MICROSEMI TL431CLP

TL431 / TL431A / TL431B
®
TM
Precision programmable References
P RODUCTION D ATA S HEET
ƒ INITIAL VOLTAGE REFERENCE
ACCURACY OF 0.4% (TL431B)
ƒ SINK CURRENT CAPABILITY 1mA
to 100mA
ƒ TYPICAL OUTPUT DYNAMIC
IMPEDANCE LESS THAN 200mΩ;
TYPICAL OUTPUT IMPEDANCE OF
THE TL431B LESS THAN 100mΩ
ƒ ADJUSTABLE OUTPUT VOLTAGE
FROM 2.5V TO 36V
ƒ AVAILABLE IN SURFACE-MOUNT
PACKAGES
ƒ LOW OUTPUT NOISE
ƒ TYPICAL EQUIVALENT FULL
RANGE TEMPERATURE
COEFFICIENT OF 30ppm/°C
ƒ DIRECT PIN-TO-PIN
REPLACEMENT FOR INDUSTRY
STANDARD TL431 AND TL1431
SI
GN
S
regulation.
The
typical
output
impedance of these devices is 200mΩ.
These devices find application in the
feedback path of switching power
supplies, OVP crowbar circuits,
reference for A/D, D/A, and as zener
diodes
with
improved
turn-on
characteristics.
FO O
R DU
NE C
W T
DE
The TL431/TL431A/TL431B series
precision adjustable three terminal
shunt voltage regulators are pin-to-pin
compatible with the industry standard
TL431. The output voltage of this
reference is programmable by using
two external resistors from 2.5V to
36V. These devices offer low output
impedance
for
improved
load
PR
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
WWW . Microsemi .C OM
KEY FEATURES
DESCRIPTION
PRODUCT HIGHLIGHT
Precision Programmable References
EC S
OM OL
ME ET
ND E
ED
VIN
VOUT
R1
TL431/A
& TL431B
-40 to 85
2%
1%
0.4%
2%
1%
0.4%
⎛
⎝
VO = ⎜ 1+
R1 ⎞
⎟ •VREF
R2 ⎠
PACKAGE ORDER INFO
DM
Plastic SOIC
8-Pin
LP
Plastic TO-92
3-Pin
PK
Plastic TO-89
3 - Pin
RoHS Compliant / Pb-free
Transition DC: 0440
RoHS Compliant / Pb-free
Transition DC: 0509
RoHS Compliant / Pb-free
Transition DC: 0518
TL431CDM
TL431ACDM
TL431BCDM
TL431IDM
TL431AIDM
TL431BIDM
TL431CLP
TL431ACLP
TL431BCLP
TL431ILP
TL431AILP
TL431BILP
TL431CPK
TL431ACPK
TL431BCPK
TL431IPK
TL431AIPK
TL461BIPK
TL431X
0 to 70
Initial
Tolerance
NO
TA (°C)
T
O
R B
R2
Note: All surface mount packages are available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LTL431AIDM-TR). The
TO-92 (LP) package is available in ammo-pack.
Copyright © 1999
Rev. 1.4, 2006-09-26
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
TL431 / TL431A / TL431B
®
TM
Precision programmable References
P RODUCTION D ATA S HEET
PACKAGE PIN OUT
DM
Plastic SOIC 8-Pin
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
PK
Plastic TO-89 3-Pin
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
LP
EC S
OM OL
ME ET
ND E
ED
Plastic TO-92 3-Pin
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
(Top View)
Cathode
1
8
Ref
N.C.
2
7
Anode
Anode
3
6
Anode
N.C.
4
5
N.C.
DM PACKAGE
(Top View)
165°C/W
PR
THERMAL DATA
1. Ref
LP PACKAGE
FO O
R DU
NE C
W T
DE
Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to
Ground. Currents are positive into, negative out of specified terminal.
Note 2. Voltage values are with respect to the anode terminal unless otherwise noted.
3. Cathode
2. Anode
WWW . Microsemi .C OM
Cathode to Anode Voltage (VKA)(Note 2) ....................................................... -0.3 to 37V
Reference Input Current (IREF).................................................................. -50µA to 10mA
Continuous Cathode Current (IK) .......................................................... -100mA to 150mA
Operating Junction Temperature................................................................................ 150°C
Storage Temperature Range.........................................................................-65°C to 150°C
Package Peak Temp. for Solder Reflow (40 seconds maximum exposure) ... 260°C (+0 -5)
SI
GN
S
ABSOLUTE MAXIMUM RATINGS
3
Cathode
2
Anode
1
Ref
71°C/W
156°C/W
PK PACKAGE
(Top View)
RoHS / Pb-free 100% Matte Tin Lead Finish
Junction Temperature Calculation: TJ = TA + (PD x θJA).
The θJA numbers are guidelines for the thermal performance of the device/pc-board system. All of the
above assume no ambient airflow.
BLOCK DIAGRAM
NO
PACKAGE DATA
T
Ref (R)
O
R B
Cathode (K)
VREF
Anode (A)
Copyright © 1999
Rev. 1.4, 2006-09-26
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2
TL431 / TL431A / TL431B
®
TM
Precision programmable References
P RODUCTION D ATA S HEET
ΔVREF
ΔVKA
IREF
IMIN
IOFF
I ZKA I
Dynamic Impedance
TL431B
IK = 10mA, VKA = VREF, TA = 25°C
IK = 10mA, VKA = VREF, TA = 25°C
IK = 10mA, VKA = VREF, TA = 25°C
IK = 10mA, VKA = VREF
IK = 10mA, VKA = VREF
IK = 10mA, VKA = VREF
IK = 10mA, VKA = VREF
IK = 10mA, VKA = VREF
IK = 10mA, VKA = VREF
Min
2440
2470
2490
2495
2495
2500
4
5
4
5
4
5
2550
2520
2510
17
30
17
30
15
20
IK = 10mA, VKA = 2.5V to 36V
-1.4
-2.7
IK = 10mA, VKA = 2.5V to 36V
-1.1
-2.0
2
4
1.5
0.4
0.1
0.1
0.18
1.9
1
1
1
2
0.5
0.2
0.5
0.1
0.2
VKA = VREF, TA = 25°C
VKA = VREF, TA = 25°C
VKA = VREF to 36V
VKA = VREF to 36V, TA= 25°C
VKA = VREF to 36V, TA= 25°C
VKA = VREF to 36V, TA= Operating Range
VKA = 36V, VREF = 0V, TA= 25°C
VKA = VREF, IK = 1mA to 100mA, f < 1kHz,
TA = 25°C
VKA = VREF, IK = 1mA to 100mA, f < 1kHz,
TA = 25°C
EC S
OM OL
ME ET
ND E
ED
TL431
VREF
TL431/A/B
Typ
Max
SI
GN
S
TL431
TL431A
TL431B
TL431C
TL431I
TL431AC
Reference Drift
TL431AI
TL431BC
TL431BI
TL431,
Voltage Ratio, Ref to
TL431A
Cathode (Note 4)
TL431B
TL431,
Reference Input
TL431A
Current
TL431B
Minimum Operating Current
TL431
TL431A
Off-State Cathode
Current
TL431B
Reference Input
Voltage
Test Conditions
FO O
R DU
NE C
W T
DE
Symbol
PR
Parameter
Units
mV
mV
WWW . Microsemi .C OM
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, these specifications apply over the operating ambient temperature for the TL431C/TL431AC/TL431BC with
0°C < TA < 70°C, and TL431I/TL431AI/TL431BI with -40°C < TA < 85°C
mV/V
µA
mA
µA
Ω
Note 3: These parameters are guaranteed by design.
Note 4:
ΔVREF
Ratio of change in reference input voltage to the change in cathode voltage.
Copyright © 1999
Rev. 1.4, 2006-09-26
ELECTRICALS
NO
T
O
R B
ΔVKA
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
TL431 / TL431A / TL431B
®
TM
Precision programmable References
P RODUCTION D ATA S HEET
GRAPH / CURVE INDEX
FIGURE INDEX
SI
GN
S
Parameter Measurement Information
Figure #
8. Test Circuit For VKA = VREF
9. Test Circuit For VKA > VREF
10. Test Circuit for IOFF
FO O
R DU
NE C
W T
DE
Typical Characteristics
Figure #
11. Equivalent Input Noise Voltage Over a 10-Second Period
12. Small-Signal Voltage Amplification vs. Frequency
13. Reference Impedance vs. Frequency
14. Pulse Response
15. Stability Boundary Conditions
WWW . Microsemi .C OM
Characteristic Curves
Figure #
1. Reference Input Voltage vs. Free-Air Temperature
2. Reference INput Current vs. Free-Air Temperature
3. Cathode Current vs. Cathode Voltage
4. Cathode Current vs. Cathode Voltage
5. Off-State Cathode Current vs. Free-Air Temperature
6. Ratio of Delta Reference Voltage to Delta Cathode
Voltage vs. Free-Air Temperature
7. Equivalent Input Noise Voltage vs. Frequency
Copyright © 1999
Rev. 1.4, 2006-09-26
CHARTS
NO
T
O
R B
EC S
OM OL
ME ET
ND E
ED
PR
Application Information
Figure #
16. Shunt Regulator
17. Single-Supply Comparator with TemperatureCompensated Threshold
18. High Current Shunt Regulator
19. Crowbar Circuit
20. Voltage Monitor
21. Precision Constant-Current Sink
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
TL431 / TL431A / TL431B
®
TM
Precision programmable References
P RODUCTION D ATA S HEET
CHARACTERISTIC CURVES
2.60
TL431/A
2.54
2.52
TL431B
2.50
2.48
VREF= 2495mV
TL431/A
2.46
2.44
VREF= 2440mV
TL431/A
2.4
-50
-25
0
25
50
75
100
3
TL431/A
2
TL431B
1
PR
2.42
4
(TA ) Ambient Temperature - (°C)
Figure 1 – Reference Voltage vs. Free-Air Temperature
125
SI
GN
S
VREF= 2550mV
2.56
IK = 10mA
R1 =
IK = 10mA
FO O
R DU
NE C
W T
DE
(VREF) Reference Input Voltage - (V)
(IREF) Reference Input Current - (µA)
VREF= V KA
IK = 10mA
2.58
WWW . Microsemi .C OM
5
0
-50
-25
0
25
50
75
100
125
(TA ) Ambient Temperature - (°C)
150
VKA = V REF
TA = 25 °C
100
75
O
R B
50
25
0
TL431/A
-25
TL431B
-50
800
VKA = V REF
TA = 25 °C
600
IMIN
400
200
0
T
(IK) Cathode Current - (µA)
125
(IK) Cathode Current - (µA)
EC S
OM OL
ME ET
ND E
ED
Figure 2 – Reference Current vs. Free-Air Temperature
-100
-1
0
1
-200
23
-1
(VKA ) Cathode Voltage - (V)
Figure 3 – Cathode Current vs. Cathode Voltage
Copyright © 1999
Rev. 1.4, 2006-09-26
0
1
CHARTS
-2
NO
-75
23
(VKA ) Cathode Voltage - (V)
Figure 4 – Cathode Current vs. Cathode Voltage
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
TL431 / TL431A / TL431B
®
TM
Precision programmable References
P RODUCTION D ATA S HEET
CHARACTERISTIC CURVES
TL431/A
& TL431B
VKA = 3V to 36V
-0.95
1
SI
GN
S
1.5
-1.05
FO O
R DU
NE C
W T
DE
VKA - (mV/V)
2
VREF /
(IOFF) Off-State Cathode Current - (µA)
VKA = 36V
VREF= 0
WWW . Microsemi .C OM
-0.85
2.5
-1.15
-1.25
-1.35
0.5
-25
0
25
50
75
100
PR
-1.45
0
-50
125
-50
-25
0
25
50
75
100
125
(TA ) Ambient Temperature - (°C)
Figure 6 – Ratio of Delta Reference Voltage to Delta Cathode
Voltage vs. Free-Air Temperature
Figure 5 – Off-State Cathode Current vs Free-Air Temperature
EC S
OM OL
ME ET
ND E
ED
(TA ) Ambient Temperature - (°C)
260
IO = 10mA
TA = 25 °C
220
O
R B
200
180
160
140
T
120
100
100
1k
10k
100k
CHARTS
10
NO
(VN) Noise Voltage - (nV/ Hz)
240
(f) Frequency - (Hz)
Figure 7 – Equivalent Input Noise Voltage vs. Frequency
Copyright © 1999
Rev. 1.4, 2006-09-26
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 6
TL431 / TL431A / TL431B
®
TM
Precision programmable References
P RODUCTION D ATA S HEET
PARAMETER MEASUREMENT INFORMATION
VKA
Input
IK
R1
FO O
R DU
NE C
W T
DE
IREF
R2
VREF
Figure 8 – Test Circuit for VKA = VREF
PR
EC S
OM OL
ME ET
ND E
ED
IOFF
VREF
Figure 9 – Test Circuit for VKA > VREF
VKA
Input
SI
GN
S
IK
WWW . Microsemi .C OM
VKA
Input
NO
APPLICATIONS
T
O
R B
Figure 10 – Test Circuit for IOFF
Copyright © 1999
Rev. 1.4, 2006-09-26
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 7
TL431 / TL431A / TL431B
®
TM
Precision programmable References
P RODUCTION D ATA S HEET
TYPICAL CHARACTERISTICS
WWW . Microsemi .C OM
f = 0.1 to 10Hz
IK = 10mA
TA = 25 °C
4
3
1
0
-1
-2
-3
-4
-5
-6
2
4
10
68
EC S
OM OL
ME ET
ND E
ED
0
FO O
R DU
NE C
W T
DE
2
PR
(VN) Input Noise Voltage - (µV)
5
SI
GN
S
6
(t) Time - (s)
Figure 11 – Equivalent Input Noise Voltage over a 10 – Second Period
19.1V
500µF
910
O
R B
1k
2000 µF
TL431/A
& TL431B (DUT)
VCC
VCC
1µF
TLE2027
A V = 10V/mV
820
T
1µF
160K
NO
2.2µF
16k
APPLICATIONS
16
TLE2027
16k
33k
A V = 2V/V
1M
CRO
33k
0.1µF
VEE
VEE
Test Circuit for 0.1Hz to 10Hz Equivalent Input Noise Voltage
Copyright © 1999
Rev. 1.4, 2006-09-26
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 8
TL431 / TL431A / TL431B
®
TM
Precision programmable References
P RODUCTION D ATA S HEET
TYPICAL CHARACTERISTICS
50
IK
15k
9µF
30
20
230
FO O
R DU
NE C
W T
DE
40
8.25k
10
0
-10
10k
1k
1M
100k
10M
(f) Fre quency - (Hz)
EC S
OM OL
ME ET
ND E
ED
Figure 12 – Reference Impedance vs. Frequency
100
IK = 1mA to 100mA
TA = 25 °C
O
R B
10
1
GND
Test Circuit for Voltage Amplification
Output
1k
IK
50
0.1
10k
100k
GND
1M
10M
CHARTS
1k
NO
T
(IzKAI) Reference Impedance
SI
GN
S
Output
PR
(AY) Voltage Amplification - (dB)
IK = 10mA
TA = 25 °C
60
WWW . Microsemi .C OM
70
Test Circuit for Reference Impedance
(f) Frequency - (Hz)
Figure 13 – Reference Impedance vs. Frequency
Copyright © 1999
Rev. 1.4, 2006-09-26
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 9
TL431 / TL431A / TL431B
®
TM
Precision programmable References
P RODUCTION D ATA S HEET
TYPICAL CHARACTERISTICS
5
220
3
Pulse
Generator
f = 100kHz
1
0
3
2
1
0
13
05
2
4
6
(t) Time - (µs)
A V KA = V REF
B V KA = 5V
C V KA = 10V
D V KA = 15V
90
80
B*
O
R B
10
T
40
30
150
CL
R2
C*
20
50
NO
0.1
150
IK
1
10
CL
CHARTS
0.01
VBATT
Test Circuit for Curve A
D*
0
0.001
IK
R1=10k
Stable
Stable
A*
GND
Test Circuit for Pulse Response
IK = 10mA
TA = 25 °C
70
60
EC S
OM OL
ME ET
ND E
ED
Figure 14 – Pulse Response
100
50
PR
(VKA)
Output Voltage - (V)
FO O
R DU
NE C
W T
DE
2
(IK) Cathode Current - mA
Ou tput
SI
GN
S
VIN - (V)
4
VBATT
(CL) Load Capacitance - (µF)
Figure 15 – Stability Boundary Conditions
*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 VKA and IK conditions with CL = 0. VBATT and CL were then adjusted to
determine the ranges of stability.
Test Circuit for Curve B, C, D
Copyright © 1999
Rev. 1.4, 2006-09-26
WWW . Microsemi .C OM
6
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 10
TL431 / TL431A / TL431B
®
TM
Precision programmable References
P RODUCTION D ATA S HEET
APPLICATION INFORMATION
R (see Note)
VBATT
VO
IK
TL431/A
& TL431B
TL431/A
& TL431B
VREF
R2 0.1%
Input
R1 ⎞
⎟ • VREF
R2 ⎠
Figure 16 – Shunt Regulator
Note: R should provide > 1mA cathode current to the TL431/A & TL1431 at
minimum VBATT
VO
EC S
OM OL
ME ET
ND E
ED
R1
TL431/A
& TL431B
R2
⎛
⎝
VO = ⎜ 1 +
R1 ⎞
⎟ • VREF
R2 ⎠
Figure 18 – High Current Shunt Regulator
VO
VON 2V
VOFF VBATT
GND
Figure 17 – Single-Supply Comparator with TemperatureCompensated Threshold
PR
VBATT
FO O
R DU
NE C
W T
DE
⎛
⎝
VBATT
VO
R1
TL431/A
& TL431B
C
(see Note)
R2
Figure 19 – Crowbar Circuit
Note: Refer to the stability boundary conditions in Figure 15 to determine
allowable values for C.
R3 (see Note)
R1A
TL431/A
& TL431B
O
R B
12V
R4
(Note)
VBATT
IO
TL431/A
& TL431B
R2B
NO
RS
0.1%
⎛ R1B ⎞
Low Limit = ⎜ 1 +
⎟ • VREF
⎝ R2B ⎠
⎛
⎝
High Limit = ⎜ 1 +
APPLICATIONS
T
R2A
SI
GN
S
R1 0.1%
VO = ⎜ 1 +
WWW . Microsemi .C OM
VBATT
R1B ⎞
⎟ • VREF
R2B ⎠
LED on when Low Limit < VBATT < High Limit
Figure 20 – Voltage Monitor
Figure 21 – Precision Contact – Current Sink
Note: R3 and R4 are selected to provide the desired LED intensity and > 1mA
cathode current to the TL431/A & TL431B at the available V+
Copyright © 1999
Rev. 1.4, 2006-09-26
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 11