AS1117
800mA Low Dropout Regulator
SCSI-II Active Terminator
FEATURES
•
Guaranteed 800mA Output
•
Three Terminal Adjustable Or Fixed 1.5V, 2.5V, 3V, 3.3V & 5V
•
Very Low Quiescent Current
•
Low Dropout Voltage Of 1.2 Volts At Full Load
•
Extremely Tight Load And Line Regulation
•
Very Low Temperature Coefficient
•
Logic-Controlled Electronic Shutdown
•
Internal Overcurrent Limiting & Thermal Overload Protection
•
Surface Mount Package SOT-223, TO-252, TO-220, SOT-89, TO-263, & SO-8
APPLICATIONS
•
SCSI-II Active Terminator
•
Portable/ Palm Top / Notebook Computers
•
Battery Chargers
•
Disk Drives
•
Portable Consumer Equipment
•
Portable Instrumentation
•
SMPS Post-Regulator
PRODUCT DESCRIPTION
The AS1117 is a low power positive-voltage regulator designed to meet 800mA output current and comply with SCSI-II specifications
with a fixed output voltage of 2.85V. This device is an excellent choice for use in battery-powered applications, as active terminators
for the SCSI bus, and portable computers. The AS1117 features very low quiescent current and very low dropout voltage of 1.2V at a
full load and lower as output current decreases. AS1117 is available as an adjustable or fixed 1.5V, 2.5V, 3.0V, 3.3V, and 5.0V output
voltages.
The AS1117 is offered in a 3-pin surface mount package SOT-223, TO-252, TO-220 and TO-263. The output capacitor of 10µF or
larger is needed for output stability of AS1117 as required by most of the other regulator circuits.
ORDERING INFORMATION
TO-220
3-PIN
AS1117U
AS1117U-X
TO-263
3-PIN
AS1117T
AS1117T-X
SOT-223
3-PIN
AS1117M3
AS1117M3-X
PLASTIC
SOIC 8 PIN
AS1117S
AS1117S-X
TO-252
DPAK
AS1117R
AS1117R-X
Oper. Temp.
Range
-40°C to +85°C
-40°C to +85°C
X= Output Voltage (X = 1.5V, 2.5V, 3.0V, 3.3V, 5.0, or Blank for Adjustable)
PIN CONNECTIONS
8-Pin Surface Mount (S)
TO-220-3 (U)
SOT-223 (M3)
TO-263-3 (T)
TO-252 (R)
GND
N/C
V
OUT
V
OUT
1
2
3
4
8
7
V
IN
V
IN
V
IN
N/C
AS1117
AS1117
1
2
3
1
2
3
1
ADJ/GND V
OUT
V
IN
AS1117
2
3
1
AS1117
2
3
AS1117
6
5
Top View
ADJ/GND V
OUT
V
IN
Top View
ADJ/GND V
OUT
V
IN
ADJ/GND V
OUT
V
IN
Top View
Front View
Front View
Rev. 10/6/00
SIPEX [ SIPEX CORPORATION ]
