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LT1615 ×Ö¿âIC

DESCRIPTIO

The LT? 1615/LT1615-1 are micropower step-up DC/DC converters in a 5-lead SOT-23 package. The LT1615 is designed for higher power systems with a 350mA current limit and an input voltage range of 1.2V to 15V£¬ whereas the LT1615-1 is intended for lower power and single-cell applications with a 100mA current limit and an extended input voltage range of 1V to 15V. Otherwise£¬ the two devices are functionally equivalent. Both devices feature a quiescent current of only 20?A at no load£¬ which further reduces to 0.5?A in shutdown. A current limited£¬ fixed offtime control scheme conserves operating current£¬ resulting in high efficiency over a broad range of load current. The 36V switch allows high voltage outputs up to 34V to be easily generated in a simple boost topology without the use of costly transformers. The LT1615¡¯s low off-time of 400ns permits the use of tiny£¬ low profile inductors and capacitors to minimize footprint and cost in space-conscious portable applications.

FEATURES

¡ö Low Quiescent Current£º 20?A in Active Mode ¡¶1?A in Shutdown Mode ¡ö Operates with VIN as Low as 1V ¡ö Low VCESAT Switch£º 250mV at 300mA ¡ö Tiny 5-Lead SOT-23 Package ¡ö Uses Small Surface Mount Components ¡ö High Output Voltage£º Up to 34V

APPLICATIO

¡ö LCD Bias ¡ö Handheld Computers ¡ö Battery Backup ¡ö Digital Cameras