SPX3587AR Ver la hoja de datos (PDF) - Signal Processing Technologies

Número de pieza

componentes Descripción

Fabricante

SPX3587AR

3A Low Dropout Voltage Regulator

Signal Processing Technologies 

APPLICATION INFORMATION: Continued

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Frequency, Hz

Figure 5. Ripple Rejection; Vin=3.3V, Vout=1.8V (adj.),

Iload=200mA

V IN

IN

4.7µF + C 1

SPX1587

ADJ

IOUT=

VREF

R1

OUT

VOUT

C2

R1

IOUT

LOAD

Figure 6. Current Source

VIN

IN

4.7µF + C1

SPX1587

ADJ

I ADJ

50µA

VOUT = V REF (1+R 2 /R1) +IADJR 2

OUT

VREF R1

VOUT

C2

R2

Figure 7. Typical Adjustable Regulator

(Note A)

V IN

+

4.7µF

SPX1587

5V

IN

OUT

VOUT

ADJ

R1

3301

1%

*C 1 improves ripple rejection.

ZCshould be ~ R1 at ripple frequency

1kR12 ,

1%

10µF

+ 1C01µF*

Note A: VIN(MIN) = (Intended VOUT ) + (V DROPOUT (MAX))

Figure 8. Improving Ripple Rejection

VIN

(Note A)

+

SPX1587

IN

OUT

ADJ

4.7µF

1k1

TTL

Input

1k1

2N3904

5V

3301

1%

+

10µF

1k1

1%

RPParasitic Line

Resistance

VIN

SPX1587

VOUT

ADJ

Connect R to

Case of Regulator R 1

R2

Connect R2

to Load

RL

Note A: VIN(MIN)= (Intended VOUT ) + (VDROPOUT (MAX) )

Figure 9. 5V Regulator with Shutdown

Figure 10. Recommended Connections for Best Results

Jun8-07 Rev D

SPX1587 Low-Dropout Voltage Regulator



© 2007 Sipex Corporation

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