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MAX1556A

1.2A PWM Step-Down DC-DC Converters - Maxim Integrated

MAX1556A PDF File

Description

MAX1556/MAX1556A/MAX1557 19-3336; Rev 3; 1/11 EVAALVUAAILTAIOBNLEKIT 16µA IQ, 1.
2A PWM Step-Down DC-DC Converters General Description The MAX1556/MAX1556A/MAX1557 are low-operatingcurrent (16µA), fixed-frequency step-down regulators.
High efficiency, low-quiescent operating current, low dropout, and minimal (27µA) quiescent current in dropout make these converters ideal for powering portable devices from 1-cell Li-ion or 3-cell alkaline/NiMH batteries.
The MAX1556 delivers up to 1.
2A; has pinselectable 1.
8V, 2.
5V, and 3.
3V outputs; and is also adjustable.
The MAX1557 delivers up to 600mA; has pinselectable 1V, 1.
3V, and 1.
5V outputs; and is also adjustable.
The MAX1556/MAX1556A/MAX1557 contain a low-onresistance internal MOSFET switch and synchronous rectifier to maximize efficiency and dropout performance while minimizing external component count.
A proprietary topology offers the benefits of a high fixedfrequency operation while still providing excellent efficiency at both ligh...

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