Product category: Power Supply ICs and Controllers
News Release from: Fairchild Semiconductor | Subject: Impala Linear products
Edited by the Electronicstalk Editorial Team on 8 October 2001
LDOs feature superior
noise and ripple rejection
Fairchild Semiconductor has unveiled key additions to its product portfolio acquired as a result of the company's recent purchase of Impala Linear Corporation
The acquisition boosts Fairchild's growing product line aimed at power management semiconductors for handheld and portable devices such as laptops, PDAs and cell phones, and complements a rapidly expanding portfolio of small-footprint, micropower power management ICs. The acquisition brings an especially strong offering of LDO voltage regulators and DC/DC convertors featuring industry-leading noise and ripple rejection specifications for cell phones, MP3 players and similar applications.
This article was originally published on Electronicstalk on 8 October 2001 at 8.00am (UK)
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"The integration of Impala Linear's power and analogue products provides a wider variety of solutions for users who need to expand their design capabilities in low-noise, low-power portable computing and communications products", said Rich Wegner, Fairchild's Power Management Product Marketing Manager.
"We have already seen strong design activity for these products under the Fairchild banner, and have begun work on a number of new products that will capitalise on their proven strengths in low-voltage power management".
The acquisition strengthens Fairchild's skill-set by expanding the group's design expertise in micro-power CMOS technology for power management in handheld devices.
Products added to the portfolio which demonstrate these capabilities include the ILC7082, a 150mA low-dropout (LDO) voltage regulator optimised to meet the needs of modern wireless communications design.
With better than 85dB (1kHz) of ripple rejection, ultra low noise of 30uV (RMS) and dropout voltage of 150mV at full load, the ILC7082 sets a new standard in linear regulators for communications and personal electronics applications.
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Also available is the ILC7011, an 80mA ultra-low-noise LDO with ground current less than 90uA at full load, in a 5-lead SC-70 footprint that is half the size of the industry standard SOT23.
The ILC7011 features industry-leading low noise of 20uV, ripple rejection of 70dB and a low dropout voltage of 50mV with a 10mA load.
"In communications applications, the superior ripple rejection and exceptional noise performance of the Impala LDOs makes them the best choice for isolating and partitioning noisy parts of a system from sensitive areas", said Gene Krzywinski, Impala Linear's Vice President of Marketing and Sales.
"Offering these state-of-the-art products allowed Impala to win key designs within the top five cellular phone manufacturers".
Among the list of DC/DC convertors that Impala now brings to Fairchild's long list of switching regulators are two star players: first, capable of 500mA output current, is the ILC6363 step-up/step-down DC/DC switch-mode convertor, ideal for lithium-ion (Li-ion) or other battery types, where the input voltage range spans above and below the regulated output voltage.
Second is the ILC6383 series of step-up DC/DC convertors, designed for wireless communications applications, with a switching frequency of 300kHz to avoid harmonics in the sensitive 455kHz IF band.
Internal synchronous rectification and user selectable PFM/PWM modes in the ILC6383 allows greater than 90% conversion efficiency, at light or full load.
Both devices feature a low battery detect and flag, as well as power good flag, and are available in either fixed or adjustable output voltages.
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