en5365 Enpirion, en5365 Datasheet - Page 3

• Manufacturer Part Number: en5365
• Description: 6a Voltage Mode Synchronous Buck Pwm Dc-dc Converter With Integrated Inductor 3-pin Vid Output Voltage Select
• Manufacturer: Enpirion

September 2007
Pin Descriptions
©Enpirion 2007 all rights reserved, E&OE
14-20
21-23
24-29
30-35
36-37
41-42
6-13
PIN
1-3
4-5
38
39
40
43
44
45
46
47
48
49
50
51
52
VSENSE
ENABLE
EAOUT
NAME
COMP
PGND
ROCP
AGND
VOUT
PVIN
AVIN
EAIN
POK
VS2
VS1
VS0
NC
NC
NC
NC
NC
NC
SS
NO CONNECT: These pins should not be electrically connected to each other or to
any external signal, voltage, or ground. One or more of these pins may be connected
internally.
NO CONNECT: These pins should not be electrically connected to each other or to
any external signal, voltage, or ground.
CAUTION!: Internally connected to switching node. Take care to route signals away
from these pins.
NO CONNECT: These pins should not be electrically connected to each other or to
any external signal, voltage, or ground. One or more of these pins may be connected
internally.
Regulated converter output. Decouple with output filter capacitor to PGND. Refer to
layout section for specific layout requirements
NO CONNECT: These pins should not be electrically connected to each other or to
any external signal, voltage, or ground.
CAUTION!: Internally connected to switching node. Take care to route signals away
from these pins.
Output power ground. Refer to layout section for specific layout requirements.
Input power supply. Connect to input power supply. Decouple with input capacitor to
PGND. Refer to layout section for specific layout requirements
NO CONNECT: These pins should not be electrically connected to each other or to
any external signal, voltage, or ground. One or more of these pins may be connected
internally.
Optional Over Current Protection adjust pin. Used for diagnostic purposes only. Place
10kΩ
to approximately 200% of maximum rated current.
Analog voltage input for the controller circuits.
Connect this pin to PVIN using a 1 Ohm resistor.
Analog ground for the controller circuits.
NO CONNECT: These pins should not be electrically connected to each other or to
any external signal, voltage, or ground. One or more of these pins may be connected
internally.
Voltage select line 2 input. See Table 1. This pin has internal pull-up
Voltage select line 1 input. See Table 1. This pin has internal pull-up
Voltage select line 0 input. See Table 1. This pin has internal pull-up
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. Size pull-up resistor
to limit current to 4mA when POK is low.
Output Voltage Sense. Connect to output voltage immediately downstream from the
output filter capacitors.
Soft-Start node. The soft-start capacitor is connected between this pin and AGND.
The value of this capacitor determines the startup timing.
Optional Error Amplifier input. Allows for customization of the control loop.
Optional Error Amplifier output. Allows for customization of the control loop.
Optional Error Amplifier Buffer output. Allows for customization of the control loop.
Input Enable. Applying a logic high, enables the output and initiates a soft-start.
Applying a logic low disables the output.
resistor between this pin and AGND (pin 40) to raise the over current trip point
3
FUNCTION
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