FAN5902 Fairchild Semiconductor, FAN5902 Datasheet - Page 5

• Manufacturer Part Number: FAN5902
• Description: The FAN5902 is a high-efficiency, low-noise, synchronous, step-down DC-to-DC converter designed for powering the radio frequency power amplifiers (RFPA) in 3G mobile handsets and other mobile applications
• Manufacturer: Fairchild Semiconductor

© 2009 Fairchild Semiconductor Corporation
FAN5902 • Rev. 1.0.2.short
Typical Performance Characteristics
Typical performance at 25°C.
Figure 5. Comparison of RF PA Current Consumption
Figure 7. Rise Times for 300mV, 500mV, and 2V ΔV
500
250
0
0
with and without FAN5902
I
BAT
C
OUT
without FAN5902
= 2.2µF (V
P
OUT
I
BAT
15
[dBm]
IN
with FAN5902
=3.7V)
30
OUT
5
Figure 8. Rise Times for 300mV, 500mV, and 2V
Figure 6. Comparison of RFPA Power Added
30
15
0
Efficiency with and without FAN5902
0
ΔV
PAE with FAN5902
OUT
C
OUT
P
= 2.2µF (V
OUT
15
[dBm]
PAE without FAN5902
IN
=3.7V)
www.fairchildsemi.com
30