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| ACE431S Technology Description Adjustable Precision Shunt Regulator The ACE431S is a low voltage three terminal adjustable shunt regulator with a guaranteed thermal stability over applicable temperature ranges. The output voltage can be set to any value between VREF (approximately 2.5 V) to 18V with two external resistors. This device has a typical output impedance of 0.08. Active output circuitry provides a very sharp turn on characteristic, making this device excellent replacement for Zener diodes in many applications. The ACE431S is characterized for operation from -40oC to 85oC, and five package options (SOT-23-3, SOT-23-5, SOP-8, TO-92 and SOT-89-3) allow the designer the opportunity to select the proper package for their applications. Features Low voltage operation (2.5V) Adjustable output voltage V0=VREF to 18V Wide operating current range 150A to 80mA Low dynamic output impedance 0.08 (Typ) Trimmed bandgap design up to +0.5% ESD rating is 6KV (Per MIL-STD-883D) ROHS Compliant and 100% Lead (Pb)-Free Application Linear Regulators Adjustable Supplies Switching Power Supplies Battery Operated Computers Instrumentation Computer Disk Drives Absolute Maximum Ratings Parameter Symbol Cathode Voltage VKA Continuous Cathode Current IKA Reference Current IREF Operating Junction Temperature Range TJ Storage Temperature Range TSTG Max Unit 18 V 80 mA 1 mA O -40 to 85 C O -65 to 150 C SOT-89-3 120 SOT-23-3 230 SOT-23-5 230 OC/W SOP-8 150 TO-92 220 Thermal Resistance JA VER 1.2 1 ACE431S Technology Packaging Type SOP-8 1 2 3 4 8 7 6 5 1 2 1 Adjustable Precision Shunt Regulator SOT-23-3 3 SOT-23-3(A) 3 SOT-89-3 2 1 2 3 SOT-23-5 5 4 TO-92 3 2 1 1 2 3 Pin SOP-8 SOT-23-3 SOT-23-3(A) SOT-89-3 SOT-23-5 TO-92 Cathode 1 2 1 3 3 3 Anode 2.3.6.7 3 3 2 5 2 NC 4.5 1.2 Ref 8 1 2 1 4 1 Ordering information Selection Guide ACE431S X XX + H Halogen-free Pb-free BM : SOT-23-3 BMA : SOT-23-3(A) BN : SOT-23-5 AM : SOT-89-3 EP : TO-92 FM : SOP-8 Reference Voltage accuracy : A : 0.5% B : 1% C : 2% VER 1.2 2 ACE431S Technology Block Diagram Adjustable Precision Shunt Regulator Symbol Diagram Electrical Characteristics TA=25 unless otherwise specified. Parameter 0.5% Reference Voltage 1% 2% Deviation of reference voltage over full temperature range Ration of change in reference voltage to the change in cathode voltage Minimum cathode current for Regulation Dynamic Impedance Reference Current Test Circuit 1 Symbol VREF Conditions VKA=VREF, IKA=10mA VKA=VREF, IKA=10mA TA=-40 to 85 IKA=3 mA, VKA=10V- VREF VKA=VREF VKA=VREF, IKA=1 to 80mA, f1.0KHz IKA=10mA, Min 2483 2470 2445 Typ 2495 2495 2495 -14 Max 2507 2520 2545 Units mV 1 VI(Dev) mV 2 1 1 2 IVREF/VKAI IMIN ZKA IREF 0.2 0.15 0.08 0.3 2.7 0.3 0.7 4 mV/V A A 3 VER 1.2 ACE431S Technology Deviation of Reference current over Full Temperature Range Off-State cathode current Adjustable Precision Shunt Regulator R1=10K, R2= IKA=10mA, R1=10K, R2=, TA=-40 to 85 VKA=18V, VREF=0 2 3 II(dev) IOFF -0.13 0.4 1.0 A A Typical Circuit Test Circuit 1: VKA=VREF Test Circuit 2: VKA>VREF Test Circuit 3: Off State Current VER 1.2 4 ACE431S Technology Application Diagram Adjustable Precision Shunt Regulator ACE431S Typical Performance Characteristics Cathode Current vs. Cathode Voltage Cathode Current vs. Cathode Voltage Cathode Voltage (V) Cathode Voltage (V) VER 1.2 5 ACE431S Technology Reference Voltage vs. Junction Temperature Adjustable Precision Shunt Regulator Stability Boundry Conditions Junction Temperature () Load Capacitance /pf Thermal Consideration Package SOT-23-3 (JA=230/W) SOT-23-5 (JA=230/W) TO-92 (JA=220/W) 1. 2. 3. Power Rating (TA=25) Power Rating (TA=50) Power Rating (TA=70) 435mW 435mW 455mW 326mW 326mW 341mW 239mW 239mW 250mW Maximum junction temperature is 125 JA is measured with packages mounted onboard under still-air condition with 1W power applied. Power rating is calculated using PD=(TJ-TA)/ JA, where TJ denotes junction temperature and TA denotes ambient temperature. VER 1.2 6 ACE431S Technology Packing Information TO-92 Adjustable Precision Shunt Regulator VER 1.2 7 ACE431S Technology Packing Information SOT-23-3 Adjustable Precision Shunt Regulator VER 1.2 8 ACE431S Technology Packing Information SOT-23-5 Adjustable Precision Shunt Regulator VER 1.2 9 ACE431S Technology Packing Information SOT-89-3 Adjustable Precision Shunt Regulator VER 1.2 10 ACE431S Technology Packing Information SOP-8 Adjustable Precision Shunt Regulator VER 1.2 11 ACE431S Technology Adjustable Precision Shunt Regulator Notes ACE does not assume any responsibility for use as critical components in life support devices or systems without the express written approval of the president and general counsel of ACE Electronics Co., LTD. As sued herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and shoes failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. ACE Technology Co., LTD. http://www.ace-ele.com/ VER 1.2 12 |
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