MAX8795AGCJ(2007) 查看數據表（PDF） - Maxim Integrated

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MAX8795AGCJ
(Rev.:2007)

TFT-LCD DC-DC Converter with Operational Amplifiers

Maxim Integrated 

TFT-LCD DC-DC Converter with

Operational Amplifiers

Typical Operating Characteristics (continued)

(Circuit of Figure 1, VIN = 5V, VMAIN = 14V, VGON = 25V, VGOFF = -10V, TA = +25°C, unless otherwise noted.)

STEP-UP REGULATOR SOFT-START

(HEAVY LOAD)

MAX8795A toc04

A

0V

B

STEP-UP REGULATOR PULSED

LOAD-TRANSIENT RESPONSE

MAX8795A toc05

A

50mA

13.9V

B

TIMER-DELAYED OVERLOAD PROTECTION

MAX8795A toc06

A

0V

B

C

C

0A

0A

0A

0U

10µs/div

40ms/div

A: VIN, 5V/div

B: VMAIN, 5V/div

2ms/div

A: LOAD CURRENT, 1A/div

B: VMAIN, 200mV/div, AC-COUPLED

C: INDUCTOR CURRENT, 1A/div

A: VMAIN, 2V/div

B: INDUCTOR CURRENT, 1A/div

C: INDUCTOR CURRENT, 1A/div

REF VOLTAGE LOAD REGULATION

1.2500

1.2495

1.2490

1.2485

1.2480

1.2475

1.2470

0

10

20

30

40

50

LOAD CURRENT (µA)

GATE-ON REGULATOR LINE REGULATION

0

-0.2

-0.4

-0.6

-0.8

25

IPOS = 20mA

26

27

28

29

30

INPUT VOLTAGE (V)

GATE-ON REGULATOR LOAD REGULATION

-0.1

-0.3

-0.5

0

IBOOST = 200mA

5

10

15

20

LOAD CURRENT (mA)

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