AME Adjustable Precision Shunt Regulator AME431B-2.5V 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. n Functional Block Diagram Cathode REF The reference is set to 2.5V for AME431Bxxxxx25. The output voltage can be set to 2.5V 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 which allows operation over a wide range of -40oC t o Anode +125oC. n Features n Applications l High Stability under Capacitive Load l Adjustable Power Supplies l Low Temperature Deviation: 4.5mV Typical l Linear Regulators l Low Equivalent Full-Range Temperature Coefficient l Battery Operated Computer 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 7 Packages: TO-92-3, SOT-23, SOT-89, SOP-8, SOT-25, TSOT-23 and TSOT-25 l Portable Electronics l l l l l Instrumentation Switching Power Supply Mother Board LCD Monitor Note Book Computer l All AME’ s Lead Free Products Meet RoHS Standards Rev.B.04 1 AME Adjustable Precision Shunt Regulator AME431B-2.5V 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 Rev.B.04 AME Adjustable Precision Shunt Regulator AME431B-2.5V 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 Rev.B.04 3 AME Adjustable Precision Shunt Regulator AME431B-2.5V n Pin Configuration SOT-23/TSOT-23 Top View 3 SOT-23/TSOT-23 Top View 3 AME431BAJETXXXX AME431BBJETXXXX 1. Cathode 1. REF 2. REF AME431B 3. Anode 2. Cathode AME431B * Die Attach: 1 2 Conductive Epoxy SOT-89 Front View 2 3 2 Conductive Epoxy 5 4 AME431BAJEVXXXX 1. REF 1. NC 2. Anode 2. NC 3. Cathode 1 * Die Attach: 1 SOT-25/TSOT-25 Top View AME431BAJFTXXXX AME431B 3. Anode AME431B 3. Cathode 4. REF * Die Attach: Conductive Epoxy 5. Andode 1 2 3 * Die Attach: Non-Conductive Epoxy SOP-8 Top View 8 7 6 TO-92-3 Top View 5 AME431BAJATXXXX AME431BAJHAXXXX 1. REF 1. Cathode 2. Anode AME431B 3. Cathode 3. Anode AME431B 4. NC * Die Attach: 5. NC Conductive Epoxy 6. Anode 1 2 3 4 2. Anode 7. Anode 8. REF * Die Attach: 1 2 3 Conductive Epoxy 4 Rev.B.04 AME Adjustable Precision Shunt Regulator AME431B-2.5V n Ordering Information AME431B x x x x x xx x - x Special Feature2 Special Feature1 Reference Voltage Accuracy Number of Pins Package Type Operating Ambient Temperature Range Pin Configuration Pin Configuration A (SOT-23) (TSOT-23) B (SOT-23) (TSOT-23) A (SOT-89) A (TO-92-3) A (SOP-8) A (SOT-25) (TSOT-25) 1. Cathode 2. REF 3. Anode Operating Ambient Temperature Range J: -40OC to +125OC Package Type A: TO-92 E: SOT-2X F: SOT-89 H: SOP Number of Pins A: 8 T: 3 V: 5 Accuracy A: 0.5% B: 1.0% Reference Voltage 25: 2.5V Special Feature1 Y: Lead free & Low profile Z: Lead free Special Feature2 (For TO-92 Package Only) N/A: 1: Package Taping Bulk Lead Pitch 5.08mm 2.54mm 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 Rev.B.04 5 AME Adjustable Precision Shunt Regulator AME431B-2.5V n Ordering Information Reference Operating Ambient Accuracy Package Voltage Temperature Range Part Number Marking* AME431BAJETA25Z BAFww 2.5V 0.5% SOT-23 - 40oC to +125oC AME431BAJETA25Y BAFww 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 AME431BAJETB25Z AZAww 2.5V 1.0% SOT-23 - 40oC to +125oC AME431BAJETB25Y AZAww 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 2.5V 0.5% SOT-89 - 40oC to +125oC 2.5V 1.0% SOT-89 - 40oC to +125oC 2.5V 1.0% SOP-8 - 40oC to +125oC 2.5V 1.0% TO-92-3 - 40oC to +125oC 2.5V 1.0% TO-92-3 - 40oC to +125oC 2.5V 0.5% TO-92-3 - 40oC to +125oC 2.5V 0.5% TO-92-3 - 40oC to +125oC AME431BAJFTA25Z AME431BAJFTB25Z AME431BAJHAB25Z AME431BAJATB25Z AME431BAJATB25Z-1 AME431BAJATA25Z AME431BAJATA25Z-1 A431B BKXww A431B BJBww 431B BJCww AME25 431B AJATB yyww AME25 431B AJATB yyww AME25 431B AJATA yyww AME25 431B AJATA yyww Note: yyww & ww represents the date code and pls refer to Date Code Rule on Package Dimension. * A line on top of the first letter represents lead free plating such as BAFww. Please consult AME sales office or authorized Rep./Distributor for output voltage and package type availability. 6 Rev.B.04 AME Adjustable Precision Shunt Regulator AME431B-2.5V n Absolute Maximum Ratings Maximum Unit Cathode Current 150 mA Cathode Voltage 40 V Parameter Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device n Recommended Operating Conditions Rating Unit Supply Current 1 to 100 mA Operation Voltage Range 2.5 to 36 V Parameter Ambient Temperature Range TA -40 to +125 o Junction Temperature Range TJ -40 to +125 o Storage Temperature Range TSTG -65 to +150 o Rev.B.04 C C C 7 AME Adjustable Precision Shunt Regulator AME431B-2.5V n Thermal Information Parameter Package Die Attach Symbol SOT-23** TSOT-23 SOT-89* Thermal Resistance (Junction to Case) 40 Conductive Epoxy θJC SOP-8** Thermal Resistance (Junction to Ambient) Non-Conductive Epoxy 140 o C/W 260 180 Conductive Epoxy θJA TO-92-3 SOP-8 SOT-25 TSOT-25 Internal Power Dissipation Non-Conductive Epoxy 280 400 550 Conductive Epoxy TO-92-3 PD SOP-8 SOT-25 TSOT-25 150 150 SOT-23 TSOT-23 SOT-89 80 60 SOT-23 TSOT-23 SOT-89 Unit 81 TO-92-3** SOT-25** TSOT-25 Maximum 625 mW 810 Non-Conductive Epoxy Solder Iron (10 Sec)*** 400 350 o C * Measure θJC on backside center of tab. ** Measure θJC on center of molding compound if IC has no tab. *** MIL-STD-202G 210F 8 Rev.B.04 AME Adjustable Precision Shunt Regulator AME431B-2.5V n Electrical Specifications (AME431Bxxxxx25) TA = 250C, IREF = 10mA unless otherwise specified Test Symbol Circuit Parameter Test Condition 0.5% Reference Voltage 1.0% Deviation of Reference Voltage Over Temperature 1 VREF 1 ∆VREF V KA = V REF, IKA = 10mA 0oC to 70oC VKA = V REF o IKA = 10mA o -40 C to +125 C ∆V KA = Ratio of Change in Reference Voltage to the Change in Cathode Voltage 2 Reference Current 2 ∆VREF ∆V KA 10V to VREF IKA = 10mA R1 = 10KΩ, R2 = ∞ ∆IREF 2 IKA = 10mA o Max 2.4875 2.50 2.5125 2.4750 2.50 2.5250 - 4.5 8 - 4.5 18 - -1.0 -2.7 Units V mV - -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 Typ mV/V ∆V KA = 36V to 10V IKA = 10mA IREF Min o TA = -40 C to +125 C Minimum Cathode Current for Regulation 1 IKA (MIN) V KA = V REF - 0.4 1.0 mA Off-State Cathode Current 3 IKA (OFF) V KA = 36V, VREF = 0V - 0.05 1.0 µA Dynamic Impendance 1 ZKA VKA = V REF , IKA = 1 to 100mA F<1KHz - 0.15 0.5 Ω R1 VIN VKA IKA R3 VIN V KA VIN IKA VKA IOFF R1 IREF VKA=VREF (1+R1/R2)+IREFR1 R2 VREF VREF Figure1. Test Circuit for VKA=VREF Rev.B.04 Figure2. Test Circuit for VKA>VREF Figure3. Test Circuit for IOFF 9 AME Adjustable Precision Shunt Regulator AME431B-2.5V Current vs. Cathode Voltage Cathode Current vs. Cathode Voltage T A= VKA=VREF T A= 25oC 800 VKA=VREF 25oC Cathode Current (µA) 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 1.0 1.5 2.0 2.495 Reference Voltage vs. Cathode Current 2.520 1.6 2.515 Reference Voltage (V) Reference Current (µA) Reference Current vs. Temperature 1.7 1.5 1.4 1.3 1.2 1.1 1.0 -45 0.5 Cathode Voltage (V) Cathode Voltage (V) 2.510 2.505 2.500 2.495 2.490 2.485 -5 25 55 85 115 125 2.480 10 20 30 o Temperature ( C) 40 50 60 70 80 90 100 110 Cathode Current (mA) 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 15K IKA 242 10uF 8.2K 0 1K 0 10K 100K 1000K GND Small Signal Frequency 10 Rev.B.04 AME Adjustable Precision Shunt Regulator AME431B-2.5V Input and Output Voltage (V) Small Signal Voltage Gain vs. Frequency 5 220 Input Output 4 V REF = 2.5V Pulse Generator f=100KHz 3 Output 2 50 1 GND 0 0 2 4 6 Time (µS) 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) IKA 150 60 50 40 A 30 R2 20 10 0 0.01uF B 0.1uF 1uF 2uF Load Capacitance Rev.B.04 11 AME Adjustable Precision Shunt Regulator AME431B-2.5V Off-State Current vs. Temperature Delta Reference Voltage vs. Temperature 2.0 VREF = 2.5V -0.2 Off-State Current (µA) Delta Vref/Delta VK(mV/V) 0 -0.4 -0.6 -0.8 -1 -1.2 -1.4 -45 1.8 VKA= 36V 1.6 VREF = 0 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 -25 0 25 55 70 100 -40 125 -20 Impedance vs. Temperature Reference Voltage (V) Impedance (1mA-100mA) ohm 40 80 60 100 120 2.510 0.20 0.15 0.10 0.05 -5 25 55 85 o Temperature ( C) 12 20 Reference Voltage vs. Temperature 0.25 0.00 -45 0 Temperature (oC) Temperature (oC) 115 125 VKA= VREF 2.505 IKA=10mA 2.500 2.495 2.490 2.485 -45 -5 25 55 85 115 125 Temperature (oC) Rev.B.04 AME Adjustable Precision Shunt Regulator AME431B-2.5V n Date Code Rule Marking Date Code Year A A A W W xxx0 A A A W W xxx1 A A A W W xxx2 A A A W W xxx3 A A A W W xxx4 A A A W W xxx5 A A A W W xxx6 A A A W W xxx7 A A A W W xxx8 A A A W W xxx9 n Tape and Reel Dimension SOT-25 P W AME AME PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size Rev.B.04 Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size SOT-25 8.0±0.1 mm 4.0±0.1 mm 3000pcs 180±1 mm 13 AME Adjustable Precision Shunt Regulator AME431B-2.5V n Tape and Reel Dimension TSOT-25 P W AME AME PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size TSOT-25 8.0±0.1 mm 4.0±0.1 mm 3000pcs 180±1 mm SOT-89 P W AME AME PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size 14 Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size SOT-89 12.0±0.1 mm 4.0±0.1 mm 1000pcs 180±1 mm Rev.B.04 AME Adjustable Precision Shunt Regulator AME431B-2.5V n Tape and Reel Dimension SOT-23 P W AME AME PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size SOT-23 8.0±0.1 mm 4.0±0.1 mm 3000pcs 180±1 mm TSOT-23 P W AME AME PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size Rev.B.04 Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size TSOT-23 8.0±0.1 mm 4.0±0.1 mm 3000pcs 180±1 mm 15 AME Adjustable Precision Shunt Regulator AME431B-2.5V n Tape and Reel Dimension SOP-8 P PIN 1 W AME AME Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size SOP-8 12.0±0.1 mm 4.0±0.1 mm 2500pcs 330±1 mm TO-92-3 AME AME PIN 1 W P Carrier Tape, Number of Components Per Reel and Reel Size Package TO-92-3 16 Carrier Width (W) +1.0 mm -0.5 18.0 Pitch (P) Part Per Full Reel Reel Size 12.7±0.2 mm 2000pcs N/A Rev.B.04 AME Adjustable Precision Shunt Regulator AME431B-2.5V n Package Dimension TO-92-3 (bulk pack) SYMBOLS Top View A L e e1 w PIN 1 D Side View A R INCHES MIN MAX MIN MAX 2.80 4.95 0.1102 0.1949 b 0.40REF 0.0157REF E 3.94REF 0.1551REF e 2.54REF 0.1000REF e1 1.27REF 0.0500REF L E-PIN C 1/16 MILLIMETERS 12.70 15.49 2.29 R 0.5000 0.6098 0.0902 W 0.35 0.76 0.0138 0.0299 D 3.80 4.95 0.1496 0.1949 b 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. E TO-92-3 (tape pack) SYMBOLS Top View L e e1 w A b PIN 1 D E MILLIMETERS INCHES MIN MAX MIN MAX 2.80 4.95 0.1102 0.1949 0.40REF 2.40 3.94 0.0157REF 0.0945 0.1551 e 5.08REF 0.2REF e1 2.54REF 0.1REF E-PIN C 1/16 L Side View 12.70 R A R b 15.49 2.00 0.5000 0.6098 0.0787 W 0.35 0.76 0.0138 0.0299 D 3.80 4.95 0.1496 0.1949 E 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. Rev.B.04 17 AME Adjustable Precision Shunt Regulator AME431B-2.5V n Package Dimension SOT-23 Top View Side View D SYMBOLS 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 D 2.70 3.10 0.1063 0.1220 E 1.40 1.80 0.0551 0.0709 H E L e e H L Front View INCHES MIN θ1 PIN 1 MILLIMETERS 2.40 3.00 0.35BSC 0o 10o 0.0748 BSC 0.09449 0.11811 0.0138BSC 0o 10o A θ1 1.90 BSC A1 b TSOT-23 Top View Side View D θ1 E H SYMBOLS L PIN 1 e INCHES MIN MAX MIN MAX A+A1 0.80 1.30 0.0315 0.0512 b 0.35 0.50 0.0138 0.0197 D 2.70 3.10 0.1063 0.1220 E 1.20 1.80 0.0472 0.0709 e H L Front View MILLIMETERS 2.40 3.00 0.35BSC 0o 10 o 0.0748 BSC 0.09449 0.11811 0.0138BSC 0o 10o b 18 A1 A θ1 1.90 BSC Rev.B.04 AME Adjustable Precision Shunt Regulator AME431B-2.5V n Package Dimension SOT-89 Side View H Top View D D1 SYMBOLS A E A1 A1 e Bottom View INCHES MIN MAX MIN MAX 1.39 1.60 0.05472 0.06299 0.8 REF 0.03150 REF C 0.35 0.44 0.01378 0.01732 10' D 4.39 4.60 0.17283 0.18110 C D1 1.35 1.83 0.05315 0.07205 E 2.28 2.60 0.08976 0.10236 I 0.36 0.56 0.01417 0.02204 3' PIN 1 MILLIMETERS Front View D2 A MATTE FINISH E2 I POLISH e 3.00 REF 0.11811 REF H 0.70 REF 0.02756 REF S1 1.50 REF 0.05906 REF E2 2.05 2.60 0.08071 0.10236 D2 1.50 1.85 0.05905 0.07283 S1 Rev.B.04 19 AME Adjustable Precision Shunt Regulator AME431B-2.5V n Package Dimension SOP-8 Side View Top View C SYMBOLS E H L D θ Front View MAX MIN MAX A 1.35 1.75 0.05315 0.0689 A1 0.10 0.30 0.00394 0.01181 A A2 A1 e 1.473 REF 0.33 0.51 0.01299 0.02008 C 0.19 0.25 0.00748 0.00984 D 4.80 5.33 0.18898 0.20984 E 3.80 4.00 0.14961 0.15748 1.27 BSC 0.05000 BSC L 0.40 1.27 0.01575 0.05000 H 5.80 6.30 0.22835 0.24803 y - 0.10 θ B 0.05799 REF B e 7o(4X) INCHES MIN A2 PIN 1 MILLIMETERS 0 o 8 o 0 0.00394 o 8 o SOT-25 Top View Side View D θ1 SYMBOLS MILLIMETERS MIN 1.20REF E H A PIN 1 L S1 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 θ1 1.90 BSC 2.60 S1 0.07480 BSC 3.00 0.37BSC 0 o 10 0.95BSC 0.10236 0.11811 0.0146BSC o 0o 10o 0.0374BSC A1 A 20 0.0472REF 0.15 L b MAX 0.00 H Front View MIN A1 e e MAX INCHES Rev.B.04 AME Adjustable Precision Shunt Regulator AME431B-2.5V n Package Dimension TSOT-25 Top View Side View D E H θ1 SYMBOLS MILLIMETERS 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 1.90 BSC e PIN 1 L S1 H 2.40 θ1 S1 3.00 0 o 10 0.95BSC 0.09449 0.11811 0.0138BSC o 0o 10o 0.0374BSC b Rev.B.04 A1 A Front View 0.07480 BSC 0.35BSC L e INCHES 21 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. , November 2008 Document: ORT-DS431B-B.04 Corporate Headquarter AME, Inc. 2F, 302 Rui-Guang Road, Nei-Hu District Taipei 114, Taiwan. Tel: 886 2 2627-8687 Fax: 886 2 2659-2989