RMPA2265 Fairchild Semiconductor, RMPA2265 Datasheet - Page 5

• Manufacturer Part Number: RMPA2265
• Description: IC MOD RF POWER AMP 8PIN 3X3LCC
• Manufacturer: Fairchild Semiconductor

Specifications of RMPA2265

• Current - Supply: 45mA
• Frequency: 1.92GHz ~ 1.98GHz
• Gain: 28dB
• Noise Figure: 4dB
• Package / Case: 8-LCC
• Rf Type: W-CDMA
• Voltage - Supply: 3V ~ 4.2V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• P1db: -
• Test Frequency: -
• Other names: RMPA2265TR

RMPA2265 Rev. I
Performance Data: 1850 to 1910 MHz
Efficiency Improvement Applications
In addition to high-power/low-power bias modes, the efficiency
of the PA module can be significantly increased at backed-off RF
power levels by dynamically varying the supply voltage (Vcc)
applied to the amplifier. Since mobile handsets and power
amplifiers frequently operate at 10–20 dB back-off, or more, from
maximum rated linear power, battery life is highly dependent on
the DC power consumed at antenna power levels in the range of
0 to +16dBm. The reduced demand on transmitted RF power
allows the PA supply voltage to be reduced for improved
efficiency, while still meeting linearity requirements for WCDMA
modulation with excellent margin. High-efficiency DC-DC
converters are now available to implement switched-voltage
operation.
DC Turn On Sequence:
1. Vcc1 = Vcc2 = 3.4V (typical)
2. Vref = 2.85V (typical)
3. High-Power: Vmode = 0V (Pout > 16dBm)
Low-Power: Vmode = 2.0V (Pout < 16dBm)
33.0
32.0
31.0
30.0
29.0
28.0
27.0
26.0
25.0
24.0
23.0
-30.0
-32.0
-34.0
-36.0
-38.0
-40.0
-42.0
-44.0
-46.0
-48.0
-50.0
1850
RMPA2265 3x3 WCDMA PA at US-PCS Freq
RMPA2265 3x3 WCDMA PA at US-PCS Freq
1850
Vcc=3.4V, Vref=2.85V, Vmode=0V, Pout=27.5dBm
Vcc=3.4V, Vref=2.85V, Vmode=0V, Pout=27.5dBm
Frequency (MHz)
Frequency (MHz)
1880
1880
1910
1910
5
With the PA module in low-power mode (Vmode = 2.0V) at
+16dBm output power and supply voltages reduced from 3.4V
nominal down to 1.2V, power-added efficiency is more than
doubled from 9 percent to 25 percent (Vcc = 1.2V) while
maintaining a typical ACLR1 of -40dBc and ACLR2 of less than
-54 dBc. Operation at even lower levels of Vcc supply voltage
are possible with a further restriction on the maximum RF output
power.
45.0
44.0
43.0
42.0
41.0
40.0
39.0
38.0
37.0
36.0
35.0
-45.0
-47.0
-49.0
-51.0
-53.0
-55.0
-57.0
-59.0
-61.0
-63.0
-65.0
1850
RMPA2265 3x3 WCDMA PA at US-PCS Freq
1850
RMPA2265 3x3 WCDMA PA at US-PCS Freq
Vcc=3.4V, Vref=2.85V, Vmode=0V, Pout=27.5dBm
Vcc=3.4V, Vref=2.85V, Vmode=0V, Pout=27.5dBm
Frequency (MHz)
Frequency (MHz)
1880
1880
1910
1910
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