AAT1109

Advanced Analog Technology, Inc. AAT1109 Details are subject to change without notice. ONE-CHANNEL STEP-UP PWM CONTROLLER FEATURES www.DataSheet4U.com z Under-Voltage GENERAL DESCRIPTION Lockout (UVLO) Protection The AAT1109 is a one-channel step-up PWM controller incorporating a soft-start and a short circuit protection (SCP) function. This device consists of an on-chip voltage reference, error amplifier, pulse width modulation controller, under-voltage lockout protection, soft-start, and short circuit protection circuits. Switching frequency up to 1MHz is set by an external resistor and capacitor. Soft-start time can be implemented by the SCP capacitor. Additionally, a chip-enable feature is also provided to power down and reduce the current supply to 10µA . With the minimal external components, the AAT1109 offers a simple and economical solution. z z z z z z z Totem Pole Output Output Short Circuit Protection Soft-Start Function Wide Operating Frequency¡G 10 kHz to 1MHz Shutdown Control Low Dissipation Current : Typical 1.6mA in Operation SOP-8 & TSSOP-8 Package Available PIN CONFIGURATION ¥ ÆWÃþ¤ñ¬ì§ÞªÑ¥÷¦³-½q – – x – Advanced Analog Technology, Inc. – Page 1 of 18 V 1.0 Advanced Analog Technology, Inc. AAT1109 PIN DESCRIPTION PIN NO. 1 2 3 www.DataSheet4U.com 4 5 6 7 8 NAME I/O DESCRIPTION CE I Chip Enable Input Pin¡] Internal Pull "H"¡^ SCP I Soft-Start and SCP Capacitor Connection Pin VDD - Power Supply OUT O Totem Pole Type Output Pin GND - Ground OSC O Capacit...