LT1109ACS8-12#PBF

LT1109ACS8-12#PBF is a simple step-up DC/DC converter. The current drain is just 360 µA at no load, making the device ideal for cost-sensitive applications where standby current must be minimized. The LT1109A-12 can deliver 12V at over 150 mA from a 5V supply, providing sufficient power to program four flash memory chips simultaneously. This device features a shutdown pin that turns off the oscillator when pulled low. Its gated oscillator design eliminates the need for frequency compensation components. High-frequency 120 KHz operation allows for the use of small surface-mount inductors and capacitors. Applications include flash memory VPP generators, 5V to 12V converters, 3.3V to 12V converters, disk drives, PC plug-in cards, peripherals, and battery-powered equipment.

• Low cost, uses off-the-shelf inductors, logic-controlled shutdown
• Quiescent current is 360µA typical at (switch off, TA = 25°C)
• Input voltage range from 2V to 9V
• Output voltage ripple is 60mV typical
• Comparator trip point voltage is 1.25V typical
• Oscillator frequency is 120KHz typical at (TA = 25°C)
• Switch saturation voltage is 0.5V typical at (VIN = 3V, ISW = 650mA)
• Duty cycle is 68% typical at (full load, TA = 25°C)
• Switch on time is 5.5µs typical at (TA = 25°C)
• Operating temperature range from 0°C to 70°C, 8-lead plastic SO package

Notes

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