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MC34268DT Datenblatt(PDF) 1 Page - ON Semiconductor

Teilenummer MC34268DT
Bauteilbeschribung  SCSI-2 Active Terminator Regulator
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Hersteller  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
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© Semiconductor Components Industries, LLC, 2000
April, 2000 – Rev. 1
1
Publication Order Number:
MC34268/D
MC34268
SCSI-2 Active Terminator
Regulator
The MC34268 is a medium current, low dropout positive voltage
regulator specifically designed for use in SCSI–2 active termination
circuits.
This device offers the circuit designer an economical
solution for precision voltage regulation, while keeping power losses
to a minimum. The regulator consists of a 1.0 V dropout composite
PNP/NPN pass transistor, current limiting, and thermal limiting.
These devices are packaged in the 8–pin SOP–8 and 3–pin DPAK
and SOT–223 surface mount power packages.
Applications include active SCSI–2 terminators and post
regulation of switching power supplies.
2.85 V Output Voltage for SCSI–2 Active Termination
1.0 V Dropout
Output Current in Excess of 800 mA
Thermal Protection
Short Circuit Protection
Output Trimmed to 1.4% Tolerance
No Minimum Load Required
Space Saving DPAK, SOT–223 and SOP–8 Surface Mount Power
Packages
Simplified Block Diagram
Input
Thermal
Limiting
Control
Circuit
Current
Limit
Output
Ground
http://onsemi.com
See detailed ordering and shipping information in the package
dimensions section on page 3 of this data sheet.
ORDERING INFORMATION
8
1
8
7
6
5
1
2
3
4
Gnd
SOP–8
D SUFFIX
CASE 751
DPAK
DT SUFFIX
CASE 369A
Input
NC
NC
12
3
(Top View)
(Top View)
1
3
Output
Output
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
SOT–223
ST SUFFIX
CASE 318E
1
3
Pin 1. Ground
2. Output
3. Input
4. Output
4
MARKING
DIAGRAMS
ALYW
34268
1
8
34268
ALYWW
AYW
268ST
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week


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