03541

5/29/2009

Rev:A

EP5358LUI/EP5358HUI

©Enpirion 2009 all rights reserved, E&OE

2

www.enpirion.com

Ordering Information

Part Number

Comment

Package

EP5358LUI

LOW VID Range

16-pin QFN T&R

EP5358HUI

HIGH VID Range

16-pin QFN T&R

EP5358LUI-E

EP5358LUI Evaluation Board

EP5358HUI-E

EP5358HUI Evaluation Board

Pin Assignments (Top View)

PVIN

AVIN

ENABLE

VS0

VS1

VS2

NC(SW)

PGND

PGND

VFB

VSENSE

AGND

3

1

4

2

6

5

16

15

78

12

11

13

10

9

14

Figure 3: EP5358LUI Pin Out Diagram (Top View)

PVIN

AVIN

ENABLE

VS0

VS1

VS2

NC(SW)

PGND

PGND

NC

VSENSE

AGND

3

1

4

2

6

5

16

15

78

12

11

13

10

9

14

Figure 4: EP5358HUI Pin Out Diagram (Top View)

Pin Description

PIN

NAME

FUNCTION

1, 15,

16

NC(SW)

NO CONNECT – These pins are internally connected to the common switching node of the

internal MOSFETs. NC (SW) pins are not to be electrically connected to any external signal,

ground, or voltage. However, they must be soldered to the PCB. Failure to follow this

guideline may result in part malfunction or damage to the device.

2,3

PGND

Power ground. Connect this pin to the ground electrode of the Input and output filter

capacitors.

4

VFB/NC

EP5358LUI: Feed back pin for external divider option.

EP5358HUI: No Connect

5

VSENSE

Sense pin for preset output voltages. Refer to application section for proper configuration.

6

AGND

Analog ground. This is the quiet ground for the internal control circuitry, and the ground

return for external feedback voltage divider

7, 8

VOUT

Regulated Output Voltage. Refer to application section for proper layout and decoupling.

9, 10,

11

VS2, VS1,

VS0

Output voltage select. VS2 = pin 9, VS1 = pin 10, VS0 = pin 11.

EP5358LUI: Selects one of seven preset output voltages or an external resistor divider.

EP5358HUI: Selects one of eight preset output voltages.

(Refer to section on output voltage select for more details.)