Data Sheet
1A ULTRA LOW DROPOUT LINEAR REGULATOR
General Description
The AZ2940 is a low dropout three-terminal regulator
with a typical dropout of 280mV at 1A output current.
The AZ2940 provides current limit and thermal shut-
down. On-chip thermal shutdown provides protection
against any combination of high current and ambient
temperature that would create excessive junction tem-
peratures.
The AZ2940 has 2.5V, 3.3V and 5.0V versions.
The AZ2940 is available in the industry standard TO-
220-3, TO-263-3 and TO-252-2 (1) power packages.
AZ2940
Features
·
·
·
·
·
·
·
Minimum Guaranteed Output Current: 1A
Dropout Voltage at I
OUT
=1A: 280mV
Output Accuracy:
±
1%
Low Ground Current
Internal Current Limit and Thermal Protection
Reversed-battery and Reversed-lead Insertion
Protection
Fast Transient Response
Applications
·
·
·
·
·
·
·
LCD TV
Set Top Box
LCD Monitor
SMPS Post Regulator
Laptop, Palmtop and Notebook
Portable Instrumentation
USB Power Supply
TO-220-3
TO-263-3
TO-252-2 (1)
Figure 1. Package Types of AZ2940
Mar. 2007 Rev. 1. 6
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BCD Semiconductor Manufacturing Limited
Data Sheet
1A ULTRA LOW DROPOUT LINEAR REGULATOR
Pin Configuration
AZ2940
T Package
(TO-220-3)
S Package
(TO-263-3)
D Package
(TO-252-2 (1))
3
2
1
V
OUT
GND
V
IN
3
2
1
V
OUT
GND
V
IN
3
2
1
V
OUT
GND
V
IN
Figure 2. Pin Configuration of AZ2940 (Top View)
Pin Description
Pin Number
1
2
3
Pin Name
V
IN
GND
V
OUT
Unregulated Input.
Function
Ground pin. This pin and TAB are internally connected.
Regulated Output.
Mar. 2007 Rev. 1. 6
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BCD Semiconductor Manufacturing Limited
Data Sheet
1A ULTRA LOW DROPOUT LINEAR REGULATOR
Functional Block Diagram
AZ2940
V
IN
1
3
V
OUT
1.24V
Reference
+
-
16V
Thermal
Shutdown
2
GND
Figure 3. Functional Block Diagram of AZ2940
Mar. 2007 Rev. 1. 6
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BCD Semiconductor Manufacturing Limited
Data Sheet
1A ULTRA LOW DROPOUT LINEAR REGULATOR
Ordering Information
AZ2940
Circuit Type
-
E1: Lead Free
Blank: Tin Lead
TR: Tape and Reel
Blank: Tube
2.5: Fixed Output 2.5V
3.3: Fixed Output 3.3V
5.0: Fixed Output 5.0V
AZ2940
Package
T: TO-220-3
S: TO-263-3
D: TO-252-2 (1)
Package
Temperature
Range
o
Part Number
Tin Lead
AZ2940T-2.5
AZ2940T-3.3
AZ2940T-5.0
AZ2940S-2.5
AZ2940S-2.5TR
AZ2940S-3.3
Lead Free
AZ2940T-2.5E1
AZ2940T-3.3E1
AZ2940T-5.0E1
AZ2940S-2.5E1
AZ2940S-2.5TRE1
AZ2940S-3.3E1
AZ2940S-3.3TRE1
AZ2940S-5.0E1
AZ2940S-5.0TRE1
AZ2940D-2.5E1
AZ2940D-2.5TRE1
AZ2940D-3.3E1
AZ2940D-3.3TRE1
AZ2940D-5.0E1
AZ2940D-5.0TRE1
Marking ID
Tin Lead
AZ2940T-2.5
AZ2940T-3.3
AZ2940T-5.0
AZ2940S-2.5
AZ2940S-2.5
AZ2940S-3.3
AZ2940S-3.3
AZ2940S-5.0
AZ2940S-5.0
AZ2940D-2.5
AZ2940D-2.5
AZ2940D-3.3
AZ2940D-3.3
AZ2940D-5.0
AZ2940D-5.0
Lead Free
AZ2940T-2.5E1
AZ2940T-3.3E1
AZ2940T-5.0E1
AZ2940S-2.5E1
AZ2940S-2.5E1
AZ2940S-3.3E1
AZ2940S-3.3E1
AZ2940S-5.0E1
AZ2940S-5.0E1
AZ2940D-2.5E1
AZ2940D-2.5E1
AZ2940D-3.3E1
AZ2940D-3.3E1
AZ2940D-5.0E1
AZ2940D-5.0E1
Packing
Type
Tube
Tube
Tube
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
TO-220-3
-40 to 125
C
TO-263-3
-40 to 125
C
o
AZ2940S-3.3TR
AZ2940S-5.0
AZ2940S-5.0TR
AZ2940D-2.5
AZ2940D-2.5TR
TO-252-2
(1)
-40 to 125
o
C
AZ2940D-3.3
AZ2940D-3.3TR
AZ2940D-5.0
AZ2940D-5.0TR
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.
Mar. 2007 Rev. 1. 6
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BCD Semiconductor Manufacturing Limited
Data Sheet
1A ULTRA LOW DROPOUT LINEAR REGULATOR
Absolute Maximum Ratings (Note 1)
Parameter
Input Voltage
Operating Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering, 10sec)
Thermal Resistance
Symbol
V
IN
T
J
T
STG
T
LEAD
θ
JA
AZ2940
Value
16
150
-65 to 150
260
TO-220-3
TO-263-3
TO-252-2 (1)
60
Unit
V
o
C
o
o
C
C
o
60
100
C/W
ESD (Human Body Model)
ESD (Machine Model)
ESD
ESD
5000
300
V
V
Note 1: 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 Max-
imum Ratings" for extended periods may affect device reliability.
Recommended Operating Conditions
Parameter
Input Voltage
Operating Junction Temperature
Symbol
V
IN
T
J
-40
Min
Max
13.2
125
Unit
V
o
C
Mar. 2007 Rev. 1. 6
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BCD Semiconductor Manufacturing Limited
