LT1947EMS#PBF

LT1947 is a highly integrated multiple output DC/DC converter designed for use in TFT-LCD panels. This device contains two independent switching regulators. The main regulator has an adjustable output voltage with an internal 1.1A switch that can generate a boosted voltage as high as 30V. The second regulator’s output is also adjustable up to 30V and can deliver 10mA for positive bias. A simple level-shift charge pump off the main switch node generates the negative bias voltage. An external capacitor sets the delay time from AVDD’s final value to the rising edge at the VON pin. It is widely used in application such as TFT-LCD notebook display panels, TFT-LCD desktop monitor display panels, digital cameras, handheld computers etc.

• Develops three outputs from a 3.3V or 5V supply
• Externally programmable VON delay, all ceramic capacitors
• Fixed frequency low noise outputs
• Fast transient response, few external components required
• Input voltage range is 2.7V to 8V
• Adjustable AVDD and VON voltages
• Oscillator frequency is 3MHz typical
• Supply current is 9.5mA typical at (SHDN = 2.4V)
• Operating temperature is -40°C to 85°C
• Package style is 10-lead plastic MSOP

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