ACE432

                                                                                          ACE432                                               Technology Description Precision adjustable shunt voltage reference The ACE432 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 1.24V) to 8V with two external resistors. The device has a typical output impedance of 0.30Ω. Active output circuitry provides a very sharp turn on characteristic, making this device excellent replacement for Zener diodes in many applications. The ACE432 is characterized for operation from 0℃ to 105℃, and two package options (SOT-23-3 and TO-92) allow the designer the opportunity to select the proper package for their applications. Features • • • • • • • • • • • • Low voltage operation (1.24V) Adjustable output voltage VD=VREF to 8V Wide operating current range 60μA to 100mA Low dynamic output impedance 0.30Ω (Typ.) Trimmed bandgap design up ±0.5% ESD rating is 2.5KV (Per MIL-STD-883D) Application Linear Regulators Adjustable Supplies Switching Power Supplies Battery Operated Computers Instrumentation Computer Disk Drives Absolute Maximum Ratings Parameter Cathode to Anode Voltage Continuous Cathode Current (Note 2) Symbol VKA IKA IREF Max 8 150 3 Unit V mA mA Reference Input Current Thermal resistance junction to ambient TO-92 SOP-8 SOT-89-3 SOT-23-3 SOT-23-5 Operating junction temperature Storage temperature range Lead temperature (soldering) 10sec into, negative out of the specified terminal. θJA TJ TSTG TLEAD 220 150 O C/W 120 230 230 O 150 C - 45 to 150 OC O 260 C Note 1: Exceeding these rating could cause damage to the device. All voltages are with respect to Ground. Currents are positive Note 2: Voltage values are with respect to the anode terminal unless otherwise noted. VER 1.2 1                                                                                            ACE432                                               Technology Packaging Type TO-92 1 2 3 1 2 3 4 Precision adjustable shunt voltage reference SOP-8 8 7 6 5 SOT-89-3 SOT-23-3(A)/(B) 3 1 2 3 1 2 SOT-23-5 5 4 1 2 3 Pin TO-92 SOP-8 SOT-89-3 SOT-23-3(A) SOT-23-3(B) SOT-23-5 Cathode 1 1 3 2 1 3 Anode 2 2.3.6.7 2 3 3 5 Ref 3 8 1 1 2 4 NC 4.5 1.2 Ordering information Selection Guide ACE432 XX XXX + H Halogen - free Pb - free EP : TO-92 FM : SOP-8 AM : SOT-89-3 BMA: SOT-23-3(A) BMB: STO-23-3(B) BN : SOT-23-5 Reference Voltage accuracy : A : 0.5% B : 1% C: 1.5% D: 2%  VER 1.2 2                                                                                           ACE432                                               Technology Power Dissipation Table Package EP BM Precision adjustable shunt voltage reference θJA Df(mW/℃) TA≤ 25 OC TA=50 OC TA= 75 OC ( C /W ) TA≧25℃ Power rating(mW) Power rating(mW) Power rating (mW) 220 6.41 568 455 341 230 3.50 543 435 326 O Note: 1.Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into Thermal shutdown. 2.TJ: Junction Temperature Calculation TJ = TA + ( PD x θJA ) The θJA numbers are guidelines for the thermal performance of the device/PC-board system. All of the above assume no Ambient airflow. 3.θJA : Thermal Resistance-Junction to Ambient, DF: Derating factor, Po: Power consumption Electrical Characteristics Parameter Reference Voltage 0.5% 1.0% 1.5% 2.0% Symbol VREF Test Conditions VKA=VREF, IKA=10mA Test Circuit #1 VKA=VREF, IKA=10mA TA=0℃ to 105℃ Test Circuit #1 IKA=10mA ΔVKA=8V to VREF Test Circuit #2 IKA=10mA, R1=10KΩ, R2=∞ Test Circuit #2 IKA=10mA, TA=0℃ to 105℃ R1=10KΩ, R2=∞ Test Circuit #2 VKA=VREF Test Circuit #1 VKA=8V, VREF=0 Test Circuit #3 IKA=100μA-80mA VKA=VREF, f≦1KHz Test Circuit #1 Min. 1.234 1.228 1.211 1.215 Typ. 1.240 1.240 1.240 1.240 10 Max. 1.246 1.252 1.259 1.265 25 Unit V Deviation of reference voltage over full temperature range Ratio of change in reference voltage to the change in cathode voltage Reference current Deviation of Reference current over full temperature range Minimum cathode current for regulation Off-state cathode current Dynamic impedance VI(DEV) mV ΔVREF/ΔKA -1.0 -2.7 mV/V IREF 0.15 2 μA II(DEV) IMIN IOFF IZKAI 0.10 60 0.04 0.3 0.50 100 0.8 1.0 μA μA μA Ω VER 1.2 3                                                                                           ACE432                                               Technology Block Diagram Precision adjustable shunt voltage reference Symbol Diagram Typical Applications ACE432 Test Circuits Test Circuit 1: VKA=VREF Test Circuit 2: VKA>VREF Test Circuit 3: Off State Current VER 1.2 4                                                                                           ACE432                                               Technology Typical Performance Characteristics Cathode Current VS Cathode Voltage Precision adjustable shunt voltage reference Cathode Voltage (V) Reference Voltage VS Temperature (IIoad=10mA) Temperature (℃) Reference Input Current VS Temperature (R1=10K, R2=∞, IIoad=10mA) Temperature (℃) VER 1.2 5                                                                                           ACE432                                               Technology Typical Performance Characteristics Stability Boundary Condition Precision adjustable shunt voltage reference 150Ohm Test Circuit for VKA=VREF 150Ohm Test Circuit for VKA=2V, 3V The areas under the curves represent conditions that may cause the device to oscillate. For VKA=2V and 3V curves, R2 and VBAT were adjusted to establish the initial VKA and 1K conditions with CL=0. VBAT and CL then were adjusted to determine the ranges of stability. As the graph suggested, ACE432 is unconditional stable with IK from 0 to 100mA and with CL from 0.001uF to 1Uf. VER 1.2 6                                                                                           ACE432                                               Technology Packing Information TO-92 Precision adjustable shunt voltage reference VER 1.2 7                                                                                           ACE432                                               Technology Packing Information SOP-8 Precision adjustable shunt voltage reference VER 1.2 8                                                                                           ACE432                                               Technology Packing Information SOT-89-3 Precision adjustable shunt voltage reference VER 1.2 9                                                                                           ACE432                                               Technology Packing Information SOT-23-3 Precision adjustable shunt voltage reference VER 1.2 10                                                                                           ACE432                                               Technology Packing Information SOT-23-5 Precision adjustable shunt voltage reference VER 1.2 11                                                                                           ACE432                                               Technology Precision adjustable shunt voltage reference 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