FOSLINK FSP431VA Adjustable precision shunt regulator Datasheet

ADJUSTABLE PRECISION SHUNT REGULATOR
FSP431
„
FEATURES
„
z
z
z
z
z
z
Equivalent Full-Range Temperature Coefficient :
30 ppm/℃
0.2ΩTypical Output Impedance
Sink-Current Capability :1 mA to 100 mA
Low Output Noise
Adjustable Output Voltage :Vref to 36 V
TO92-3L, SOT23-3L Package
The FSP431 is three-terminal adjustable shunt
regulators with specified thermal stability over
applicable automotive, commercial, and military
temperature ranges. The output voltage can be set to
any value between Vref (approximately 2.5 V) and 36 V
with two external resistors. These devices have a
typical output impedance of 0.2Ω . Active output
circuitry provides a very sharp turn-on characteristic,
making these devices excellent replacements for Zener
diodes in many applications, such as onboard
regulation, adjustable power supplies, and switching
power supplies.
„
PIN CONFIGURATION
(1) TO92-3L
GENERAL DESCRIPTION
(2) SOT23-3L
(Top View)
(Top View)
CATHODE
ANODE
REF
1/15
„
BLOCK DIAGRAM
„
SYMBOL
2007-1-24
ADJUSTABLE PRECISION SHUNT REGULATOR
FSP431
„
EQUIVALENT SCHEMATIC
Note: All component values are nominal.
„
ABSOLUTE MAXIMUM RATINGS (NOTE 1)
Parameter
Cathode Voltage, VKA (Note 2)
Continuous Cathode Current Range, IKA
Rating
37
-100 to 150
Unit
V
mA
Reference Input Current Range
-50µA to 10mA
Operating Temperature
0 to 70
°C
Storage Temperature
-65 to 150
°C
Note 1: These are stress ratings only. Stresses exceeding the range specified under “Absolute Maximum Ratings’
may cause substantial damage to the device. Functional operation of this device at other conditions beyond
those listed in specifications is not implied and prolonged exposure to extreme conditions may affect device
reliability.
Note 2: Voltage values are with respect to the anode terminal unless otherwise noted.
„
2/15
RECOMMENDED OPERATING CONDITIONS
Parameter
Cathode Voltage, VKA
Cathode Current, IKA
Rating
Vref to 36
1 to 100
Unit
V
mA
Operating Temperature, TA
0 to 70
°C
2007-1-24
ADJUSTABLE PRECISION SHUNT REGULATOR
FSP431
„
ELECTRICAL CHARACTERISTICS
(TA=25°C, Unless otherwise noted)
PARAMETER
SYMBOL
Reference Voltage
VREF
Deviation of reference voltage
over full temperature range
VI(dev)
(see Figure 1)
Ratio of change in reference
voltage to the change in cathode ∆VREF/∆VKA
voltage
Reference Current
IREF
Deviation of reference current
II(dev)
over full temperature range
(see Figure 1)
Minimum Cathode Current for
IMIN
regulation
Off-state Cathode Current
IOFF
Dynamic Impedance
∣ZKA∣
(see Figure 1)
TEST CONDITIONS
VKA = VREF, IKA =10mA
MIN
2.47
TYP
2.495
MAX
2.52
UNIT
V
4
25
mV
∆VKA =10V- VREF
-4.7
-2.7
∆VKA =36V- 10V
-1
-2
IKA =10mA, R1=10kΩ, R2=∞
2
4
µA
IKA =10mA, R1=10kΩ, R2=∞
TA= full range
0.8
1.2
µA
VKA = VREF
0.4
0.6
mA
VKA =36V, VREF =0
IKA =1mA to 100Ma, VKA = VREF
f≤1kHz
0.1
0.5
mA
0.2
0.5
Ω
VKA = VREF, IKA =10mA
TA= full range
IKA =10mA
mV/V
The deviation parameters Vref(dev) and Iref(dev) are defined as the differences between the maximum and minimum
values obtained over the recommended temperature range. The average full-range temperature coefficient of the
reference voltage, Vref, is defined as:
Where :
∆TA is the recommended operating free-air temperature range of the device.
αVref can be positive or negative, depending on whether minimum Vref or maximum Vref, respectively , occurs at
the lower temperature.
Example : maximum Vref=2.496V at 30°C, minimum Vref =2.492V at 0°C, Vref=2.495V at 25°C,
Because minimum Vref occurs at the lower temperature, the coefficient is positive.
Calculating Dynamic Impedance
The dynamic impedance is defined as:
When the device is operating with two external resistors, the total dynamic impedance of the circuit is given by:
Figure 1: Calculating Deviation Parameters and Dynamic Impedance
3/15
2007-1-24
ADJUSTABLE PRECISION SHUNT REGULATOR
FSP431
„
PARAMETER MEASUREMENT INFORMATION
Figure 2: Test Circuit for VKA=VREF
Figure 3: Test Circuit for VKA>VREF
Figure 4: Test Circuit for Ioff
„
APPLICATION INFORMATION
Note A: R should provide cathode current ≥ 1mA to the FSP431 at minimum.(VI(BATT))
Figure 5: shunt regulator
Figure 6: Single-Supply comparator with temperature-compensated threshold
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ADJUSTABLE PRECISION SHUNT REGULATOR
FSP431
Note A: R should provide cathode current ≥ 1mA to the FSP431 at minimum.(VI(BATT))
Figure 7: Precision high-current series regulator
Figure 8: Output control of a three terminal fixed regulator
Figure 9: High current shunt regulator
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ADJUSTABLE PRECISION SHUNT REGULATOR
FSP431
Note A: Refer to the stability boundary condition to determine allowable values for C.
Figure 9: Crowbar Circuit
Figure 10: Precision 5V 1.5A regulator
Note A: Rb should provide cathode current ≥ 1mA to the FSP431.
Figure 11: Efficient 5V precision regulator
6/15
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ADJUSTABLE PRECISION SHUNT REGULATOR
FSP431
Figure 12: PWM converter with reference
Note A: R3 and R4 are selected to provide the desired LED intensity and cathode current ≥ 1mA to the FSP431 at
the available.(VI(BATT))
Figure 13: Voltage monitor
Figure 14: Delay Timer
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ADJUSTABLE PRECISION SHUNT REGULATOR
FSP431
Figure 15: Precision current limiter
Figure 16: Precision constant-current sink
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ADJUSTABLE PRECISION SHUNT REGULATOR
„
9/15
FSP431
TYPICAL CHARACTERISTICS
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ADJUSTABLE PRECISION SHUNT REGULATOR
„
10/15
FSP431
TYPICAL CHARACTERISTICS (CONTINUED)
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ADJUSTABLE PRECISION SHUNT REGULATOR
„
11/15
FSP431
TYPICAL CHARACTERISTICS (CONTINUED)
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ADJUSTABLE PRECISION SHUNT REGULATOR
„
FSP431
TYPICAL CHARACTERISTICS(CONTINUED)
Test circuit for curve A
Test circuit for curve B, C and D
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ADJUSTABLE PRECISION SHUNT REGULATOR
„
FSP431
ORDERING INFORMATION
FSP431XXX
Package:
V: TO92-3L
C: SOT23-3L
„
Packing:
Blank: Tube or Bulk
A: Tape & Reel
Temperature Grade:
Blank: 0~70℃
MARKING INFORMATION
(1) TO92-3L
(2) SOT23-3L
Logo
FSP431
Part Number
SAYMX
YYWWXX
Internal Code
Date Code:
YY: Year (01=2001)
WW: Nth week (01~52)
13/15
Internal Code
Date Code:
Y: Year (1=2001)
M: Month (1~9, O,N,D)
Part Number: FSP431
2007-1-24
ADJUSTABLE PRECISION SHUNT REGULATOR
FSP431
„
PACKAGE INFORMATION
A1
A
(1) TO92-3L
e
D
b1
b
L
E
Symbol
A
A1
b
b1
D
E
L
e
14/15
Min.
3.302
1.016
0.330
0.406
4.445
4.445
13.00
1.150
Dimensions In Millimeters
Nom.
Max.
3.556
3.810
0.381
0.457
4.572
4.572
1.270
0.432
0.506
4.699
4.699
15.50
1.390
Min.
0.130
0.040
0.013
0.016
0.175
0.175
0.512
0.045
Dimensions In Inches
Nom.
0.140
0.015
0.018
0.180
0.180
0.050
2007-1-24
Max.
0.150
0.017
0.020
0.185
0.185
0.610
0.055
ADJUSTABLE PRECISION SHUNT REGULATOR
FSP431
(2) SOT23-3L
D
b
A2
A
2
A1
1 e1
E
E1
3
e
C
θ
L
L1
Symbol
A
A1
A2
b
C
D
E
E1
L
L1
e1
e
θ
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Dimensions In Millimeters
Min.
Max.
1.050
1.250
0.000
0.100
1.050
1.150
0.300
0.400
0.100
0.200
2.820
3.020
2.650
2.950
1.500
1.700
0.300
0.600
0.700REF
0.95 Bsc.
1.90 Bsc.
0º
8º
Dimensions In Inches
Min.
Max.
0.041
0.049
0.000
0.004
0.041
0.045
0.012
0.016
0.004
0.008
0.111
0.119
0.104
0.116
0.060
0.068
0.012
0.024
0.028REF
0.038 Bsc.
0.076 Bsc.
0º
8º
2007-1-24
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