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EN5396QI-E Datasheet(PDF) 3 Page - Enpirion, Inc.

Part # EN5396QI-E
Description  9A Synchronous Buck PWM DC-DC Converter with Integrated Inductor External Output Voltage Programming
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Manufacturer  ENPIRION [Enpirion, Inc.]
Direct Link  http://www.enpirion.com
Logo ENPIRION - Enpirion, Inc.

EN5396QI-E Datasheet(HTML) 3 Page - Enpirion, Inc.

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02393
11/12/2009
Rev:C
EN5396QI
Pin Descriptions
PIN
NAME
FUNCTION
1-3
NC
NO CONNECT – This pin should not be electrically connected to any external signal, voltage,
or ground, but must be soldered to PCB. This pin may be connected internally.
4-5
NC(SW)
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.
6-13
NC
NO CONNECT – This pin should not be electrically connected to any external signal, voltage,
or ground, but must be soldered to PCB. This pin may be connected internally.
14-20
VOUT
Regulated converter output. Connect these pins to the load and place output capacitor from
these pins the PGND pins 24-26.
21-22
NC(SW)
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.
23
NC
NO CONNECT – This pin should not be electrically connected to any external signal, voltage,
or ground, but must be soldered to PCB. This pin may be connected internally.
24-29
PGND
Output power ground. Refer to layout guideline section.
30-35
PVIN
Input power supply. Connect to input power supply. Decouple with input capacitor to PGND.
36-37
NC
NO CONNECT – This pin should not be electrically connected to any external signal, voltage,
or ground, but must be soldered to PCB. This pin may be connected internally.
38
ROCP
Optional Over Current Protection adjust pin. Place ROCP resistor between this pin and AGND
(pin 40) to adjust the over current trip point.
39
AVIN
Analog voltage input for the controller circuits. Connect this pin to the input power supply.
40
AGND
Analog ground for the controller circuits.
41-42
NC
NO CONNECT – This pin should not be electrically connected to any external signal, voltage,
or ground, but must be soldered to PCB. This pin may be connected internally.
43
XFB
Feedback pin for external voltage divider network.
44
XOV
Over voltage programming feedback pin.
45
NC
NO CONNECT – This pin should not be electrically connected to any external signal, voltage,
or ground, but must be soldered to PCB. This pin may be connected internally.
46
POK
Power OK is an open drain transistor for power system state indication. POK is a logic high
when VOUT is with -10% to +20% of VOUT nominal.
47
NC
NO CONNECT – This pin should not be electrically connected to any external signal, voltage,
or ground, but must be soldered to PCB. This pin may be connected internally.
48
SS
Soft-Start node. The soft-start capacitor is connected between this pin and AGND. The value
of this capacitor determines the startup timing.
49
EAIN
Optional Error Amplifier input. Allows for customization of the control loop.
50
EAOUT
Optional Error Amplifier output. Allows for customization of the control loop.
51
COMP
Output of the buffer leading to the error amplifier. Used for external modifications of the
compensation network.
52
ENABLE
Input Enable. Applying a logic high, enables the output and initiates a soft-start. Applying a
logic low disables the output.
53
PWM
PWM input/output. Used for optional master/slave configuration. When M/S pin is asserted
“low”, PWM will output the gate-drive PWM waveform. When the M/S pin is asserted “high”,
the PWM pin is configured as an input for PWM signal from the “master” device. PWM pin
can drive up to 3 slave devices.
54
NC
NO CONNECT – This pin should not be electrically connected to any external signal, voltage,
or ground, but must be soldered to PCB. This pin may be connected internally.
55
M/S
Optional Master/Slave select pin. Asserting pin “low” places device in Master Mode for current
sharing. PWM pin (53) will output PWM drive signal. Asserting pin “high” will place the device
in Slave Mode. PWM pin (53) will be configured to input (receive) PWM drive signal from
“Master” device.
56-58
NC
NO CONNECT – This pin should not be electrically connected to any external signal, voltage,
or ground, but must be soldered to PCB. This pin may be connected internally.
©Enpirion 2009 all rights reserved, E&OE
www.enpirion.com
3


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