MAX1706EEE datasheet(6/20 Pages) MAXIM

Part #	MAX1706EEE

Description	1- to 3-Cell, High-Current, Low-Noise, Step-Up DC-DC Converters with Linear Regulator

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Manufacturer	MAXIM [Maxim Integrated Products]

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1- to 3-Cell, High-Current, Low-Noise,

Step-Up DC-DC Converters with Linear Regulator

6

_______________________________________________________________________________________

__________________________________________Typical Operating Characteristics

(Circuit of Figure 2, TA = +25°C, unless otherwise noted.)

100

0

0.1

10

100

1

1000

MAX1705

EFFICIENCY vs. OUTPUT CURRENT

(VOUT = 5V)

20

OUTPUT CURRENT (mA)

40

60

80

90

10

30

50

70

L = 10

µH

VOUT = 5V

A: VIN = 0.9V

C: VIN = 2.4V

E: VIN = 3.6V

1: PFM MODE

2: PWM MODE

A.1

A.2

C.1

C.2

B.2

B.1

100

0

0.1

10

100

1

1000

MAX1705

EFFICIENCY vs. OUTPUT CURRENT

(VOUT = 3.3V)

20

OUTPUT CURRENT (mA)

40

60

80

90

10

30

50

70

L = 10

µH

VOUT = 3.3V

A: VIN = 0.9V

B: VIN = 2.7V

1: PFM MODE

2: PWM MODE

B.1

B.2

A.1

A.2

0

MAX1705

MAXIMUM OUTPUT CURRENT

vs. INPUT VOLTAGE

200

100

300

INPUT VOLTAGE (V)

3.5

700

600

900

800

400

500

1.0

2.5

4.5

1000

2.0

3.0

0.5

4.0

1.5

L = 10

µH

PWM MODE

PFM MODE

VOUT = 3.3V

VOUT = 5V

100

0

0.1

10

100

1

1000

MAX1706

EFFICIENCY vs. OUTPUT CURRENT

(VOUT = 3.3V)

20

OUTPUT CURRENT (mA)

40

60

80

90

10

30

50

70

B.2

A.2

A.1

B.1

L = 22

µH

VOUT = 3.3V

A: VIN = 0.9V

B: VIN = 2.7V

1: PFM MODE

2: PWM MODE

0.5

0.01

MAX1705

START-UP INPUT VOLTAGE

vs. OUTPUT CURRENT

0.9

0.7

1.1

OUTPUT CURRENT (mA)

100

1.7

1.5

2.1

1.9

1.3

0.1

10

1000

2.3

1

NO-LOAD START-UP:

1.0V AT -40°C

0.79 AT +25°C

0.64V AT +85°C

CONSTANT-CURRENT LOAD

VOUT = 3.3V

L = 10

µH

D1 = MBR0520L

TA = -40°C

TA = +25°C

TA = +85°C

100

0

0.1

10

100

1

1000

MAX1706

EFFICIENCY vs. OUTPUT CURRENT

(VOUT = 5V)

20

OUTPUT CURRENT (mA)

40

60

80

90

10

30

50

70

A.1

A.2

C.2

B.2

C.1

B.1

L = 22

µH

VOUT = 5V

A: VIN = 0.9V

B: VIN = 2.4V

C: VIN = 3.6V

1: PFM MODE

2: PWM MODE

0

MAX1706

MAXIMUM OUTPUT CURRENT

vs. INPUT VOLTAGE

200

100

300

INPUT VOLTAGE (V)

3.5

700

600

400

500

1.0

3

4.5

2.0

0.5

2.5

4

1.5

PWM MODE

L = 22

µH

PFM MODE

VOUT = 5V

VOUT = 3.3V

0

NO-LOAD SUPPLY CURRENT

vs. INPUT VOLTAGE

2

1

3

INPUT VOLTAGE (V)

4.0

7

6

10

9

8

4

5

1.0

3.0

5.0

12

11

2.0

3.5

0.5

2.5

4.5

1.5

PFM MODE

PWM MODE

VOUT = 3.3V

L = 10

µH

0

LINEAR-REGULATOR DROPOUT

VOLTAGE vs. LOAD CURRENT

20

40

LOAD CURRENT (mA)

160

120

100

60

80

40

120

200

140

80

VLDO = 3.3V

VLDO = 2.5V

VLDO = 5V

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