AS1339 dc-dc equivalent, 650ma rf step-down dc-dc.
! ! ! ! ! !
Fixed Switching Frequency: 2MHz PA Step-Down Converter Low Dropout Voltage Low Output-Voltage Ripple Dynamic Output Voltage Control (0.8V to 3.75V) 30µs Sett.
The AS1339 is ideal for WCDMA/NCDMA cellular handsets, Wireless PDAs, and Smartphones.
Figure 1. Typical Operating Circ.
The AS1339 is a high-frequency step-down converter optimized for dynamically powering the power amplifier (PA) in WCDMA or NCDMA handsets. The device uses a 110mΩ typical bypass FET to power the PA directly from the battery during high-power transmis.
Image gallery
TAGS
Download (Size : 3.98MB)