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ADP1612/ADP1613 step-up dc-to-dc switching con-verters

Analog Devices release the ADP1612/ADP1613 which are step-up dc-to-dc switching con-verters with an integrated power switch capable of providing an output voltage as high as 20 V.
Because of theirs small packages ADP1612/ADP1613 are optimal for space-constrained applications such as portable devices or thin film transistor (TFT) liquid crystal displays (LCDs).
The ADP1612/ADP1613 operate in current mode pulse-width modulation (PWM) with up to 94% efficiency. Adjustable soft start prevents inrush currents when the part is enabled. The pin-selectable switching frequency and PWM current-mode architecture allow for excellent transient response, easy noise filtering, and the use of small, cost-saving external inductors and capacitors.
Main features of ADP1612/ADP1613 chips are : Current limit 1.4 A for the ADP1612 and 2.0 A for the ADP1613 , Minimum input voltage 1.8 V for the ADP1612 and 2.5 V for the ADP1613 , Pin-selectable 650 kHz or 1.3 MHz PWM frequency , Adjustable output voltage up to 20 V , Adjustable soft start , Undervoltage lockout , Thermal shutdown protection .
ADP1612-ADP1613 step-up dc-to-dc switching con-verters ADP1612-ADP1613-caractericticsADP1612-ADP1613-tft-lcd application circuit

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