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PDF AZ2940 Data sheet ( Hoja de datos )
| Número de pieza | AZ2940 | |
| Descripción | 1A ULTRA LOW DROPOUT LINEAR REGULATOR | |
| Fabricantes | Diodes | |
| Logotipo |  |
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A Product Line of
Diodes Incorporated
AZ2940
1A ULTRA LOW DROPOUT LINEAR REGULATOR
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 shutdown. On-chip
thermal shutdown provides protection against any combination of high
current and ambient temperature that would create excessive junction
temperatures.
The AZ2940 has 1.2V, 1.8V, 2.5V, 3.3V and 5.0V versions.
The AZ2940 series is available in the industry standard TO-220-3,
TO-220F-3, TO-263-3, TO-252-2 (3), TO-252-2 (4), TO-252-2 (5) and
SOT-223 power packages. (Detailed information please refer to
pages 13, 14)
Features
Minimum Guaranteed Output Current: 1A
Dropout Voltage at IOUT = 1A: 280mV Typ. (Except 1.2V and 1.8V
Versions)
Output Accuracy: 1%
Low Ground Current
Internal Current Limit and Thermal Protection
Reversed-battery and Reversed-lead Insertion Protection
Fast Transient Response
TO-220-3, TO-263-3, TO-252-2 (3), TO-252-2 (4), TO-252-2 (5)
Lead-Free Finish; RoHS Compliant (Notes 1 & 2)
Available in “Green” Packages: TO-220-3, TO-220F-3, TO-263-3,
TO-252-2 (3), TO-252-2 (4), TO-252-2 (5) and SOT-223
Lead-Free Finish; RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
LCD TV
Set Top Box
LCD Monitor
SMPS Post Regulator
Laptop, Palmtop and Notebook
Portable Instrumentation
USB Power Supply
Notes:
1. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. All applicable RoHS exemptions applied.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Pin Assignments
(Front View)
3
2
1
TO-220-3 (Option 1)
(Front View)
3
2
1
TO-220-3 (Option 3)
AZ2940
Document number: DS37880 Rev. 3 - 2
VOUT
GND
VIN
VOUT
GND
VIN
1 of 29
www.diodes.com
(Front View)
3
2
1
TO-220-3 (Option 2)
(Front View)
3
2
1
TO-220F-3
VOUT
GND
VIN
VOUT
GND
VIN
June 2015
© Diodes Incorporated
1 page  
A Product Line of
Diodes Incorporated
AZ2940
Electrical Characteristics (Cont.)
AZ2940-1.8 Electrical Characteristics
(Operating Conditions: VIN = 2.8V, IOUT = 10mA, CIN = 10µF, COUT = 10µF, TJ = +25oC, unless otherwise specified. The Boldface applies over -
40oC to +125oC)
Symbol
VOUT
VRLINE
VRLOAD
∆VOUT/∆T
VDROP
IGND
ISC
ILOAD (MIN)
–
θJC
Parameter
Condition
Output Voltage
Line Regulation
Load Regulation
Output Voltage Temperature
Coefficient
Dropout Voltage (Note 7)
IOUT = 10mA
10mA ≤ IOUT ≤ 1A, 2.8V ≤ VIN ≤ 13.2V
IOUT = 10mA, 2.8V ≤ VIN ≤ 13.2V
VIN = 2.8V, 10mA ≤ IOUT ≤ 1A
IOUT = 10mA
∆VOUT = 1%
IOUT = 100mA
IOUT = 1A
Ground Current
VIN = 2.8V
IOUT = 750mA
IOUT = 1A
Short Circuit Current
Minimum Load Current
Output Noise Voltage (rms)
Thermal Resistance
VOUT = 0V (Note 6)
–
10Hz to 100kHz, IOUT = 100mA,
COUT = 10µF
TO-252-2 (3)/(4)/(5)
SOT-223
Min
1.782
1.764
–
–
–
–
–
–
–
1.5
–
–
–
–
Typ
1.8
1.8
3.6
5.4
36
290
330
12
18
2.2
1
400
7.8
29.7
Max
1.818
1.836
18
27
180
500
750
25
–
–
5
–
–
–
Unit
V
V
mV
mV
µV/oC
mV
mV
mA
mA
A
mA
µV
oC/W
Notes:
6. VIN = VOUT(NOMINAL)+1V.
7. Dropout voltage is defined as the input-to-output differential when the output voltage drops to 99% of its nominal value which is measured at VOUT+1V
applied to VIN. In application, VIN should be no less than 2.5V.
AZ2940
Document number: DS37880 Rev. 3 - 2
5 of 29
www.diodes.com
June 2015
© Diodes Incorporated
5 Page 
Performance Characteristics (Cont.)
Output Capacitor ESR vs. Output Current
100
C =10F
OUT
V =5V
OUT
10
T =+25OC
A
1 Stable Range
0.1
0.01
0
Unstable Range
200 400 600 800
Output Current (mA)
1000
Load Transient
0.4
AZ2940-5.0
0.2 COUT=47µF
0
-0.2
1
0.5
0
-0.5
Time (200µs/Div)
Power Dissipation vs. Case Temperature
50
45
40
35
30
25
20
15
10
5
0
-25
Package:TO-220-3
45*43mm2 Heatsink
No Heatsink
0 25 50 75
Case Temperature (oC)
100 125
A Product Line of
Diodes Incorporated
AZ2940
Load Transient
0.4
AZ2940-5.0
0.2 COUT=10µF
0
-0.2
1
0.5
0
-0.5
Time (200µs/Div)
Line Transient
0.06
AZ2940-5.0
0.04 IOUT=10mA
0.02
0
1
0.5
0
-0.5
Time (200µs/Div)
Power Dissipation vs. Case Temperature
50
45
40
35
30
25
20
15
10
5
0
-25
Package:TO-252-2 (1)/TO-252-2 (3)
45*43mm2 Heatsink
No Heatsink
0 25 50 75
Case Temperature (oC)
100 125
AZ2940
Document number: DS37880 Rev. 3 - 2
11 of 29
www.diodes.com
June 2015
© Diodes Incorporated
11 Page | ||
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