Power Electronics

LDO Operates with Inputs Down to 1.7 V

Linear Technology announces the LTC3035, a 300-mA very low dropout (VLDO) linear regulator with input voltage capability down to 1.7 V. Featuring a low internal reference voltage with corresponding adjustable output voltage operation from 0.4 V to 3.6 V, the device also maintains an extremely low dropout voltage of only 45 mV at full load current.

To allow operation at low input voltages, the device includes an integrated charge pump converter that provides the necessary headroom for the internal LDO circuitry. This low input voltage capability enables performance in applications ranging from Li-Ion or two AA alkaline cells to low input to low output voltage conversion systems. The LTC3035 has a ±2% output voltage accuracy, and low quiescent and shutdown currents of 100 µA and 1 µA, respectively.

Fast transient response and a small solution footprint with few external components make it suitable for battery-powered handheld devices such as Bluetooth-enabled devices, cellular phones, media players, handheld medical and industrial instruments. The regulator optimizes stability and transient response with low ESR, ceramic output capacitors as small as 1µF. Internal safety circuitry includes short-circuit and reverse output current protection, plus output current and thermal limiting.

The LTC3035EDDB in the 8-lead DFN 3-mm × 2-mm × 0.75-mm package is available now. Pricing starts at $1.29 each in 1000-piece quantities.

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