Semtech Debuts Digitally Programmable Power Management ICs with Nine Ultra-Low Dropout Regulators; Family of I2C Devices Provides Complete Power Management Solution for Digital and Analog Sections of Cellular Phones from a Li-Ion Battery Input

Business Wire, June 2, 2006

CAMARILLO, Calif. -- Semtech Corp. (Nasdaq:SMTC), a leading supplier of analog and mixed-signal semiconductors for communications, portable devices, computers, and industrial equipment, today announced the SC905 family of power management ICs (PMICs) for cell phones and multi-function portable devices. These ICs feature nine ultra low dropout (ULDO) regulators capable of sourcing up to 300mA from multiple inputs via an I2C serial interface, offering great design flexibility. E[acute accent]Each ULDO's output current and output noise is specifically optimized to match the handset's baseband functions: microprocessor core, analog, keypad, receiver, transmitter, VCO, PLL, camera, and vibrator motor. The SC905 and SC905A also include battery charger IC control when paired with Semtech's stand alone battery chargers to provide a complete, cost-effective power regulation solution. E[acute accent]"Smart phone designs constantly add new features that require more power rails than supplied by power management ICs. Cell phone designers want a power solution that gives them the freedom to accommodate new loads or voltage levels and that fits in increasingly smaller designs," said Ven Shan, Vice President of Marketing for Semtech's Power Management Products. "The SC905 and SC905A are mini PMICs that are I2C programmable to generate the output voltages for enabling compact, feature-rich cell phone designs." E[acute accent]Five of the ULDOs on the SC905 can generate low noise outputs in the 2.55V to 2.9V range to power noise-sensitive analog circuitry such as audio, radio frequency or oscillator circuits. Three of the other regulators generate outputs in the 1.35V to 2.9V voltage range and are designed for powering digital circuits. One additional ULDO can drive up to 150mA (between 1.35V to 2.9V) to be used as a general supply or as a vibrator motor supply. E[acute accent]The SC905A offers the same combination of low noise and general purpose ULDOs, but offers expanded input/output voltage ranges for select ULDOs (output range up to 3.3V) allowing it to support a larger variety of CDMA chipsets. The SC905A also contains a dedicated enable pin for the vibrator motor regulator and transceiver output. E[acute accent]The devices come with a power-on control pin for on/off control of the baseband processor, oscillator, keypad and audio. Two other pins are available to power up the device when connected to a battery charger or hands-free kit. The SC905 and SC905A feature six independent input supply pins for connection from either the battery directly or other power sources minimizing regulator input-to-output voltage drops and improving overall efficiency.

E[acute accent]Key Features of the SC905(A)

E[acute accent]--Five low-noise ULDOs for analog power

E[acute accent]--Four general purpose ULDOs for digital power

E[acute accent]--Battery charger IC interface

E[acute accent]--Integrated power-on control circuitry

E[acute accent]--100ms power-on reset timer

E[acute accent]--Less than 1uA quiescent current in shutdown

E[acute accent]--Short-circuit and over-temperature protection

E[acute accent]--5 mm x 5 mm MLP-32 package

E[acute accent]Pricing and Availability

E[acute accent]The SC905 and SC905A are available immediately in production quantities and are priced at $2.44 each in 1,000-piece lots. Ordering codes are SC905MLTRT for the SC905 and SC905AMLTRT for the SC905A. 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.

E[acute accent]About Semtech

E[acute accent]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, advanced communications, human interface, test & measurement, 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.

E[acute accent]Semtech and the Semtech logo are marks of Semtech Corporation.