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Электронный компонент: AME4311FEET

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AME, Inc.
1
AME4311
Low Voltage Shunt Regulator
n
Functional Block Diagram
l
Small packages: SOT-23, SOT-25, TO-92
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Low voltage operation, 1.24V
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Tight voltage tolerance --- 0.5%,1.0%, 1.5%
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Wide operating current ------- 80
A to 15mA
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Wide temperature range ----- -40
o
C to +85
o
C
l
Low temperature coefficient --100ppm/
o
C
(max)
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Excellent transient response
The AME4311 is a low volatge version of the industry
standard 431 shunt regulator. The AME4311 reference is
set to 1.24 volts. The output voltage can be set to any
value between 1.24V and 8V with two external resistors.
(For factory set internal feedback resistors see the
AME4312.) When used with an optocoupler these de-
vices are ideal for isolated 3.3V switching supplies.
Analog Microelectronics offers this part in a TO-92 pack-
age as well as the space saving SOT-23 and SOT-25
packages.
For isolated switching power supplies requiring volt-
ages lower than 2.7V see the AME4315.
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Battery Operating Equipments
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Adjustable Supplies
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Switching Power Supplies
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Error Amplifiers
l
Single Supply Amplifier
n
General Description
n
Features
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Applications
V+
GND
REF
V
R
=1.24
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Pin Configuration
SOT-25
Top View
TO-92
Top View
V+
GND
REF
V+ GND REF
SOT-23
Top View
REF
V+
GND
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Monitors / VCR / TV
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Personal Computers
AME, Inc.
2
Low Voltage Shunt Regulator
AME4311
n
Ordering Information
Please consult AME sales office or authorized Rep./Distributor for other voltage accuracy and package type avail-
ability.
Part Number
Marking
Output Voltage Tolerance
Package
Temp. Range
AME4311EEAT
AME
4311
EEAT
yyww
1.24
0.5%
TO-92
- 40
o
C to + 85
o
C
AME4311EEET
AVVww
1.24
0.5%
SOT-23
- 40
o
C to + 85
o
C
AME4311FEET
AVWww
1.24
1.0%
SOT-23
- 40
o
C to + 85
o
C
AME4311GEET
AVXww
1.24
1.5%
SOT-23
- 40
o
C to + 85
o
C
AME4311EEEV
AGFww
1.24
0.5%
SOT-25
- 40
o
C to + 85
o
C
AME, Inc.
3
AME4311
Low Voltage Shunt Regulator
n
Absolute Maximum Ratings
n
Recommended Operating Conditions
n
Thermal Information
Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device
Parameter
Maximum
Unit
Supply Current
20
mA
Parameter
Rating
Unit
Supply Current
100
A ~ 15mA
Ambient Temperature Range
-40 to +85
o
C
Junction Temperature
-40 to +125
o
C
Maximum
Unit
SOT-23
325
SOT-25
325
TO-92
180
Maximum Junction Temperature
150
o
C
Maximum Lead Temperature (10 Sec)
300
o
C
Parameter
Thermal Resistance
o
C / W
AME, Inc.
4
Low Voltage Shunt Regulator
AME4311
Parameter
Symbol
Min
Typ
Max
Units
V
REF
0.5%
1.234 1.240 1.246
V
V
REF
1.0%
1.228 1.240 1.252
V
V
REF
1.5%
1.221 1.240 1.258
V
Ratio of Change in V
REF
to
Cathode Voltage
V
REF
V
K
-2.7
0.3
mV/V
Reference Input Current
I
REF
1.0
A
Off State Leakage
I
K (OFF)
1000
nA
Minimum Current I
K
I
MIN
80
A
Reference Voltage Temp. Coeff.
V
REFTC
100
ppm/
o
C
Dynamic Output Impendance
r
Z
0.3
0.4
Test Circuit 2
V
REF
= 0V
V
K
= 7V
(Test Circuit 3)
V
Z
= V
REF
, I
Z
= 0.1mA to 15mA,
Frequency = OHZ
V
KA
= 6V to 8V
(Test Circuit 2)
Test Condition
0
o
C < T
A
< 70
o
C
T
A
=25
o
C, I
REF
= 10mA
Reference Voltage
(Test Circuit 1)
T
A
=25
o
C, I
REF
= 10mA
T
A
=25
o
C, I
REF
= 10mA
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Electrical Specifications
TA = 25
0
C, I
REF
=10mA unless otherwise specified
Test Circuit 1
Test Circuit 2
Test Circuit 3
V
IN
V
KA
= V
REF
I
KA
=10mA
V
IN
V
KA
I
K(OFF)
V
IN
V
KA
I
K
R1
R2
I
REF
V
REF
AME, Inc.
5
AME4311
Low Voltage Shunt Regulator
Dynamic Impedance vs. Temperature
Reference Voltage vs. Temperature
-45
-5
25
55
85
0.15
0.17
0.19
0.21
0.23
0.25
0.27
0.29
0.31
0.33
0.35
Dynami
c

Impe
d
a
n
ce 0.1-15mA (ohm)
Temperature (
o
C)
R
e
f
e
r
e
n
ce Vo
l
t
ag
e @ 10m
A
(
V
)
Temperature (
o
C)
1.222
1.224
1.226
1.228
1.230
1.232
1.234
-45
-5
25
55
85
Reference Input Current vs. Temperature
0.00
0.02
0.04
0.06
0.08
0.10
0.12
0.14
Ref
erence
I
nput
Current
(
u
A
)
Temperature (
o
C)
-45
-5
25
55
85
Line Transient Response, IK=10mA
Frequency=100KHz
1V /
DI
V
CH1
1.00V
CH2
M1.00
S
800mV
1.00V
CH1
V
OUT
V
IN
High Current Operating Characteristics
Low Current Operating Characteristics
I
K
-
Ca
th
o
d
e Cu
rren
t
(mA)
V
KA
- Cathode Voltage (V)
-30
-20
-10
0
10
20
30
40
50
-1.0
-0.5
0
0.5
1.0
1.5
T=25
O
C
I
K
- Cathod
e

Curre
n
t
(



A)
V
KA
- Cathode Voltage (V)
-150
0
150
300
450
600
750
900
1050
-1.0
-0.5
0
0.5
1.0
1.5