SKY77336 Datasheet, PDF (1/2 Pages) Skyworks Solutions Inc. – Power Amplifier Module for Quad-Band GSM/GPRS/EDGE

PRODUCT SUMMARY
SKY77336 Power Amplifier Module for Quad-Band
GSM / GPRS / EDGE
Applications
• Quad-band cellular
handsets
• GMSK Modulation
- Class 4 GSM850/900
- Class 1 DCS1800/
PCS1900
- Class 12 GPRS multi-slot
operation
• EDGE modulation
- Class E2 GSM850/900
- Class E2 DCS1800/
PCS1900
Features
• High efficiency:
- GSM850, 52%
- GSM900, 52%
- DCS, 50%
- PCS, 50%
• Small outline
- 5 x 5 mm
• Low profile
- 0.9 mm, max
• Low VRAMP current
- 10 μA
Description
SKY77336 Power Amplifier Module (PAM) is designed in a compact form factor for quad-band cellular
handsets comprising GSM850/900, DCS1800 and PCS1900, supporting Gaussian Minimum-Shift
Keying (GMSK) and Polar Enhanced Data for GSM Evolution (EDGE) modulation. Class 12 General
Packet Radio Service (GPRS) multi-slot operation is also supported.
The module consists of GSM850/900 PA and DCS1800/PCS1900 PA blocks, impedance matching
circuitry for 50 Ω input and output impedances, and a Power Amplifier Control (PAC) block. The
custom CMOS integrated circuit provides the internal PAC function and interface circuitry. Fabricated
in InGaP/GaAs, the Heterojunction Bipolar Transistor (HBT) PA blocks support the GSM850/900 bands
and DCS1800/PCS1900 bands. Both PA blocks share common power supply pads to distribute
current. The InGaP/GaAs die, Silicon (Si) controller die, and passive components are mounted on a
multi-layer laminate substrate and the entire assembly is encapsulated with plastic overmold.
RF input and output ports of the SKY77336 are internally matched to a 50 Ω load to reduce the
number of external components for a quad-band design. Extremely low leakage current
(10 μA, typical) of the PAM module maximizes handset standby time.
The SKY77336 also contains band-select switching circuitry to select GSM (logic 0) or DCS/PCS
(logic 1) as determined from the Band Select (BS) signal. See Figure 1 shown below.
Figure 1. SKY77336 Functional Block Diagram
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
200889C • Skyworks Proprietary and Confidential information. • Products and product information are subject to change without notice. • March 2, 2009
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