Monolithic 5-Output Regulator suits TFT-LCD panels.
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Press Release Summary:
Offering 2 MHz switching frequency that keeps switching noise out of critical frequency bands, LT3513 offers 2.2 A (ISW) buck regulator, 1.5 A (ISW) boost regulator, 250 mA (ISW) boost regulator, 250 mA (ISW) inverter, and LDO controller in one 5 x 7 mm QFN package. Each channel has independent soft-start/run pin, and 4.5-30 V input voltage range is suited for TFT-LCD applications. Switching regulator also features fixed-frequency outputs and 3 Schottky diodes.
Original Press Release:
2MHz, Five Output Regulator for TFT-LCD Panels
MILPITAS, CA - October 7, 2008 - Linear Technology Corporation announces the LT3513, a five output monolithic switching regulator packaged in a 5mm x 7mm QFN package. It offers a 2.2A (ISW) buck regulator, a 1.5A (ISW) boost regulator, a 250mA (ISW) boost regulator, a 250mA (ISW) inverter and an LDO controller, all in a single package. Each channel has an independent soft-start/run pin. The LT3513's 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. Its 2MHz switching frequency keeps switching noise out of critical frequency bands, such as AM radio, and ensures tiny externals. Combined with a 5mm x 7mm QFN package, the LT3513 offers a very compact TFT-LCD power solution.
The LT3513's buck regulator can deliver up to 1.2A of output current for logic rails. A lower voltage secondary logic supply may be generated via the LDO controller and an external NPN MOSFET. 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. An integrated high side PNP provides a delayed turn on of the VON signal while Panel Protect circuitry disables VON if any of the four outputs are more than 10% below their programmed voltage, protecting the TFT-LCD panel. Other features include integrated schottky diodes, PGOOD pin for AVDD output disconnect and inductor current sense for the buck regulator.
The LT3513EUHF is available from stock in a 38-lead 5mm x 7mm QFN package. Pricing starts at $4.25 each in 1,000-piece quantities. An industrial grade version, the LT3513IUHF, is tested and guaranteed to operate from a -40°C to 125°C operating junction temperature and is priced at $5.00 each in 1,000-piece quantities. All versions are available from stock.
Summary of Features: LT3513
4.5V to 30V Input Voltage Range
Four Integrated Switches: 2.2A Buck, 1.5A Boost, 0.25A Boost, 0.25A Inverter (Guaranteed Minimum Current Limit)
External NPN LDO Driver
Fixed Frequency, Low Noise Outputs
Inductor Current Sense for Buck
Soft-Start for All Outputs
Externally Programmable VON Delay
Three Integrated Schottky Diodes
PGOOD Pin for AVDD Output Disconnect
PanelProtect(TM) Circuitry Disables VON upon Fault
Thermally Enhanced 38-Lead 5mm x 7mm QFN Package
2MHz Five Output Regulator for TFT-LCD Panels
About Linear Technology
Linear Technology Corporation, a manufacturer of high performance linear integrated circuits, was founded in 1981, became a public company in 1986 and joined the S&P 500 index of major public companies in 2000. Linear Technology products include high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits, uModule(TM) products, and many other analog functions. Applications for Linear Technology's high performance circuits include telecommunications, cellular telephones, networking products such as optical switches, notebook and desktop computers, computer peripherals, video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer products such as digital cameras and MP3 players, complex medical devices, automotive electronics, factory automation, process control, and military and space systems. For more information, visit www.linear.com.
LT, LTC and LTM are registered trademarks and uModule is a trademark of Linear Technology Corp. All other trademarks are the property of their respective owners.
