Boost Regulator with Integrated Charge Pumps,

Switch Control, and High-Current Op Amp

8

_______________________________________________________________________________________

IN SUPPLY QUIESCENT CURRENT

vs. IN SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

4.5

3.0

3.5

4.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

0

2.5

5.0

200mA LOAD

NO SWITCHING

MAX17075 toc09

POWER-UP SEQUENCE OF

ALL SUPPLY OUTPUTS

4ms/div

REF : 1V/div

AVDD : 10V/div

VCOM : 5V/div

SRC : 20V/div

GOFF : 5V/div

GON : 20V/div

DEL : 2V/div

0V

0V

0V

0V

0V

0V

AVDD

VCOM

SRC

REF

DEL

GOFF

GON

POSITIVE CHARGE-PUMP REGULATOR

LINE REGULATION

SUPPLY VOLTAGE (V)

15

16

17

12

13

14

-0.25

-0.20

-0.15

-0.10

-0.05

0

0.05

-0.30

11

18

POSITIVE CHARGE-PUMP REGULATOR

LOAD REGULATION

LOAD CURRENT (mA)

40

50

70

60

10

20

30

-1.6

-1.2

-0.8

-0.4

0

0.4

-2.0

080

VSRC

GON

MAX17075 toc12

POSITIVE CHARGE-PUMP REGULATOR

LOAD-TRANSIENT RESPONSE (10mA TO 100mA)

4

µs/div

0V

0A

GON

(AC-COUPLED)

200mV/div

LOAD CURRENT

50mA/div

NEGATIVE CHARGE-PUMP REGULATOR

LINE REGULATION

SUPPLY VOLTAGE (V)

14.5

11.5 12.5 13.5

0

0.2

-0.2

10.5

17.5

15.5 16.5

NEGATIVE CHARGE-PUMP REGULATOR

LOAD REGULATION

LOAD CURRENT (mA)

60

20

40

0

0.2

-0.2

0

120

80

100

NEGATIVE CHARGE-PUMP REGULATOR

LOAD-TRANSIENT RESPONSE (10mA TO 100mA)

MAX17075 toc15

4

µs/div

0V

GOFF

(AC-COUPLED)

100mV/div

LOAD CURRENT

50mA/div

0A

Typical Operating Characteristics (continued)