AME, Inc. AME431B n General Description The AME431B series ICs are 3-terminal adjustable shunt regulator with guaranteed temperature stability over a full operation range. These ICs feature sharp turn-on characteristics, low temperature coefficient and low output impendance, which make them ideal substitutes for Zener diodes in applications such as switching power supply, charger and other adjustable regulators. Adjustable Precision Shunt Regulator n Functional Block Diagram V+ (Cathode) REF The reference is set to 1.24V for AME431Bxxxxx12 and 2.5V for AME431Bxxxxx25. The output voltage can be set to 1.24V to 16V for VREF=1.24V part type and 2.5 to 36V for VREF=2.5V part type with two external resistors. VREF The AME431B precision reference is offered in two reference tolerance: 0.5% and 1.0% The 5 main packages have low thermal impendance GND (Anode) which allows operation over a wide range of -40oC t o +125oC. n Features n Applications l Very accurate reference voltage : 0.15% typical l Adjustable power supplies l High stability under capacitive load l Linear regulators l Low temperature deviation: 4.5mV typical l Battery operated computer l Low equivalent full-range temperature coefficient with 20PPM/oC typical l Low dynamic output resistance: 0.2Ω typical l Sink current capacity from 1mA to 100mA l Low output noise l Available in 5 packages: TO-92, SOT-23-3, SOT-89, SO-8 and SOT-25 l Portable electronics l l l l l Instrumentation Switching power supply Mother board LCD monitor Note book computer 1 AME, Inc. AME431B Adjustable Precision Shunt Regulator n Typical Applications Shunt Regulator R3 VIN VOUT R1 VO=(1+R1/R2) VREF VREF AME431B R2 High Current Shunt Regulator VIN R1 VOUT R4 R2 VO =(1+R2/R3) VREF VREF AME431B R3 Current Source or Current Limit R2 VIN IOUT IOUT =VREF/R2+IKA R1 AME431B 2 AME, Inc. AME431B Adjustable Precision Shunt Regulator n Typical Applications (contd.) Precision 5V 1.5A Regulator VIN AME1117 VOUT 5V, 1.5A Adjust R1 8.2K R2 250 AME431B R3 250 Precision 5V 1.5A Regulator R3 C1 R4 R2 680 VOUT R5 U2 R1 C2 Q1 3 COMP PWM Controller R6 2 AME431B VFB 4 PS521 3 AME, Inc. AME431B Adjustable Precision Shunt Regulator n Pin Configuration SOT-23 Top View SOT-23 Top View 3 AME431B 1 AME431BAJETXXXX 1. Cathode 2. REF 3. Anode 3 AME431B 1 2 SOT-89 Front View AME431B 1 2 7 AME431BAJFTXXXX 1. REF 2. Anode 3. Cathode 1 4 2 2 3 AME431BAJATXXXX 1. REF 2. Anode 3. Cathode 3 6 SOT-25 Top View 5 AME431B 1 2 TO-92-3 Bottom View SO-8 Top View 8 AME431BBJETXXXX 1. REF 2. Cathode 3. Anode 3 4 AME431BAJHAXXXX 1. Cathode 2. Anode 3. Anode 4. NC 5. NC 6. Anode 7. Anode 8. REF 5 4 AME431B 1 2 3 AME431BAJEVXXXX 1. NC 2. NC 3. Cathode 4. REF 5. Andode AME, Inc. AME431B Adjustable Precision Shunt Regulator n Ordering Information 431B x x x x x x x Special Feature Reference Voltage Accuracy Number of Pins Package Type Operating Temperature Range Pin Configuration Pin Configuration A (SOT-23) B (SOT-23) A (SOT-89) A (TO-92-3) A (SO-8) A (SOT-25) 1. Cathode 2. REF 3. Anode Operating Temperature Range J: -40OC to 125OC Package Type A: E: F: H: TO-92 SOT-2X SOT-89 SO-8 Number Accuracy of Pins A: 8 T: 3 V: 5 A: 0.5% B: 1.0% Reference Voltage 12: 1.24V 25: 2.5V Special Feature L: Low profile Y: Lead free & Low profile Z: Lead free 1. REF 2. Cathode 3. Anode 1. REF 2. Anode 3. Cathode 1. REF 2. Anode 3. Cathode 1. Cathode 2. Anode 3. Anode 4. NC 5. NC 6. Anode 7. Anode 8. REF 1. NC 2. NC 3. Cathode 4. REF 5. Anode 5 AME, Inc. AME431B Adjustable Precision Shunt Regulator n Ordering Information (contd.) Part Number Marking* Reference Voltage Accuracy Package Temp. Range AME431BAJETA12 AZNww 1.24V 0.5% SOT-23 - 40oC to + 125oC AME431BAJETA12L AZNww 1.24V 0.5% SOT-23 - 40oC to + 125oC AME431BAJETA12Y AZNww 1.24V 0.5% SOT-23 - 40oC to + 125oC AME431BAJETA12Z AZNww 1.24V 0.5% SOT-23 - 40oC to + 125oC AME431BAJETB12 AZOww 1.24V 1.0% SOT-23 - 40oC to + 125oC AME431BAJETB12L AZOww 1.24V 1.0% SOT-23 - 40oC to + 125oC AME431BAJETB12Y AZOww 1.24V 1.0% SOT-23 - 40oC to + 125oC AME431BAJETB12Z AZOww 1.24V 1.0% SOT-23 - 40oC to + 125oC AME431BBJETA12 AZPww 1.24V 0.5% SOT-23 - 40oC to + 125oC AME431BBJETA12L AZPww 1.24V 0.5% SOT-23 - 40oC to + 125oC AME431BBJETA12Y AZPww 1.24V 0.5% SOT-23 - 40oC to + 125oC AME431BBJETA12Z AZPww 1.24V 0.5% SOT-23 - 40oC to + 125oC AME431BBJETB12 AZQww 1.24V 1.0% SOT-23 - 40oC to + 125oC AME431BBJETB12L AZQww 1.24V 1.0% SOT-23 - 40oC to + 125oC AME431BBJETB12Y AZQww 1.24V 1.0% SOT-23 - 40oC to + 125oC AME431BBJETB12Z AZQww 1.24V 1.0% SOT-23 - 40oC to + 125oC * Package Options Part Number Package Lead Pitch AME431BXEAX TO-92 Taping 5.04mm AME431BXEAX-1 TO-92 Bulk 2.54mm Note: yyww & ww represents the date code * A line on top of the first letter represents lead free plating such as AZN Please consult AME sales office or authorized Rep./Distributor for output voltage and package type availability. 6 AME, Inc. AME431B Adjustable Precision Shunt Regulator n Ordering Information (contd.) Part Number AME431BAJATA12 AME431BAJATA12Z AME431BAJATB12 AME431BAJATB12Z Marking* AME12 431B AJATA yyww AME12 431B AJATA yyww AME12 431B AJATB yyww AME12 431B AJATB yyww Reference Voltage Accuracy Package Temp. Range 1.24V 0.5% TO92-3 - 40oC to + 125oC 1.24V 0.5% TO92-3 - 40oC to + 125oC 1.24V 1.0% TO92-3 - 40oC to + 125oC 1.24V 1.0% TO92-3 - 40oC to + 125oC AME431BAJETA25 BAFww 2.5V 0.5% SOT-23 - 40oC to + 125oC AME431BAJETA25L BAFww 2.5V 0.5% TSOT-23 - 40oC to + 125oC AME431BAJETA25Z BAFww 2.5V 0.5% SOT-23 - 40oC to + 125oC AME431BAJETA25Y BAFww 2.5V 0.5% TSOT-23 - 40oC to + 125oC AME431BBJETA25 BAGww 2.5V 0.5% SOT-23 - 40oC to + 125oC AME431BBJETA25L BAGww 2.5V 0.5% TSOT-23 - 40oC to + 125oC AME431BBJETA25Z BAGww 2.5V 0.5% SOT-23 - 40oC to + 125oC AME431BBJETA25Y BAGww 2.5V 0.5% TSOT-23 - 40oC to + 125oC AME431BAJETB25 AZAww 2.5V 1.0% SOT-23 - 40oC to + 125oC AME431BAJETB25L AZAww 2.5V 1.0% TSOT-23 - 40oC to + 125oC AME431BAJETB25Z AZAww 2.5V 1.0% SOT-23 - 40oC to + 125oC AME431BAJETB25Y AZAww 2.5V 1.0% TSOT-23 - 40oC to + 125oC AME431BBJETB25 AZBww 2.5V 1.0% SOT-23 - 40oC to +125oC AME431BBJETB25L AZBww 2.5V 1.0% TSOT-23 - 40oC to +125oC AME431BBJETB25Z AZBww 2.5V 1.0% SOT-23 - 40oC to +125oC AME431BBJETB25Y AZBww 2.5V 1.0% TSOT-23 - 40oC to +125oC 7 AME, Inc. AME431B Adjustable Precision Shunt Regulator n Ordering Information (contd.) Part Number AME431BAJATB25 AME431BAJATB25Z AME431BAJATA25 AME431BAJATA25Z 8 Marking* AME25 431B AJATB yyww AME25 431B AJATB yyww AME25 431B AJATA yyww AME25 431B AJATA yyww Reference Voltage Accuracy Package Temp. Range 2.5V 1.0% TO92-3 - 40oC to +125oC 2.5V 1.0% TO92-3 - 40oC to +125oC 2.5V 0.5% TO92-3 - 40oC to +125oC 2.5V 0.5% TO92-3 - 40oC to +125oC AME431BAJEVA12 BAWww 1.24V 0.5% SOT-25 - 40oC to +125oC AME431BAJEVA12L BAWww 1.24V 0.5% TSOT-25 - 40oC to +125oC AME431BAJEVA12Z BAWww 1.24V 0.5% SOT-25 - 40oC to +125oC AME431BAJEVA12Y BAWww 1.24V 0.5% TSOT-25 - 40oC to +125oC AME431BAJEVB12 BAVww 1.24V 1.0% SOT-25 - 40oC to +125oC AME431BAJEVB12L BAVww 1.24V 1.0% TSOT-25 - 40oC to +125oC AME431BAJEVB12Z BAVww 1.24V 1.0% SOT-25 - 40oC to +125oC AME431BAJEVB12Y BAVww 1.24V 1.0% TSOT-25 - 40oC to +125oC AME, Inc. AME431B Adjustable Precision Shunt Regulator n Absolute Maximum Ratings Maximum Parameter Unit AME431Bxxxxx12 100 AME431Bxxxxx25 150 AME431Bxxxxx12 18 AME431Bxxxxx25 40 Cathode Current mA V Cathode Voltage Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device n Recommended Operating Conditions Parameter Supply Current Rating Unit 1 ~ 100 mA AME431Bxxxxx12 1.24 to 16 AME431Bxxxxx25 2.50 to 36 Operation Voltage Range V Ambient Temperature Range -40 to +125 o Junction Temperature -40 to +125 o C C n Thermal Information Parameter Thermal Resistance Maximum Junction Temperature Maximum Lead Temperature (10 Sec) Maximum SOT-23 325 SOT-25 325 SOT-89 180 TO-92 180 SO-8 124 Unit o C/W 150 o 300 o C C 9 AME, Inc. AME431B Adjustable Precision Shunt Regulator n Electrical Specifications (AME431Bxxxxx25) TA = 250C, IREF=10mA unless otherwise specified Test Symbol Circuit Parameter Reference Voltage 0.5% 1.0% Deviation of Reference Voltge Over Temperature 1 VREF 1 ∆VREF Test Condition Min 2.4875 VKA = VREF, IKA=10mA 0oC ~ +70oC VKA = VREF o o -40 C ~ +125 C IKA=10mA ∆VKA= Ratio of Change in Reference Voltage to the Change in Cathode Voltage 2 Reference Current 2 ∆VREF ∆VKA 10V to VREF IKA=10mA Max 2.500 2.5125 2.475 2.500 2.525 - 4.5 8 - 4.5 10 - -1.0 -2.7 Units V mV mV/V ∆VKA= 36V to 10V IKA=10mA IREF Typ R1=10KΩ, R2=∞ - -0.5 -2.0 - 0.7 4.0 µA - 0.4 1.2 µA R1=10KΩ, R2= ∞ Deviation of Reference Current Over Full Temperature Range ∆IREF 2 IKA=10mA o o TA= -40 C ~ +125 C Minimum Cathode Current for Regulation 1 IKA (MIN) VKA=VREF - 0.4 1.0 mA Off-State Cathode Current 3 IKA (OFF) VKA=36V,VREF =0V - 0.05 1.0 µA Dynamic Impendance 1 ZKA VKA = VREF , IKA=1 to 100mA F<1KHz - 0.15 0.5 Ω VIN R1 VKA IKA R3 VIN V KA VIN IKA VKA IOFF R1 IREF VKA=VREF (1+R1/R2)+IREFR1 R2 VREF VREF Figure1. Test Circuit4 for VKA=VREF 10 Figure2. Test Circuit for VKA>VREF Figure3. Test Circuit for IOFF AME, Inc. AME431B Adjustable Precision Shunt Regulator n Electrical Specifications (AME431Bxxxxx12) TA = 250C, IREF=10mA unless otherwise specified Test Symbol Circuit Parameter Reference Voltage 0.5% 1.0% Deviation of Reference Voltge Over Temperature 1 VREF 1 ∆VREF Min VKA - VREF , IKA=10mA o o -40 C ~ +85 C ∆VKA = 2 Reference Input Current 2 ∆VREF ∆VKA 5V to VREF ∆VKA = IKA=10mA 16V to 5V IREF Typ Max 1.234 1.240 1.246 1.228 1.240 1.252 0oC ~ +70oC VKA = VREF IKA=10mA Ratio of Change in Reference Voltage to the Change in Cathode Voltage Deviation of Reference Current Over Full Temperature Range Test Condition IKA=10mA R1=10KΩ, R2=∞ Units V - 2 10 - 3 10 - -0.5 -1.5 - -0.5 -1.5 - 0.15 0.4 µA - 0.1 0.4 µA mV mV/V R1=10KΩ, R2= ∞ 2 ∆IREF IKA=10mA o o TA= -40 C ~ +85 C Minimum Cathode Current for Regulation 1 IKA (MIN) VKA=VREF - 55 80 µA Off-State Cathode Current 3 IKA (OFF) VKA=18V, VREF =0V - 0.04 0.1 µA Dynamic Impendance 1 ZKA VKA = VREF , IKA=1 to 100mA F<1KHz - 0.05 0.15 Ω 11 AME, Inc. AME431B Adjustable Precision Shunt Regulator Current vs. Cathode Voltage Cathode Current vs. Cathode Voltage V KA=VREF 800 VKA=VREF T A= 25oC T A= 25oC Cathode Current (uA) Cathode Current (mA) 150 100 50 0 -50 600 400 340 200 0 -200 -100 -2 -1 0 1 2 3 -1.0 -0.5 0.0 Reference Current vs. Temperature 1.0 1.5 2.0 2.495 Reference Voltage vs. Cathode Current 1.7 2.520 1.6 2.515 Reference Voltage (V) Reference Current (uA) 0.5 Cathode Voltage (V) Cathode Voltage (V) 1.5 1.4 1.3 1.2 1.1 2.510 2.505 2.500 2.495 2.490 2.485 1.0 -45 -5 25 55 85 115 125 2.480 10 20 30 Temperature (oC) 40 50 60 70 80 90 100 110 Cathode Current (mA) Input and Output Voltage (V) Small Signal Voltage Gain vs. Frequency 5 220 4 Pulse Generator f=100KHz 3 50 Output 2 1 0 GND 0 2 Time (uS) 12 Output Input 4 6 AME, Inc. AME431B Adjustable Precision Shunt Regulator Small Signal Voltage Gain vs. Frequency 1K 60 10K 100K 1000K T A= 25oC 50 60 50 Output Av (dB) IKA= 10mA 40 40 30 30 20 20 10 10 IKA 15K 242 10uF 8.2K 0 1K 0 10K 100K GND 1000K Small Signal Frequency Reference Impedance vs. Frequency Reference Impedance (Ω) 1K IKA= 10mA Output TA= 25oC 10 IK A 50 1 0.1 1K 10K 100K GND 1000K Frequency (Hz) Stability Boundary Conditions vs. Load Capacitance 100 Cathode Current (mA) 90 80 70 A: - - - VKA=5V B: ___ VKA=10V VKA=15V: No oscillation R1(10K) 60 IKA 150 50 40 A 30 R2 20 10 0 0.01uF B 0.1uF 1uF 2uF Load Capacitance 13 AME, Inc. AME431B Adjustable Precision Shunt Regulator Reference Voltage vs. Temperature 0.25 2.510 0.20 2.505 Refer ence Voltage (V) Impedance (1mA-100mA) ohm Impedance vs. Temperature 0.15 0.10 0.05 0.00 -45 -5 25 55 85 IKA=10mA 2.500 2.495 2.490 2.485 -45 115 125 VKA= VREF -5 Delta Reference Voltage vs. Temperature 85 115 125 Off-State Current vs. Temperature -0.1 60 -0.2 Off-State Current (nA) Delta Vref/Delta VK (mV/V) 55 70 0 -0.3 -0.4 -0.5 -0.6 -0.7 -0.8 -0.9 -45 -5 25 55 85 Temperature ( o C) 14 25 Temperature (oC) Temperature (oC) 115 125 50 40 30 20 10 0 -45 -5 25 55 85 Temperature (oC) 115 125 AME, Inc. AME431B Adjustable Precision Shunt Regulator n Package Dimension TO-92-3 (bulk pack) SYMBOLS Top View Side View MILLIMETERS INCHES MIN MAX MIN MAX A 4.32 4.95 0.1701 0.1949 b 0.36 0.51 0.0142 0.0201 E 3.30 3.94 0.1299 0.1551 e 2.41 2.67 0.0949 0.1051 e1 1.14 1.40 0.0449 0.0551 L 12.70 15.49 0.5000 0.6098 R 2.16 2.41 0.0850 0.0949 W 0.41 0.56 0.0161 0.0220 D 4.45 4.95 0.1752 0.1949 Notes: 1. Package outline exclusive of any mold flashes dimension. 2. Package outline exclusive of burr dimension. 3. Lead pitch=2.54mm is bulk pack. 4. Lead pitch=5.08mm is tape pack. TO-92-3 (tape pack) SYMBOLS Top View Side View MILLIMETERS INCHES MIN MAX MIN MAX A 4.32 4.95 0.1701 0.1949 b 0.36 0.51 0.0142 0.0201 E 3.30 3.94 0.1299 0.1551 e 4.98 5.08 0.1961 0.2000 e1 2.49 2.54 0.0980 0.1000 L 12.70 15.49 0.5000 0.6098 R 2.16 2.41 0.0850 0.0949 W 0.41 0.56 0.0161 0.0220 D 4.45 4.95 0.1752 0.1949 Notes: 1. Package outline exclusive of any mold flashes. 2. Package outline exclusive of burr dimension. 3. Lead pitch=2.54mm is bulk pack. 4. Lead pitch=5.08mm is tape pack. 15 AME, Inc. AME431B Adjustable Precision Shunt Regulator n Package Dimension SOT-23 Top View Side View D C MILLIMETERS INCHES MIN MAX MIN MAX A 1.00 1.40 0.0394 0.0551 A1 0.00 0.15 0.0000 0.0059 b 0.35 0.50 0.0138 0.0197 C 0.09 0.25 0.0035 0.0098 D 2.70 3.10 0.1063 0.1220 E 1.40 1.80 0.0551 0.0709 E H L SYMBOLS e θ1 1.90 BSC e Front View H 2.40 A 0o 0.09449 0.11811 0.0138BSC 10o 0o 10o A1 b 3.00 0.35BSC L ?1 0.0748 BSC TSOT-23 Top View Side View D C SYMBOLS MILLIMETERS INCHES MAX MIN MAX A+A1 0.80 1.30 0.0315 0.0512 b 0.35 0.50 0.0138 0.0197 C 0.08 0.25 0.0031 0.0098 D 2.70 3.10 0.1063 0.1220 E 1.20 1.80 0.0472 0.0709 E H L MIN e θ1 H Front View A 16 2.40 θ1 0.0748 BSC 3.00 0.35BSC L A1 b 1.90 BSC e 0 o 10 0.09449 0.11811 0.0138BSC o 0 o 10 o AME, Inc. AME431B Adjustable Precision Shunt Regulator n Package Dimension SOT-89 Top View Side View SYMBOLS D D1 A MILLIMETERS MIN MAX 1.39 1.60 INCHES MIN MAX 0.05472 0.06299 H POLISH A1 0.8REF 0.0315REF 0.35 0.44 0.01378 0.01732 D 4.39 4.60 0.17283 D1 1.35 1.83 0.05315 0.07205 E 2.28 3.60 0.08976 0.14173 A1 E C S1 C e Front View 0.1811 e 3.00REF 0.1181REF H 0.70REF 0.0276REF S1 1.50REF 0.0590REF MILLIMETERS INCHES MATTE FINISH A POLISH SO-8 Top View Side View C E D L θ Front View e A1 MIN MAX MIN MAX A 5.58 7.49 0.2197 0.2949 C 3.55 4.83 0.1398 0.1900 D 0.50 1.40 0.0197 0.0550 E 0.30 1.15 0.0118 0.0453 G 9.65 10.67 0.3799 0.4200 I 3.53 4.09 0.1390 0.1610 K 0.50 1.15 0.0197 0.0453 M 1.14 1.78 0.0449 0.0700 N 2.28 2.80 0.0898 0.1102 O 12.70 14.74 0.5000 0.5803 P 14.22 16.51 0.5600 0.6500 A A2 7o(4X) SYMBOLS B 17 AME, Inc. AME431B Adjustable Precision Shunt Regulator n Package Dimension SOT-25 Top View Side View D SYMBOLS MILLIMETERS L MIN 1.20REF E H A θ1 S1 0.0472REF 0.15 0.0000 0.0059 b 0.30 0.55 0.0118 0.0217 D 2.70 3.10 0.1063 0.1220 E 1.40 1.80 0.0551 0.0709 1.90 BSC 2.60 θ1 3.00 0 o 10 0.10236 0.11811 0.0146BSC o 0o 10o 0.95BSC 0.0374BSC MILLIMETERS INCHES A1 S1 0.07480 BSC 0.37BSC L A MAX 0.00 H Front View MIN A1 e e MAX INCHES b TSOT-25 Top View Side View E H L D θ1 S1 SYMBOLS MIN MAX MIN MAX A+A1 0.90 1.25 0.0354 0.0492 b 0.30 0.50 0.0118 0.0197 D 2.70 3.10 0.1063 0.1220 E 1.40 1.80 0.0551 0.0709 H e 1.90 BSC e 2.40 θ1 A A1 b 18 S1 3.00 0.35BSC L Front View 0.07480 BSC 0 o 10 0.95BSC 0.09449 0.11811 0.0138BSC o 0o 10o 0.0374BSC www.ame.com.tw E-Mail: [email protected] Life Support Policy: These products of AME, Inc. are not authorized for use as critical components in life-support devices or systems, without the express written approval of the president of AME, Inc. AME, Inc. reserves the right to make changes in the circuitry and specifications of its devices and advises its customers to obtain the latest version of relevant information. AME, Inc. , December 2004 Document: BCD-DS431B-D Corporate Headquarter U.S.A.(Subsidiary) AME, Inc. Analog Microelectronics, Inc. 2F, 302 Rui-Guang Road, Nei-Hu District Taipei 114, Taiwan. Tel: 886 2 2627-8687 Fax: 886 2 2659-2989 3100 De La Cruz Blvd., Suite 201 Santa Clara, CA. 95054-2046 Tel : (408) 988-2388 Fax: (408) 988-2489