Fairchild Semiconductor
KA431
Adjustable/2.5V, 2% Tolerance Shunt Regulator

General Description

The KA431/KA431A/KA431L are three-terminal adjustable regulator series with a guaranteed thermal stability over applicable temperature ranges. The output voltage may be set to any value between VREF (approximately 2.5 volts) and 36 volts with two external resistors. These devices have a typical dynamic output impedance of 0.2W. Active output circuitry provides a very sharp turn-on characteristic, making these devices excel lent replacement for zener diodes in many applications.

Features

  • Programmable output voltage to 36 volts
  • Low dynamic output impedance 0.20 typical
  • Sink current capability of 1.0 to 100mA
  • Equivalent full-range temperature coefficient of 50ppm/°C typical
  • Temperature compensated for operation over full rated operating temperature range
  • Low output noise voltage
  • Fast turn-on response

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Product Status/Pricing/Packaging      buy now

ProductProduct statusEco StatusPricing*Package typeLeadsPacking methodPackage Drawing
KA431DLifetime BuyRoHS CompliantN/ASOIC8RAIL PDF
KA431DTFFull ProductionRoHS Compliant$0.204SOIC8TAPE REEL TBD
KA431ZTAFull ProductionRoHS Compliant$0.071TO-92R3AMMO Z03A
KA431ZTFLifetime BuyRoHS CompliantN/ATO-92R3TAPE REEL Z03A
* Fairchild 1,000 piece Budgetary Pricing
** A sample button will appear if the part is available through Fairchild's on-line samples program. If there is no sample button, please contact a Fairchild distributor to obtain samples

Application Notes

AB-30: Auxiliary Power Applications (49 K) Oct 10, 2008
AB-31: Auxiliary Power Applications (45 K) Oct 10, 2008
AB-32: Battery Charger Applications (103 K) Oct 10, 2008
AB-33: Battery Charger Applications (103 K) Oct 10, 2008
AB-34: Battery Charger Applications (101 K) Oct 10, 2008
AB-35: CRT Monitors (150 K) Oct 10, 2008
AB-38: Color TV Applications (134 K) Oct 10, 2008
AB-39: Color TV Applications (141 K) Oct 10, 2008
AB-40: Color TV Applications (143 K) Oct 10, 2008
AB-41: Color TV Applications (141 K) Oct 10, 2008
AB-42: Color TV Applications (142 K) Oct 10, 2008
AB-43: Color TV Applications (143 K) Oct 10, 2008
AB-44: Power Over Ethernet Applications (88 K) Oct 10, 2008
AB-45: DVD Applications (83 K) Oct 10, 2008
AB-46: DVD Applications (128 K) Oct 10, 2008
AB-47: DVD Applications (115 K) Oct 10, 2008
AB-48: DVD Applications (156 K) Oct 10, 2008
AB-49: DVD Applications (136 K) Oct 10, 2008
AB-50: LCD Monitor Applications (97 K) Oct 10, 2008
AB-52: PC Power Applications (173 K) Oct 10, 2008
AB-53: PC Power Applications (113 K) Oct 10, 2008
AB-54: Set Top Box Applications (136 K) Oct 10, 2008
AB-57: Color-TV Applications (FSCQ565RT - 59 Watts) (253 K) Oct 10, 2008
AB-58: Color-TV Applications (FSCQ765RT - 83 Watts) (266 K) Oct 10, 2008
AB-59: Color-TV Applications (FSCQ965RT - 102 Watts) (240 K) Oct 10, 2008
AB-60: Color-TV Applications (FSCQ1265RT - 132 Watts) (246 K) Oct 10, 2008
AB-61: Color-TV Applications (FSCQ1465RT - 146 Watts) (245 K) Oct 10, 2008
AB-62: Color-TV Applications (FSCQ1565RT - 160 Watts) (231 K) Oct 10, 2008
AB-63: Color-TV Applications (FSCQ1565RP - 198 Watts) (232 K) Oct 10, 2008
AN-4002: PC Power Supervisory Circuit with KA3502 (220 K) Oct 10, 2008
AN-4102: A Fairchild Power Switch Based SMPS for Color Television Receivers (356 K) Oct 10, 2008
AN-4105: Design Considerations for Switched Mode Power Supplies Using a Fairchild Power Switch (FPS) in a Flyback Converter (403 K) Oct 10, 2008
AN-4108: A Fairchild Power Switch based on Switched Mode Power Supply for CRT Monitor Use (279 K) Oct 10, 2008
AN-4115: PC SMPS Secondary Side Control IC (207 K) Oct 10, 2008
AN-4116: A Fairchild Power Switch (FPS) based on Switched Mode Power Supply for LCD Monitor Use (245 K) Oct 10, 2008
AN-4128: Voltage Mode Control IC (671 K) Oct 10, 2008
AN-4129: Green Current Mode PWM Controller FAN7601 (357 K) Oct 10, 2008
AN-4134: Design Guidelines for Off-line Forward Converters using FPS (300 K) Oct 10, 2008
AN-4134SC: Chinese Translation: Design Guidelines for Off-line Forward Converters using FPS (892 K) Oct 10, 2008
AN-4137: Design Guidelines for Off-line Flyback Converters using FPS (443 K) Oct 10, 2008
AN-4137SC: Chinese Translation: Design Guidelines for Off-line Flyback Converters using FPS (858 K) Oct 10, 2008
AN-4138: Design Considerations for Battery Charger Using Green Mode Fairchild Power Switch (FPStm) (380 K) Oct 10, 2008
AN-4141: Troubleshooting and Design Tips for Fairchild Power Switch (FPStm) Flyback Applications (170 K) Oct 10, 2008
AN-4146: Design Guidelines for Quasi-Resonant Converters Using FSCQ-series Fairchild Power Switch (FPStm) (370 K) Oct 10, 2008
AN-4149: Design Guidelines for Quasi-Resonant Converters Using KA5Q-series Fairchild Power Switch (FPStm) (307 K) Oct 10, 2008
AN-4150: AN-4150 Design Guidelines for Flyback Converters Using FSQ-series Fairchild Power Switch (FPS?) (555 K) Oct 10, 2008
AN-4151: AN-4151-Half-bridge LLC Resonant Converter Design Using FSFR-series Fairchild Power Switch (FPS?) (1271 K) Oct 10, 2008
AN-6014: AN-6014 Green Current Mode PWM Controller FAN7602 (390 K) Oct 10, 2008
AN-6073: AN-6073 - FAN6751 Highly Integrated Green-Mode PWM Controller (493 K) Oct 10, 2008
AN-6075: AN-6075-Compact Green-Mode Adapter Using FSQ500L for Low Cost (684 K) Oct 10, 2008
AN-9008: The Use of QFET in Flyback Converter (124 K) Oct 10, 2008
AN-9011: High Input Voltage, Off-line Flyback Switching Power Supply using FSC IGBT (SGL5N150UF) (75 K) Oct 10, 2008
AN-9015: A180W, 100KHz Forward Converter Using QFET (65 K) Oct 10, 2008
AN-9017: Manufacturing Technology of a Small Capacity Inverter Using a Fairchild IGBT (437 K) Oct 10, 2008
AN-9041: AN-9041 PFCM Design Guide with Analog PFC IC (347 K) Oct 10, 2008
 


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