MAX8758ETG+ datasheet(8/20 Pages) MAXIM

Part #	MAX8758ETG+

Description	Step-Up Regulator with Switch Control and Operational Amplifier for TFT LCD

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Manufacturer	MAXIM [Maxim Integrated Products]

Direct Link	https://www.maximintegrated.com/en.html

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Step-Up Regulator with Switch Control and

Operational Amplifier for TFT LCD

8

_______________________________________________________________________________________

Typical Operating Characteristics (continued)

(Circuit of Figure 1, VIN = 3.3V, VMAIN = 8.5V, FREQ = SHDN = IN, TA = +25°C, unless otherwise noted.)

OP-AMP LARGE-SIGNAL STEP RESPONSE

MAX8758 toc17

1

μs/div

VOUTB

2V/div

OP-AMP SMALL-SIGNAL STEP RESPONSE

MAX8758 toc18

200ns/div

VPOSB

100mV/div

AC-COUPLED

VOUTB

200mV/div

AC-COUPLED

HIGH-VOLTAGE SWITCH CONTROL FUNCTION

(MODE 1)

MAX8758 toc19

400

μs/div

VMODE

VCTL

VGON

HIGH-VOLTAGE SWITCH CONTROL FUNCTION

(MODE 2)

MAX8758 toc20

400

μs/div

VMODE

VCTL

VGON

POSITIVE CHARGE-PUMP OUTPUT VOLTAGE

vs. CHARGE-PUMP LOAD CURRENT

CHARGE-PUMP LOAD CURRENT (mA)

15

10

5

21

22

23

24

25

20

020

VIN = 3.3V

fOSC = 1.2MHz

-9

-8

-7

-6

-5

-10

NEGATIVE CHARGE-PUMP OUTPUT VOLTAGE

vs. LOAD CURRENT

CHARGE-PUMP LOAD CURRENT (mA)

15

10

5

020

VIN = 3.3V

fOSC = 1.2MHz

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