SC560

7

Pin Con gurations and Descriptions

Pin #

Pin

Name

Pin Function

SC560A

SC560B

SC560C

SC560

Fixed Output

1

1

1

1

OUTB

Output for LDOB

2

2

2

2

VIN

Input supply voltage terminal

3

3

3

3

OUTA

Output for LDOA

4

4

4

FBA

Feedback sense pin for LDOA — Connect this pin to an

external resistor divider to set V

OUTA

5

5

5

5

GND

Analog and digital ground

6

6

6

6

EN

Logic input — active HIGH enables both LDOs for the SC560A and

SC560C, or LDOA for all other variants. EN must be active in the

SC560B and the xed output variants before ENB can be activated.

7

7

BYP

LDO bypass output — Bypass with a 22nF capacitor

7

4

ENB

Logic input — active HIGH enables LDOB for SC560B and the xed

voltage variants.

7

8

PGOOD

Power Good output — monitors the level of LDOA, switches low

when the output drops out of regulation (PGOOD is open drain).

8

8

8

FBB

Feedback sense pin for LDOB — Connect this pin to an external

resistor divider to set V

OUTB

Typical Characteristics (continued)

SC560A Noise Spectrum

1

10

100

1000

10000

0 .01

0 .1

1

10

100

1000

Frequency (kHz)

V

SC560A PSRR vs. Frequency (Both LDOs)

0

10

20

30

40

50

60

70

80

90

0 .1

1

10

100

1000

10000

Frequency (kHz)

V