SMS64

Preliminary

Summit Microelectronics, Inc

2060 2.22 10/09/03

6

Pin

Number

Pin

Type

Pin Name

Description

37

PWR

VGG_CAP

VGG_CAP is a charge storage connection for the internal charge pump

of the SMS64. This capacitor should be of sufficient size so as to provide

current, under varying load conditions, to the PUP outputs that are

programmed as high side drivers. For most applications this can be tied to a

01

µF capacitor.

40

O

41

O

42

O

43

O

45

O

46

O

The points of use power enable (PUP) outputs are used when cascading

or sequencing external supplies such as LDO’s DC-to-DC converters or

MOSFETs.

The output can be configured as an open drain active high or active low

output. In both configurations an external pull-up resistor is required.

The output can also be configured as a high-side driver output. The

output voltage for this configuration can be set at 10.5V or 14.5V.

PACKAGE & PIN CONFIGURATION

48 PIN TQFP

1

2

3

4

5

6

7

8

9

10

11

12

36

35

34

33

32

31

30

29

28

27

26

25

SMS64

VM

E

VM

D

VM

C

VM

F

VM

B

VM

A

VCC

A

VCC

C

VCC

B

VCC

D

VCC

F

VCC

E

VCC_CAP

A2

A1

CS#

HEALTHY#

RST_A#

RST_B#

IRQ#

WLDI

PIN DESCRIPTIONS CONT’D