Typical operating characteristics (continued) – Rainbow Electronics MAX8805Z User Manual
Page 7
400ns/div
PA STEP-DOWN CONVERTER LIGHT-LOAD
SWITCHING WAVEFORMS (MAX8805Z)
V
PA
AC-COUPLED
I
LX
200mA/div
20mV/div
2V/div
MAX8805Y/Z toc16
V
LX
V
PA
= 1.2V, I
PA
= 50mA
400ns/div
PA STEP-DOWN CONVERTER LIGHT-LOAD
SWITCHING WAVEFORMS (MAX8805Y)
V
PA
AC-COUPLED
I
LX
200mA/div
20mV/div
2V/div
MAX8805Y/Z toc17
V
LX
V
PA
= 1.2V, I
PA
= 50mA
400ns/div
PA STEP-DOWN HEAVY-LOAD
SWITCHING WAVEFORMS (MAX8805Z)
V
PA
AC-COUPLED
I
LX
500mA/div
20mV/div
2V/div
MAX8805Y/Z toc18
V
LX
V
PA
= 1.2V, I
PA
= 500mA
MAX8805Y/MAX8805Z
600mA PWM Step-Down Converters in
2mm x 2mm WLP for WCDMA PA Power
_______________________________________________________________________________________
7
400ns/div
PA STEP-DOWN HEAVY-LOAD
SWITCHING WAVEFORMS (MAX8805Y)
V
PA
AC-COUPLED
I
LX
500mA/div
20mV/div
2V/div
MAX8805Y/Z toc19
V
LX
V
PA
= 1.2V, I
PA
= 500mA
20
μs/div
PA STEP-DOWN SOFT-START
WAVEFORMS (MAX8805Z)
V
PA_EN
V
PA
1V/div
2V/div
500mA/div
MAX8805Y/Z toc20
I
LX
20
μs/div
PA STEP-DOWN SOFT-START
WAVEFORMS (MAX8805Y)
V
PA_EN
V
PA
1V/div
2V/div
200mA/div
MAX8805Y/Z toc21
I
LX
Typical Operating Characteristics (continued)
(V
IN1A
= V
IN1B
= V
IN2
= 3.6V, V
PA
= 1.2V, V
LDO1
= 2.85V, V
LDO2
= 2.85V, R
PA
= 7.5
Ω, circuit of Figure 5, T
A
= +25°C, unless other-
wise noted.)
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7