ACE431S Adjustable Precision Shunt Regulator Description 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 0.08Ω. 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 -40 OC to 125 OC , and five package options (SOT-23-3, SOT-23-5L, 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 150μA to 80mA ● Low dynamic output impedance 0.08Ω (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 Max Unit Cathode Voltage VKA 18 V Continuous Cathode Current IKA 90 mA Reference Current IREF 1 mA Operating Junction Temperature Range TJ 150 O C Storage Temperature Range TSTG -65 to 150 O C SOT-89-3 120 SOT-23-3 230 Thermal Resistance θJA SOT-23-5L 230 OC/W SOP-8 150 TO-92 220 VER 1.4 1 ACE431S Adjustable Precision Shunt Regulator Packaging Type SOP-8 1 2 3 4 SOT-23-3 SOT-23-3(A) 3 3 SOT-89-3 8 7 6 5 1 SOT-23-5L 5 2 1 2 1 2 3 TO-92 4 3 2 1 1 2 3 Description SOP-8 SOT-23-3 SOT-23-3(A) SOT-89-3 SOT-23-5L TO-92 Cathode 1 2 1 3 3 3 Anode 2.3.6.7 3 3 2 5 2 NC 4.5 Ref 8 1.2 1 2 1 4 1 Ordering information ACE431S X XX + H Halogen-free Pb-free BM : SOT-23-3 BMA : SOT-23-3(A) BN : SOT-23-5L AM : SOT-89-3 EP : TO-92 FM : SOP-8 Reference Voltage accuracy : A : 0.5% B : 1% C : 2% VER 1.4 2 ACE431S Adjustable Precision Shunt Regulator Block Diagram Symbol Diagram Electrical Characteristics TA=25℃ unless otherwise specified. Test Circuit Parameter Symbol Conditions VREF VKA=VREF, IKA=10mA 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 1 Min Typ Max 2483 2495 2507 2470 2495 2520 2445 2495 2545 Units mV 1 VI(Dev) VKA=VREF, IKA=10mA TA=-40℃ to 85℃ -14 2 IΔVREF/ΔVKAI IKA=3 mA, ΔVKA=10V- VREF 0.2 2.7 mV/V 1 IMIN VKA=VREF 0.15 0.3 mA 1 ZKA VKA=VREF, IKA=1 to 80mA, f≦1.0KHz 0.08 0.7 Ω mV VER 1.4 3 ACE431S Adjustable Precision Shunt Regulator Reference Current Deviation of Reference current over Full Temperature Range Off-State cathode current 2 IREF 2 II(dev) 3 IOFF IKA=10mA, R1=10KΩ, R2=∞ IKA=10mA, R1=10KΩ, R2=∞, TA=0 to 125℃ VKA=18V, VREF=0 0.3 4 μA -0.13 0.4 μA 1.0 μA Typical Circuit Test Circuit 1: VKA=VREF Test Circuit 2: VKA>VREF Test Circuit 3: Off State Current VER 1.4 4 ACE431S Adjustable Precision Shunt Regulator Application Diagram ACE431S Typical Performance Characteristics Cathode Current vs. Cathode Voltage Cathode Voltage (V) Cathode Current vs. Cathode Voltage Cathode Voltage (V) VER 1.4 5 ACE431S Adjustable Precision Shunt Regulator Reference Voltage vs. Junction Temperature Stability Boundry Conditions Temperature (℃) Load Capacitance /pf Thermal Consideration Package SOT-23-3 (θJA=230℃/W) SOT-23-5L (θJA=230℃/W) TO-92 (θJA=220℃/W) Power Rating Power Rating Power Rating (TA=25℃) (TA=50℃) (TA=70℃) 435mW 326mW 239mW 435mW 326mW 239mW 455mW 341mW 250mW 1. Maximum junction temperature is 125℃ 2. θJA is measured with packages mounted onboard under still-air condition with 1W power applied. 3. Power rating is calculated using PD=(TJ-TA)/ θJA, where TJ denotes junction temperature and TA denotes ambient temperature. VER 1.4 6 ACE431S Adjustable Precision Shunt Regulator Packing Information TO-92 VER 1.4 7 ACE431S Adjustable Precision Shunt Regulator Packing Information SOT-23-3 VER 1.4 8 ACE431S Adjustable Precision Shunt Regulator Packing Information SOT-23-5L VER 1.4 9 ACE431S Adjustable Precision Shunt Regulator Packing Information SOT-89-3 VER 1.4 10 ACE431S Adjustable Precision Shunt Regulator Packing Information SOP-8 VER 1.4 11 ACE431S 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 1.4 12