DESCRIPTION
The LT ®1949 is a fixed frequency step-up DC/DC converter with a 1A, 0.5Ω internal switch. Capable of generating 10V at 175mA from a 3.3V input, the LT1949 is ideal for generating bias voltages for large screen LCD panels. Constant frequency 600kHz operation results in a low noise output that is easy to filter and the 30V switch rating allows output voltage up to 28V using a single inductor. An external compensation pin gives the user flexibility in optimizing loop compensation, allowing small low ESR ceramic capacitors to be used at the output. The 8-lead MSOP and SO packages ensure a low profile overall solution.

FEATURES
■ 1A, 0.5Ω, 30V Internal Switch
■ Operates with VIN as Low as 1.5V
■ 600kHz Fixed Frequency Operation
■ Low-Battery Detector Stays Active in Shutdown
■ Low VCESAT Switch: 410mV at 800mA
■ Pin-for-Pin Compatible with the LT1317B
■ Small 8-Lead MSOP and SO Packages

APPLICATIONS
■ LCD Bias Supplies
■ GPS Receivers
■ Battery Backup
■ Portable Electronic Equipment
■ Diagnostic Medical Instrumentation