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SKY77731 Datasheet(PDF) 1 Page - Skyworks Solutions Inc.

Part No. SKY77731
Description  Low voltage positive bias supply 3.2 V to 4.2 V
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Maker  SKYWORKS [Skyworks Solutions Inc.]
Homepage  http://www.skyworksinc.com

SKY77731 Datasheet(HTML) 1 Page - Skyworks Solutions Inc.

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Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202718B • Skyworks Proprietary and Confidential Information. • Products and product information are subject to change without notice. • August 30, 2013
SKY77731 SkyHi™ Power Amplifier Module for WCDMA / LTE
Band 11 (1427.9–1447.9 MHz) and Band 21
(1447.9–1462.9 MHz)
• WCDMA handsets
• Low voltage positive bias
supply 3.2 V to 4.2 V
• Good linearity
• High efficiency
• Large dynamic range
• Small, low profile package
- 3 mm x 3 mm x 0.9 mm
- 10-pad configuration
• Power down control
• InGaP
• Supports low collector
voltage operation
• Digital Enable
• No VREF required
• CMOS compatible control
signals (GPIO)
• Integrated Directional
• Internal blocking caps
- RF I/O ports
The SKY77731 SkyHi™ Power Amplifier Module (PAM) is a fully matched 10-pad surface mount
module developed for Wideband Code Division Multiple Access (WCDMA) and Long Term Evolution
(LTE) applications. This small and efficient module packs full coverage of WCDMA / LTE Bands 11 and
21 into a single compact package. Because of high efficiencies attained throughout the entire power
range, the SKY77731 delivers unsurpassed talk-time advantages. The SKY77731 meets the stringent
spectral linearity requirements of High Speed Downlink Packet Access (HSDPA), High Speed Uplink
Packet Access (HSUPA), and Long Term Evolution (LTE) data transmission with high power added
efficiency. An integrated directional coupler eliminates the need for any external coupler.
The Gallium Arsenide (GaAs) Microwave Monolithic Integrated Circuit (MMIC) contains all amplifier
active circuitry, including input and interstage matching circuits. The silicon CMOS support die,
providing precision biasing for the MMIC affords a true CMOS-compatible control interface. Output
match into a 50-ohm load, realized off-chip within the module package, optimizes efficiency and
power performance.
The SKY77731 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 SKY77731 can be supplied directly from any suitable battery
with an output of 3.2 V to 4.2 V, optimal performance is obtained with VCC2 sourced from a DC/DC
power supply adjusted within 0.5 V to 3.4 V based on target output power levels. Power down
executes by setting VENABLE to zero volts. No external supply side switch is needed as typical "off"
leakage is a few microamperes with full primary voltage supplied from the battery.

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