ISL91110 datasheet(6/12 Pages) INTERSIL

Part #	ISL91110

Description	High Efficiency Buck-Boost Regulator with 4.5A Switches

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Manufacturer	INTERSIL [Intersil Corporation]

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ISL91110

6

FN8434.4

February 5, 2016

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Typical Performance Curves Unless otherwise noted, operating conditions are: T

A = +25°C, VIN = EN = 3.6V, L = 1µH,

C1 = 2x10µF, C2 = 2x22µF, VOUT = 3.3V, IOUT = 0A to 3A

FIGURE 4. EFFICIENCY vs INPUT VOLTAGE

FIGURE 5. OUTPUT VOLTAGE vs LOAD CURRENT

FIGURE 6. QUIESCENT CURRENT vs INPUT VOLTAGE (VOUT = 3.3V,

MODE = HIGH)

FIGURE 7. SWITCHING FREQUENCY vs INPUT VOLTAGE

FIGURE 8. STEADY-STATE OPERATION IN PFM (VIN = 4V,

VOUT =3.3V, NO LOAD)

FIGURE 9. STEADY-STATE OPERATION IN PWM (VIN = 3.3V,

VOUT =3.3V, NO LOAD)

80

82

84

86

88

90

92

94

96

98

100

2

345

VIN (V)

LOAD = 10mA

LOAD = 1000mA

LOAD = 500mA

LOAD = 100mA

3.26

3.27

3.28

3.29

3.30

3.31

3.32

1

10

100

1000

LOAD CURRENT (mA)

VIN = 3.0V

VIN = 3.6V

VIN = 2.5V

VIN = 4.0V

VIN = 4.5V

TA = -40°C

TA = +25°C

TA = +85°C

0

10

20

30

40

50

60

70

80

1.5

2.5

3.5

4.5

5.5

VIN (V)

2.25

2.30

2.35

2.40

2.45

2.50

2.55

1.5

2.5

3.5

4.5

5.5

VIN (V)

LX1 (2V/DIV)

LX2 (2V/DIV)

VOUT (AC, 50mV/DIV)

IL (500mA/DIV)

400ns/DIV

LX1 (2V/DIV)

LX2 (2V/DIV)

VOUT (AC, 10mV/DIV)

IL (200mA/DIV)

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