MAX688 datasheet(5/12 Pages) MAXIM

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High-Accuracy, Low-Dropout

Linear Regulators

_______________________________________________________________________________________

0.0500

0.1000

0.1500

0.2000

0.2500

0.3000

-55

-25

100

125

SHUTDOWN SUPPLY CURRENT

vs. TEMPERATURE

TEMPERATURE (°C)

3.280

3.285

3.290

3.295

3.300

3.305

3.310

3.315

OUTPUT VOLTAGE

vs. TEMPERATURE

TEMPERATURE (°C)

-55

-25

100

125

ILOAD = 70mA

C1 = 2.2

µF

C2 = 20

µF

C3 = 10nF

LINE-TRANSIENT RESPONSE

VOUT

3.3V

1mV/div

VIN

3.6V

VIN

3.4V

2ms/div

ILOAD = 200mA

C1 = 2.2

µF

C2 = 20

µF

C3 = 10nF

LINE-TRANSIENT RESPONSE

VOUT

3.3V

1mV/div

VIN

3.6V

VIN

3.4V

2ms/div

VIN = 3.4V

LOAD-TRANSIENT RESPONSE

VOUT

3.3V

10mV/div

500mA

0mA

100

µs/div

ILOAD

200mA/div

VIN = 3.5V

LOAD-TRANSIENT RESPONSE

VOUT

3.3V

10mV/div

500mA

0mA

100

µs/div

ILOAD

200mA/div

____________________________Typical Operating Characteristics (continued)

(Circuits of Figures 1 and 2, VIN = 5V, Q1 = FZT749, TA = +25°C, unless otherwise noted.)

ILOAD = 500mA

C1 = 2.2

µF

C2 = 68

µF

C3 = 10nF

MAX687/MAX688

POWER-UP AND EXIT FROM SHUTDOWN

VIN

5V/div

VOUT

1V/div

SHDN

5V/div

1ms/div

100

10k

100k

MAX687/MAX688

RIPPLE REJECTION vs. FREQUENCY

FREQUENCY (Hz)

C2 = 20

µF

VIN = 4.3V Min

ILOAD = 20mA

VIN = 3.6V Min

ILOAD = 200mA

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