MAX8784EVKIT datasheet(7/24 Pages) MAXIM

Part #	MAX8784EVKIT

Description	Step-Up Regulator, Internal Charge Pumps, Switch Control, and Operational Amplifier for TFT LCDs

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Manufacturer	MAXIM [Maxim Integrated Products]

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Step-Up Regulator, Internal Charge Pumps, Switch

Control, and Operational Amplifier for TFT LCDs

_______________________________________________________________________________________

7

STEP-UP REGULATOR EFFICIENCY

vs. LOAD CURRENT

LOAD CURRENT (mA)

600

400

200

79

83

87

91

95

75

0800

fOSC = 1.2MHz

VIN = 5.0V

STEP-UP REGULATOR LOAD REGULATION

LOAD CURRENT (mA)

600

400

200

-0.6

-0.2

0.2

0.6

1.0

-1.0

0

800

VCC QUIESCENT CURRENT

vs. VCC

VCC (V)

5.6

4.8

5.2

4.4

1

2

3

4

5

0

4.0

6.0

SWITCHING

NOT SWITCHING

VCC QUIESCENT CURRENT

vs. TEMPERATURE

TEMPERATURE (

°C)

60

35

10

-15

1

2

3

4

5

0

-40

85

SWITCHING

NOT SWITCHING

STEP-UP REGULATOR SOFT-START

(HEAVY LOAD)

MAX8784 toc05

10ms/div

AVDD

LX: 10V/div

ILOAD: 500mA/div

IL: 20A/div

AVDD: 10V/div

IL

ILOAD

LX

STEP-UP REGULATOR LOAD

TRANSIENT RESPONSE

MAX8784 toc06

20

µs/div

AVDD

ILOAD: 200mA/div

IL: 1A/div

AVDD: 100mV/div

(AC-COUPLED)

IL

ILOAD

STEP-UP REGULATOR PULSED

LOAD TRANSIENT RESPONSE

MAX8784 toc07

10

µs/div

AVDD : 200mV/div

(AC-COUPLED)

IL : 1A/div

IAVDD : 1A/div

IAVDD : 0.3A TO 1.3A,

2

µs PULSE

AVDD

IL

IAVDD

0A

Typical Operating Characteristics

(Circuit of Figure 1, VCC = 5V, AVDD = 14V, VPOUT = 28V, VGOFF = -9V, TA = +25°C, unless otherwise noted.)

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MAX8784EVKIT Datasheet(PDF) 7 Page - Maxim Integrated Products

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