Rainbow-electronics MAX8805Z Manual de usuario descargar pdf (Pagina 9)

MAX8805Y/MAX8805Z

600mA PWM Step-Down Converters in

2mm x 2mm WLP for WCDMA PA Power

_______________________________________________________________________________________

10μs/div

PA STEP-DOWN CONVERTER AUTOMATIC

BYPASS-FET TRANSIENT RESPONSE

REFIN

2V/div

1V/div

500mA/div

MAX8805Y/Z toc28

1.8V

0.6V

1.2V

3.6V

200μs/div

PA STEP-DOWN CONVERTER AUTOMATIC

BYPASS-FET TRANSIENT RESPONSE

REFIN

1V/div

500mA/div

MAX8805Y/Z toc29

REFIN

IS A 0.4V TO

2V SINUSOIDAL

SIGNAL

3.6V

10μs/div

PA STEP-DOWN CONVERTER

SHUTDOWN RESPONSE (MAX8805Y)

PA_EN

1V/div

2V/div

100mA/div

MAX8805Y/Z toc30

1.2V

10μs/div

PA STEP-DOWN CONVERTER

SHUTDOWN RESPONSE (MAX8805Z)

PA_EN

2V/div

100mA/div

MAX8805Y/Z toc31

1.2V

100

150

200

LDO1, LDO2 SUPPLY CURRENT

vs. SUPPLY VOLTAGE

MAX8805Y/Z toc32

SUPPLY VOLTAGE (V)

NO-LOAD SUPPLY CURRENT (μA)

2.0 3.5 4.02.5 3.0 4.5 5.0 5.5

120

150

LDO1, LDO2 DROPOUT VOLTAGE

vs. LOAD CURRENT

MAX8805Y/Z toc33

LOAD CURRENT (mA)

LDO1, LDO2 DROPOUT VOLTAGE (mV)

0 10050 150 200

Typical Operating Characteristics (continued)

IN1A

= V

IN1B

= V

IN2

= 3.6V, V

= 1.2V, V

LDO1

= 2.85V, V

LDO2

= 2.85V, R

= 7.5Ω, circuit of Figure 5, T

= +25°C, unless other-

wise noted.)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 20 21

MAX8805Y/MAX8805Z 1

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Rainbow-electronics MAX8805Z Manual de usuario Pagina 9

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