MAX1765EEE datasheet(7/19 Pages) MAXIM

Part #	MAX1765EEE

Description	800mA, Low-Noise, Step-Up DC-DC Converter with 500mA Linear Regulator

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Manufacturer	MAXIM [Maxim Integrated Products]

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7 / 19 page

800mA, Low-Noise, Step-Up DC-DC Converter

with 500mA Linear Regulator

_______________________________________________________________________________________

7

Typical Operating Characteristics

(TA = +25°C, unless otherwise noted.)

0

0.001

1

0.1

0.01

TRACK MODE EFFICIENCY vs. LOAD CURRENT

(VOUTL = +5V)

30

10

70

50

90

40

20

80

60

LOAD CURRENT (A)

VIN = +1.2V

VIN = +3.6V

NORMAL MODE

VIN = +2.4V

VIN = +3.6V

VIN = +2.4V

PWM

MODE

0

0.05

0.10

0.15

0.20

0.25

0.30

0

200

100

300 400 500 600 700 800

LINEAR REGULATOR DROPOUT

VOLTAGE vs. LOAD CURRENT

LOAD CURRENT (mA)

VOUTL = +2.5V

VOUTL = +2.85V

VOUTL = +5V

0

1

1000

100

10

STARTUP INPUT VOLTAGE

vs. OUTPUT CURRENT

2.5

1.0

0.5

2.0

1.5

OUTPUT CURRENT (mA)

TA = +25

°C

TA = -40

°C

TA = +85

°C

0

4

2

10

8

6

16

14

12

18

0

1.0

1.5

0.5

2.0

2.5

3.0

3.5

NO-LOAD SUPPLY CURRENT

vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

FPWM MODE

NORMAL MODE

0.9

0

0.001

1

0.1

0.01

EFFICIENCY vs. LOAD CURRENT

(VOUT = +3.3V)

0.3

0.1

0.7

0.5

1.0

0.4

0.2

0.8

0.6

LOAD CURRENT (A)

VIN = +2.4V

NORMAL

MODE

VIN = +1.2V

VIN = +2.4V

VIN = +1.2V

PWM

MODE

90

0

0.001

1

0.1

0.01

EFFICIENCY vs. LOAD CURRENT

(VOUT = +5V)

30

10

70

50

100

40

20

80

60

LOAD CURRENT (A)

PWM

MODE

VIN = +1.2V

VIN = +2.4V

VIN = +3.6V

VIN = +3.6V NORMAL MODE

VIN = +2.4V

VIN = +1.2V

90

0

0.001

1

0.1

0.01

TRACK MODE EFFICIENCY vs. LOAD CURRENT

(VOUTL = +2.85V)

30

10

70

50

100

40

20

80

60

LOAD CURRENT (A)

NORMAL MODE

VIN = +1.2V

VIN = +2.4V

VIN = +1.2V

VIN = +2.4V

PWM

MODE

0

0.001

1

0.1

0.01

TRACK MODE EFFICIENCY vs. LOAD CURRENT

(VOUTL = +3.3V)

30

10

70

50

90

40

20

80

60

LOAD CURRENT (A)

VIN = +1.2V

VIN = +2.4V

VIN = +3.6V

VIN = +2.4V

NORMAL

MODE

NORMAL MODE/

PWM MODE

PWM

MODE

0

600

400

200

800

1000

1200

0

2.0

1.5

0.5 1.0

2.5 3.0 3.5 4.0 4.5 5.0

MAXIMUM OUTPUT CURRENT

vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

VOUT = +5V, ISET = REF

VOUT = +3.3V, ISET = REF

VOUT = +3.3V, ISET = 0.5 REF

VOUT = +5V, ISET = 0.5 REF

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