EP5357LUI/EP5357HUI
Ordering Information
Pin Assignments (Top View)
Part Number
Comment
Package
EP5357LUI
LOW VID Range
16-pin QFN T&R
16
15
EP5357HUI
HIGH VID Range 16-pin QFN T&R
EP5357LUI Evaluation Board
EP5357HUI Evaluation Board
1
2
3
4
5
6
NC(SW)
PGND
LLM
14 PVIN
13 AVIN
12 ENABLE
11 VS0
EP5357LUI-E
EP5357HUI-E
VFB
VSENSE
AGND
10 VS1
VS2
9
7
8
Figure 3: EP5357LUI Pin Out Diagram (Top View)
16
15
1
2
3
4
5
6
NC(SW)
PGND
LLM
14 PVIN
13 AVIN
12 ENABLE
11 VS0
NC
VSENSE
AGND
10 VS1
VS2
9
7
8
Figure 4: EP5357HUI Pin Out Diagram (Top View)
Pin Description
PIN
NAME
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.
1, 15,
16
NC(SW)
2
3
PGND
LLM
LLM (Light Load Mode – “LLM”) pin. Logic-High enables automatic LLM/PWM and logic-
low places the device in fixed PWM operation. LLM pin should be connected to ENABLE,
or should be disabled before ENABLE is pulled low.
EP5357LUI: Feed back pin for external divider option.
EP5357HUI: No Connect
Sense pin for preset output voltages. Refer to application section for proper configuration.
4
5
VFB/NC
VSENSE
©Enpirion 2012 all rights reserved, E&OE
2
www.enpirion.com
03409
September 12, 2012
Rev: D
ENPIRION [ ENPIRION, INC. ]
