust remain high until a microprocessor asserts a logic-high signal when using this circuit. If

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MAX8620YConnect GND to the ground plane. The external feed-back network should be very close to the FB pin, within0.2in (5mm). Keep noisy traces, such

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MAX8620YµPMIC for Microprocessors or DSPs in Portable EquipmentMaxim cannot assume responsibility for use of any circuitry other than circuitry entire

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Voltage-Positioning Load RegulationAs seen in Figure 2, the MAX8620Y uses a unique step-down converter feedback network. By taking feedbackfrom the LX