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Intersil's New Family of Dual LDOs Boasts Industry's Highest PSRR Combined with Best-in-Class Noise and Iq Performance
ISL9000/11/12 Provides Best Performance in Low Power and Noise-Sensitive Applications
MILPITAS, CA, October 17, 2005 Intersil Corporation (NASDAQ: ISIL), a world leader in the design and manufacture of high-performance analog solutions, today announced a new family of high-performance dual LDOs (low dropout regulators) that provide ultra-high PSRR (power supply rejection ratio), extremely low quiescent current (Iq), and excellent noise performance for RF/noise-sensitive applications such as imaging sensors for digital still cameras or cellular phone camera modules, MP3 players and portable medical and instrumentation devices.
Intersils ISL9000/11/12 family of LDOs offers a significant performance advantage to our customers in demanding noise-sensitive applications such as cell phone camera modules and digital still camera image sensors. The highest PSRR is necessary to improve image quality, which is increasingly critical as they move toward megapixel resolutions in these applications, said Marc Murphy, product marketing manager of Intersils Handheld Power products group. By using leading-edge technology, we offer a significant advantage over our competitors in overall solution size and provide the industrys best combination of ultra-high PSRR, very low noise, and low quiescent supply current to boost overall performance.
The Highest-Performance Dual LDOs in the Industry
Intersils ISL9000 offers 90dB PSRR at 1KHz, and the quiescent current is typically only 21uA/LDO when active. The output voltage accuracy over temperature is 1.8 percent with a drop-out of typically 200mV at 300mA. Separate enable pins control each individual LDO output. When both enable pins are low, the device is in shutdown, typically drawing less than 0.1uA.
The ISL9000 integrates output voltage sequencing and individual power-on-reset (POR) functions for each output to remove the requirement for separate voltage monitoring/reset circuits. The POR delay for VO2 (voltage output) can be externally programmed by connecting a timing capacitor to the CPOR pin. The POR delay for VO1 is internally fixed at approximately 2ms to ensure voltage stability after start-up. A reference bypass pin is provided for connecting a noise filtering capacitor to increase the noise and PSRR performance.
Intersils ISL9011 and ISL9012 are high-performance dual LDOs capable of sourcing 150mA current from channel 1 and 300mA from channel 2. These devices have low standby current and are stable with output capacitance of 1uF to 10uF with ESR of up to 200mOhms. A reference bypass pin allows an external capacitor for adjusting a noise filter for low-noise and high-PSRR applications.
The ISL9011 and ISL9012 offer PSRR of 70dB at 1kHz and quiescent current is typically only 45uA with both LDOs enabled and active. Separate enable pins control each individual LDO output. When both enable pins are low, these devices are in shutdown mode, typically drawing less than 0.1uA.
Several combinations of voltage outputs are standard on the ISL9000/11/12. Output voltage options for each LDO range from 1.2V to 3.6V. The ISL9011/12 also offer pin compatibility with improved performance of some of the most popular dual LDOs on the market today.
Key Features
- Wide input voltage capability: 2.3V 6.5V
- ISL9000: Very high PSRR: 90dB at 1kHz
- Low output noise: typically 30uVrms at 100uA (1.5V)
- +/-1.8 percent output voltage accuracy over all operating conditions
- ISL9000: Extremely low quiescent current: 21uA per LDO Active
- ISL9000: Low dropout voltage: typically 200mV at 300mA
- Excellent transient response to large current steps
- Excellent load regulation:
- Less than 0.1 percent voltage change across full range of load current
- PDAs, cellular phones and smart phones
- Digital still and video cameras
- Portable instruments, MP3 players
- Other handheld devices, including medical handhelds
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, battery chargers to highly-integrated multiple-output and multi-phase PWMs, to quad-voltage hot-swap controllers. As a leading supplier of PWM controller ICs with over one 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/.
Pricing and Availability
The ISL9000 is available now in a 10-pin, lead-free DFN package and is priced at $1.30, the ISL9011 is available now in a 10-pin, lead-free DFN package and is priced at $1.10, and the ISL9012 is available now in a 10-pin, lead-free DFN package and is priced at $1.15. All prices are in 1,000-unit quantities. More information on the ISL9000 is available at http://www.intersil.com/cda/deviceinfo/0,1477,ISL9000,0.html, more information on the ISL9011 is available at http://www.intersil.com/cda/deviceinfo/0,1477,ISL9011,0.html, and more information on the ISL9012 is available at http://www.intersil.com/cda/deviceinfo/0,1477,ISL9012,0.html. A large selection of power products is supported by Intersils iSim online design tool. To explore these solutions, visit http://www.intersil.com/isim/. To view a broad range of application block diagrams, visit Intersils Application Design Center at http://www.intersil.com/apps.
Note to editors: To view a high-resolution downloadable photo of these products, visit Intersils photo room at: http://www.intersil.com/pressroom/photoarchives.asp. About Intersil
Intersil Corporation, a NASDAQ 100 Index company, is a leader in the design and manufacture of high performance analog semiconductors. The company’s products address three of the industry’s fastest growing markets: flat panel displays, optical storage (CD and DVD recordable) and power management. Intersil products include power management devices for battery management, hot-swap and hot-plug controllers, linear regulators, supervisory ICs, 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 rad-hard 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.
iSim is a trademark of Intersil Corporation. All other brands or product names are trademarks or registered trademarks of their respective holders.
