Semtech Adds New High-Input Voltage Devices to Buck Converter Family
SC4525A and SC4524A/B feature a maximum 28V input, with high efficiency and tight output voltage regulation
Camarillo, California - February 26, 2008
Semtech Corp. (Nasdaq: SMTC), a leading supplier of analog and mixed-signal semiconductors, today announced the SC4525A , SC4524A and SC4524B, three new step-down (buck) regulators with high input voltage and programmable frequency needed for networking and digital consumer applications.
The SC4525A is an asynchronous 3A step-down converter designed for wide input voltage range of 8.0 to 28V. The SC4524 is a 2A version of the chip with a 3V minimum input voltage and a choice of two maximum input voltage levels, 28V (A) or 16V (B). All three parts feature a programmable oscillator frequency ranging from 200kHz to 2MHz enabling system designers to not only tailor their designs for size versus cost of the external components but also reduce EMI. Two external resistors are used to set output voltages as low as 1V.
The converters are suitable for wide range of applications such as DSL modems, set top boxes, cable modems and digital TVs. The highly accurate reference voltage (±1%) makes them well suited for tightly regulated output voltages, including rails like I/O, memory and most core voltages.
“To date, no high-voltage converter on the market delivers the wide frequency programmability that makes this part so flexible,” said Julius Sarkis, Semtech Product Marketing Manager, Power Management.
All three products feature extensive protection features. In the event of short circuit or over current fault condition, the regulators offer cycle-by-cycle, frequency foldback and hiccup mode current limit. With frequency foldback protection, the devices reduce switching frequency to protect the IC and the load. The programmable soft-start not only reduces input start-up current and prevents the output from overshooting during power-up but also provides system designers with flexibility for power sequencing with different slew rates preventing latch up.
The devices are packaged in a thermally enhanced SOIC-8 package with a temperature range of -40ºC to +85ºC, suitable for use in remote plant applications. They are RoHS and WEEE compliant.
Key Features of the SC4525A and SC4524A/B
- Wide input range of 8V to 28V (SC4525A); from 3V to 28V (SC4524A); and from 3V to 16V (SC4524B)
- 3A output current (SC4525A)
- 2A output current (SC4524A/B)
- 200kHz to 2MHz programmable frequency
- Peak current-mode control
- Cycle-by-cycle current limiting
- Hiccup overload protection with frequency foldback
- Programmable soft-start and enable
- Thermal shutdown
Pricing and Availability
The SC4525A (order code: SC4525ASETRT) is available immediately in production quantities and is priced at $0.42 each in 1,000-piece lots. The SC4524A/B (order code: SC4524XSETRT where X indicates the A or B model) are available immediately in production quantities and are priced at $0.45 each in 1,000-piece lots. Semtech offers comprehensive design assistance, including field- and factory-based support. Data sheets, volume pricing, and delivery quotes, as well as evaluation kits and samples, are available by contacting salesinfo@semtech.com.
About Semtech
Semtech Corporation is a leading supplier of high-quality analog and mixed-signal semiconductor products. The company is dedicated to providing customers with proprietary solutions and breakthrough technology in power management, protection, test & measurement, advanced communications and wireless connectivity products. Publicly traded since 1967, Semtech is listed on the NASDAQ National Market under the symbol SMTC. For more information, contact Semtech Corp. at 200 Flynn Road, Camarillo, CA 93012-8790; phone (805) 498-2111; email to info@semtech.com; or visit its web site at www.semtech.com.
Press Contact
David Rodewald, PR Coordinator, Telephone: 805.494.9508
