News & Events
Intersil DC/DC Converter Optimized for Powering Cell Phone RF Power Amplifiers
ISL9109 is Optimized For Quick Turn-on With Only 22 Microamps of Quiescent Current and Excellent Transient Load Response in a Small 2mm x 3mm DFN Package
MILPITAS, CA, September 29, 2008 Intersil Corporation (NASDAQ Global Select: ISIL), a world leader in the design and manufacture of high-performance analog semiconductors, today announced a new DC/DC converter for RF power amplifiers that provides the industrys fastest start up from standby mode with very low current and excellent transient load response.
The new ISL9109 is a 1.6MHz synchronous step-down regulator designed to resolve the inefficiencies often seen with mobile RF power amps, particularly at low output levels. The device incorporates power switches that deliver 1.5A output and features a standby mode that enables rapid startup.
This rapid startup is achieved even though the part draws only 22 microamps standby current (typical) and provides the highest possible light load efficiency while reducing power draw and maximizing battery. When powered from a Li-ion battery, the ISL9109 operates at 90-95% efficiency in powering an RF PA.
The ISL9109s supply voltage ranges from 2.7V to 5.5V enable designers to use a single Li+ cell, three NiMH cells or a regulated 5V input. The ISL9109s 1.6MHz pulse-width modulation (PWM) switching frequency also allows the use of small external components. When in standby, the ICs band-gap reference is powered up, which assists in a rapid power-up when the EN (enable) pin is reasserted high.
Other features of the ISL9109 include soft-start, overcurrent protection and thermal shutdown. In addition, its small 2mm x 3mm DFN form factor saves space in any cell phone or modem card design. The complete converter occupies less than one centimeter squared.
Pricing and Availability
The
ISL9109 is available now in 8-Ld DFN packages and are priced at $1.93 each
in 1,000-piece quantities.
For more ISL9109 information, go to http://www.intersil.com/cda/deviceinfo/0,1477,ISL9109,0.html.
Note to editors: To view a high-resolution downloadable photo of the
ISL9109,
visit Intersils photo room at:
http://www.intersil.com/pressroom/photoarchives.asp.
About Intersils Power Management Portfolio
Intersil is a recognized global leader in power management solutions, offering a
broad portfolio of products that simplify a variety of power designs. Intersils
family of power management ICs ranges from building blocks such as charge pumps,
to highly-integrated, multiple-output and multiphase PWMs, to quad-voltage
hot-swap controllers. As a leading supplier of PWM controller ICs with over two
billion units shipped, Intersil addresses a broad range of power management
needs for applications that include computing, communications, peripherals,
display, networking, telecommunications, industrial, instrumentation and
battery-powered products. To learn more, visit Intersils Power Management Web
site at http://www.intersil.com/power.
About Intersil
Intersil Corporation is a leader in the design and manufacture of high-performance analog semiconductors. The Company's products address some of the industry's fastest growing markets, such as, flat panel displays, cell phones, other handheld systems, and notebooks. Intersil’s product families address power management functions and analog signal processing functions. Intersil products include ICs for battery management, hot-swap and hot-plug controllers, linear regulators, power sequencers, supervisory ICs, bridge drivers, PWM controllers, switching DC/DC regulators and power MOSFET drivers; optical storage laser diode drivers; DSL line drivers; video and high-performance operational amplifiers; data converters; interface ICs; analog switches and multiplexers; crosspoint switches; voice-over-IP devices; and ICs for military, space and radiation-hardened applications. For more information about Intersil or to find out how to become a member of our winning team, visit the Company's web site and career page at www.intersil.com.
