EN5339QI ENPIRION [Enpirion, Inc.], EN5339QI Datasheet - Page 2

• Manufacturer Part Number: EN5339QI
• Description: 3A Low Profile Synchronous Buck DC-DC Converter with Integrated Inductor
• Manufacturer: ENPIRION [Enpirion, Inc.]

Ordering Information
Pin Assignments (Top View)
NOTE A: NC pins are not to be electrically connected to each other or 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.
NOTE B: Grey area highlights exposed metal on the bottom of the package that is not to be mechanically or electrically
connected to the PCB. There should be no traces on PCB top layer under these keep out areas.
NOTE C: White ‘dot’ on top left is pin 1 indicator on top of the device package.
Pin Description
©Enpirion 2012 all rights reserved, E&OE
PIN
06903
1, 21-24
2-3, 8-9
Part Number
EN5339QI-E
Packing and Marking
EN5339QI
4-7
10
11
NAME
NC(SW)
PGND
VOUT
TST2
TST1
Package Markings
Information:
EN5339
EN5339
FUNCTION
NO CONNECT: These pins are internally connected to the common switching node of the
internal MOSFETs. They must be soldered to PCB but not be electrically connected to any
external signal, ground, or voltage. Failure to follow this guideline may result in device
damage.
Input and output power ground. Connect these pins to the ground electrode of the input and
output filter capacitors. See VOUT, PVIN descriptions and Layout Recommendation for more
details.
Regulated converter output. Connect to the load and place output filter capacitor(s) between
these pins and PGND pins 8 and 9. See layout recommendation for details
Test Pin. For Enpirion internal use only. Connect to AVIN at all times.
Test Pin. For Enpirion internal use only. Connect to AVIN at all times.
http://www.enpirion.com/resource-center-packing-and-marking-information.htm
Figure 3: Pin Out Diagram (Top View)
Temp Rating (° C)
-40 to +85
September 12, 2012
QFN Evaluation Board
24-pin (4mm x 6mm x 1.1mm) QFN T&R
Package Description
www.enpirion.com, Page 2
EN5339QI
Rev: B