SIPEX SPX431LAM1

SPX431L
®
Precision Adjustable Shunt Regulator
FEATURES
■ Tight Voltage Tolerance 0.5% at 10mA
■ Wide Operating Current 1mA to 100mA
■ Extended Temperature Range:
0°C to 105°C
■ Low Temperature Coefficient 30 ppm/°C
■ Improved Replacement in Performance for
TL431 and AS431
■ Low Cost Solution
APPLICATIONS
■ Battery Operating Equipment
■ Adjustable Supplies
■ Switching Power Supplies
ANODE
SPX431L
3 Pin SOT-23
1
REF
CATHODE
Now Available in Lead Free Packaging
■
■
■
■
Error Amplifiers
Single Supply Amplifier
Monitors / VCRs / TVs
Personal Computers
DESCRIPTION
The SPX431L is a 3-terminal adjustable shunt voltage regulator providing a highly accurate
bandgap reference. The SPX431L acts as an open-loop error amplifier with a 2.5V temperature
compensation reference. The SPX431L’s thermal stability, wide operating current (100mA) and
temperature range (0°C to 105°C) makes it suitable for a variety of applications that require a
low cost, high performance solution. SPX431L tolerance of 0.5% is proven to be sufficient to
overcome all of the other errors in the system to virtually eliminate the need for trimming in the
power supply manufacturer's assembly line and contribute a significant cost savings.
The output voltage may be adjusted to any value between VREF and 20V with two external
resistors. The SPX431L is available in TO-92, SOIC-8, SOT-89, and SOT-23-3 packages.
BLOCK DIAGRAM
Cathode (K)
Reference
(R)
+
2.5V
Anode (A)
Date: 5/25/04
SPX431L Precision Adjustable Shunt Regulator
1
© Copyright 2004 Sipex Corporation5
ABSOLUTE MAXIMUM RATINGS
Junction Temperature TJ ........................................................... 150 °C
Storage Temperature TSTG .............................................. -65 to 150 °C
Lead Temperature (Soldering 10 sec.) TL .................................. 300°C
Cathode-Anode Reverse Breakdown VKA ....................................... 20V
Anode-Cathode Forward Current, (<10ms) IAK ................................. 1A
Operating Cathode Current IKA .................................................. 100mA
Reference Input Current IREF ........................................................ 10mA
Continuos Power Dissipation at 25°C PD
TO-92 ..................................................................... 775mW
SOT-23 .................................................................. 200 mW
SOIC-8 .................................................................... 750mW
SOT-89 ................................................................. 1000mW
NOTE: Stresses greater than those listed under ABSOLUTE MAXIMUM
RATINGS may cause permanent damage to the device. This is a stress
rating only and functional operation of the device at these or any other
conditions above those indicated in the operational sections of this
specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.
RECOMMENDED CONDITIONS
PARAMETER
TYPICAL THERMAL RESISTANCES
SYMBOL
RATING
UNIT
Cathode Voltage
VKA
VREF to 20
V
Cathode Current
IK
10
mA
PACKAGE
0JA
0JC
TYPICAL DERATING
TO-92
160°C/W 80°C/W
6.3 mW/°C
SOT-23
575°C/W 150°C/W
1.7 mW/°C
SOIC-8
175°C/W 45°C/W
5.7 mW/°C
SOT-89
110°C/W
9.1 mW/°C
8°C/W
Typical deratings of the thermal resistances are given for ambient
temperature >25°.
ELECTRICAL CHARACTERISTICS
Electrical characteristics at 25°C IK = 10mA VK = VREF, unless otherwise specified.
PARAMETER
SYMBOL
FIGURE
CONDITIONS
MIN
TYP
MAX
UNITS
2.490
2.503
2.515
V
0.07
0.20
mV/°C
-1.0
-0.4
0.3
0.7
4.0
0.4
1.2
µA
0.4
1.0
mA
SPX431LA
Reference Voltage
∆VREF withTemp.*
Ratio of Change in VREF
to Cathode Voltage
Reference Input Current
VREF
2
TC
2
∆ VREF
∆VK
3
VREF to 10V
10V to 20V
-2.7
-2.0
mV/V
IREF
3
IREF Temp Deviation
∆IREF
3
Min IK for Regulation
IK(MIN)
2
Off State Leakage
IK(OFF)
4
VREF = 0V, VKA = 20V
0.04
1.0
µA
ZKA
2
ƒz ≤ 1kHz
IK = 1 to 100mA
0.15
0.5
Ω
VREF
2
2.495
2.520
V
0.07
0.20
mV/°C
-1.0
-0.4
0.3
Dynamic Output
Impedance
TJ = 0°C to 105°C
µA
SPX431L
Reference Voltage
∆VREF withTemp.*
Ratio of Change in VREF
to Cathode Voltage
Reference Input Current
TC
2
∆ VREF
∆VK
3
IREF
3
∆IREF
3
Min IK for Regulation
IK(MIN)
2
Off State Leakage
IK(OFF)
ZKA
IREF Temp Deviation
Dynamic Output
Impedance
Date: 5/25/04
2.470
VREF to 10V
10V to 20V
-2.7
-2.0
mV/V
0.7
4.0
µA
TJ = 0°C to 105°C
0.4
1.2
µA
0.4
1.0
mA
4
VREF = 0V, VKA = 20V
0.04
1.0
µA
2
ƒz ≤ 1kHz
IK = 1 to 100mA
0.15
0.5
Ω
SPX431L Precision Adjustable Shunt Regulator
2
© Copyright 2004 Sipex Corporation5
ELECTRICAL CHARACTERISTICS
Electrical characteristics at 25°C IK = 10mA VK = VREF, unless otherwise specified.
PARAMETER
SYMBOL
FIGURE
CONDITIONS
MIN
TYP
MAX
UNITS
2.445
2.495
2.545
V
0.07
0.20
mV/°C
-1.0
-0.4
0.3
0.7
4.0
0.4
1.2
µA
0.4
1.0
mA
SPX431LC
Reference Voltage
VREF
2
∆VREF withTemp.*
TC
2
∆ VREF
∆VK
3
Ratio of Change in VREF
to Cathode Voltage
Reference Input Current
VREF to 10V
10V to 20V
-2.7
-2.0
mV/V
IREF
3
IREF Temp Deviation
∆IREF
3
Min IK for Regulation
IK(MIN)
2
Off State Leakage
IK(OFF)
4
VREF = 0V, VKA = 16V
0.04
1.0
µA
2
ƒz ≤ 1kHz
IK = 1 to 100mA
0.15
0.5
Ω
Dynamic Output
ZKA
Impedance
Operating Range (TJ) = 0°C to 105°C.
* See appropiate test circuit (Figure 2)
TJ = 0°C to 105°C
µA
CALCULATING AVERAGE TEMPERATURE COEFFICIENT (TC)
ppm
0
%
mV
0
0
• TC in mV/°C =
∆VREF
∆VREF (mV)
∆TA
∆T
-10
5000
• TC in %/°C =
0.5
0
15
30
45
60
75
90
105
Junction Temperature (°C)
• TC in ppm/°C =
(
∆VREF
∆VREF at 25°C
)
x 100
)
x 106
∆TA
(
∆VREF
∆VREF at 25°C
∆TA
0.07 mV/°C
0.003 %/°C
27 ppm/°C
Figure 1. VREF VS Temperature.
Date: 5/25/04
SPX431L Precision Adjustable Shunt Regulator
3
© Copyright 2004 Sipex Corporation5
TEST CIRCUITS
VIN
VIN
VKA = VREF
VIN
VKA
VKA
IK (OFF)
IREF
R1
IK
IK
IREF
(VREF)
R2
Figure 2. Test Circuit for VKA = VREF
Figure 3. Test Circuit for VKA > VREF
Figure 4. Test Circuit for IKOFF
TYPICAL PERFORMANCE CHARACTERISTICS
150
IK Cathode Current (mA)
100
2.53
VKA = VREF
0°C to 105°C
2.52
VREF Reference Voltage (V)
125
75
50
25
0
-25
-50
-1
0
1
2
VKA Cathode Voltage (V)
2.48
2.47
VKA = VREF
0° to 105°C
600
500
400
105°C
300
25°C
200
-0°C
-30
0
30
60
90
120
Figure 6. Reference Voltage VS Ambient Tempetature
IREF Reference Input Current (µA)
IK Cathode Current (µA)
2.49
TA Ambient Temperature (°C)
900
700
2.50
2.45
-60
3
Figure 5. High Current Operating Characteristics
800
2.51
2.46
-75
-100
-2
VKA = VREF
IK = 10mA
100
0
3.0
2.5
R1 = 10kΩ
R2 = ∞
IK = 10mA
2.0
1.5
1.0
0.5
-100
-200
-1.0
0
1.0
2.0
VKA Cathode Voltage (V)
0
-60
3.0
0
30
60
90
120
TA Ambient Temperature (°C)
Figure 8. Reference Input Current VS Ambient
Temperature.
Figure 7. Low Current Operating Characteristics.
Date: 5/25/04
-30
SPX431L Precision Adjustable Shunt Regulator
4
© Copyright 2004 Sipex Corporation5
TYPICAL PERFORMANCE CHARACTERISTICS
70
0
Noise Voltage nV/Hz
60
-10
∆VREF (mV)
0°C
-20
25°C
75°C
-30
125°C
IKA = 10mA
50
40
30
20
-40
10
-50
0
3
6
9
12 15
18
21
24
VKA = VREF
IK = 10mA
TA = 25°C
0
10
27 30
100
VKA Cathode Voltage (V)
0.150
ZKA Dynamic Impedance (Ω)
10K
100K
Figure 10. Noise Voltage VS Frequency
Figure 9. Reference Voltage Line Regulation VS
Cathode Voltage and TAMBIENT
0.125
1K
f Frecuency (Hz)
REF LEVEL
60.000dB
0.0deg
VKA = VREF
IK = 1 to 100mA
f≤1kHz
/DIV
10.000dB
45.000deg
MARKER 25 297 698.000 Hz
MAG (A/R)
-0.025 dB
MARKER 25 297 698.000 Hz
PHASE (A/R)
93.320 deg
60dB
215°
180°
50dB
PHASE
0.100
0.075
40dB
135°
30dB
90°
20dB
45°
0°
10dB
0.050
GAIN
0.025
0.0
-60
0dB
-45°
-10dB
-90°
-20dB
-135°
-30dB
-30
0
30
60
90
120
-180°
-40dB
10
TA Free Air Temperature
100
1K
START 10.000Hz
10K
100K
1M
10M
-215°
STOP 50 000 000.000Hz
Figure 12. Small Signal Gain and Phase VS Frequency;
IK = 10mA, TA = 25°C
Figure 11. Low Frequency Dynamic Output Impedance
VS TAMBIENT
VOUT
VIN
9µF
15kΩ
IK
230Ω
VOUT
VIN
8.25kΩ
GND
Figure 13. Test Circuit for Gain and Phase Frequency
Response
Date: 5/25/04
Figure 14. FZ = 100kHz, IK = 10mA, TA = 25°C
SPX431L Precision Adjustable Shunt Regulator
5
© Copyright 2004 Sipex Corporation5
TYPICAL PERFORMANCE CHARACTERISTICS
100
VIN
90
250Ω
80
IK Cathode Current (mA)
VOUT
IK
fp = 100kHz
50Ω
A: VKA = VREF
B: VKA= 5V at IK=10mA
C: VKA=10V at IK=10mA
D: VKA=15V at IK=10mA
70
C
60
50
40
STABLE
STABLE
A
30
20
TA = 25°C
10
B
D
0
100
GND
101
102
103
104
105
106
107
CL Load Capacitance (pF)
Figure 16. Stability Boundry Conditions
Figure 15. Test Circuit for Pulse Response
100
ZKA Dynamic Impedance (Ω)
150 Ω
IK
R
CL
10kΩ
TA = 25°C
IK = 1 to 100mA
10
1.0
0.1
0.01
1K
10K
100K
1M
10M
F Frecuency (Hz)
Figure 18. Dynamic Output Impedance TA = 25°C,
IK = 1 to 100mA
Figure 17. Test Circuit for Stability
IKOFF Cathode Current (nA)
100
VIN
R3
VOUT
10
R1
0.1%
VKA = 20V
VREF = 0V
1
VREF
SPX431L
0.1
R2
0.1%
0.01
-50
0
50
100
150
TA Ambient Temperature (°C)
Figure 19. Off State Leakage
Date: 5/25/04
Figure 20. Shunt Regulator VOUT = (1+R1/R2)VREF
SPX431L Precision Adjustable Shunt Regulator
6
© Copyright 2004 Sipex Corporation5
TYPICAL PERFORMANCE CHARACTERISTICS
VIN
VOUT
ISINK
R3
R2
R1
0.1%
Opto Isolator
Q1
R3 sets feedback gain,
C1 provides feedback
compensation
Isolated
Feedback
SPX431L
C1
+
C2
R1
0.1%
SPX431L
R2
0.1%
VOUTRTN
Figure 22. Reference Amplifier for Isolated Feedback in
Off-Line DC-DC Converters
Figure 21. Constant Current Sink, ISINK = VREF/R1
VIN
VIN
VOUT
R5
R1
0.1%
R4
C1
R1
0.1%
R3
R2
0.1%
R3
VOUT
SPX431L
Q1
SPX431L
R2
0.1%
Figure 24. High Current Shunt regulator
VOUT = (1+R1/R2)VREF
Figure 23. Precision High Current Series Regulator
VOUT = (1+R1/R2)VREF
VCC
* Resistor values are chosen such that the effect to
IREF is negligible.
R2
VIN
R1
VOUT
SPX431L
Figure 25. Single Supply Comparator with Temperature
Compensated Threshold. VIN threshold = 2.5V.
Date: 5/25/04
SPX431L Precision Adjustable Shunt Regulator
7
© Copyright 2004 Sipex Corporation5
PINOUTS
8-Pin SOIC (S)
SOT-23-3 (M)
TO-92 (N)
SOT-89 (M1)
3
CATHODE
1
8
REF
ANODE
2
7
ANODE
ANODE
3
6
ANODE
N/C
4
5
N/C
1
ANODE
1
1
2
REF
CATHODE
Top View
REF
3
3
2
CATHODE
REF
ANODE
CATHODE
ANODE
Top View
Top View
2
Bottom View
PACKAGE: 8 PIN NSOIC
D
e
E/2
E1
E
SEE VIEW C
E1/2
1
b
INDEX AREA
(D/2 X E1/2)
Ø1
A
TOP VIEW
Gauge Plane
L2
Seating Plane
Ø1
Ø
L
L1
VIEW C
A2
A
SEATING PLANE
A1
SIDE VIEW
DIMENSIONS
Minimum/Maximum
(mm)
b
WITH PLATING
8 Pin NSOIC
(JEDEC MS-012,
AA - VARIATION)
COMMON HEIGHT DIMENSION
SYMBOL
A
A1
A2
b
c
D
E
E1
e
L
L1
L2
Ø
Ø1
Date: 5/25/04
MIN NOM MAX
1.75
1.35
0.25
0.10 1.25
1.65
0.31
0.51
0.17
0.25
4.90 BSC
6.00 BSC
3.90 BSC
1.27 BSC
0.40 1.27
1.04 REF
0.25 BSC
0º
8º
5º
15º
c
BASE METAL
CONTACT AREA
PACKAGE: 8 PIN NSOIC
SPX431L Precision Adjustable Shunt Regulator
8
© Copyright 2004 Sipex Corporation5
PACKAGE: 3 PIN SOT-23
D
b
B
3
B
E1
1
SEE VIEW C
E
VIEW A-A
2
e
Gauge Plane
e1
Seating Plane
L
Ø
L1
VIEW C
3 PIN SOT-23
JEDEC TO-236
(AB) Variation
Dimensions in (mm)
A
MIN
A
0.89
A1
0.01
A2
NOM MAX
-
1.12
-
0.88
0.95
1.02
0.30
-
0.50
c
0.08
-
0.20
2.80
2.90
e
0.95 BSC
e1
1.90 BSC
E
2.10
1.40
1.30
L
0.40
0.50
SIDE VIEW
b
c
0.60
0.54 REF
L1
Ø
C
A1
WITH PLATING
2.64
1.20
A
3.04
-
E1
Seating Plane
0.10
b
D
A2
A
0º
-
BASE METAL SECTION B-B
8º
3 PIN SOT-23
Date: 5/25/04
SPX431L Precision Adjustable Shunt Regulator
9
© Copyright 2004 Sipex Corporation5
PACKAGE: 3 PIN SOT-89
D
D1
3
Ø1.0
H
E
5º(2x)
L
1
2
e
e1
C
Dimensions in (mm)
3 PIN SOT-89
MIN
A
b
L
1.40
0.36
NOM MAX
1.50
0.42
0.80
-
1.60
8º(2x)
0.48
1.20
b1
0.41
0.47
0.53
C
0.38
0.40
0.43
D
4.40
4.50
4.60
D1
1.40
1.60
1.75
H
3.94
-
4.25
E
2.40
2.50
2.60
e
1.45
1.50
1.55
e1
2.90
3.00
3.10
Ro.15
b
b1
b
3 PIN SOT-89
Date: 5/25/04
SPX431L Precision Adjustable Shunt Regulator
10
© Copyright 2004 Sipex Corporation5
PACKAGE: 3 PIN TO-92
L
e1
e
W
D
A
b
S1
3 PIN TO-92
SYMBOL
A
b
E
e
e1
L
R
S1
W
D
a
DIMENSIONS
IN
INCHES
MIN NOM
.170
.014
.130
.095
.045
.500
.085
.045
.016
.175
4º
-
MAX
R
.195
.020
.155
.105
.055
.610
.095
.060
0.022
E
.195
6º
a(2x)
3 PIN TO-92
Date: 5/25/04
SPX431L Precision Adjustable Shunt Regulator
11
© Copyright 2004 Sipex Corporation5
ORDERING INFORMATION
PART NUMBER
ACCURACY OUTPUT VOLTAGE
PACKAGES
SPX431LAM ........................ 0.5% .............. 2.503V ................................ 3-Pin SOT-23
SPX431LAM/TR .................. 0.5% .............. 2.503V ................................ 3-Pin SOT-23
SPX431LAM1 ...................... 0.5% .............. 2.503V ................................ 3-Pin SOT-89
SPX431LAM1/TR ................ 0.5% .............. 2.503V ................................ 3-Pin SOT-89
SPX431LAS ........................ 0.5% .............. 2.503V .................................. 8-Pin nSOIC
SPX431LAS/TR ................... 0.5% .............. 2.503V .................................. 8-Pin nSOIC
SPX431LAN ........................ 0.5% .............. 2.503V .................................. 3-Pin TO-92
SPX431LAN/TR .................. 0.5% .............. 2.503V .................................. 3-Pin TO-92
SPX431LM ..........................
SPX431LM/TR ....................
SPX431LM1 ........................
SPX431LM1/TR ..................
SPX431LS ...........................
SPX431LS/TR .....................
SPX431LN ...........................
SPX431LN/TR .....................
1.0% .............. 2.495V ................................ 3-Pin SOT-23
1.0% .............. 2.495V ................................ 3-Pin SOT-23
1.0% .............. 2.495V ................................ 3-Pin SOT-89
1.0% .............. 2.495V ................................ 3-Pin SOT-89
1.0% .............. 2.495V .................................. 8-Pin nSOIC
1.0% .............. 2.495V .................................. 8-Pin nSOIC
1.0% .............. 2.495V .................................. 3-Pin TO-92
1.0% .............. 2.495V .................................. 3-Pin TO-92
SPX431LCM ........................
SPX431LCM/TR ..................
SPX431LCM1 ......................
SPX431LCM1/TR ................
SPX431LCS ........................
SPX431LCS/TR ..................
SPX431LCN ........................
SPX431LCN/TR ..................
2.0% .............. 2.495V ................................ 3-Pin SOT-23
2.0% .............. 2.495V ................................ 3-Pin SOT-23
2.0% .............. 2.495V ................................ 3-Pin SOT-89
2.0% .............. 2.495V ................................ 3-Pin SOT-89
2.0% .............. 2.495V .................................. 8-Pin nSOIC
2.0% .............. 2.495V .................................. 8-Pin nSOIC
2.0% .............. 2.495V .................................. 3-Pin TO-92
2.0% .............. 2.495V .................................. 3-Pin TO-92
Available in lead free packaging. To order add “-L” suffix to part number.
Example: SPX431LM/TR = standard; SPX431LM-L/TR = lead free
/TR = Tape and Reel
Pack quantity is 2,000 for TO-92, 2,500 for SOT-89, SOT-23, and SOT-23.
Corporation
ANALOG EXCELLENCE
Sipex Corporation
Headquarters and
Sales Office
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the
application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others.
Date: 5/25/04
SPX431L Precision Adjustable Shunt Regulator
12
© Copyright 2004 Sipex Corporation5