Diodes AZ317 User Manual
General description, Features, Applications

3-TERMINAL 1A ADJUSTABLE VOLTAGE REGULATOR AZ317
Data Sheet
1
Jan. 2013 Rev. 1. 6
BCD Semiconductor Manufacturing Limited
General Description
The AZ317 is an adjustable three-terminal positive
voltage regulator with a very low dropout of 1.2V at
1A output current. Using 2 external resistors, the
AZ317 can provide an adjustable output voltage down
to 1.25V.
The AZ317 includes a circuit of trimmed bandgap ref-
erence to assure output voltage accuracy to be within
1%. It also provides current limiting and thermal shut-
down. The current limit is trimmed to ensure specified
output current and controlled short-circuit current. The
On-chip thermal limiting provides protection against
any combination of overload and ambient temperature
that would create excessive junction temperature.
The AZ317 is available in the standard SOT-223, TO-
220-3, TO-252-2 (1), TO-252-2 (3) and TO-263-3
power packages.
Features
·
Typical 1% Output Voltage Tolerance
·
Typical 0.01%/V Line Regulation
·
Typical 0.2% Load Regulation
·
Very Low Dropout Voltage: 1.2V at 1A Output
Current
·
Trimmed Current Limit
·
On-chip Thermal Protection
·
Operation Junction Temperature: 0 to 125
o
C
Applications
·
PC Motherboard
·
LCD Monitor
·
Graphic Card
·
DVD Player
·
Network Interface Card/Switch
·
Telecom Equipment
·
Printer and other Peripheral Equipment
Figure 1. Package Types of AZ317
SOT-223
TO-220-3
TO-252-2 (1)
TO-263-3
TO-252-2 (3)