EP5348UI Datasheet, PDF (2/12 Pages) Enpirion, Inc. – 400mA Synchronous Buck Regulator with Integrated Inductor

Ordering Information
Part Number
Package
EP5348UI
14-pin µQFN T&R
EVB-EP5348UI EP5348UI Evaluation Board
EP5348UI
Pin Assignments (Top View)
NC(SW) 1
PGND 2
NC 3
VFB ⁴
AGND 5
14 13
EP5348UI
67
12 PVIN
11 AVIN
10 ENABLE
9 NC
8 NC
Figure 2: EP5348UI Pin Out Diagram (Top View)
Pin Description
PIN
1, 13,
14
2
3, 8, 9
4
5
6, 7
10
11
12
NAME
NC(SW)
PGND
NC
VFB
AGND
VOUT
ENABLE
AVIN
PVIN
FUNCTION
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.
Power ground. Connect this pin to the ground electrode of the Input and output filter
capacitors.
NO CONNECT: These pins may already be connected inside the device. Therefore, they
cannot be electrically connected to each other or to any external signal, voltage, or ground.
They must however be soldered to the PCB. Failure to follow this guideline may result in
device damage.
Feedback pin for external voltage divider network.
Analog ground. This is the quiet ground for the internal control circuitry, and the ground
return for external feedback voltage divider
Regulated Output Voltage. Refer to application section for proper layout and decoupling.
Output Enable. Enable = logic high; Disable = logic low
Input power supply for the controller circuitry. Connect to VIN at a quiet point.
Input Voltage for the MOSFET switches.
05721
2
October 11, 2013
www.altera.com/enpirion
Rev D