ADJUSTABLE PRECISION SHUNT REGULATORS General Description. Features. Applications

Transcription

1 General Description The series ICs are three-terminal adjustable shunt regulators with guaranteed thermal stability over a full operation range. These ICs feature sharp turn-on characteristics, low temperature coefficient and low output impedance, which make them ideal substitutes for Zener diodes in applications such as switching power supply, charger and other adjustable regulators. The series ICs contain two voltage types, -A for 40V and -B for 20V. The output voltage of both types can be set to any value between V REF (2.5V) and the corresponding maximum cathode voltage. The precision reference is offered in two bandgap tolerance: 0.4% and 0.8%. These ICs are available in 5 Packages: TO-92, SOT-23-3, SOT-23-5, SOT-89 and SOIC-8. Features Programmable Precise Output Voltage from 2.5V to 36V or 18V Very Accurate Reference Voltage: 0.15% Typical 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 100 ma Low Output Noise Wide Operating Range of -40 to 125 o C Applications Charger Voltage Adapter Switching Power Supply Graphic Card Precision Voltage Reference SOIC-8 SOT-89 TO-92 SOT-23-3 SOT-23-5 Figure 1. Package Types of 1

2 Pin Configuration M Package (SOIC-8) N Package (SOT-23-3) ANODE R Package (SOT-89) CATHODE ANODE ANODE REF ANODE ANODE NC 4 5 NC REF CATHODE REF ANODE CATHODE Z Package (TO-92) K Package (SOT-23-5) 3 CATHODE NC 1 5 ANODE 2 ANODE NC 2 1 REF CATHODE 3 4 REF Figure 2. Pin Configuration of (Top View) Functional Block Diagram CATHODE REF + - V REF ANODE Figure 3. Functional Block Diagram of 2

3 Ordering Information - Circuit Type Bandage Tolerance A: 0.4% B: 0.8% Package M: SOIC-8 Z: TO-92 N: SOT-23-3 K: SOT-23-5 R: SOT-89 E1: Lead-Free Blank: Tin Lead TR: Tape and Reel or Ammo Blank: Tube or Bulk A: (40V) B: (20V) 40V Products Package SOT-23-3 SOT-23-5 TO-92 SOIC-8 SOT-89 Temperature Range -40 to 125 o C -40 to 125 o C -40 to 125 o C -40 to 125 o C -40 to 125 o C Voltage Tolerance Part Number Marking ID Packing Type Tin Lead Lead Free Tin Lead Lead Free 0.4% AN-ATR AN-ATRE1 N41 EA1 Tape & Reel 0.8% BN-ATR BN-ATRE1 N42 EA2 Tape & Reel 0.4% AK-ATR AK-ATRE1 K3A E3A Tape & Reel 0.8% BK-ATR BK-ATRE1 K3B E3B Tape & Reel 0.4% AZ-A AZ-AE1 AZ-A AZ-AE1 Bulk 0.4% AZ-ATR AZ-ATRE1 AZ-A AZ-AE1 Ammo 0.8% BZ-A BZ-AE1 BZ-A BZ-AE1 Bulk 0.8% BZ-ATR BZ-ATRE1 BZ-A BZ-AE1 Ammo 0.4% AM-A AM-AE1 AM-A AM-AE1 Tube 0.4% AM-ATR AM-ATRE1 AM-A AM-AE1 Tape & Reel 0.8% BM-A BM-AE1 BM-A BM-AE1 Tube 0.8% BM-ATR BM-ATRE1 BM-A BM-AE1 Tape & Reel 0.4% AR-ATR AR-ATRE1 431A E43A Tape & Reel 0.8% BR-ATR BR-ATRE1 431B E43B Tape & Reel 3

4 Ordering Information (Continued) 20V Products Package SOT-23-3 SOT-23-5 TO-92 SOIC-8 SOT-89 Temperature Range -40 to 125 o C -40 to 125 o C -40 to 125 o C -40 to 125 o C -40 to 125 o C Voltage Tolerance Part Number Marking ID Packing Type Tin Lead Lead Free Tin Lead Lead Free 0.4% AN-BTR AN-BTRE1 N44 EA4 Tape & Reel 0.8% BN-BTR BN-BTRE1 N45 EA5 Tape & Reel 0.4% AK-BTR AK-BTRE1 K4A E4A Tape & Reel 0.8% BK-BTR BK-BTRE1 K4B E4B Tape & Reel 0.4% AZ-B AZ-BE1 AZ-B AZ-BE1 Bulk 0.4% AZ-BTR AZ-BTRE1 AZ-B AZ-BE1 Ammo 0.8% BZ-B BZ-BE1 BZ-B BZ-BE1 Bulk 0.8% BZ-BTR BZ-BTRE1 BZ-B BZ-BE1 Ammo 0.4% AM-B AM-BE1 AM-B AM-BE1 Tube 0.4% AM-BTR AM-BTRE1 AM-B AM-BE1 Tape & Reel 0.8% BM-B BM-BE1 BM-B BM-BE1 Tube 0.8% BM-BTR BM-BTRE1 BM-B BM-BE1 Tape & Reel 0.4% AR-BTR AR-BTRE1 431C E43C Tape & Reel 0.8% BR-BTR BR-BTRE1 431D E43D Tape & Reel BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. 4

5 Absolute Maximum Ratings (Note 1) Parameter Symbol Value Unit Cathode Voltage V KA (40V): 40 (20V): 20 V Cathode Current Range (Continuous) -100 to 150 ma Reference Input Current Range I REF 10 ma Power Dissipation P D M, Z, R Package: 770 N, K Package: 370 mw Junction Temperature T J 160 o C Storage Temperature Range T STG -65 to 150 o C M Package: 150 N Package: 330 Package Thermal Impedance θ JA Z Package: 150 o C/W R Package: 50 K Package: 250 ESD (Human Body Model) 2000 V Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability. Recommended Operating Conditions Parameter Symbol Min Max Unit (40V): 36 Cathode Voltage V KA V REF (20V): 18 V Cathode Current ma Operating Ambient Temperature Range o C 5

6 Electrical Characteristics for (40V) Operating Conditions: T A =25 o C unless otherwise specified. Parameter Reference Voltage Deviation of Reference Voltage Over-Temperature Ratio of Change in Reference Voltage to the Change in Cathode Voltage Test Circuit Symbol Conditions (40V) Min Typ Max 0.4% V REF V KA =V REF, =10mA 0.8% V REF V KA =V REF = 10mA 5 V REF V KA =10mA 0 to 70 o C to 85 o C V KA = 10V to V REF V KA = 36V to 10V Reference Current 5 I REF =10mA,R1=10KΩ, R2= µ A Deviation of Reference Current Over Full Temperature Range Minimum Cathode Current for Regulation Off-State Cathode Current 6 5 I REF =10mA, R1=10KΩ R2=, T A =-40 to 85 o C 4 (Min) (Off) Unit V mv mv/v µ A V KA =V REF ma V KA =36 V, V REF = Dynamic Impedance 4 Z KA V KA =V REF, =1 to 100mA, f 1.0KHz µ A Ω 6

7 Electrical Characteristics for (20V) Operating Conditions: T A =25 o C unless otherwise specified. Parameter Reference Voltage Deviation of Reference Voltage Over-Temperature Ratio of Change in Reference Voltage to the Change in Cathode Voltage Test Circuit Symbol Conditions (20V) Min Typ Max 0.4% V REF V KA =V REF, =10mA 0.8% V REF V KA =V REF =10mA 5 V REF V KA =10mA 0 to 70 o C to 85 o C V KA = 10V to V REF V KA = 18V to 10V Reference Current 5 I REF =10mA, R1=10KΩ, R2= µ A Deviation of Reference Current Over Full Temperature Range Minimum Cathode Current for Regulation Off-State Cathode Current 6 5 I REF =10mA, R1=10KΩ,R2= T A =-40 to 85 o C 4 (Min) (Off) Unit V mv mv/v µ A V KA =V REF ma V KA =18V, V REF = Dynamic Impedance 4 Z KA V KA =V REF, =1 to 100mA f 1.0KHz µ A Ω 7

8 Electrical Characteristics (Continued) R1 V IN V KA V REF Figure 4. Test Circuit 4 for V KA =V ref R3 V IN V KA R1 I REF V KA =V REF (1+R1/R2)+ I REF R1 R2 V REF Figure 5. Test Circuit 5 for V KA >V ref V IN V KA I OFF Figure 6. Test Circuit 6 for I OFF 8

9 Typical Performance Characteristics V KA = V REF = 10mA R 1 =10K,R 2 =Infinite =10mA Reference Voltage (V) Reference Current (µa) Ambient Temperature ( o C) Ambient Temperature ( 0 C) Figure 7. Reference Voltage vs. Ambient Temperature Figure 8. Reference Current vs. Ambient Temperature 150 V KA =V REF 800 V KA =V REF Cathode Current (ma) T A =25 0 C Cathode Current (µa) T A =25 0 C Cathode Voltage (V) Cathode Voltage (V) Figure 9. Cathode Current vs. Cathode Voltage Figure 10. Cathode Current vs. Cathode Voltage 9

10 Typical Performance Characteristics (Continued) 2.0 Off-State Cathode Current (µa) V:V KA =18V -40V:V KA =36V V REF =0 V REF / V KA (mv/v) V: V KA =3.5V to 18V -40V: V KA =3.5V to 36V Ambient Temperature ( o C) Ambient Temperature ( o C) Figure 11. Off-state Cathode Current vs. Figure 12. Ratio of Delta Reference Voltage to the Ambient Temperature Ratio of Delta Cathode Voltage Output 1K 60 10K 100K 1000K 50 T A = 25 o C = 10mA µF 15K Av (db) K K 10K 100K 1000K Small Signal Frequency 0 GND Figure 13. Small Signal Voltage Gain vs. Frequency 10

11 Typical Performance Characteristics (Continued) Reference Impedance (Ω) 10 1 =10mA T A =25 o C 50 1K Output 0.1 1K 10K 100K 1,000K GND Frequency (Hz) Figure 14. Reference Impedance vs. Frequency 100 Cathode Current (ma) A: V KA =5V B: V KA =10V V KA =15V: No Oscillation A B R1 (10K) R Load Capacitance (µf) Figure 15. Stability Boundary Conditions vs. Load Capacitance 11

12 Typical Performance Characteristics (Continued) 5 Input Input and Output Voltage (V) Output Pulse Generator f=100khz Output GND Time (µs) Figure 16. Pulse Response of Input and Output Voltage 12

13 Typical Application R3 V IN V OUT R1 V REF R2 V O =(1+R1/R2) V REF Figure 17. Shunt Regulator V IN R1 R4 V OUT R2 V OUT =(1+R2/R3)*V REF V REF R3 Figure 18. High Current Shunt Regulator R2 V IN I out R1 I OUT =V REF /R2 + Figure19. Current Source or Current Limit 13

14 Typical Application (Continued) V IN R1 8.2K AZ1117 Adjust R2 250 V OUT 5V, 1.5A R3 250 Figure20. Precision 5V 1.5A Regulator C1 R3 R4 R2 680 R5 V OUT R1 COMP PWM Controller VFB 3 4 U2 2 C2 Q1 PS521 Figure 21. PWM Converter with Reference 14

15 Mechanical Dimensions TO-92 Unit: mm (inch) 1.100(0.043) 1.400(0.055) 3.430(0.135) MIN 3.300(0.130) 3.700(0.146) 0.000(0.000) 0.380(0.015) 1.600(0.063) MAX 4.400(0.173) 4.700(0.185) 0.380(0.015) 0.550(0.022) (0.555) (0.571) 0.360(0.014) 0.510(0.020) 4.300(0.169) 4.700(0.185) 1.270(0.050) TYP 2.440(0.096) 2.640(0.104) 15

16 Mechanical Dimensions (Continued) SOT-23-3 Unit: mm(inch) 0.500(0.020) 0.700(0.028) R0.100(0.004) 0.900(0.035) 1.100(0.043) 0.100(0.004) GAUGE PLANE 7.0 R0.100(0.004) (0.041)REF 2.800(0.110) 3.000(0.118) 0.020(0.001) 0.100(0.004) 0.0 ~ (0.008)MIN 0.550(0.022)REF (0.003) 0.150(0.006) 2.300(0.091) 2.500(0.098) 1.200(0.047) 1.400(0.055) 0.920(0.036) 0.980(0.039) 1.900(0.075)REF 0.390(0.015) 0.450(0.018) 16

17 Mechanical Dimensions (Continued) SOT-23-5 Unit: mm(inch) 2.820(0.111) 3.020(0.119) 0.100(0.004) 0.200(0.008) 2.650(0.104) 2.950(0.116) 1.500(0.059) 1.700(0.067) 0.300(0.012) 0.600(0.024) 0.200(0.008) 0.700(0.028) REF 0.950(0.037) TYP 1.800(0.071) 2.000(0.079) 0.300(0.012) 0.400(0.016) (0.041) 1.250(0.049) 0.000(0.000) 0.100(0.004) 1.050(0.041) 1.150(0.045) 17

18 Mechanical Dimensions (Continued) SOT-89 Unit: mm(inch) 1.630(0.064) 1.830(0.072) 1.400(0.055)* 4.400(0.173) 4.600(0.181) 0.000(0.000) 0.076(0.003) 1.400(0.055) 1.600(0.063) R0.200(0.008) 3.950(0.156) 4.250(0.167) 0.900(0.035) 1.200(0.047) 2.300(0.091) 2.600(0.102) (0.014) 0.480(0.019) 3.000(0.118) 0.360(0.014) 0.480(0.019) 0.440(0.017) 0.560(0.022) 0.360(0.014) 0.440(0.017) 3 10 R0.150(0.006) 18

19 Mechanical Dimensions (Continued) SOIC-8 Unit: mm(inch) (0.189) 5.000(0.197) 1.350(0.053) 1.750(0.069) 0.320(0.013) (0.039) (0.050) TYP 0.100(0.004) 0.300(0.012) R0.150(0.006) 0.675(0.027) 0.725(0.029) D 0 8 D 20: (0.228) 6.200(0.244) 0.800(0.031) 0.200(0.008) 3.800(0.150) 4.000(0.157) 0.330(0.013) 0.510(0.020) 0.900(0.035) 1 5 R0.150(0.006) 0.190(0.007) 0.250(0.010) 19

20 IMPORTANT NOTICE reserves the right to make changes without further notice to any products or specifications herein. does not assume any responsibility for use of any its products for any particular purpose, nor does assume any liability arising out of the application or use of any its products or circuits. does not convey any license under its patent rights or other rights nor the rights of others. MAIN SITE - Wafer Fab Shanghai SIM- 800, Yi Shan Road, Shanghai , China Tel: , Fax: IC Design Group Advanced Analog Circuits (Shanghai) Corporation 8F, Zone B, 900, Yi Shan Road, Shanghai , China Tel: , Fax: REGIONAL SALES OFFICE Shenzhen Office Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd. Shenzhen Office Advanced Analog Circuits (Shanghai) Corporation Shenzhen Office 27B, Tower C, 2070, Middle Shen Nan Road, Shenzhen , China Tel: , Fax: Taiwan Office BCD Semiconductor (Taiwan) Company Limited 4F, 298-1, Rui Guang Road, Nei-Hu District, Taipei, Taiwan Tel: , Fax: USA Office BCD Semiconductor Corporation 3170 De La Cruz Blvd., Suite 105, Santa Clara, CA , U.S.A Tel: , Fax: