MAX8969EWL37 datasheet(5/15 Pages) MAXIM

Part #	MAX8969EWL37

Description	Step-Up Converter for Handheld Applications

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Manufacturer	MAXIM [Maxim Integrated Products]

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5

Maxim Integrated

Step-Up Converter

for Handheld Applications

MAX8969

Typical Operating Characteristics

(VIN = 3.6V, COUT = 22µF, X5R, 6.3V local and 10µF, X5R, 6.3V, 1µH inductor, circuit of Figure 1, TA = +25NC, unless otherwise noted.)

LOAD CURRENT (mA)

100

10

1

1000

EFFICIENCY vs. OUTPUT CURRENT

(VOUT = 5V)

65

70

75

80

85

90

95

100

VIN = 4.3V

VIN = 3.6V

L = TOKO DFE252012 1µH

VIN = 2.5V

VIN = 3.1V

60

MAXIMUM OUTPUT CURRENT

vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

5.0

4.5

4.0

3.5

3.0

1000

1500

2000

2500

3000

500

2.5

5.5

VOUT, 3.7V ≥ 3.35V

VOUT, 5V ≥ 4.5V

EFFICIENCY vs. OUTPUT CURRENT

(VOUT = 3.7V)

LOAD CURRENT (mA)

100

10

82

84

86

88

90

92

94

96

98

100

80

1

1000

VIN = 2.5V

VIN = 3.1V

L = TOKO DFE252012 1µH

OUTPUT VOLTAGE (VOUT = 5V)

vs. OUTPUT CURRENT

OUTPUT CURRENT (mA)

800

600

400

200

4.60

4.65

4.70

4.75

4.80

4.85

4.90

4.95

5.00

5.05

4.55

0

1000

VIN = 2.5V

VIN = 3.2V

VIN = 3.6V VIN = 4.3V

NO-LOAD SUPPLY CURRENT

vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

5.0

4.5

3.0

3.5

4.0

VOUT = 3.7V

VOUT = 5V

10

20

30

40

50

60

70

80

0

2.5

5.5

OUTPUT CURRENT (mA)

800

600

400

200

3.4

3.6

3.8

4.0

4.2

4.4

3.2

0

1000

OUTPUT VOLTAGE (VOUT = 3.7V)

vs. OUTPUT CURRENT

VIN = 3.2V

VIN = 4.3V

VIN = 2.5V

VIN = 3.6V

OUTPUT VOLTAGE (VOUT = 5V)

vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

5.0

4.5

4.0

3.5

3.0

3.5

4.0

4.5

IOUT = 1000mA

IOUT = 10mA IOUT = 100mA I

OUT = 600mA

AUTOMATIC

FREQUENCY

ADJUSTMENT

AUTOMATIC

TRACK MODE

TRANSITION

5.0

5.5

3.0

2.5

5.5

OUTPUT VOLTAGE (VOUT = 3.7V)

vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

4.0

3.5

3.0

3.5

4.0

4.5

5.0

2.5

4.5

IOUT = 600mA

IOUT = 100mA

IOUT = 10mA

IOUT = 1000mA

AUTOMATIC

FREQUENCY

ADJUSTMENT

AUTOMATIC

TRACK MODE

TRANSITION

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