CM431 LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR GENERAL DESCRIPTION FEATURES The CM431 is a three-terminal adjustable shunt voltage regulator Initial voltage reference accuracy of 1.0%. with specified thermal stability and pin-to-pin compatible with the Sink current capability from 1mA to 100mA earlier 431 series. The output voltage can be adjusted to any Typical output dynamic impedance less than 200mΩ; value between VREF and 36V by using two external resistors. The Adjustable output voltage from VREF to 36V CM431 offers low output impedance for improved load regulation Available in SOT-23, SOT-89, TO-92, & SOP-8 with a typical output impedance of 200mΩ. Low output noise B B Because of the active output circuitry, the CM431 can replace the zener diodes in B B Typical equivalent full range temperature coefficient of 30ppm/ OC applications such as switching power supplies, OVP crowbar P P APPLICATIONS circuits, references for A/D, D/A converters with improved turn-on characteristics. Voltage Reference Precision shunt regulator High current shunt regulator PWM down converter with reference Voltage monitor PIN CONFIGURATION TO-92 Front View SOT-23-3 Top View CATHODE ANODE REF 3 1 1 2 CM431XCM2R3 Pin 1 REF CATHODE Pin 2 CATHODE REF Pin 3 ANODE ANODE Suffix “X”: Grade “A”, “B”, “C”, or “D” 2 3 SOT-23-5 SOT-89 Top View Top View 2 Rev.1.4 2 CATHODE ANODE REF CATHODE REF NC NC 1 1 SOP-8 Top View 4 ANODE 5 2006/10/11 CM431XCM233 1 CATHODE REF 8 2 NC NC 7 3 NC ANODE 6 4 NC NC 5 3 3 Champion Microelectronic Corporation Page 1 CM431 LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR TYPICAL APPLICATION BLOCK DIAGRAM VO = 5V B V+ B CATHODE Rb B B R1 27.5K 0.1% Note: Rb should provide cathode current ≥ 1mA B B + REF R2 27.5K 0.1% VREF B B ANODE 5V Precision Regulator ORDERING INFORMATION PACKAGE TOLERANCE 0.5% 0.7% 1.0% T/R Quantity SOT-23（1） CM431ACM233 CM431DCM233 CM431BCM233 TR=3K SOT-23（1） CM431ACM2R3 CM431DCM2R3 CM431BCM2R3 TR=3K SOT-89（1） CM431ACM89 CM431DCM89 CM431BCM89 TR=1K TO-92（2） CM431ACN CM431DCN CM431BCN TA=2K SOP-8 CM431ACS CM431DCS CM431BCS CM431GACM233* CM431GDCM233* CM431GBCM233* TR=3K SOT-23（1） CM431GACM2R3* CM431GDCM2R3* CM431GBCM2R3* TR=3K SOT-89（1） CM431GACM89* CM431GDCM89* CM431GBCM89* TR=1K TO-92（2） CM431GACN* CM431GDCN* CM431GBCN* TA=2K SOP-8 CM431GACS* CM431GDCS* CM431GBCS* P P P P P P P P （1） SOT-23 P P P P P P P P Notes： （1） Add suffix ″TR″for Tape & Reel. （2） Add suffix ″TA″for Tape Ammo. （3） *Note: Add suffix “G” for Pb Free Product 2006/10/11 Rev.1.4 Champion Microelectronic Corporation Page 2 CM431 LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR ABSOLUTE MAXIMUM RATINGS Cathode to Anode Voltage (VKA) (Note 2) -0.3V to 37V Continuous Cathode Current (IK) -100mA to 150mA B B B B Reference Input Current (IREF) B -50uA to 10mA B 150 OC Maximum junction temperature range, TJ B B P P O Storage temperature range -65 C to 150OC Lead temperature (soldiering, 10 seconds) 260 OC P P P P P P Note 1: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Note 2: Voltage values are with respect to the anode terminal unless otherwise noted. Currents are positive into, negative out of the specified terminal. POWER DISSIPATION TABLE θJA O ( C/W ) O Derating factor ( mW/ C ) TA≧25 OC O TA≦25 C Power rating(mW) TA=70 OC Power rating(mW) TA= 85 OC Power rating (mW) SOP-8 165 6.06 757 485 394 TO-92 156 6.41 801 513 417 SOT-89 71(note) 14.1 1763 1128 916 Package B P B P B P B P B P P B P P B B P P B SOT-23 285 3.5 438 280 Note : 1. For SOT-89 package, Thermal Resistance-Junction to Tab ( θJT ) = 35 OC/W. TJ = TTAB + (PD x θJT) 2. θJA: Thermal Resistance-Junction to Ambient 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. B B B B B B B B B B B B P P B B B B B B B B P P 228 B B B B B B B RECOMMENDED OPERATING CONDITIONS Operating free air temperature range, TA B Cathode current, IK B B B Cathode voltage, VKA B 2006/10/11 Rev.1.4 B Champion Microelectronic Corporation Min Max Units 0 105 1 100 mA 0 36 V O P C P Page 3 CM431 LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR ELECTRICAL CHARACTERISTICS Unless otherwise specified, these specifications apply over the operating ambient temperatures with TA = 25°C. B Parameter Symbol VREF B B CM431 Test Conditions Min 2.482 2.495 2.507 V 2.495 2.512 V 2.470 2.495 2.520 V 4 17 mV -1.4 -2.7 mV/V 2 4 μA B B B B B B B B B B B B B B IK = 10mA, VKA = VREF, 0 C ≤ TA ≤ 70 C O B B B B B B IREF B B P B B P P B IMIN Off-State Cathode Current IOFF B B B B |ZKA | B B B B B B B P P O B B P B VKA = 36V, VREF = 0V B B B B B B B 2.3 P B VKA = VREF, IK = 1mA to 100mA, B B B B VKA = VREF B B B IK = 10mA,VKA = VREF, 0 C ≤ TA ≤ 70 C Minimum Operating Current B B O B B Dynamic Impedance B IK = 10mA,VKA = VREF B Reference Input Current B O P IK = 10mA, VKA = 2.5V to 36V (note 4) Units 2.478 B B B Voltage Ratio, Ref to Cathode Max IK = 10mA, VKA = VREF ,0.7% IK = 10mA, VKA = VREF ,1.0% Reference Drift Typ IK = 10mA, VKA = VREF ,0.5% B Reference Input Voltage B 0.4 1 mA 0.1 1 μA 0.2 0.5 Ω B f ≤ 1kHz Note 3: These parameters are guaranteed by design VREF B Note 4: B VKA B 2006/10/11 Ratio of change in reference input voltage to the change in cathode voltage B Rev.1.4 Champion Microelectronic Corporation Page 4 CM431 LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR PARAMETER MEASUREMENT INFORMATION Input VKA B B Input VKA B R1 IREF B B B R2 VRE B EF B B (1 + R1/R2) + IREF x R1 B B Figure 2. Test Circuit for VKA > VREF Figure 1. Test Circuit for VKA = VREF B B B B Input B B B VKA B B IOFF B B Figure 3. Test Circuit for IOFF B 2006/10/11 Rev.1.4 Champion Microelectronic Corporation Page 5 CM431 LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR TYPICAL CHARACTERISTICS Cathode Current vs. Cathode Voltage Cathode Current vs. Cathode Voltage Ref. Input Voltage vs. Free-Air Temperature Ref. Input Current vs. Free-Air Temperature Stability Boundray Conditions 100 IKA-Cathode Current (mA) 90 80 70 60 50 40 30 20 10 0 0.001 2006/10/11 Rev.1.4 0.01 0.1 1 C L -Load Capacitance(uF) 10 Champion Microelectronic Corporation Page 6 CM431 LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR APPLICATION INFORMATION R* VBATT B VO B B R1 0.1% VREF B VBATT B B B CM431 VO CM431 B B Von ≈ 2V Voff ≈ VBATT Input R2 0.1% B B B B B B B Vth = 2.5V B B GND VO = (1 + R1/R2) × VREF B B B Note: R should provide 1mA cathode current to the CM431 of minimum VBATT B Figure 5. Single –Supply Comparator With Temperature compensated threshold. Figure 4. Shunt Regulator VBATT B VO B B B VO VBATT B B B B R1 R1 CM431 R2 C R2 CM431 VO = (1 + R1/R2) × VREF B B B Figure 6. High-Current Shunt Regulator 2006/10/11 Rev.1.4 Figure 7. Crowbar Circuit Champion Microelectronic Corporation Page 7 CM431 LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR APPLICATION INFORMATION (continued) VBATT B VBATT VO = 5V/1.5A B LM317 B B B IO = VREF/RS B B B B B B Adjust 8.2KΩ 243Ω 0.1% CM431 CM431 RS 0.1% 243Ω 0.1% B Figure 8.Precision 5V, 1.5A Regulator VBATT B B Figure 9. Precision Constant Current Sink RCL 0.1% IN B B B OUT 78L05 VO B Common VBATT B B IO B B B B R1 R1 CM431 R2 CM431 IOUT = (VREF/RCL) + IKA B B B B B B B R1 = VBATT/((IO/hFE) + IKA) B VO = (1 + R1/R2) × VREF B B B B B B B B B B Min VO = VREF + 5V B B B B Figure 10. Output Control of a Three-Terminal Fixed Regulator 2006/10/11 Rev.1.4 Figure 11. Precision Current Limiter Champion Microelectronic Corporation Page 8 CM431 LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR 3-Pin Plastic TO-92 Package Dimension INCHES MIN B TYP MILLIMETERS MAX MIN TYP MAX A 0.175 0.180 0.205 4.45 4.57 5.21 B 0.170 0.180 0.210 4.32 4.57 5.33 C 0.125 0.142 0.165 3.18 3.62 4.19 K A G F C F - 0.015 - - 0.38 - G - 0.050 - - 1.27 - J - 0.150 - - 3.81 - 0.500 0.580 - 12.70 14.73 - K N M - 5º - - 5º - N - 5º - - 5º - 3-Pin Plastic TO-92 Carrier Dimensions P P1 INCHES MIN TYP MAX MIN TYP MAX - - 2.00 - - 0.480 0.500 0.520 12.2 12.7 13.2 Po 0.488 0.500 0.512 12.4 12.7 13.0 Do 0.150 0.157 0.165 3.8 4.0 4.2 P1 0.230 0.250 0.256 5.85 6.35 6.85 Fo 0.165 0.197 0.220 4.2 5.0 5.6 W 0.669 0.709 0.748 17.0 18.0 19.0 Ho 0.610 0.630 0.649 15.5 16.0 16.5 Wo 0.224 0.236 0.248 5.7 6.0 6.3 W1 0.335 0.354 0.374 8.5 9.0 9.5 C C 0.079 Ho W1 P Wo W F1 Do Po Fo MILLIMETERS Note: For TO-92, 2,500 units per ammo 2006/10/11 Rev.1.4 Champion Microelectronic Corporation Page 9 CM431 LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR Surface Mount SOT-23 INCHES MIN D C L MIN TYP MAX 0.039 0.043 0.051 1.00 1.10 1.30 0.004 0.00 - 0.10 A2 0.028 0.032 0.035 0.70 0.80 0.90 0.014 0.016 0.020 0.35 0.40 0.50 C 0.004 0.005 0.010 0.10 0.15 0.25 D 0.106 0.114 0.122 2.70 2.90 3.10 E 0.055 0.063 0.071 1.40 1.60 1.80 e 0.075 TYP. A1 0.000 H E MAX A TYP MILLIMETERS b - M e A A2 A1 b 1.90 TYP. H 0.102 0.110 0.118 2.60 2.80 3.00 L 0.015 - - 0.37 - - M 1° 5° 9° 1° 5° 9° Surface Mount SOT-23 Carrier Dimensions A B MILLIMETERS M E D A 4.0 ± 0.1 M 1.5 ± 0.1 B 2.0 ± 0.05 N 1.1 ± 0.1 C 4.0± 0.1 D 2.5 ± 0.05 E 1.75 ± 0.1 F 6.0 ± 0.2 F N C DIRECTION OF FEED 2006/10/11 Rev.1.4 Champion Microelectronic Corporation Page 10 CM431 LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR SOT-89 Package Dimension D D1 L 5° H E φ1.0 C e e1 A 8° L b b1 C D D1 H E e1 b b1 e b 8-Pin Plastic S.O.I.C. PIN 1 ID θ θ 2006/10/11 Rev.1.4 Champion Microelectronic Corporation Page 11 CM431 LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR IMPORTANT NOTICE Champion Microelectronic Corporation (CMC) reserves the right to make changes to its products or to discontinue any integrated circuit product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current. A few applications using integrated circuit products may involve potential risks of death, personal injury, or severe property or environmental damage. CMC integrated circuit products are not designed, intended, authorized, or warranted to be suitable for use in life-support applications, devices or systems or other critical applications. Use of CMC products in such applications is understood to be fully at the risk of the customer. In order to minimize risks associated with the customer’s applications, the customer should provide adequate design and operating safeguards. HsinChu Headquarter 5F, No. 11, Park Avenue II, Science-Based Industrial Park, HsinChu City, Taiwan T E L : +886-3-5679979 F A X : +886-3-5679909 2006/10/11 Rev.1.4 Sales & Marketing 7F-6, No.32, Sec. 1, Chenggong Rd., Nangang District, Taipei City 115, Taiwan , R.O.C. T E L : +886-2-2788 0558 F A X : +886-2-2788 2985 T T T T Champion Microelectronic Corporation Page 12