Rainbow-electronics MAX8805Z Bedienungsanleitung PDF herunterladen (Seite 3)

MAX8805Y/MAX8805Z

600mA PWM Step-Down Converters in

2mm x 2mm WLP for WCDMA PA Power

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PARAMETER CONDITIONS MIN TYP MAX UNITS

p-channel MOSFET switch, I

= -40mA 0.18 0.6

On-Resistance

n-channel MOSFET rectifier, I

= 40mA 0.15 0.6

= +25°C 0.1 5

LX Leakage Current

IN1A

= V

IN1B

= V

IN2

= 5.5V,

= 0V

= +85°C 1

µA

p-Channel MOSFET Peak

Current Limit

= 0V 0.7 0.9 1.1 A

n-Channel MOSFET Valley

Current Limit

0.5 0.7 0.9 A

Minimum On- and Off-Times 0.1 µs

Power-Up Delay From PA_EN rising to LX rising 150 250 µs

BYPASS

= +25°C 0.060 0.1

On-Resistance

p-channel MOSFET bypass,

OUT

= -90mA

= +85°C 0.1

Bypass Current Limit V

= 0 0.8 1.2 1.8 A

S tep - D ow n C ur r ent Li m i t i n Byp ass V

= 0 0.7 0.9 1.1 A

Total Bypass Current Limit V

= V

= 0 1.5 2.1 2.9 A

= +25°C 0.01 10

Bypass Off-Leakage Current

IN1A

= V

IN1B

= V

IN2

= 5.5V,

PAA

= V

PAB

= 0V

= +85°C 1

µA

LDO1

MAX8805YEWEAA+T 1.746 1.8 1.854

MAX8805YEWEBC+T 2.425 2.5 2.575

MAX8805YEWECC+T 2.619 2.7 2.781

MAX8805YEWEDD+T 2.716 2.8 2.884

MAX8805YEWEEE+T 2.765 2.85 2.936

Output Voltage V

LDO1

IN2

= 5.5V, I

LDO1

= 1mA;

IN2

= 3.4V, I

LDO1

= 100mA

MAX8805YEWEGG+T 2.910 3.0

3.090

Output Current 200 mA

Current Limit V

LDO1

= 0V 250 550 750 mA

Dropout Voltage I

LDO1

= 100mA, T

= +25°C (V

LDO1

≥ 2.5V) 70 200 mV

Line Regulation V

IN2

stepped from 3.5V to 5.5V, I

LDO1

= 100mA 2.4 mV

Load Regulation I

LDO1

stepped from 50µA to 200mA 25 mV

Power-Supply Rejection

ΔV

LDO1

/ ΔV

IN2

10Hz to 10kHz, C

LDO1

= 1µF, I

LDO1

= 30mA 70 dB

Output Noise 100Hz to 100kHz, C

LDO1

= 1µF, I

LDO1

= 30mA 35 µV

RMS

0 < I

LDO1

< 10mA 100 nF

Output Capacitor for Stable

Operation

0 < I

LDO1

< 200mA 1 µF

Shutdown Output Impedance V

EN1

= 0V 1 kΩ

ELECTRICAL CHARACTERISTICS (continued)

IN1A

= V

IN1B

= V

IN2

= V

PA_EN

= V

EN1

= V

EN2

= 3.6V, V

= 0V, V

REFIN

= 0.9V, T

= -40°C to +85°C. Typical values are at T

+25°C, unless otherwise noted.) (Note 1)

1 2 3 4 5 6 7 8 ... 20 21

MAX8805Y/MAX8805Z 1

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