A431L AITSEMI | Alldatasheet
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AiT Semiconductor Inc. www.ait-ic.com A431L SHUNT REGULATOR ADJUSTABLE PRECISION REV1.0 - OCT 2021 RELEASED - - 1 - DESCRIPTION FEATURES The A431L is a three -terminal Adjustable Shunt Voltage Reference. Output can be set to any value between VREF (1.24V) and 18V with two external resistors (see Figure 2). The A431L operate from a lower voltage (1.24V ) than the wide ly us e A431, A431A a nd A432A shunt-regulator reference. The A431L has a typical output impedance of 0.5 Ω. Active output circuitry prov ides a very sharp turn-on characteristic, making A431L excellent replacements for Zener diodes in many applications, including on -board regulation and adjustable power supplies. The A431L is available in SOT-23 package. ⚫ Low Voltage Operation: VREF=1.24V ⚫ Adjustable Output Voltage: VREF to 18V ⚫ Reference Voltage Tolerances -0.5% for A431L-A -1% for A431L-B -1.5% for A431L-C ⚫ Low dynamic output impedance: 0.5Ω ⚫ Low output noise voltage ⚫ Fast on -state response ⚫ Sink current capability of 0.1mA to100mA ⚫ Available in SOT-23 package. APPLICATION ⚫ Shunt Regulator ⚫ High-Current Shunt Regulator ⚫ Precision Current Limiter ORDERING INFORMATION TYPICAL APPLICATION Package Type Part Number SOT-23 SPQ: 3,000pcs/Reel A431LE3R-X A431LE3VR-X Note X: Output Voltage Tolerance: A, B or C R: Tape & Reel V: Halogen free Package AiT provides all RoHS products
AiT Semiconductor Inc. www.ait-ic.com A431L SHUNT REGULATOR ADJUSTABLE PRECISION REV1.0 - OCT 2021 RELEASED - - 2 - PIN DESCRIPTION Top View Pin # Symbol Function
1 R REFERENCE
2 K CATHODE
3 A ANODE
AiT Semiconductor Inc. www.ait-ic.com A431L SHUNT REGULATOR ADJUSTABLE PRECISION REV1.0 - OCT 2021 RELEASED - - 3 - ABSOLUTE MAXIMUM RATINGS Operating temperature rangeapplies unless otherwise specified VKA, Cathode Voltage 18V IKA, Cathode Current Range (Continuous) 100mA IREF, Reference Input Current Range 6μA PD, Power Dissipation 350mW RθJA, Thermal Resistance from Junction to Ambient 357℃/W TOPR, Operating Temperature 0℃~+70℃ TJ, Junction Temperature 150℃ TSTG, Storage Temperature -65℃~ +150℃ Stress beyond above listed “Absolute Maximum Ratings” may lead permanent damage to the device. These are stress ratings only and operations of the device at these or any other conditions beyond those indicated in the operational sections of the specifications are not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
AiT Semiconductor Inc. www.ait-ic.com A431L SHUNT REGULATOR ADJUSTABLE PRECISION REV1.0 - OCT 2021 RELEASED - - 4 -
ELECTRICAL CHARACTERISTICS
TA=25℃, unless otherwise specified Parameter Symbol Conditions Min Typ. Max Unit Reference Input Voltage(Fig 1) VREF VKA=VREF, IKA=10mA 0.5% 1.2338 1.24 1.2464 V 1% 1.2276 1.24 1.2524 V 1.5% 1.2214 1.24 1.2586 V Deviation of Reference Voltage Over Full Temperature Range(Fig 1) Δ VREF(DEV) VKA =VREF, IKA =10mA 0℃≤TA≤70℃ - - 16 mV Ratio of Change in Reference Input Voltage to the change in Cathode Voltage (Fig 2) ΔVREF/ ΔVKA IKA=10mA ΔVKA=1.25V~15V - - 2.4 mV/V Deviation of Reference Input Voltage Over Temperature Range(Fig 2) ΔIREF/ ΔT lKA=10mA, R1=10kΩ, - - 0.6 μA Minimum Cathode Current for Regulation(Fig 1) IKA(MIN) VKA=VREF - - 0.1 mA Off-state Cathode Current(Fig 3) Ioff VKA=15V, VREF=0 - - 0.5 μA Dynamic Impedance ZKA VKA=VREF, lKA=0.1~20mA, f≤1.0kHz - - 0.5 Ω
AiT Semiconductor Inc. www.ait-ic.com A431L SHUNT REGULATOR ADJUSTABLE PRECISION REV1.0 - OCT 2021 RELEASED - - 6 - TYPICAL PERFORMANCE CHARACTERISTICS 1. Cathode Current vs. Cathode Voltage 2. Cathode Current vs. Cathode Voltage 3. Reference Input Voltage vs. Ambient Temperature 4. Change in Reference Input Voltage vs. Cathode Voltage 5. Reference Input Current vs. Ambient Temperature 6. Off-State Cathode Current 7. vs. Ambient Temperature
AiT Semiconductor Inc. www.ait-ic.com A431L SHUNT REGULATOR ADJUSTABLE PRECISION REV1.0 - OCT 2021 RELEASED - - 7 -
PACKAGE INFORMATION
Dimension in SOT-23 Package (Unit: mm) Plastic surface mounted package; 3 leads UNIT A B bp C D E HE A1 Lp mm 1.40 0.95 2.04 1.78 0.50 0.35 0.19 0.08 3.10 2.70 1.65 1.20 3.00 2.20 0.100 0.013 0.50 0.20
AiT Semiconductor Inc. www.ait-ic.com A431L SHUNT REGULATOR ADJUSTABLE PRECISION REV1.0 - OCT 2021 RELEASED - - 8 - IMPORTANT NOTICE AiT Semiconductor Inc. (AiT) reserves the right to make changes to any its prod uct, s pecifications, to discontinue any integrated circu it product or service without notice, and advises its customers to obtain the latest version of relev ant information to verify, before placing orders, that the information being relied on is current. AiT Semiconductor Inc.'s integrated circuit products a re not designed, intended, authorized, or warrante d to be suitable for use in life support applicatio ns, devices or systems or other critical applications. Use of AiT products in such applications is understood to be fully at the risk of the customer. A s used herein may involve potential risks of death , personal injury, or server e property, or environmental damage. In order to minimize risks associated with the customer's applications, the customer should provide adequate design and operating safeguards. AiT Semiconductor Inc . assumes to no liability to customer product design or application support. AiT warrants the performance of its products of the specifications applicable at the time of sale.