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MAX8667 - First Dual Step-Down DC-DC Converters

Description

The MAX8667/MAX8668 dual step-down converters with dual low-dropout (LDO) linear regulators are intended to power low-voltage microprocessors or DSPs in portable devices.

They feature high efficiency with small external component size.

Features

  • o Tiny, Thin QFN 3mm x 3mm Package o Individual Enables o Step-Down Converters 600mA Guaranteed Output Current on OUT1 1200mA Guaranteed Output Current on OUT2 Tiny Size 2.2µH Chip Inductor (0805) Output Voltage from 0.6V to 3.3V (MAX8668) Ultra-Fast Line and Load Transients Low 25µA Supply Current Each o LDOs 300mA Guaranteed Low 1.7V Minimum Supply Voltage Low Output Noise Ordering Information PART PKG CODE TOP MARK MAX8667ETEAA+ T1633-4 AEQ MAX8667ETEAB+ T1633-4 AFI MAX8667ETEAC+.

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Full PDF Text Transcription

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MAX8667/MAX8668 19-0784; Rev 1; 7/07 EVAALVUAAILTAIOBNLEKIT 1.5MHz Dual Step-Down DC-DC Converters with Dual LDOs and Individual Enables General Description The MAX8667/MAX8668 dual step-down converters with dual low-dropout (LDO) linear regulators are intended to power low-voltage microprocessors or DSPs in portable devices. They feature high efficiency with small external component size. The step-down converters are adjustable from 0.6V to 3.3V (MAX8668) or factory preset (MAX8667) with guaranteed output current of 600mA for OUT1 and 1200mA for OUT2. The 1.5MHz hysteretic-PWM control scheme allows for tiny external components and reduces no-load operating current to 100µA with all outputs enabled. Dual low-quiescent-current, low-noise LDOs operate down to 1.7V supply voltage.
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