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PBL 403 10

March 2001

3.5 V GSM 900 MHz Power Amplifier

PBL 403 10

Description.

The PBL 40310 is a highly integrated single-ended silicon MMIC power amplifier

intended for use in GSM terminals. It delivers 35 dBm at 900 MHz with 55 % power added

efficiency into a 50

Ω unbalanced load using a single 3.5 V supply.

The circuit has an analog ramp signal to control output power level and a logical on/

off signal for power down mode. It can be used in dual-band amplifiers using the band

select logical signal. It can be operated up to 50 % duty cycle with minimum performance

degradation. The circuit is housed in a specially designed QSOP16 (150 mil body)

package and the implementation requires only few external components.

25 GHz f

with additional features for improved wireless performance has been used. On-chip

capacitors and inductors are used for the integrated internal matching network. Special

front-side metallized substrate contacts provide excellent ground paths from active

devices to the highly doped semiconductor substrate and package ground.

Key features.

•

2.7 to 5.0 V single supply operation

•

35 dBm output power at 3.5 V

•

55 % Power Added Efficiency

•

Input matched to 50

Ω

•

Complete on chip input and

interstage matching

•

Analog power control

•

Less than 10

µA current

consumption in power down mode

•

Proven RF Silicon Technology

Reliability

•

Minimum number of external

components for low overall solution

cost

Figure 1. Block diagram.

Advance information

Figure 2. Package outlook.

RFin

Power

Control

RFout

BIAS

TX - ON

PBL

40310