MAX1676EUB [Maxim]

The MAX1674/MAX1675/MAX1676 are compact, high-efficiency, step-up DC-DC converters that fit in small µMAX packages. They feature a built-in synchronous rectifier, which improves efficiency and reduces size and cost by eliminating the need for an external Schottky diode. Quiescent supply current is only 16µA. The input voltage ranges from 0.7V to VOUT, where VOUT can be set from 2V to 5.5V. Start-up is guaranteed from 1.1V inputs. The devices have a preset, pin-selectable output for 5V or 3.3V, and can also be adjusted to other voltages using two external resistors. All three devices have a 0.3Ω N-channel MOSFET power switch. The MAX1674 has a 1A current limit, the MAX1675 has a 0.5A current limit, and the MAX1676 features an adjustable current limit and circuitry to reduce inductor ringing.