Advanced Analog Technology, Inc.
AAT1109
Details are subject to change without notice.
ONE-CHANNEL STEP-UP PWM CONTROLL...
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.
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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
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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...