FSP431 FOSLINK | Alldatasheet
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ADJUSTABLE PRECISION SHUNT REGULATOR 2007-1-24 1/15 FSP431 PIN CONFIGURATION ( 1 ) T O 9 2 - 3 L ( 2 ) S O T 2 3 - 3 L ( T o p V i e w ) ( T o p V i e w ) BLOCK DIAGRAM SYMBOL FEATURES z Equivalent Full-Range Temperature Coefficient ： 30 ppm/℃ z 0.2 ΩTypical Output Impedance z Sink-Current Capability ：1 mA to 100 mA z Low Output Noise z Adjustable Output Voltage ：Vref to 36 V z TO92-3L, SOT23-3L Package GENERAL DESCRIPTION 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 resist ors. These devices have a typical output impedance of 0.2 Ω . 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. CATHODE ANODE REF
ADJUSTABLE PRECISION SHUNT REGULATOR 2007-1-24 2/15 FSP431 EQUIVALENT SCHEMATIC Note: All component values are nominal. ABSOLUTE MAXIMUM RATINGS (NOTE 1) Parameter Rating Unit Cathode Voltage, VKA (Note 2) 37 V Continuous Cathode Current Range, IKA -100 to 150 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. RECOMMENDED OPERATING CONDITIONS Parameter Rating Unit Cathode Voltage, VKA Vref to 36 V Cathode Current, IKA 1 to 100 mA Operating Temperature, TA 0 to 70 °C
ADJUSTABLE PRECISION SHUNT REGULATOR 2007-1-24 3/15 FSP431 ELECTRICAL CHARACTERISTICS (TA=25°C, Unless otherwise noted) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Reference Voltage V REF V KA = VREF, IKA =10mA 2.47 2.495 2.52 V Deviation of reference voltage over full temperature range (see Figure 1) VI(dev) VKA = VREF, IKA =10mA TA= full range 4 25 mV ∆VKA =10V- VREF -4.7 -2.7 Ratio of change in reference voltage to the change in cathode voltage ∆VREF/∆VKA I KA =10mA ∆VKA =36V- 10V -1 -2 mV/V Reference Current I REF I KA =10mA, R1=10kΩ, R2=∞ 2 4 µA Deviation of reference current over full temperature range (see Figure 1) II(dev) IKA =10mA, R1=10kΩ, R2=∞ TA= full range 0.8 1.2 µA Minimum Cathode Current for regulation IMIN V KA = VREF 0.4 0.6 mA Off-state Cathode Current I OFF V KA =36V, VREF =0 0.1 0.5 mA Dynamic Impedance (see Figure 1) ∣ZKA∣ IKA =1mA to 100Ma, VKA = VREF f≤1kHz 0.2 0.5 Ω The deviation parameters V ref(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
ADJUSTABLE PRECISION SHUNT REGULATOR 2007-1-24 9/15 FSP431 TYPICAL CHARACTERISTICS
ADJUSTABLE PRECISION SHUNT REGULATOR 2007-1-24 10/15 FSP431 TYPICAL CHARACTERISTICS (CONTINUED)
ADJUSTABLE PRECISION SHUNT REGULATOR 2007-1-24 11/15 FSP431 TYPICAL CHARACTERISTICS (CONTINUED)
ADJUSTABLE PRECISION SHUNT REGULATOR 2007-1-24 12/15 FSP431 TYPICAL CHARACTERISTICS(CONTINUED) Test circuit for curve A Test circuit for curve B, C and D
ADJUSTABLE PRECISION SHUNT REGULATOR 2007-1-24 13/15 FSP431 ORDERING INFORMATION MARKING INFORMATION ( 1 ) T O 9 2 - 3 L ( 2 ) S O T 2 3 - 3 L FSP431XXX Package: V: TO92-3L C: SOT23-3L Packing: Blank: Tube or Bulk A: Tape & Reel Temperature Grade: Blank: 0~70℃ FSP431 YYWWXX Logo Part Number Internal Code Date Code: YY: Year (01=2001) WW: Nth week (01~52) SAYMX Internal Code Date Code: Y: Year (1=2001) M: Month (1~9, O,N,D) Part Number: FSP431
ADJUSTABLE PRECISION SHUNT REGULATOR 2007-1-24 14/15 FSP431 PACKAGE INFORMATION (1) TO92-3L A1 1.016 0.040 L 13.00 15.50 0.512 0.610 A e E L b D
ADJUSTABLE PRECISION SHUNT REGULATOR 2007-1-24 15/15 FSP431 (2) SOT23-3L Dimensions In Millimeters Dimensions In Inches Symbol Min. Max. Min. Max. A 1.050 1.250 0.041 0.049 A1 0.000 0.100 0.000 0.004 A2 1.050 1.150 0.041 0.045 b 0.300 0.400 0.012 0.016 C 0.100 0.200 0.004 0.008 D 2.820 3.020 0.111 0.119 E 2.650 2.950 0.104 0.116 E1 1.500 1.700 0.060 0.068 L 0.300 0.600 0.012 0.024 L1 0.700REF 0.028REF e1 0.95 Bsc. 0.038 Bsc. e 1.90 Bsc. 0.076 Bsc. θ 0 º 8º 0º 8º A L θ C D e b E