EP53A8LQI Datasheet, PDF (2/14 Pages) Enpirion, Inc. – 1000mA Synchronous Buck Regulator with Integrated Inductor

Ordering Information
Part Number
EP53A8LQI
EP53A8HQI
EP53A8LQI-E
EP53A8HQI-E
Comment
Package
LOW VID Range 16-pin QFN T&R
HIGH VID Range 16-pin QFN T&R
EP53A8LQI Evaluation Board
EP53A8HQI Evaluation Board
Pin Assignments (Top View)
EP53A8LQI/EP53A8HQI
Figure 3: EP53A8LQI Pin Out Diagram (Top View)
Figure 4: EP53A8HQI Pin Out Diagram (Top View)Pin
Description
PIN
1, 15,
16
2,3
4
5
6
7, 8
9, 10,
11
12
13
14
NAME
NC(SW)
PGND
VFB
VSENSE
AGND
VOUT
VS2, VS1,
VS0
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.
EP53A8LQI: Feed back pin for external divider option.
EP53A8HQI: No Connect
Sense pin for preset output voltages. Refer to application section for proper configuration.
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 voltage select. VS2 = pin 9, VS1 = pin 10, VS0 = pin 11.
EP53A8LQI: Selects one of seven preset output voltages or an external resistor divider.
EP53A8HQI: Selects one of eight preset output voltages.
(Refer to section on output voltage select for more details.)
Output Enable. Enable = logic high; Disable = logic low
Input power supply for the controller circuitry. Connect to PVIN through a 100 Ohm resistor.
Input Voltage for the MOSFET switches.
©Enpirion 2009 all rights reserved, E&OE
03651
2
12/16/2009
www.enpirion.com
Rev:B