REG710

SBAS221E − DECEMBER 2001 − REVISED SEPTEMBER 2003

www.ti.com

9

APPLICATION CIRCUITS

2.2

µF

C

IN

V

IN

2.2

µF

2.2

µF

C

OUT

+

−

0.22

µF

C

P1

REG710−3.3

REG710−3

REG71050

REG710−5

3.3V

3.0V

5.0V

EN

GND

V

IN

V

OUT

0.22

µF

C

P2

EN

GND

V

IN

V

OUT

1.8V

Figure 5. REG710 Circuit for Step-Up Operation from 1.8V to 5.0V with 10mA Output Current

0.22

µF

C

P1

REG710−3.3

0.22

µF

C

P2

REG710−3.3

4.7

µF

C

IN

V

OUT

V

IN

V

IN

V

OUT

GND

V

IN

V

OUT

GND

4.7

µF

C

OUT

+

−

Figure 6. REG710 Circuit for Doubling the Output

Current

C

IN

2.2

µF

C

PUMP

0.22

µF

3.3V to

4.2V

C

OUT

2.2

µF

R

LED

GND

Enable

REG71050

REG710−5

LED

LED

RR

Figure 7. REG710 Circuit for Driving LEDs