SPX2815AU datasheet(5/10 Pages) SIPEX

Part #	SPX2815AU

Description	1.5A Low Dropout Voltage Regulator Adjustable & Fixed Output, Fast Response

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Manufacturer	SIPEX [Sipex Corporation]

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Date: 5/17/04

SPX2815 1.5A Low Dropout Voltage Regulator

Figure 9. 5V Regulator with Shutdown

SPX2815

V

IN

R

1

R

2

10µF

10µF*

1kΩ,

330Ω

1%

+

4.7µF

C

1

*C

1

improves ripple rejection.

Z

C

should be ~ R1 at ripple frequency

5V

ADJ

IN

OUT

(Note A)

V

OUT

Note A: V

IN(MIN) = (Intended VOUT

) + (V DROPOUT (MAX))

1%

1kΩ

SPX2815

10µF

1%

330W

1%

+

4.7µF

5V

ADJ

IN

OUT

(Note A)

1K

1k

TTL

Input

2N3904

DROPOUT (MAX)

Note A: V

IN(MIN)

= (Intended V

OUT

) + (V

)

V

IN

Figure 10. Recommended Connections for Best Results

Figure 8. Improving Ripple Rejection

SPX2815

R 2

R 1

Connect R

2

to Load

R L

Connect R to

Case of Regulator

RP Parasitic Line

Resistance

ADJ

VOUT

VIN

IN

OUT

I ADJ

SPX2815

C1

R

1

R

2

VOUT

VIN

C

2

V

OUT =V REF (1+R 2 /R1) +I ADJ R 2

V

REF

50µA

ADJ

4.7µF +

Figure 7. Typical Adjustable Regulator

APPLICATION INFORMATION: Continued

Top View

TO-263-3 (T)

1

2

3

Front View

TO-220-3 (U)

1

23

Front View

TO-252 (R)

ADJ/GND

V

OUT

1

23

V

IN

ADJ/GND

V

OUT

V

IN

ADJ/GND

V

OUT

V

IN

PINOUTS

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