PRODUCT SUMMARY

SKY77445 Front-End Module for LTE / EUTRAN

Band VII (Tx 2500-2570 MHz), (Rx 2620-2690 MHz)
Applications Description
• Long-Term Evolution (LTE) The SKY77445 Front-End Module (FEM) is a fully matched, 16-pad surface mount module
• Evolved Universal Terrestrial Radio developed for LTE/EUTRAN applications. Small and efficient, this LTE FEM integrates the
Access Network (EUTRAN) interstage filter, input and output matching, power amplifier, power detection, and duplexer
• Handsets and Data Cards into a single 4 mm x 7 mm x 1.1 mm package.

The SKY77445 meets the stringent spectral linearity requirements of LTE with QPSK / 16QAM
Features
modulations from 1.4 MHz to 20 MHz bandwidth and full or partial resource block allocations
• QPSK, 16QAM, 64QAM modulations with high power added efficiency. The FEM incorporates Inter-Stage Filter and Duplexer,
• Up to 20 MHz bandwidths InGaP BiFET PA, and output power detector.
• Up to 100 resource blocks
• Linear power at 3.3 V: Integration of the RF front-end greatly simplifies the design of the 4G-compatible handset
- 25 dBm LTE radio or data card as all critical matching between the interstage filter, PA, power detection,
- 26 dBm WCDMA and duplexer is optimized within the single module component. By optimizing the efficiency
• Duplexer Tx-Rx attenuation and of the InGaP BiFET PA MMIC, reducing RF loss between the integrated components and
isolation: 49 dB within the Duplexer itself, and improving the match between the PA and the Duplexer, this
• Integrated Power Detector, FEM achieves low current at maximum output power that significantly reduces the power
interstage filter and duplexer dissipated in the LTE-enabled handsets or data cards.
• Low voltage positive bias supply:
3.0 V to 4.6 V Primary bias to the SKY77445 is supplied via the VCC1 and VCC2 pads directly from a three-
• Supports low collector voltage cell Ni-Cad, a single-cell Li-Ion, or other suitable battery with output in the 3.0 V to 4.6 V
operation down to 1.5 V range, while the bias network is powered up with the VCCB pad. DC-DC converter operation
• Excellent linearity, efficiency can be supported with lower power operation down to 1.5 V.
• Large dynamic range
Power down is accomplished by setting a logic low level on the VEN pad. No external supply
• Low Profile 16-pad package: side switch is needed as typical “off” leakage is 10 μA with full primary voltage supplied
4 mm x 7 mm x 1.1 mm
from the battery (VBA = 0 V). The VMODE pad is used to switch between high and low power
• Analog bias current control in low modes to reduce current consumption and gain in the back-off conditions. VBA is used to
power mode using VBA pad
further control the current consumption in the low power mode.
• InGaP BiFET technology
This small package uses Skyworks’ low cost, multi-laminate substrate technology and is
approximately half the size of individually packaged component solutions. The SKY77445
front-end module can save handset and data card designers significant board space and
design-cycle time, and significantly simplify supply chain and sourcing of RF components.

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
200871D • Skyworks Proprietary and Confidential Information. • Products and product information are subject to change without notice. • December 1, 2009 1
PRODUCT SUMMARY SKY77445 FRONT-END MODULE for LTE / EUTRAN
BAND VII Tx (2500-2570 MHz), Rx (2620-2690 MHz)

Figure 1. SKY77445 Functional Block Diagram

Ordering Information
Model Number Manufacturing Part Number Product Revision Package Operating Temperature
SKY77445 SKY77445 MCM 4 mm x 7 mm x 1.1 mm –20 °C to +85 °C

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Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
2 December 1, 2009 • Skyworks Proprietary and Confidential Information. • Products and product information are subject to change without notice. • 200871D