ChipFind - документация

Электронный компонент: AME431BBJETA12

Скачать:  PDF   ZIP
AME, Inc.
1
AME431B
Adjustable Precision Shunt Regulator
n
Functional Block Diagram
l
Very accurate reference voltage : 0.15% typical
l
High stability under capacitive load
l
Low temperature deviation: 4.5mV typical
l
Low equivalent full-range temperature coefficient
with 20PPM/
o
C typical
l
Low dynamic output resistance: 0.2
typical
l
Sink current capacity from 1mA to 100mA
l
Low output noise
l
Available in 5 packages: TO-92, SOT-23-3,
SOT-89, SO-8 and SOT-25
The AME431B series ICs are 3-terminal adjustable
shunt regulator with guaranteed temperature stability over
a full operation range. These ICs feature sharp turn-on
characteristics, low temperature coefficient and low out-
put impendance, which make them ideal substitutes for
Zener diodes in applications such as switching power
supply, charger and other adjustable regulators.
The reference is set to 1.24V for AME431Bxxxxx12 and
2.5V for AME431Bxxxxx25. The output voltage can be
set to 1.24V to 16V for V
REF
=1.24V part type and 2.5 to
36V for V
REF
=2.5V part type with two external resistors.
The AME431B precision reference is offered in two ref-
erence tolerance: 0.5% and 1.0%
The 5 main packages have low thermal impendance
which allows operation over a wide range of -40
o
C t o
+125
o
C.
l
Adjustable power supplies
l
Linear regulators
l
Battery operated computer
l
Portable electronics
l
Instrumentation
l
Switching power supply
l
Mother board
l
LCD monitor
l
Note book computer
n
General Description
n
Features
n
Applications
V+ (Cathode)
GND (Anode)
REF
V
REF
AME, Inc.
2
Adjustable Precision Shunt Regulator
AME431B
n
Typical Applications
Shunt Regulator
High Current Shunt Regulator
Current Source or Current Limit
AME431B
R1
R2
V
O
=(1+R1/R2) V
REF
V
REF
R3
V
IN
V
OUT
AME431B
R2
R3
V
O
=(1+R2/R3) V
REF
V
REF
R1
V
IN
V
OUT
R4
AME431B
R2
I
OUT
=V
REF
/R2+I
KA
R1
V
IN
I
OUT
AME, Inc.
3
AME431B
Adjustable Precision Shunt Regulator
n
Typical Applications (contd.)
Precision 5V 1.5A Regulator
Precision 5V 1.5A Regulator
R1
8.2K
V
OUT
R2
250
AME431B
R3
250
Adjust
AME1117
V
IN
5V, 1.5A
AME431B
R1
Q1
R3
V
OUT
R6
R5
C2
R4
COMP
PWM
Controller
VFB
C1
4
3
2
R2
680
U2
PS521
AME, Inc.
4
Adjustable Precision Shunt Regulator
AME431B
n
Pin Configuration
SOT-23
Top View
AME431BAJETXXXX
1. Cathode
2. REF
3. Anode
SOT-23
Top View
AME431BBJETXXXX
1. REF
2. Cathode
3. Anode
SOT-89
Front View
TO-92-3
Bottom View
AME431BAJFTXXXX
1. REF
2. Anode
3. Cathode
AME431BAJATXXXX
1. REF
2. Anode
3. Cathode
1
2
3
SO-8
Top View
AME431BAJHAXXXX
1. Cathode
2. Anode
3. Anode
4. NC
5. NC
6. Anode
7. Anode
8. REF
1
3
2
AME431B
1
2
3
AME431B
1
2
3
AME431B
1
3
2
4
AME431B
5
6
7
8
1
3
2
5
4
AME431B
SOT-25
Top View
AME431BAJEVXXXX
1. NC
2. NC
3. Cathode
4. REF
5. Andode
AME, Inc.
5
AME431B
Adjustable Precision Shunt Regulator
n
Ordering Information
A
1. Cathode
J: -40
O
C to 125
O
C
A: TO-92
A: 8
A: 0.5%
12: 1.24V
L: Low profile
(SOT-23)
2. REF
E: SOT-2X
T: 3
B: 1.0%
25: 2.5V
Y: Lead free &
3. Anode
F: SOT-89
V: 5
Low profile
H: SO-8
Z: Lead free
B
1. REF
(SOT-23)
2. Cathode
3. Anode
A
1. REF
(SOT-89)
2. Anode
3. Cathode
A
1. REF
(TO-92-3)
2. Anode
3. Cathode
A
1. Cathode
(SO-8)
2. Anode
3. Anode
4. NC
5. NC
6. Anode
7. Anode
8. REF
A
1. NC
(SOT-25)
2. NC
3. Cathode
4. REF
5. Anode
Accuracy
Special Feature
Pin
Configuration
Reference
Voltage
Operating
Temperature
Range
Package Type
Number
of
Pins
Operating Temperature Range
Number of Pins
Package Type
Pin Configuration
Special Feature
431B x x x
x
x
x x
Reference Voltage
Accuracy