ANALOG DEVICES LT1949ES8#PBF PWM Controller, Current-Mode, 1.5 to 12V, 600kHz, -40 °C to 85 °C, NSOIC-8

LT1949ES8#PBF is a fixed-frequency step-up DC/DC converter with a 1A, 0.5ohm 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 an output voltage of up to 28V using a single inductor. An external compensation pin gives the user flexibility in optimizing loop compensation, enabling the use of small, low-ESR ceramic capacitors at the output. The LT1949 includes a low-battery detector that remains active when the device goes into shutdown. Applications include LCD bias supplies, GPS receivers, battery backup, portable electronic equipment, and diagnostic medical instrumentation.

• 1A, 0.5ohm, 30V internal switch
• Operates with VIN as low as 1.5V
• Switching frequency is 600KHz typical
• Low-battery detector stays active in shutdown
• Switch VCESAT is 410mV typ (ISW = 800mA, TA = 25°C, VIN = 2V)
• Pin-for-pin compatible with the LT1317B
• Quiescent current is 4.5mA typical
• Input voltage range from 1.7 to 12V
• Error amp voltage gain is 700V/V typ (TA = 25°C)
• 8-lead SO package, operating temperature range from -40°C to 85°C

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party