Product Change Notices

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1 Product Change Notices PCN No.: Date: 01/31/2011 This is to inform you that datasheet has been changed from Rev.B.04 to. This notification is for your information and concurrence. If you require data or samples to qualify this change, please contact, Inc. within 90 calendar days of receiving of this notification. If we do not receive any response from you within 30 calendar days from the date of receiving of this notification, we will consider that you have accepted this PCN. If you have any questions concerning this change, please contact: PCN Originator: Name: Bill Chou Expected 1st Device Shipment Date: 01/31/2011 Earliest Year/Work Week of Changed Product: N/A Description of Change: Electrical Specifications on Page 9 From Min Typ. Max To Min Typ. Max Reason for Change: To comply part real product performance. QPM018B-B

2 Product Part Number: s Part. No. 431BAJATB25Z 431BBJETB25Z H.H. Part. No R B-0000 QPM018B-B

3 General Description Functional Block Diagram The 431B 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. The reference is set to 2.5V for 431Bxxxxx25. The output voltage can be set to 2.5V to 36V for V REF =2.5V part type with two external resistors. REF Cathode The 431B precision reference is offered in two reference tolerance: 0.5% and 1.0% V REF The 5 main packages have low thermal impendance which allows operation over a wide range of -40 o C to +125 o C. Anode Features High Stability under Capacitive Load Low Temperature Deviation: 4.5mV Typical Low Equivalent Full-Range Temperature Coefficient with 20PPM/ o C Typical Low Dynamic Output Resistance: 0.2Ω Typical Sink Current Capacity from 1mA to 100mA Low Output Noise Available in 7 Packages: TO-92-3, SOT-23, SOT-89, SOP-8, SOT-25, TSOT-23 and TSOT-25 All s Lead Free Products Meet RoHS Standards Applications Adjustable Power Supplies Linear Regulators Battery Operated Computer Portable Electronics Instrumentation Switching Power Supply Mother Board LCD Monitor Note Book Computer 1

4 Typical Applications R3 V IN V OUT R1 V O =(1+R1/R2) V REF V REF 431B R2 High Current V IN R1 V OUT R2 R4 V O =(1+R2/R3) V REF V REF 431B R3 Current Source or Current Limit V IN R2 I OUT R1 I OUT =V REF /R2+I KA 431B 2

5 Typical Applications (contd.) Precision 5V 1.5A Regulator V IN R1 8.2K 1117 Adjust R2 250 V OUT 5V, 1.5A 431B R3 250 Precision 5V 1.5A Regulator C1 R2 680 R3 R4 V OUT R5 R1 COMP PWM Controller VFB U2 C Q1 431B R6 PS521 3

Pin Configuration SOT-23/TSOT-23 SOT-23/TSOT-23 3 431B 431BAJETXXXX 1. Cathode 2. REF 3. Anode 3 431B 431BBJETXXXX 1. REF 2. Cathode 3.

6 Pin Configuration SOT-23/TSOT-23 SOT-23/TSOT B 431BAJETXXXX 1. Cathode 2. REF 3. Anode 3 431B 431BBJETXXXX 1. REF 2. Cathode 3. Anode 1 2 * Die Attach: Conductive Epoxy 1 2 * Die Attach: Conductive Epoxy SOT-89 Front View SOT-25/TSOT B BAJFTXXXX 1. REF 2. Anode 3. Cathode * Die Attach: Conductive Epoxy B BAJEVXXXX 1. NC 2. NC 3. Cathode 4. REF 5. Andode * Die Attach: Non-Conductive Epoxy 8 SOP B BAJHAXXXX 1. Cathode 2. Anode 3. Anode 4. NC 5. NC 6. Anode 7. Anode 8. REF TO B 431BAJATXXXX 1. REF 2. Anode 3. Cathode * Die Attach: Conductive Epoxy * Die Attach: Conductive Epoxy 4

7 Ordering Information 431B 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 Package Lead Pitch A 1. Cathode J: -40 O C to +125 O C A: TO-92 A: 8 A: 0.5% 25: 2.5V Y: Lead free & N/A: Taping 5.08mm (SOT-23) 2. REF E: SOT-2X T: 3 B: 1.0% Low profile 1: Bulk 2.54mm (TSOT-23) 3. Anode F: SOT-89 V: 5 Z: Lead free H: SOP B 1. REF (SOT-23) 2. Cathode (TSOT-23) 3. Anode A (SOT-89) 1. REF 2. Anode 3. Cathode A 1. REF (TO-92-3) 2. Anode 3. Cathode A (SOP-8) 1. Cathode 2. Anode 3. Anode 4. NC 5. NC 6. Anode 7. Anode 8. REF A 1. NC (SOT-25) 2. NC (TSOT-25) 3. Cathode 4. REF 5. Anode Operating Ambient Temperature Range Package Type Number of Pins Accuracy Reference Voltage Special Feature1 Special Feature2 (For TO-92 Package Only) 5

8 Ordering Information Part Number Marking* Reference Voltage Accuracy Package Operating Ambient Temperature Range 431BAJETA25Z BAFww 2.5V 0.5% SOT o C to +125 o C 431BAJETA25Y BAFww 2.5V 0.5% TSOT o C to +125 o C 431BBJETA25Z BAGww 2.5V 0.5% SOT o C to +125 o C 431BBJETA25Y BAGww 2.5V 0.5% TSOT o C to +125 o C 431BAJETB25Z AZAww 2.5V 1.0% SOT o C to +125 o C 431BAJETB25Y AZAww 2.5V 1.0% TSOT o C to +125 o C 431BBJETB25Z AZBww 2.5V 1.0% SOT o C to +125 o C 431BBJETB25Y AZBww 2.5V 1.0% TSOT o C to +125 o C 431BAJFTA25Z 431BAJFTB25Z 431BAJHAB25Z 431BAJATB25Z 431BAJATB25Z-1 431BAJATA25Z 431BAJATA25Z-1 A431B BKXww A431B BJBww 431B BJCww B AJATB yyww B AJATB yyww B AJATA yyww B AJATA yyww 2.5V 0.5% SOT o C to +125 o C 2.5V 1.0% SOT o C to +125 o C 2.5V 1.0% SOP-8-40 o C to +125 o C 2.5V 1.0% TO o C to +125 o C 2.5V 1.0% TO o C to +125 o C 2.5V 0.5% TO o C to +125 o C 2.5V 0.5% TO o C to +125 o C 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 sales office or authorized Rep./Distributor for output voltage and package type availability. 6

9 Absolute Maximum Ratings Cathode Current Cathode Voltage Parameter Maximum Unit ma V Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device Recommended Operating Conditions Supply Current Parameter Operation Voltage Range Rating 1 to to 36 Unit ma V Ambient Temperature Range T A -40 to +125 o C Junction Temperature Range T J -40 to +125 o C Storage Temperature Range T STG -65 to +150 o C 7

10 Thermal Information Parameter Package Die Attach Symbol Maximum Unit Thermal Resistance (Junction to Case) Thermal Resistance (Junction to Ambient) Internal Power Dissipation SOT-23** TSOT-23 SOT-89* Conductive Epoxy 40 TO-92-3** 80 SOP-8** 60 SOT-25** TSOT-25 SOT-23 TSOT-23 Non-Conductive Epoxy SOT-89 Conductive Epoxy 180 TO SOP SOT-25 TSOT-25 SOT-23 TSOT-23 Non-Conductive Epoxy SOT-89 Conductive Epoxy 550 TO SOP SOT-25 TSOT-25 Non-Conductive Epoxy Solder Iron (10 Sec)*** 350 o C * Measure θ JC on backside center of tab. ** Measure θ JC on center of molding compound if IC has no tab. *** MIL-STD-202G 210F θ JC θ JA P D 400 o C / W mw 8

11 Electrical Specifications (431Bxxxxx25) T A = 25 0 C, I REF = 10mA unless otherwise specified Parameter Reference Voltage Test Circuit Symbol Test Condition Min Typ Max Units 0.5% V REF V KA = V REF, I KA = 10mA 1.0% V Deviation of Reference Voltage Over Temperature 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 1 V REF V KA = V REF 0 o C to 125 o C ppm/ O C IKA = 10mA 2 V KA = 10V to V REF V KA = 36V to 10V I REF I KA = 10mA R1 = 10K Ω, R2 = µa R1 = 10K Ω, R2 = 2 I REF I KA = 10mA µa 1 V REF V KA I KA (MIN) IKA = 10mA TA = -40 o C to +125 o C VKA = VREF mv/v ma Off-State Cathode Current 3 I KA (OFF) V KA = 36V, V REF = 0V µa Dynamic Impendance V KA = V REF, I KA = 1 to 100mA 1 Z KA Ω F<1KHz V IN R1 V KA V IN R3 V KA V IN V KA I KA I OFF I KA R1 I REF V KA =V REF (1+R1/R2)+I REF R1 R2 V REF V REF Figure1. Test Circuit for V KA =V REF Figure2. Test Circuit for V KA >V REF Figure3. Test Circuit for I OFF 9

12 Cathode Current vs. Cathode Voltage Current vs. Cathode Voltage Cathode Current (ma) V KA =V REF T A = 25 o C Cathode Current (ma) V KA =V REF T A = 25 o C Cathode Voltage (V) Cathode Voltage (V) Reference Current (ma) Reference Current vs. Temperature Reference Voltage (V) Reference Voltage vs. Cathode Current Temperature ( o C) Cathode Current (ma) 1K 60 10K 100K 1000K Small Signal Voltage Gain vs. Frequency T A = 25 o C I KA = 10mA K I KA 242 Output Av (db) uF K K 10K 100K 1000K Small Signal Frequency 0 GND 10

13 Small Signal Voltage Gain vs. Frequency Input and Output Voltage (V) Input V REF = 2.5V Output Time (ms) Pulse Generator f=100khz Output GND Reference Impedance vs. Frequency 1K Reference Impedance (W) 10 1 I KA = 10mA T A = 25 o C 50 I KA Output 0.1 1K 10K 100K 1000K Frequency (Hz) GND Stability Boundary Conditions vs. Load Capacitance 100 Cathode Current (ma) A: V KA =5V B: V KA =10V VKA=15V: No oscillation A B R1(10K) R2 I KA uF 0.1uF 1uF 2uF Load Capacitance 11

14 Delta Reference Voltage vs. Temperature Off-State Current vs. Temperature Delta Vref/Delta VK (mv/v) V REF = 2.5V Off-State Current (ma) V KA = 36V V REF = Temperature( O C) Temperature ( o C) Impedance vs. Temperature Reference Voltage vs. Temperature Impedance (1mA-100mA) ohm Temperature ( o C) Reference Voltage(V) V KA = V REF I KA =10mA Temperature ( O C) 12

15 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 Tape and Reel Dimension SOT-25 P W Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size SOT ±0.1 mm 4.0±0.1 mm 3000pcs 180±1 mm 13

16 Tape and Reel Dimension TSOT-25 P W Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size TSOT ±0.1 mm 4.0±0.1 mm 3000pcs 180±1 mm SOT-89 P W Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size SOT ±0.1 mm 4.0±0.1 mm 1000pcs 180±1 mm 14

17 Tape and Reel Dimension SOT-23 P W Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size SOT ±0.1 mm 4.0±0.1 mm 3000pcs 180±1 mm TSOT-23 P W Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size TSOT ±0.1 mm 4.0±0.1 mm 3000pcs 180±1 mm 15

18 Tape and Reel Dimension SOP-8 P W Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size SOP ±0.1 mm 4.0±0.1 mm 2500pcs 330±1 mm TO-92-3 W P Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size TO ±0.2 mm 2000pcs N/A mm 16

19 Package Dimension TO-92-3 (bulk pack) L SYMBOLS MIN MAX MIN MAX A b MILLIMETERS 0.40REF INCHES REF e e1 w D E e e1 3.94REF 2.54REF 1.27REF REF REF REF b Side View A E-PIN C 1/16 R E L R W D 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) L SYMBOLS MILLIMETERS INCHES MIN MAX MIN MAX A e e1 w D b E e 0.40REF 5.08REF REF 0.2REF b Side View A E-PIN C 1/16 R E e1 L R 2.54REF REF W D 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. 17

20 Package Dimension SOT-23 D Side View MILLIMETERS INCHES SYMBOLS MIN MAX MIN MAX A A E H b D e L E e 1.90 BSC BSC H Front View L 0.35BSC BSC q1 0 o 10 o 0 o 10 o A b A1 TSOT-23 Side View D SYMBOLS MILLIMETERS INCHES MIN MAX MIN MAX A+A b E H D E e L e 1.90 BSC BSC H Front View L 0.35BSC BSC q1 0 o 10 o 0 o 10 o A b A1 18

21 Package Dimension SOT-89 D D1 E H Side View SYMBOLS MILLIMETERS INCHES MIN MAX MIN MAX A A REF REF 3' C e A1 10' C D D E Bottom View D2 Front View I e 3.00 REF REF MATTE FINISH H 0.70 REF REF E2 I A POLISH S REF REF E D S1 19

22 Package Dimension SOP-8 Side View C SYMBOLS MILLIMETERS INCHES MIN MAX MIN MAX A H E A A REF REF B D L C D Front View 7 o (4X) E e 1.27 BSC BSC L A2 A H B e A1 y q 0 o 8 o 0 o 8 o SOT-25 Side View D SYMBOLS MILLIMETERS INCHES MIN MAX MIN MAX A 1.20REF REF H E A b S1 e L D E e 1.90 BSC BSC H Front View A L 0.37BSC BSC q1 0 o 10 o 0 o 10 o S BSC BSC b A1 20

23 Package Dimension TSOT-25 Side View D SYMBOLS MILLIMETERS INCHES MIN MAX MIN MAX A+A b H E D E e 1.90 BSC BSC S1 e Front View L H L 0.35BSC BSC q1 0 o 10 o 0 o 10 o S BSC BSC A b A1 21

24 Life Support Policy: These products of, Inc. are not authorized for use as critical components in life-support devices or systems, without the express written approval of the president of, Inc., 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. Corporate Headquarter, Inc. 2F, 302 Rui-Guang Road, Nei-Hu District Taipei 114, Taiwan. Tel: Fax: , Inc., January 2011 Document: ORT-DS431B-C.01

AME. Shunt Bandgap Voltage Reference. General Description. Functional Block Diagram. Features. Typical Application. Applications

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