Dc Distribution And Regulation Part; Transceiver Pin Description - Pantech G800 Service Manual

G800 Service Manual
Fig.4-2. Top view of RF Transceiver PCB Layout

4.2.1 DC Distribution and Regulation Part

The battery voltage, in return, is applied to the logic part and RF part via LDO(Low Drop-Out) regulator. As
several LDO regulators are used, power can be supplied for each necessary part efficiently. Audio/Logic parts
use +2.8V. Si4205 RF Transceiver (U710) and RF3133 Power Amplifier (U701) also use +2.8V DC voltage.
4.2.2 Transciever pin description
PANTECH
Fig.4-3. Top View of Si4205-BM
- 15 -
R&D CONFIDENTIAL