250 mA Charge Pump Offered In MP-Grade Temperature Range

A new MP-grade, wider temperature range version of Linear Technology’s LTC3245 250 mA high voltage buck-boost charge pump uses switched capacitor fractional conversion to maintain regulation over an input voltage of 2.7 V to 38 V and produces a regulated output of 3.3 V, 5 V or adjustable (2.5 V to 5 V). Internal circuitry automatically selects a conversion ratio of 2:1, 1:1 or 1:2 to optimize efficiency as input voltage and load conditions vary. The operating junction temperature range is -55°C to +150°C, and with an operating current of 18 μA with no load (4 μA in shutdown) and low external device count, the charge pump is suited for low power, space constrained applications such as ECU/CAN transceiver supplies, industrial housekeeping supplies and efficient low power 12 V to 5 V conversion. Pin selectable Burst Mode operation enables the trade off of low output ripple for better efficiency and lower quiescent current. The LTC3245 MP grade charge pump, in a compact 12-lead MSOP package with a backside thermal pad, is available from stock with prices starting at $7.55 each/1,000.

LINEAR TECHNOLOGY CORPORATION