EP53F8QI Datasheet, PDF (2/11 Pages) Enpirion, Inc. – 1500 mA Synchronous Buck PWM DC-DC Converter with Integrated Inductor

Ordering Information
EP53F8QI
Pin Assignments (Top View)
Part Number
EP53F8QI-T
EP53F8QI-E
Temp Rating
(°C)
Package
-40 to +85
16-pin QFN T&R
QFN Evaluation Board
Figure 3: Pin 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
AVIN2
VFB
NC
VOUT
AGND
AVIN1
POK
ENABLE
PVIN
FUNCTION
No Connect. These pins are internally connected to the common drain output 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.
Input/Output Power Ground. Connect these pins to the ground electrode of the input and
output filter capacitors. Refer to Layout Considerations section for details.
Analog input voltage. Connect to AVIN1 only.
Feedback Pin for External Voltage Divider Network. Connect a resistor divider to this pin to
set the output voltage. Use 100 kΩ, 1% or better for the upper resistor.
No Connect.
Voltage and Power Output. Connect these pins to output capacitor(s).
Analog Ground for the Controller Circuits
Analog Voltage Input for the Controller Circuits. Connect this pin to PVIN with a 10Ω
resistor. Connect a 1 uF capacitor between this pin and AGND. Connect AVIN2 to this pin.
Power OK with an Open Drain Outp t. Refer to Power OK section.
Input Enable. A logic high signal on this pin enables the output and initiates a soft start. A
logic low signal disables the output and discharges the output to GND. This pin must not be
left floating.
Input Power Supply. Connect to input supply. Decouple with input capacitor(s) to PGND.
©Enpirion 2009 all rights reserved, E&OE
01542
2
4/3/2009
www.enpirion.com
Rev:A