at9173eg AME, Inc., at9173eg Datasheet - Page 3

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at9173eg

Manufacturer Part Number
at9173eg
Description
Bus Termination Regulator
Manufacturer
AME, Inc.
Datasheet

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AT9173
n Pin Configuration
n Pin Description
Rev. C.05
* By SOP-8/PP only
1
8
Pin name
AT9173
Top View
GND Pad*
SOP- 8
REFEN
VCNTL
GND
OUT
NC*
7
2
IN
AME, Inc.
3
6
5
4
Input voltage pin which supplies current to the V
decoupled voltage to prevent the input rail from dropping during large load transient. A
large and low ESR capacitor is recommended to use that should be placed as close as
possible to the V
Ground pin. Tie directly to ground plance.
Voltage control pin which supplies the internal control circuitry and provides the drive
voltage. The driving capability of output current is proportioned to the VCNTL. Connect
this pin to 5V bias supply to handle large output current with at least 1uF capacitor from
this pin to GND. An important note is that V
Reference voltage input and active low shutdown control pin. Two resistors dividing
down the V
GND to turn off the device by an open-drain, such as 2N7002 N-Channel MOSFET.
Regulator output. V
bus resistors. It is capable of sinking and sourcing current while regulating the output
rail. To maintain adequate large signal transient response, typical value of 1000uF
electrolytic capacitor with 10uF ceramic capacitors are recommended to reduce the
effects of current transients on V
No Connection. Not internal connected.
Connected to GND plance for better heat dissipation.
AT9173A
1. IN
2. GND
3. REFEN
4. OUT
5. VCNTL
6. VCNTL
7. VCNTL
8. VCNTL
IN
voltage on this pin to create the regulatedoutput voltage. Pulling this pin to
IN
pin.
OUT
is regulated from REFEN voltage that is used to terminate the
Pin Description
OUT
8
1
SOP- 8/PP
.
Top View
AT9173
7
2
IN
6
3
Bus Termination Regulator
should be kept lower or equal to VCNTL.
OUT
5
4
pin. Connect this pin to a well-
AT9173E
1. IN
2. GND
3. REFEN
4. OUT
5. NC
6. VCNTL
7. NC
8. NC
3

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