SP6643 Datasheet (Sipex) - Step-Up DC-DC Converter

SP6643, Step-Up DC-DC Converter

The SP6642/6643 devices are high-efficiency, low-power step-up DC-DC converters for +1V inputs ideal for single alkaline cell applications such as pagers, remote controls, and other low-power portable end products.

Designers can control the SP6642 device with a 1nA active LOW shutdown input.

The SP6

® SP6642/6643 Single Alkaline Cell, High Efficiency Step-Up DC-DC Converter s 20mA Output Current at 1.2V Input s +2V to +5.5V Output Range s 0.85V Guaranteed Start-Up s 83% High Efficiency s 1.5µA Quiescent Supply Current at V BATT s Reverse Battery Protection s Internal Synchronous Rectifier s 5nA Logic Controlled Shutdown Current From VBATT For The SP6642 s Low-Battery Detection Active LOW Output For The SP6643 s Extremely Small µSOIC Package s Pin-to-pin Compatible With M

SP6643 Features

* an active LOW output for low-battery conditions. Both devices contain a 0.8Ω synchronous rectifier, an oscillator, a 0.6Ω N-channel MOSFET power switch, an internal voltage reference, circuitry for pulse-frequency-modulation, and an under voltage comparator. The output voltage for the SP6642/6643 de