MAX8805YEWEEE+T datasheet(6/21 Pages) MAXIM

Part #	MAX8805YEWEEE+T

Description	600mA PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power

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Manufacturer	MAXIM [Maxim Integrated Products]

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600mA PWM Step-Down Converters in

2mm x 2mm WLP for WCDMA PA Power

6

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Typical Operating Characteristics (continued)

(VIN1A = VIN1B = VIN2 = 3.6V, VPA = 1.2V, VLDO1 = 2.85V, VLDO2 = 2.85V, RPA = 7.5

Ω, circuit of Figure 5, TA = +25°C, unless other-

wise noted.)

50

60

80

70

90

100

0

200

100

300

500

400

600

PA STEP-DOWN CONVERTER EFFICIENCY

vs. LOAD CURRENT (MAX8805Z)

LOAD CURRENT (mA)

VIN1 = 4.2V

VIN1 = 3.6V

VIN1 = 3.2V

VPA = 0.6V

50

60

80

70

90

100

0

200

100

300

500

400

600

PA STEP-DOWN CONVERTER EFFICIENCY

vs. LOAD CURRENT (MAX8805Y)

LOAD CURRENT (mA)

VIN1 = 4.2V

VIN1 = 3.6V

VIN1 = 3.2V

VPA = 0.6V

1.25

1.20

1.15

1.10

1.05

0

300

100

200

400

500

600

PA STEP-DOWN CONVERTER OUTPUT

VOLTAGE vs. LOAD CURRENT

LOAD CURRENT (mA)

MAX8805Y

MAX8805Z

0.5

1.5

1.0

2.5

2.0

3.5

3.0

4.0

00.8

0.4

1.2

1.6

2.0

PA STEP-DOWN CONVERTER OUTPUT

VOLTAGE vs. REFIN VOLTAGE

REFIN VOLTAGE (V)

-100

-60

-80

0

-20

-40

20

40

80

60

100

0.4

0.6 0.7

0.5

0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5

REFIN vs. REFIN TO OUT GAIN (MAX8805Z)

REFIN VOLTAGE (V)

VIN1 = 3.2V, NO LOAD

VIN1 = 4.2V, NO LOAD

-50

-30

-10

10

30

50

0.4

0.6 0.7

0.5

0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5

REFIN vs. REFIN TO OUT GAIN (MAX8805Y)

REFIN VOLTAGE (V)

VIN1 = 3.2V, NO LOAD

VIN1 = 4.2V, NO LOAD

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MAX8805YEWEEE+T Datasheet(PDF) 6 Page - Maxim Integrated Products

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