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EP53A7LQ Datasheet(PDF) 2 Page - Enpirion, Inc.

Part No. EP53A7LQ
Description  1000mA Synchronous Buck Regulator with Integrated Inductor
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Maker  ENPIRION [Enpirion, Inc.]
Homepage  http://www.enpirion.com
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EP53A7LQ Datasheet(HTML) 2 Page - Enpirion, Inc.

 
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01543
11/11/2009
Rev:B
EP53A7LQI/EP53A7HQI
©Enpirion 2009 all rights reserved, E&OE
2
www.enpirion.com
Ordering Information
Part Number
Comment
Package
EP53A7LQI
LOW VID Range
16-pin QFN T&R
EP53A7HQI
HIGH VID Range
16-pin QFN T&R
EP53A7LQI-E
EP53A7LQI Evaluation Board
EP53A7HQI-E
EP53A7HQI Evaluation Board
Pin Assignments (Top View)
Figure 3: EP53A7LQI Pin Out Diagram (Top View)
Figure 4: EP53A7HQI Pin Out Diagram (Top View)
Pin Description
PIN
NAME
FUNCTION
1, 15,
16
NC(SW)
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.
2
PGND
Power ground. Connect this pin to the ground electrode of the Input and output filter
capacitors.
3
LLM
LLM ( Light load mode – “LLM”) pin. Logic-High enables automatic LLM/PWM and logic-
low places the device in fixed PWM operation.
4
VFB
NC
EP53A7LQI: Feed back pin for external resistor divider option.
EP53A7HQI: No Connect
5
VSENSE
Sense pin for preset output voltages. Refer to application section for proper configuration.
6
AGND
Analog ground. This is the quiet ground for the internal control circuitry, and the ground
return for external feedback voltage divider
7, 8
VOUT
Regulated Output Voltage. Refer to application section for proper layout and decoupling.


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