en5336 Enpirion, en5336 Datasheet - Page 3

• Manufacturer Part Number: en5336
• Description: 3a Voltage Mode Synchronous Buck Pwm Dc-dc Converter With Integrated Inductor External Output Voltage Programming
• Manufacturer: Enpirion

Rev 1.0 November 2006
Pin Descriptions
©Enpirion 2006 all rights reserved, E&OE
15-16
17-20
21-24
25-26
30-31
42-44
PIN
8-14
1-7
27
28
29
32
33
34
35
36
37
38
39
40
41
ENABLE
NAME
EAOUT
COMP
PGND
ROCP
AGND
VOUT
PVIN
AVIN
EAIN
XOV
POK
XFB
NC
NC
NC
NC
NC
NC
NC
SS
NO CONNECT – Do not electrically connect these pins to each other or to any other electrical
signal. CAUTION!: May be internally connected.
Regulated converter output. Connect these pins to the load and place output capacitor from
these pins the PGND pins 17-18
NO CONNECT – Do not electrically connect these pins to each other or to any other electrical
signal.
CAUTION!: Internally connected to switching node. Take care to route signals away from
these pins.
Input/Output power ground. Connect these pins to the ground electrode of the Input and
output filter capacitors. Refer to layout guideline section for details.
Input power supply. Connect to input power supply. Decouple with input capacitor to PGND.
NO CONNECT – Do not electrically connect these pins to each other or to any other electrical
signal. CAUTION!: May be internally connected.
Optional Over Current Protection adjust pin. Place ROCP resistor between this pin and AGND
(pin 40) to adjust the over current trip point.
Analog voltage input for the controller circuits. Connect this pin to the input power supply.
Analog ground for the controller circuits.
NO CONNECT – Do not electrically connect these pins to each other or to any other electrical
signal. CAUTION!: May be internally connected.
Feedback pin for external voltage divider network.
Over voltage programming feedback pin.
NO CONNECT – Do not electrically connect this pin to any electrical signal.
CAUTION!: May be internally connected.
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.
NO CONNECT – Do not electrically connect this pin to any electrical signal.
CAUTION!: May be internally connected.
Soft-Start node. The soft-start capacitor is connected between this pin and AGND. The value
of this capacitor determines the startup time.
Optional Error Amplifier input. Allows for customization of the control loop response.
Optional Error Amplifier output. Allows for customization of the control loop response.
Optional Error Amplifier Buffer output. Allows for customization of the control loop response.
Input Enable. Applying a logic high, enables the output and initiates a soft-start. Applying a
logic low disables the output.
NO CONNECT – Do not electrically connect these pins to each other or to any other electrical
signal. CAUTION!: May be internally connected.
3
FUNCTION
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