MAX8660/MAX8661 Power-Management ICs-EEWORLD

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The MAX8660/MAX8661 power-management ICs (PMICs) provide power (AP) for processors in smart cell phones, PDAs, Internet appliances, and other portable devices.

The chip integrates four step-down DC-DC outputs, three linear regulators, one (eighth) standby power LDO and power management circuits. Two dynamically regulated DC-DCs power the processor core and memory; the other two DC-DC converters power I/O, memory and other peripherals. Other functions include: output switch control, low voltage detection, reset output and 2-wire I?C serial interface. MAX8661 has the same functions as MAX8660, but does not have REG1 step-down regulator and REG7 linear regulator.

All step-down DC-DC converters use high-speed 2MHz PWM switching, allowing the use of smaller external components. They automatically switch from PWM mode to high-efficiency light-load operation mode to reduce operating current and extend battery life. In addition, forced PWM mode maintains low noise operation at any load. Overvoltage lockout prevents the device from input voltage greater than 7.5V.

Key Features

● Optimized for Marvell PXA300 and Armada 100 series processors

● 7.5V overvoltage protection—shutdown protection when higher than 6.3V

● Quad synchronous buck converter

● REG1、REG2、REG3、REG4

● Quadruple LDO regulators

● REG5、REG6、REG7、REG8

● 2MHz PWM switching frequency allows the use of smaller components

● Power consumption is only 20uA in deep sleep state

● Low battery voltage detection and reset output

Simplified Functional Block Diagram

application

Digital camera

● PDAs, handheld computers and wireless handheld devices

● Personal media player

● Portable GPS Navigation System

Smart Cell Phone

Keywords：MAX8660 IC Reference address：MAX8660/MAX8661 Power-Management ICs

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