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Part Number
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MAX679 |
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Manufacturer
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Maxim |
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Description
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Regulated 3.3V Charge Pump |
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Published
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May 2, 2005 |
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Detailed Description
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19-1217; Rev 0; 4/97
Regulated 3.3V Charge Pump
_______________General Description
The MAX679 step-up, regulated charge...
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Datasheet
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MAX679
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Overview
19-1217; Rev 0; 4/97
Regulated 3.
3V Charge Pump
_______________General Description
The MAX679 step-up, regulated charge pump generates a 3.
3V ±4% output voltage from a 1.
8V to 3.
6V input voltage (two alkaline, NiCd, or NiMH; or one Lithium-Ion battery).
Output current is 20mA (min) from a 2.
0V input.
Only three external capacitors are needed to build a complete DC-DC converter.
The MAX679’s switching frequency is pin selectable at 330kHz or 1MHz to allow trade-offs between lowest supply current and smallest-size capacitors.
The logic shutdown function reduces the supply current to 5µA (max) and disconnects the load from the input.
Special soft-start circuitry prevents excessive current from...
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