Data Sheet
3-TERMINAL 1A ADJUSTABLE VOLTAGE REGULATOR
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.
AZ317
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
SOT-223
TO-220-3
TO-252-2 (1)
TO-252-2 (3)
Figure 1. Package Types of AZ317
TO-263-3
Jan. 2013 Rev. 1. 6
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BCD Semiconductor Manufacturing Limited
Data Sheet
3-TERMINAL 1A ADJUSTABLE VOLTAGE REGULATOR
Pin Configuration
H Package
(SOT-223)
3
V
OUT
INPUT
AZ317
T Package
(TO-220-3)
3
2
1
OUTPUT
V
OUT
INPUT
OUTPUT
ADJ
2
1
ADJ
D Package
(TO-252-2(1))
3
V
OUT
INPUT
OUTPUT
ADJ
S Package
(TO-252-2(3))
3
2
1
INPUT
OUTPUT
ADJ
(TO-263-3)
3
2
1
INPUT
OUTPUT
ADJ
2
1
Figure 2. Pin Configuration of AZ317 (Top View)
Functional Block Diagram
3
INPUT
Thermal
Shutdown
Current
Limiter
_
+
+
2
OUTPUT
1
ADJ
Figure 3. Functional Block Diagram of AZ317
Jan. 2013 Rev. 1. 6
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BCD Semiconductor Manufacturing Limited
Data Sheet
3-TERMINAL 1A ADJUSTABLE VOLTAGE REGULATOR
Ordering Information
AZ317
AZ317
Circuit Type
-
E1: Lead Free
G1: Green
TR: Tape and Reel
Blank: Tube
Package
H: SOT-223
T: TO-220-3
D: TO-252-2 (1)
/TO-252-2 (3)
S: TO-263-3
Package
Temperature
Range
0 to 125
o
C
0 to 125
o
C
0 to 125
o
C
Part Number
Lead Free
AZ317HTR-E1
AZ317T-E1
AZ317DTR-E1
AZ317S-E1
Green
AZ317HTR-G1
AZ317T-G1
AZ317DTR-G1
AZ317S-G1
AZ317STR-G1
Marking ID
Lead Free
EH31A
AZ317T-E1
AZ317D-E1
AZ317S-E1
AZ317S-E1
Green
GH31A
AZ317T-G1
AZ317D-G1
AZ317S-G1
AZ317S-G1
Packing
Type
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
SOT-223
TO-220-3
TO-252-2 (1)/
TO-252-2 (3)
TO-263-3
0 to 125 C
o
AZ317STR-E1
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with
"G1" suffix are available in green packages.
Jan. 2013 Rev. 1. 6
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BCD Semiconductor Manufacturing Limited
Data Sheet
3-TERMINAL 1A ADJUSTABLE VOLTAGE REGULATOR
Absolute Maximum Ratings (Note 1)
Parameter
Input Voltage
Maximum Junction Temperature
Storage Temperature
Lead Temperature (Soldering, 10sec)
ESD (Human Body Model)
Symbol
V
IN
T
J
T
S
T
LEAD
ESD
-65
Min
Max
20
150
150
300
4000
Unit
V
o
AZ317
C
C
C
o
o
V
Note1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the
device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond
those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum
Ratings" for extended periods may affect device reliability.
Recommended Operating Conditions
Parameter
Input Voltage
Operating Junction Temperature Range
Symbol
V
IN
T
J
Min
V
OUT
+2
0
Max
15
125
Unit
V
o
C
Jan. 2013 Rev. 1. 6
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BCD Semiconductor Manufacturing Limited
Data Sheet
3-TERMINAL 1A ADJUSTABLE VOLTAGE REGULATOR
Electrical Characteristics
(Typicals and limits apply for T
J
=25
o
C,
P≤ Maximum Power Dissipation
unless otherwise specified.)(Note 2)
Parameter
Reference Voltage
Line Regulation
Load Regulation
Thermal Regulation
Dropout Voltage
Current Limit
Adjust Pin Current
Adjust Pin Current Change
Minimum Load Current
Ripple Rejection
Temperature Stability
Long -Term Stability
RMS Output Noise (% of V
OUT
)
Thermal Resistance,
Junction to Case
T
A
=125
o
C, 1000hrs
T
A
=25
o
C, 10Hz
≤
f
≤
10kHz
SOT-223
TO-252-2 (1)/(3)
TO-220
TO-263
Junction Temperature
1.4V≤(V
IN
-V
OUT
)
≤
10V,
10mA
≤I
OUT
≤1A
3V≤ (V
IN
-V
OUT
)
≤
15V
f =120Hz, C
OUT
=1μF Tantalum,
(V
IN
-V
OUT
) = 3V, I
OUT
=1A
60
ΔV
I
LIMIT
Symbol
V
REF
S
V
Si
Conditions
10mA≤I
OUT
≤1A,
3V≤ (V
IN
-V
OUT
)
≤10V
I
OUT
≤
20mA, 3V≤V
IN
-V
OUT
≤10V
V
IN
-V
OUT
= 2V, 10mA≤I
OUT
≤1A
20ms Pulse
I
OUT
=
1A
(V
IN
-V
OUT
) = 2V
1.2
Min
1.20
Typ
1.25
0.01
0.2
0.04
1.2
1.5
50
0.2
3.5
75
1
0.3
0.003
15
10
4.5
4
150
25
Max
1.30
0.04
0.4
0.07
1.3
1.8
100
5
10
Unit
V
%/V
%
%/W
V
A
μA
μA
mA
dB
%
%
%
o
C/W
AZ317
Thermal Shutdown
Thermal Shutdown Hysteresis
o
C
o
C
Note 2: Maximum Power Dissipation is Package Type and Case Temperature dependent. Please see Figure 12.
Jan. 2013 Rev. 1. 6
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BCD Semiconductor Manufacturing Limited
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