AAT1109A Datasheet | Advanced Analogic Technologies

Advanced Analog Technology, Inc. Preliminary and Provisional ONE-CHANNEL BOOST SWITCHING REGULATOR Features z z z z z z z z Under-voltage lockout protection Totem pole output Output short circuit protection Incorporates soft start function Wide operating frequency¡G 10k Hz to 1MHz Shut down control Low dissipation current : Typical 1.6m A in operation Sop-8 & Tssop-8 package available General Description The AAT1109A is a one-channel switching regulator control IC incorporating a soft start function and a short circuit protection function. Each device consists of an on-chip voltage reference, error amplifier, pulse width modulation controller, under-voltage protection, soft start and short circuit protection circuits. Switching frequencies up to 1MHz are set by an external resistor and capacitor. Soft-start time can be implemented by the SCP capacitor. Additionally, a chip enable feature is provided to power down reducing the supply current to 10u A. With a minimum number of external ponents, the AAT1109A offers a simple and cost effective solution. Pin Configuration TOP VIEW -IN SCP Vcc CE 1 2 3 4 8 7 6 5 FB OSC GND OUT (SOP-8 PACKAGE) (TSSOP-8 PACKAGE) - - x - ÆWÃþ¤ñ¬ì- ÞªÑ- ÷¦³-½q - Advanced Analog Technology, Inc. - V 0.1 Advanced Analog Technology, Inc. Pin Description Pin # 1 2 3 4 5 6 7 8 Name -IN SCP Vcc CE OUT GND OSC FB I/O Description I Error amplifier inverting input pin I Soft start and SCP capacitor connection pin Power supply I Chip enable input pin¡] internal pull "H"¡^ O Totem-type output pin Ground O Capacitor and resistor connection pin for setting the oscillation frequency O Error amplifier output...