MAX679

IN, OUT, SHDN, FSET to GND....................................-0.3V to 6V
PGND to GND....................................................................±0.3V
C1- to GND ................................................-0.3V to (VIN + 0.3V)
C1+ to GND.............................................-0.3V to (VOUT + 0.3V)
OUT Short to GND..............................................................10sec
Continuous Power Dissipation (TA = +70°C)
µMAX (derate 4.1mW/°C above +70°C) .......................330mW
Operating Temperature Range .........................-40°C to +85°C
Storage Temperature Range ..........................-65°C to +160°C
Lead Temperature (soldering, 10sec) ............................+300°C

Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, an functiona operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

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 of MAX679 reduces the supply current to 5A (max) and disconnects the load from the input. Special soft-start circuitry prevents excessive current from being drawn from the battery during start-up. This DCDC converter requires no inductors and has low EMI. MAX679 is available in the ultra-small MAX package, which is only 1.11mm high and half the area of an 8-pin SO.