MAX8581 datasheet(4/9 Pages) MAXIM

Part #	MAX8581

Description	2.5MHz/1.5MHz Step-Down Converters with 60m ohm Bypass in TDFN for CDMA PA Power

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Manufacturer	MAXIM [Maxim Integrated Products]

Direct Link	https://www.maximintegrated.com/en.html

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4 / 9 page

2.5MHz/1.5MHz Step-Down Converters

with 60m

Ω Bypass in TDFN for CDMA PA Power

4

_______________________________________________________________________________________

Typical Operating Characteristics

(VIN = 3.6V, VOUT = 1.2V, MAX8582 EV Kit, TA = +25°C, unless otherwise noted.)

BYPASS MODE DROPOUT VOLTAGE

vs. LOAD CURRENT

LOAD CURRENT (A)

0.8

0.6

0.2

0.4

0.01

0.02

0.03

0.04

0.06

0.05

0.07

0.08

0

1.0

VOUT = 3.2V

VOUT = 3.6V

EFFICIENCY vs. OUTPUT VOLTAGE

OUTPUT VOLTAGE (V)

2.8

2.4

2.0

1.2

1.6

65

70

75

80

90

85

95

100

60

0.8

3.2

RLOAD = 7.5

Ω

EFFICIENCY

vs. LOAD CURRENT (VOUT = 1.8V)

LOAD CURRENT (mA)

100

20

10

30

40

50

60

80

70

90

100

0

10

1000

EFFICIENCY

vs. LOAD CURRENT (VOUT = 1.2V)

LOAD CURRENT (mA)

100

20

10

30

40

50

60

80

70

90

100

0

10

1000

EFFICIENCY

vs. LOAD CURRENT (VOUT = 0.6V)

LOAD CURRENT (mA)

100

20

10

30

40

50

60

80

70

90

0

10

1000

NO-LOAD SUPPLY CURRENT

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

4.0

4.5

5.0

2

1

3

4

5

6

8

7

9

0

2.5

3.0

3.5

5.5

OUTPUT VOLTAGE vs. LOAD CURRENT

LOAD CURRENT (mA)

300

400

500

1.160

1.170

1.180

1.190

1.200

1.210

1.150

0

100

200

600

OUTPUT VOLTAGE vs. REFIN VOLTAGE

REFIN VOLTAGE (V)

1.2

0.9

1.5

1.8

0.5

1.5

1.0

2.0

3.0

2.5

4.0

3.5

4.5

0

0.3

0.6

2.1

VIN = 4.2V

VIN = 3.6V

VIN = 3.0V

RLOAD = 7.5

Ω

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