SKY77778-21 Datasheet, PDF (1/2 Pages) Skyworks Solutions Inc. – Power Amplifier Module for LTE FDD Band 7

PRODUCT SUMMARY
SKY77778-21 Power Amplifier Module for LTE FDD Band 7
(2500–2570 MHz), and TDD Bands 38/41 (2496–2690 MHz),
Band 40 (2300–2400 MHz), AXGP Band (2545–2575 MHz)
Applications
• Long-Term Evolution (LTE)
• Evolved Universal
Terrestrial Radio Access
Networks (EUTRAN)
• Handsets and Data Cards
Features
• Performance optimized for
FDD Band 7, AXGP Band,
and coverage in TDD Bands
38, 40, and 41
• Optimized for Average
Power Tracking (APT) /
Compatible with Envelope
Tracking Controller (ETC)
implementation
• High efficiency Broadband
2.3 GHz to 2.69 GHz
• Up to 20 MHz bandwidth
• Small, low profile package
- 2 mm x 2.5 mm x 0.9 mm
- 10-pad configuration
• MIPI interface
• VCC2 decoupling caps
< 125 pF
Description
The SKY77778-21 Power Amplifier Module (PAM) is a fully matched, 10-pad surface mount (SMT)
module developed for LTE applications. The module includes broadband coverage of LTE FDD Band 7
and TDD Bands 38, 40, 41 and AXGP Band in a compact 2.0 mm x 2.5 mm package. Attaining high
efficiencies throughout the entire power range while meeting the stringent linearity requirements of
LTE, the SKY77778-21 delivers unsurpassed savings in current consumption for data-intensive
applications.
The Gallium Arsenide (GaAs) Microwave Monolithic Integrated Circuit (MMIC) contains all amplifier
active circuitry, including input, interstage, and output matching circuits. Output match into a 50-ohm
load, realized off-chip within the module package, optimizes efficiency and power performance. The
silicon CMOS support die, providing precision biasing for the MMIC affords a true CMOS-compatible
control interface.
The SKY77778-21 is manufactured with Skyworks' InGaP GaAs Heterojunction Bipolar Transistor
(HBT) process which provides for all positive voltage DC supply operation and maintains high
efficiency and good linearity. While primary bias to the SKY77778-21 can be supplied directly from
any suitable battery with an output of 2.5 V to 5.0 V, optimal performance is obtained with VCC2
sourced from a DC-DC power supply based on target output power levels. No external supply side
switch is needed as typical "off" leakage is a few microamperes with full primary voltage supplied
from the battery.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
202929A • Skyworks Proprietary Information. • Products and product information are subject to change without notice. • July 10, 2013
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