SKY77432 Datasheet, PDF (1/2 Pages) Skyworks Solutions Inc. – Multi-Mode, Multi-Band Power Amplifier Module for Next Generation GGE and HSPA Handsets

PRODUCT SUMMARY
SKY77432 Multi-Mode, Multi-Band Power Amplifier Module
for Next Generation GGE and HSPA Handsets
Applications
• Quad-band cellular handsets:
- Class 4 GSM850/EGSM900
- Class 1 DCS1800/PCS1900
- Class E2 GSM850/EGSM900
- Class 12 multi-slot EGPRS
• Multi-band 3G handsets
- WCDMA/HSDPA/HSUPA-
modulated handsets for
bands I, II, III, IV, V, VIII
Features
• Load Insensitive Power Amplifier
(LIPA^®) balance architecture for all
modes
• True multi-mode architecture:
common GSM and WCDMA paths
• 4.6 V Buck-Boost DC/DC converter
compatibility/power-control
2.5G features:
• EGPRS Class 12 multi-slot operation
• Linear PA with bias optimization for
efficiency/linearity trade-off in 8-PSK
mode
3G features:
• WCDMA mode supports output
power and bandwidth for bands I, II,
III, IV, V, and VIII
• Linear PA with bias optimization and
Buck DC/DC converter compatibility
to optimize for best efficiency/
linearity trade-off
• Small, low profile package
- 6 mm x 8 mm x 1.1 mm
- 30-pad configuration
• MSL3 260 °C per JEDEC J-STD-020
SMT package
Description
Skyworks SKY77432 is a true multi-mode, multi-band Power Amplifier Module (PAM). The
device is intended to support 2.5G and 3G handsets and operates efficiently in GSM, EGPRS,
EDGE and WCDMA modes.
The SKY77432 consists of separate high-band and low-band GaAs HBT PA blocks, with
matching circuitry for 100 Ω differential input and 50 Ω single-ended output impedances. A
custom CMOS integrated circuit provides mode-specific bias to the GaAs PA die based on the
control logic shown in Table 1.
The module supports a direct power control. Power control and GSM power ramps are
controlled by the Vcc supply only.
The amplifier has two modes: Linear mode used for WCDMA and EDGE transmission, and high
efficiency mode for GSM–GMSK transmission. Mode is controlled by the logic level control
named Mode. The operating frequency band is selected with the logic level control Band. Bias
and control circuits are supplied from VREG and VBAT voltages. The PA is put in to sleep mode by
setting Ibias to 0 μA.
2.5G:
The SKY77432 supports the GSM850, EGSM900, DCS1800, and PCS1900 bands. The device
also supports 2.5G Class 12 Enhanced General Packet Radio Service (EGPRS) multi-slot
operation and EDGE linear modulation.
3G:
This Load Insensitive Power Amplifier (LIPA^®) helps support WCDMA, High-Speed Downlink
Packet Access (HSDPA), and High-Speed Uplink Packet Access (HSUPA) modulation at a high
antenna Voltage Standing-Wave Ratio (VSWR). This functionality covers multiple bands for
3GPP including bands I, II, III, IV, V and VIII.
RF input (differential 100 Ω) and output ports (50 Ω) are internally matched to reduce the
number of required external components. Extremely low leakage current maximizes handset
standby time.
The InGaP HBT die, the silicon die, and passive components are mounted on a multi-layer
laminate substrate. The assembly is encapsulated with plastic over-mold.
The device is mounted in a 30-pad, 6 mm x 8 mm x 1.1 mm Multi Chip Module (MCM),
Surface-Mounted Technology (SMT) package, which allows for a highly manufacturable low-
cost solution. A block diagram of the SKY77432 is shown in Figure 1.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
201485A • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • February 8, 2011
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