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MAX8563：±1%, Ultra-Low Output Voltage, Dual and Triple Linear n-FET Controllers

The MAX8563/MAX8564/MAX8564A ultra-low-output dual and triple LDO controllers allow flexible and inexpensive point-of-load voltage conversion in motherboards, desknotes, notebooks, and other applications. These parts feature a 0.5V reference voltage with ±1% accuracy providing tight regulation of the output voltage. The MAX8563 has three n-channel MOSFET controller outputs, and the MAX8564/MAX8564A has two controller outputs. Each controller output is adjustable from 0.5V to 3.3V when VDD = 12V and between 0.5V and 1.8V when VDD = 5V. Each output is independently enabled and asserts a POK signal when the output reaches 94% of the set value. Each output is protected against a soft short-circuit condition by an undervoltage comparator that disables the output when it drops to under 80% of the set voltage for more than 50µs. For a catastrophic short condition, the regulators are shut down immediately if the output drops below 60% of the set voltage. The MAX8563 is available in a 16-pin QSOP package, and the MAX8564/MAX8564A are available in a 10-pin µMAX® package.

Key Features MAX8563: 3 Outputs MAX8564/MAX8564A: 2 Outputs ±1% Feedback Regulation Adjustable Output Voltage Down to 0.5V Can Use Ceramic Output Capacitors Wide Supply Voltage Range Permits Operation from 5V or 12V Rails Individual Enable Control and POK Signal Allows Sequencing Overload Protection Against Soft Short-Circuit Condition Undervoltage Short-Circuit Protection Drive n-Channel MOSFETs

MAX8563, MAX8564, MAX8564A: Typical Operating Circuit Applications/Uses Desknotes and Notebooks Dual/Triple Power Supplies Graphic Cards Low-Voltage DSP, µP, and Microcontroller Power Supplies Motherboards Ultra-Low-Dropout Voltage Regulators

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Design kits & evaluation modules

• MAX8564EVKIT

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