RMPA1766 View Datasheet(PDF) - Fairchild Semiconductor
Part Name
Description
Manufacturer
RMPA1766 Datasheet PDF : 7 Pages
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PRELIMINARY
RMPA1766 i-Lo™
WCDMA Band IV Power Amplifier Module
April 2007
tm
Features
■ 40% WCDMA efficiency at +28dBm Pout
■ 20% WCDMA efficiency (58mA total current) at
+16dBm Pout
■ Low quiescent current (Iccq): 25mA in low-power
mode
■ Meets HSDPA performance requirements
■ Single positive-supply operation with low power and
shutdown modes
– 3.4V typical Vcc operation
– Low Vref (2.85V) compatible with advanced handset
chipsets
■ Compact Lead-free compliant LCC package –
(4.0 x 4.0 x 1.0mm nominal)
■ Industry standard pinout
■ Internally matched to 50Ω and DC blocked RF
input/output
General Description
The RMPA1766 Power Amplifier Module (PAM) is
Fairchild’s latest innovation in 50Ω matched, surface
mount modules targeting UMTS/WCDMA/HSDPA
applications. Answering the call for ultra-low DC power
consumption and extended battery life in portable
electronics, the RMPA1766 uses novel proprietary
circuitry to dramatically reduce amplifier current at low to
medium RF output power levels (< +16dBm), where the
handset most often operates. A simple two-state Vmode
control is all that is needed to reduce operating current
by more than 60% at 16dBm output power, and
quiescent current (Iccq) by as much as 70% compared
to traditional power-saving methods. No additional circuitry,
such as DC-to-DC converters, are required to achieve this
remarkable improvement in amplifier efficiency. Further,
the 4 x 4 x 1.0 mm LCC package is pin-compatible and a
drop-in replacement for last generation 4 x 4 mm PAMs
widely used today, minimizing the design time to apply
this performance-enhancing technology. The multi-stage
GaAs Microwave Monolithic Integrated Circuit (MMIC) is
manufactured using Fairchild RF’s InGaP Heterojunction
Bipolar Transistor (HBT) process.
Functional Block Diagram
(Top View)
Vcc1 1
RF IN 2
GND 3
Vmode 4
Vref 5
MMIC
INPUT
MATCH
BIAS/MODE SWITCH
10 Vcc2
OUTPUT
MATCH
9 GND
8 RF OUT
7 GND
6 GND
11 (paddle ground on package bottom)
©2007 Fairchild Semiconductor Corporation
RMPA1766 i-Lo™ Rev. B
www.fairchildsemi.com
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