SIPEX SPX431M1

SPX431
Precision Adjustable Shunt Regulator
FEATURES
APPLICATIONS
• Trimmed Bandgap to 0.5%
• Wide Operating Current..........................1mA to 150mA
• Extended Temperature Range....................0°°C to 105°°C
• Low Temperature Coefficient ............................30 ppm/°C
• Offered in TO-92, SOIC, SOT-89, SOT-23-5
• Improved Replacement in Performance for TL431
• Low Cost Solution
• Battery Operating Equipments
• Adjustable Supplies
• Switching Power Supplies
• Error Amplifiers
• Single Supply Amplifier
• Monitors / VCR / TV
• Personal Computers
PRODUCT DESCRIPTION
The SPX431 is a 3-terminal adjustable shunt voltage regulator providing a highly accurate 0.5% bandgap reference. SPX431 acts as an
open-loop error amplifier with a 2.5V temperature compensation reference. The SPX431 thermal stability, wide operating current
(150mA) and temperature range (0°C to 105°C) makes it suitable for all variety of application that are looking for a low cost solution
with high performance. SPX431 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 manufactures assembly line and contribute a significant cost
savings.
The output voltage may be adjusted to any value between VREF and 36 volts with two external resistors. The SPX431 is operating an
extended temperature range of 0°C to 105°C. The SPX431 is available in TO-92, SO-8, SOT-89, and SOT-23-5 packages.
PIN CONFIGURATIONS
8-Pin Surface Mount (S)
CATHODE
1
ANODE
2
ANODE
N/C
3
SPX431
4
8
REF
7
ANODE
6
ANODE
5
N/C
SOT-23-5 (M5)
REF
ANODE
5
4
SOT-89 (M1)
1
N/C
2
N/C
2
3
SPX431
SPX431
1
TO-92 (N)
3
CATHODE
Top View
1
REF
2
3
ANODE
Top View
CATHODE
REF
ANODE
CATHODE
Bottom View
Top View
Rev. 10/30/00
SPX431
CATHODE (K)
REFERENCE
(R)
+
2.5V
ANODE (A)
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Cathode-Anode Reverse Breakdown
Anode-Cathode Forward Current
Operating Cathode Current
Reference Input Current
Continuous Power Dissipation at 25° C
TO-92
SOT-23
8L SOIC
SOT-89
Junction Temperature
Storage Temperature
Lead Temperature (Soldering 10 sec.)
SYMBOL
VKA
IAK
IKA
IREF
PD
TJ
TSTG
TL
RATING
37
1
150
10
UNITS
V
A
mA
mA
775
200
750
1000
150
- 65 to 150
300
mW
mW
mW
mW
°C
°C
°C
Stresses greater than those listed under ABSULUTE 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
Cathode Voltage
Cathode Current
SYMBOL
VKA
IK
RATING
VREF to 20
10
TYPICAL THERMAL RESISTANCES
UNIT
V
mA
PACKAGE
TO-92
SOT-23
SOIC
SOT-89
0JA
160 °C/W
575 °C/W
175 °C/W
110 °C/W
0JC
80 °C/W
150 °C/W
45 °C/W
8 °C/W
TYPICAL DERATING
6.3 mW/°C
1.7 mW/°C
5.7 mW/°C
9.1 mW/°C
Rev. 10/30/00
SPX431
ELECTRICAL CHARACTERISTICS at 25°C IK @ 10mA VK = VREF, unless otherwise specified.
Parameter
Symbol
Reference Voltage
Test Conditions
VREF
∆VREF with Temp.∗
Ratio of Change in VREF to
Cathode Voltage
Reference Input Current
IREF Temp Deviation
Min IK for Regulation
Off State Leakage
TC
∆ VREF
∆VK
IREF
∆IREF
IK(MIN)
IK(OFF)
Dynamic Output Impedance
ZKA
Test Circuit
1
1
1
TA = 25°C
Over Temp.
VREF to 10V
10V to 36V
Min
2.490
2.469
2
2
2
1
Over Temp.
VREF = 0V,
VKA = 36V
-2.7
-2
3
1
SPX431
Typ
2.503
Unit
Max
2.515
2.536
0.20
0.07
-1.0
-0.4
0.7
0.4
0.4
0.04
0.15
V
V
mV/°C
mV/V
0.3
4
1.2
1
250
µA
µA
mA
nA
0.5
Ω
TC = Test Circuit
mV
%
0
∆VREF
∆Τ
-10
5000
TC in %/°C =
0.5
-20
∆VREF (mV)
TC in mV/°C =
-55
-25
0
25
50
75
∆T A
TC in ppm/°C =
100 125
∆VREF
VREF at 25°C
)
0
)
0
ppm
Calculating Average Temperature Coefficient (TC)
)
x 100
∆T A
∆VREF
VREF at 25°C
)
x 10 6
∆T A
Temperature (°C)
0.06 mV/°C
0.002 %/°C
24 ppm/°C
TEST CIRCUITS
VIN
VKA = VREF
IREF
IK
VIN
R1
(VREF)
VKA
IK
VIN
VKA
IK (OFF)
IREF
R2
Figure 1a. Test Circuit 1
Figure 1b. Test Circuit 2
Figure 1c. Test Circuit 3
Rev. 10/30/00
SPX431
TYPICAL PERFORMANCE CURVES
High Current Operating Characteristics
Low Current Operating Characteristics
150
900
VKA = VREF
Temperature Range: -0°C to 125 °C
800
700
100
600
500
400
105 °C
300
25 °C
200
75
IK - Cathode Current (mA)
µA)
IK - Cathode Current (µ
VKA= V REF
Temperature Range: - 0°C to 105 °C
125
50
25
0
-25
-0 °C
100
-50
0
-75
-100
-100
-200
-1.0
0
1.0
2.0
-2
3.0
-1
0
VKA - Cathode Voltage (V)
2
3
Figure 3
Figure 2
Off State Leakage
Reference Voltage vs. Ambient Temperature
100
2.53
VKA = 36V
VREF = 0V
V KA= V REF
IK = 10 mA
2.52
VREF - Reference Voltage (V)
IZ off - Off State Cathode Current (nA)
1
VKA - Cathode Voltage (V)
10
1
0.1
2.51
2.50
VREF = 2.500 V at 25 °C
2.49
2.48
2.47
2.46
0.01
-60
-30
0
30
60
TA - Ambient Temperature ( °C)
Figure 4
90
120
2.45
-60
-30
0
30
60
90
120
TA - Ambient Temperature ( °C)
Figure 5
Rev. 10/30/00
SPX431
TYPICAL PERFORMANCE CURVES
Reference Voltage Line Regulation
Reference Input Current
3.0
0
R1 = 10 k Ω
R2 = ∞
IK = 10 mA
2.5
VKA - Cathode Voltage (V)
IREF - Reference Input Current (µA)
-10
2.0
1.5
1.0
0 °C
-20
25 °C
75 °C
-30
105 °C
-40
0.5
-50
0
-60
-30
0
30
60
90
120
0
3
6
TA - Ambient Temperature ( °C)
9
12
15
18
21
24
27
30
VKA - Cathode Voltage (V)
Figure 6
Figure 7
Low Frequency Dynamic Output Impedance
Noise Voltage
0.150
70
VKA = VREF
IKA = 1 to 100 mA
f < 1 kHz
60
0.125
ZKA - Dynamic Impedance ( Ω )
√Hz
Noise Voltage nV/√
50
40
30
20
0.100
0.075
0.050
0.025
10
V KA = V REF
IK = 10 mA
TA = 25°C
0
0.0
-60
10
100
1k
10 k
-30
0
30
60
90
120
100 k
f - Frequency (Hz)
TA - Free Air Temperature
Figure 8
Figure 9
Rev. 10/30/00
SPX431
TYPICAL PERFORMANCE CURVES
Dynamic Output Impedance
100
ZKA - Dynamic Impedance
TA = 25 °C
IK = 1 to 100 mA
10
1.0
0.1
0.01
1k
10 k
100 k
10 M
1M
f - Frequency (Hz)
Figure 10
Small Signal Voltage Gain vs. Frequency
70
AV - Small Signal Voltage Gain (dB)
Temperature Range: -0°C to 105 °C
60
IK = 10 mA
50
OUT
40
15 k
IK
230 Ω
9 µF
30
8.25 k
20
GND
10
0
1k
10 k
100 k
1M
10 M
f - Frequency (Hz)
Figure 11
Rev. 10/30/00
SPX431
TYPICAL PERFORMANCE CURVES
Pulse Response
6
INPUT
Input and Output Voltages (V)
5
INPUT
MONITOR
220 Ω
OUT
4
3
OUTPUT
50 Ω
2
fP = 100 kHz
1
GND
0
-1
0
1
2
3
4
5
6
7
8
9
10
11
12
t - Time ( µs)
Figure 12
Stability Boundary Conditions
100
A:
B:
C:
D:
90
V KA = V REF
V KA = 5V at I K = 10 mA
V KA = 10V at I K = 10 mA
V KA = 15V at I K = 10 mA
80
IK - Cathode Current (mA)
70
C
150 Ω
60
IK
50
40
STABILITY
REGION
CL
30
10 k
A
20
B
TA = 25 °C
10
D
0
100
101
102
103
104
105
C L - Load Capacitance (pF)
106
107
Figure 13
Rev. 10/30/00
SPX431
ORDERING INFORMATION
Ordering No.
SPX431M5
SPX431M1
SPX431S
SPX431N
Precision
Output Accuracy
Packages
0.5%
0.5%
0.5%
0.5%
2.5V
2.5V
2.5V
2.5V
5 Lead SOT-23
5 Lead SOT-89
8 Lead SOIC
3 Lead TO-92
Corporation
SIGNAL PROCESSING EXCELLENCE
Sipex Corporation
Headquarters and Main Offices:
22 Linnell Circle
Billerica, MA 01821
TEL: (978) 667-8700
FAX: (978) 670-9001
e-mail: [email protected]
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 935-7600
FAX: (408) 934-7500
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
hereing; neither does it convey any license under its patent rights nor the rights of others.
Rev. 10/30/00