Date: 11/10/2008

Power IC with five output regulators for TFT-LCD panels

LT3513 from Linear Technology is a five output monolithic switching regulator with 2.2A buck regulator, a 1.5A boost regulator, a 250mA boost regulator, a 250mA inverter and an LDO controller, all in single package.

The key features are,

1. Each channel has an independent soft-start/run pin.
2. The input voltage range of 4.5V to 30V makes it ideal for a wide array of TFT-LCD applications, including automotive, industrial and unregulated wall transformer-based systems.
3. Its 2MHz switching frequency keeps switching noise out of critical frequency bands, such as AM radio, and ensures tiny externals.
4. built in buck regulator can deliver up to 1.2A of output current for logic rails.
5. External NPN LDO Driver.
6. A high power step-up converter (ISW=1.5A), a lower power step-up converter (ISW=250mA) and an inverting converter (ISW=250mA) provide the three independent output voltages: AVDD, VON and VOFF required by LCD panels.
7. An integrated high side PNP provides a delayed turn on of the VON signal.
8. A panel protect circuitry disables VON if any of the four outputs are more than 10% below their programmed voltage, protecting the TFT-LCD panel.
9. Three integrated schottky diodes.
10. PGOOD pin for AVDD output disconnect.
11. Inductor current sense for the buck regulator.

Packaging: 38-lead QFN package
Size: 5mm × 7mm

Pricing: $4.25 each in 1K-piece quantities for LT3513EUHF.
An industrial grade version, LT3513IUHF, operate from a -40°C to 125°C operating junction temperature is priced at $5.00 each in 1K-piece quantities.

Availability: All versions are available from stock.

Further details will be available in the website: http://www.linear.com