MAX8805Y MAXIM [Maxim Integrated Products], MAX8805Y Datasheet - Page 8

• Manufacturer Part Number: MAX8805Y
• Description: 600mA PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power
• Manufacturer: MAXIM [Maxim Integrated Products]

600mA PWM Step-Down Converters in
2mm x 2mm WLP for WCDMA PA Power
(V
wise noted.)
8
IN1A
_______________________________________________________________________________________
= V
IN1B
AC-COUPLED
AC-COUPLED
= V
V
REFIN
V
V
V
IN2
V
I
I
I
PA
LX
IN1
I
PA
LX
PA
PA
LX
= 3.6V, V
PA STEP-DOWN CONVERTER OUTPUT
0mA
4.0V
TRANSIENT RESPONSE (MAX8805Z)
0.5V
TRANSIENT RESPONSE (MAX8805Z)
PA STEP-DOWN CONVERTER LOAD
PA STEP-DOWN CONVERTER LINE
VOLTAGE TRANSIENT RESPONSE
PA
500mA
= 1.2V, V
1V
3.5V
10μs/div
10μs/div
10μs/div
LDO1
MAX8805Y/Z toc26
0.5V
MAX8805Y/Z toc24
MAX8805Y/Z toc22
Typical Operating Characteristics (continued)
= 2.85V, V
0mA
4.0V
500mV/div
500mA/div
500mV/div
500mA/div
100mV/div
500mA/div
500mV/div
50mV/div
200mA/div
LDO2
= 2.85V, R
AC-COUPLED
AC-COUPLED
PA
V
V
V
V
V
IN1
I
I
I
I
HP
PA
PA
PA
PA
LX
LX
LX
= 7.5Ω, circuit of Figure 5, T
1.2V
PA STEP-DOWN CONVERTER FORCED
0V
4.0V
BYPASS-FET TRANSIENT RESPONSE
TRANSIENT RESPONSE (MAX8805Y)
TRANSIENT RESPONSE (MAX8805Y)
0mA
PA STEP-DOWN CONVERTER LOAD
PA STEP-DOWN CONVERTER LINE
0.5V
500mA
3.5V
3.6V
10μs/div
10μs/div
20μs/div
MAX8805Y/Z toc27
MAX8805Y/Z toc23
MAX8805Y/Z toc25
0mA
0V
A
1.2V
4.0V
= +25°C, unless other-
500mV/div
200mA/div
500mA/div
100mV/div
2V/div
500mA/div
50mV/div
500mA/div
2V/div