Typical operating characteristics (continued) – Rainbow Electronics MAX8805Z User Manual
Page 8
MAX8805Y/MAX8805Z
600mA PWM Step-Down Converters in
2mm x 2mm WLP for WCDMA PA Power
8
_______________________________________________________________________________________
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.)
10
μs/div
PA STEP-DOWN CONVERTER OUTPUT
VOLTAGE TRANSIENT RESPONSE
V
REFIN
V
PA
500mV/div
500mV/div
500mA/div
MAX8805Y/Z toc26
I
LX
0.5V
1V
0.5V
20
μs/div
PA STEP-DOWN CONVERTER FORCED
BYPASS-FET TRANSIENT RESPONSE
V
HP
V
PA
2V/div
2V/div
500mA/div
MAX8805Y/Z toc27
I
LX
0.5V
0V
0V
1.2V
1.2V
3.6V
10
μs/div
PA STEP-DOWN CONVERTER LOAD
TRANSIENT RESPONSE (MAX8805Y)
I
PA
I
LX
500mA/div
500mA/div
100mV/div
MAX8805Y/Z toc25
V
PA
AC-COUPLED
0mA
500mA
0mA
10
μs/div
PA STEP-DOWN CONVERTER LOAD
TRANSIENT RESPONSE (MAX8805Z)
I
PA
I
LX
500mA/div
500mA/div
100mV/div
MAX8805Y/Z toc24
V
PA
AC-COUPLED
0mA
500mA
0mA
10
μs/div
PA STEP-DOWN CONVERTER LINE
TRANSIENT RESPONSE (MAX8805Z)
V
IN1
V
PA
AC-COUPLED
50mV/div
500mV/div
200mA/div
MAX8805Y/Z toc22
I
LX
4.0V
3.5V
4.0V
10
μs/div
PA STEP-DOWN CONVERTER LINE
TRANSIENT RESPONSE (MAX8805Y)
V
IN1
V
PA
AC-COUPLED
50mV/div
500mV/div
200mA/div
MAX8805Y/Z toc23
I
LX
4.0V
3.5V
4.0V