Power AP431AT-A Adjustable precision shunt regulator Datasheet

Advanced Power
Electronics Corp.
AP431A
ADJUSTABLE PRECISION SHUNT
REGULATOR
Features
•
•
•
•
•
•
•
•
•
•
Description
Precision reference voltage
AP431A : 2.495V ± 0.5%
Sink current capability: 200mA
Minimum cathode current for regulation: 300μA
o
Equivalent full-range temp coefficient: 30 ppm/ C
Fast turn-on response
Low dynamic output impedance: 0.2Ω
Programmable output voltage to 36V
Low output noise.
Packages: TO-92,SOT-23, SOT-25 and SOP-8
SOT-89
RoHS Compliant & Halogen Free Product
The AP431A are 3-terminal adjustable precision
shunt regulators with guaranteed temperature
stability over the applicable extended commercial
temperature range. The output voltage may be set at
any level greater than 2.495V(VREF) up to 36V merely
by selecting two external resistors that act as a
voltage divider network. These devices have a
typical output impedance of 0.2Ω. Active output
circuitry provides very sharp turn-on characteristics,
making
these
devices
excellent
improved
replacements for Zener diodes in many applications.
The precise (+/-) 1% Reference voltage tolerance of
the AP431A make it possible in many applications to
avoid the use of a variable resistor, consequently
saving cost and eliminating drift and reliability
problems associated with it.
Ordering Information
A
P
4
3
1
A
X
Package
-
X
Reference Voltage
Tolerance :
A : +/- 0.5%
B : +/- 1%
T : TO-92
N/NR : SOT-23
Y : SOT-25
M : SOP-8
G: SOT-89
Typical Application Circuit
VIN
VOUT
+
R1
Cin
+
Cout
AP431A
AP431
R2
VOUT = (1+R1/R2)VREF
Precision Regulator
www.a-power.com.tw
1
20130401V6.2
Advanced Power
Electronics Corp.
AP431A
Symbol
Block Diagram
Cathode (C)
REF (R)
+
Cathode (C)
VREF
REF (R)
Anode (A)
Anode (A)
Pin Configuration
Order Number
Pin Configuration ( Top View )
3
AP431AT
( TO-92 )
Rthja=160oC/W
Cathode
2
Anode
1
REF
AP431AN
( SOT-23 )
Pin Configuration ( Top View )
Cathode
Cathode
2
Anode
3
1
Rthja=500oC/W
Rthjl=60oC/W
REF
Rthjc=180oC/W
Cathode
AP431AM
( SO-8 )
8
REF
7
Anode
3
6
Anode
4
5
NC
1
Anode
2
Anode
NC
Rthja=208oC/W
Rthjc=50oC/W
AP431AY
( SOT-23-5L )
NC
1
NC
2
Cathode
o
Rthja=500 C/W
5
Anode
4
REF
1
3
Rthjc=180oC/W
3
AP431AG
( SOT-89 )
Rthja=250oC/W
Cathode
Anode
2
1
REF
AP431AY5
( SOT-23-5L )
REF
1
Anode
12
Cathode
3
5
NC
4
NC
Rthja=500oC/W
2
o
Rthjc=180oC/W
Rthjc=110 C/W
AP431ANR
( SOT-23 )
Order Number
2
Anode
REF
3
1
Cathode
Rthja=500oC/W
Rthjc=180oC/W
www.a-power.com.tw
2
Advanced Power
Electronics Corp.
AP431A
Absolute Maximum Ratings
Cathode Voltage ………………………………......….........................…...……………………………...……….36V
Continuous Cathode Current ………………………….…….............…................…………….... -10mA ~ 250mA
Reference Input Current Range ……………..………..............…….................................………….…....... 10mA
o
o
Operating Temperature Range ………….…………..…….…….....………………...........………......-40 C ~ 85 C
o
Lead Temperature………………………….………….…….…………....…………………….........…............ 260 C
o
o
Storage Temperature ……………………………......…....….............………………..……...…....... -65 C ~ 150 C
Power Dissipation (Notes 1. 2)
TO-92 Package ….…………..………………………....………….....… 0.78W
SOT-23 Package .…...…………..…………….......…………………… 0.25W
SOT-25 Package……………………...…………….………….………..0.25W
SOP-8 Package……………….………………………………………… 0.6W
o
SOP-89 Package............................................................................... 0.5W
Note 1: TJ, max =150 C
o
Note 2: Ratings apply to ambient temperature at 25 C
Electrical Characteristics (Ta=25oC , unless otherwise specified.)
PARAMETER
TEST CONDITIONS
VKA = VREF,
-B
Reference voltage
I KA = 10mA (Fig.1) -A
Deviation of Reference input voltage VKA = VREF, IKA = 10mA,
over temperature (Note 3)
Ta = Full range (Fig.1)
Ratio of the change in Reference
VKA = 10V
voltage to the change in Cathode
IKA = 10mA (Fig.2) ~VREF
voltage
VKA= 36V ~10V
R1 = 10KΩ,R2 = ∞ IKA= 10mA
Reference input current
(Fig.2)
Deviation of Reference input current R1 = 10KΩ,R2 = ∞ IKA = 10mA
over temperature
Ta = Full range (Fig.2)
Minimum Cathode current for
VKA = VREF (Fig.1)
regulation
Off-state current
VKA = 36V, VREF = 0V (Fig.3)
V KA = VREF
Dynamic output impedance (Note 4)
Frequency ≤ 1KHz (Fig.1)
SYMBOL MIN.
TYP. MAX. UNIT
VREF
2.470 2.495 2.520
2.482
2.507
V
VREF
8.0
mV
∆VREF
-1.4
∆VKA
-1
-2
mV/V
IREF
1.4
3.5
µA
αIREF
0.4
1.2
µA
IKA(MIN)
0.19
0.5
mA
IKA(OFF)
0.1
1.0
µA
Z KA
0.2
0.5
Ω
20
-2.0 mV/V
VMAX
VDEV = VMAX - VMIN
VMIN
TI
www.a-power.com.tw
TEMPERATURE
T2
3
Advanced Power
Electronics Corp.
AP431A
Note 3. Deviation of reference input voltage, VDEV, is defined as the maximum variation of the reference over
the full temperature range.
The average temperature coefficient of the reference input voltage αVREF is defined as:
VDEV
) ⋅ 10 6
VREF (25°C)
……………………..……………….. ( ppm
)
=
°C
T2 − T1
(
α VREF
Where:
T2 – T1 = full temperature change.
αVREF can be positive or negative depending on whether the slope is positive or negative.
Note 4. The dynamic output impedance, RZ, is defined as:
Z KA =
∆ VKA
∆ IKA
When the device is programmed with two external resistors R1 and R2 (see Figure 2.), the dynamic output
impedance of the overall circuit, is defined as:
'
Z KA =
Test Circuits
∆v
≈ Z KA
∆i
Input
(1 +
R1
)
R2
IN
VKA
IKA
IKA
VKA
R1
VREF
IN
R2
VKA
IREF
VREF
IZ(OFF)
Note:VKA=VREF(1+R1/R2)+IREF× R1
Fig1. Test Circuit for V KA= VREF
www.a-power.com.tw
Fig2. Test circuit for V KA>VREF
Fig3. Test Circuit for off-state Current
4
Advanced Power
Electronics Corp.
AP431A
Typical Performance Characteristics
Cathode current Vs Cathode Voltage
Cathode current (uA) Vs Cathode Voltage
600
VKA=Vref
Ta=25oC
Cathode current(uA)
Cathode current(mA)
100
0
-100
0.5
-0.5
Cathode Voltage(v)
-1.5
1.5
2500
Reference Voltage(mV)
200
0
-0.5
0
0.5
1.5
1
Cathode Voltage(v)
2
2.5
Reference input current Vs free Temperature
Reference input current (uA)
Reference Voltage Vs Free-Air Temperature
400
-200
-1
2.5
VKA=Vref
Ta=25oC
2495
2490
2485
2480
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80
Free-Air Tempeture (oC)
2
1.8
R1=10K
IKA=10mA
1.6
1.4
1.2
1
-50
-25
0
25
50
75
Free-Air Temperature(oC)
100
125
Change in Reference Voltage (mv)
Change in Reference Voltage vs Cathode Voltage
0
-2
IKA=10mA
Ta=25oC
-4
-6
-8
-10
-12
0
5
www.a-power.com.tw
10
15
20
Cathode Voltage (V)
25
30
5
Advanced Power
Electronics Corp.
AP431A
Typical Performance Characteristics(Continued)
SMALL-SIGNAL VOLTAGE AMPLIFICATION vs. FREQUENCY
IKA=10mA
TA=25oC
50
Output
IKA
15KΩ
40
+
9µF
30
232Ω
+
-
AV-Small Signal Voltage Amplification (dB)
60
-
8.25KΩ
GND
20
TEST CIRCUIT FOR VOLTAGE AMPLIFICATION
10
0
1K
10K
100K
f-Frequency-Hz
1M
10M
REFERENCE IMPEDANCE vs. FREQUENCY
∣ZKA∣—Reference Impedance —Ω
100
IKA=10mA
TA=25oC
1KΩ
Output
I KA
10
50Ω
+
GND
1
TEST CIRCUIT FOR REFERENCE IMPEDANCE
0.1
1K
10K
100K
1M
10M
f-Frequency-Hz
www.a-power.com.tw
6
Advanced Power
Electronics Corp.
AP431A
PULSE RESPONSE
6
TA=25oC
Input
Input and Output Voltage-V
5
220Ω
4
Pulse
Generator
f=100kHz
3
Output
50Ω
Output
GND
2
TEST CIRCUIT FOR PULSE RESPONSE
1
0
-1
0
1
2
3
4
5
6
7
t-Time-µ S
STABILITY BOUNDARY CONDITIONS †
100
90
IKA-Cathode Current-mA
80
150Ω
TA=25 oC
A VKA=Vref
I KA
B VKA=5V
C VKA=10V
D VKA=15V
B
Stable
70
60
-
VBATT
C
Stable
50
CL
+
TEST CIRCUIT FOR CURVE A
A
40
30
D
I KA
20
10
CL
0
0.001
R2
0.01
0.1
1
C L-Load Capacitance-µF
10
The areas under the curves represent conditions that may cause the
device to oscillate. For curves B, C, and D, R2 and V+ were adjusted
to establish the initial V KA and I KA conditions with C L =0.V BATT and
CL were then adjusted to determine the ranges of stability.
www.a-power.com.tw
150Ω
R1=10KΩ
+
-
VBATT
TEST CIRCUIT FOR CURVE B, C, AND D
7
Advanced Power
Electronics Corp.
AP431A
Application Examples
VIN
VIN
RCL
R
R1A
VIN
R1B
ON
R2A
R2B
+
OFF
LED on when Low Limit<VIN<High Limit
Low Limit ≈ VREF (1+R1B/R2B)
High Limit ≈ VREF (1+R1A/R2A)
V IN
Delay = RC x ln(
)
VIN -VREF
Fig.5 Delay Timer
Fig.4 Voltage Monitor
VIN
IOUT
IOUT
VIN
IOUT = VREF / RCL
Fig.6 Current Limiter or Current Source
VOUT
VIN
R1
R1
R2
R2
RS
LIMIT
VOUT = (1 + R1/R2) x VREF
IOUT = VREF / RS
Fig.7 Constant-Current Sink
VOUT
PUSE
Fig.8 Higher-Current Shunt Regulator
(1 + R1/R2) x VREF
Fig.9 Crow Bar
VIN
R1A
R1B
+
R2A
Low Limit
High Limit
R2B
Output ON when
Low Limint < VIN< High Limit
VBE
VREF (1 + R1B/R2B) +VBE
VREF(1 + R1A/R2A)
Fig.10 Over-Voltage / Under-Voltage Protection Circuit
www.a-power.com.tw
8
Advanced Power
Electronics Corp.
AP431A
MARKING INFORMATION
SO-8
Part Number
Package Code
431AM
YWWSSS
Date Code (YWWSSS)
Y:Last Digit Of The Year
WW:Week
SSS:Sequence
SOT-23-5L
R6&XX
Part Number :
AP431AY : R6
AP431AY5 : R65
ID Code : Internal
SOT-23
R6&XX
Part Number :
AP431AN : R6
AP431ANR : R6R
ID Code : Internal
SOT-89
Part Number
431A
YWWS
Date Code (YWWS)
Y:Year
WW:Week
S:Sequence
9
Advanced Power
Electronics Corp.
AP431A
MARKING INFORMATION
TO-92
Part Number
431A
YWWS
Date Code (YWWS)
Y:Year
WW:Week
S:Sequence
10
Similar pages