DC/DC Converter For GSM And GPRS Cards Linear Technology has announced the LTC3125, a 1.6MHz current mode, synchronous boost DC/DC converter with an accurate and programmable average input current limit. Its internal 1.2A switches can deliver output voltages as high as 5.25V from an input voltage range of 1.8V to 5.5V, making it ideal for Li-ion/polymer, 3.3V PC card slot or multi-cell alkaline/Nimh applications. The LTC3125 can deliver up to 500mA of continuous output current (at 5V) from a 3.3V input. The LTC3125's average input current limit can be programmed between 200mA and 1000mA with +/- 5 per cent accuracy. The accurate adjustable current limit combined with an output reservoir capacitor makes the LTC3125 ideal for applications such as GSM and GPRS cards, which demand 2A or higher current pulses from a power-limited input source. In addition, the LTC3125's accurate input current enables safe and fast charging of large super- or ultra-capacitors in battery backup sy...
Posts
Showing posts with the label GPRS