• Product introduction

LT1109CS8-12

Adjustable and fixed 5V, 12V for micro low cost DC/DC converters

peculiarity

• Take advantage of closed, off-the-shelf inductors
• Only 33μH inductor
• Low cost
• 3-pin TO-92 package, SO8 package, 8-pin DIP
• Adjustable or fixed 5V or 12V output
• Adjustable or fixed 5V or 12V output
• There are only three external components
• IQ of 320 μA
• Minimum start-up voltage of 1.6V
• Logic controls shutdown

description

The LT1109 is a simple step-up DC/DC converter. Available in 8-pin packages, 3-pin TO-92 (fixed output) or miniDIP packages, the device requires only three external components to build a complete DC/DC converter. Current consumption is only 320#181; An ideal device for cost-sensitive applications where standby current must be kept to a minimum at no load. The LT1109-5 can deliver 5V 3V inputs and the LT1109-12 can deliver 12V from a 5V input at 60mA at 100mA. The 8-pin version also features a logic control to shut down the oscillator when the shutdown pin is low. The gated oscillator design requires no frequency compensation components. A high-frequency 120kHz oscillator that allows the use of small surface-mount inductors and capacitors. The 120 mA converter is seen at 5V to 12V, see the LT1109A. FOA A 5V to 12V 20μA shutdown current in a 200mA converter, seen on the LT1301.