MMM6035 Datasheet, PDF (14/22 Pages) Freescale Semiconductor, Inc – Quad-Band GSM/GPRS PA Module with Integrated Power Control

Design Information
Table 12. Power Up/Down Sequences (continued)
SEQ
5
6
Remove RF drive
Remove VBAT
DESCRIPTION
7 Design Information
7.1 Power Control
Open loop power control of the power amplifier is enabled when TX_EN is set high. The PA drain voltage
will then be proportional to the VRAMP input voltage over the range 200 mV to 2.2 V of VRAMP as
shown in Figure 4.
VBAT
VD_OUT
Vslope
Vsat
0
Voffset
Vctrl
Vramp
Figure 4. VD_OUT vs. VRAMP Characteristics
MMM6035 Advance Information, Rev. 2.4
14
Freescale Semiconductor