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.

Features

● Under-voltage lockout protection

● Totem pole output

● Output short circuit protection

● Incorporates soft start function

● Wide operating frequency： 10kHz to 1MHz

● Shut down control

● Low dissipation current : Typical 1.6mA in operation

● Sop-8 & Tssop-8 package available