MAX17075(2008) Ver la hoja de datos (PDF) - Maxim Integrated

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MAX17075
(Rev.:2008)

Boost Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op Amp

Maxim Integrated 

Boost Regulator with Integrated Charge Pumps,

Switch Control, and High-Current Op Amp

(TA = +25°C, unless otherwise noted.)

Typical Operating Characteristics

STEP-UP REGULATOR EFFICIENCY

vs. LOAD CURRENT

100

90

VIN = 5V

80

70

60

VIN = 3.3V

50

40

VIN = 2.5V

30

20

10

0

1

10

100

1000

LOAD CURRENT (mA)

STEP-UP REGULATOR OUTPUT VOLTAGE

vs. LOAD CURRENT

0.6

0.4

0.2

0

-0.2

-0.4

-0.6

-0.8

-1.0

0 100 200 300 400 500 600 700 800 900 1000

LOAD CURRENT (mA)

STEP-UP REGULATOR LINE REGULATION

UNDER DIFFERENT LOADS

0.20

0.15

0.10

0.05 NO

LOAD

0

200mA LOAD

-0.05

300mA LOAD

-0.10

100mA LOAD

-0.15

-0.20

2.5 3.0 3.5 4.0 4.5 5.0

INPUT VOLTAGE (V)

STEP-UP REGULATOR SWITCHING

FREQUENCY vs. INPUT VOLTAGE

1.24

150mA LOAD

1.23

1.22

1.21

1.20

1.19

1.18

1.17

1.16

2.5 3.0 3.5 4.0 4.5 5.0

INPUT VOLTAGE (V)

STEP-UP REGULATOR STARTUP

WITH HEAVY LOAD (600mA)

MAX17075 toc05

VIN

5V/div

0V

VAVDD

5V/div

0V

IL

1A/div

0A

LX

10V/div

0V

2ms/div

STEP-UP REGULATOR LOAD-TRANSIENT

RESPONSE (100mA TO 800mA)

MAX17075 toc06

STEP-UP REGULATOR PULSED

LOAD-TRANSIENT RESPONSE (80mA TO 2.08mA)

MAX17075 toc07

VAVDD

0V

(AC-COUPLED)

500mV/div

0V

VAVDD

(AC-COUPLED)

500mV/div

0A

IL

2A/div

IL

2A/div

0A

0A

RCOMP = 82kΩ

CCOMP1 = 220pF

CCOMP2 = 18pF

40μs/div

LOAD CURRENT

500mA/div

0A

RCOMP = 82kΩ

CCOMP1 = 220pF

CCOMP2 = 18pF

10μs/div

LOAD CURRENT

1A/div

_______________________________________________________________________________________ 7

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