CM431L LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR GENERAL DESCRIPTION FEATURES The CM431L is a low voltage three terminal adjustable shunt LOW voltage operation（1.24V） regulator with thermal stability guaranteed over temperature. Adjustable output voltage V0 = VREF to 20V The output voltage can be adjusted to any value from 1.24V Wide operating current range 60μA to 100mA （VREF）to 20V with two external resistors. The CM431L has a LOW dynamic output impedance 0.25Ω typ. typical dynamic output impedance of 0.25Ω. Active output Trimmed bandgap design ± 0.5% circuitry provides a very sharp turn on characteristic, making the CM431L an excellent replacement for zener diodes. APPLICATIONS The CM431L shunt regulator is available in four voltage tolerances（0.5%, 0.7%, 1.0% and 2.0%）and four package options (SOT-23-3, SOT-23-5, SOT-89, TO-92, and SOP-8). Four voltage tolerances allow the designer the opportunity to select the proper cost/tolerance for their application. Linear Regulators Adjustable Supplies Switching Power Supplies Battery Operated Computers Instrumentation Computer Disk Drivers PIN CONFIGURATION TO-92 Front View SOT-23-3 Top View CATHODE ANODE REF 3 Pin 1 Pin 2 Pin 3 CM431LXCM233 REF CATHODE ANODE CM431LXCM2R3 CATHODE REF ANODE Suffix “X”: Grade “A”, “B”, “C”, or “D” 1 3 NC NC 1 2 2006/02/10 Rev. 5 CATHODE REF 4 ANODE 5 SOP-8 Top View SOT-89 Top View CATHODE SOT-23-5 Top View ANODE 2 REF 1 2 1 2 3 1 CATHODE REF 8 2 NC NC 7 3 NC ANODE 6 4 NC NC 5 3 Champion Microelectronic Corporation Page 1 CM431L LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR BLOCK DIAGRAM BLOCK DIAGRAM SYMBOL DIAGRAM Cathode Ref Anode 2006/02/10 Rev. 5 Champion Microelectronic Corporation Page 2 CM431L LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR ORDERING INFORMATION PACKAGE TOLERANCE 0.5% 0.7% 1.0% 2.0% T/R Quantity SOT-23-3（1） CM431LACM233 CM431LDCM233 CM431LBCM233 CM431LCCM233 TR=3K SOT-23-3（1） CM431LACM2R3 CM431LDCM2R3 CM431LBCM2R3 CM431LCCM2R3 TR=3K SOT-23-5（1） CM431LACM235 CM431LDCM235 CM431LBCM235 CM431LCCM235 TR=3K SOT-89（1） CM431LACM89 CM431LDCM89 CM431LBCM89 CM431LCCM89 TR=1K TO-92（2） CM431LACN CM431LDCN CM431LBCN CM431LCCN TA=2K SOP-8 CM431LACS CM431LDCS CM431LBCS CM431LCCS CM431LGACM233* CM431LGDCM233* CM431LGBCM233* CM431LGCCM233* TR=3K SOT-23-3（1） CM431LGACM2R3* CM431LGDCM2R3* CM431LGBCM2R3* CM431LGCCM2R3* TR=3K SOT-23-5（1） CM431LGACM235* CM431LGDCM235* CM431LGBCM235* CM431LGCCM235* TR=3K SOT-89（1） CM431LGACM89* CM431LGDCM89* CM431LGBCM89* CM431LGCCM89* TR=1K TO-92（2） CM431LGACN* CM431LGDCN* CM431LGBCN* CM431LGCCN* TA=2K SOP-8 CM431LGACS* CM431LGDCS* CM431LGBCS* CM431LGCCS* SOT-23-3（1） Notes： （1） Add suffix ″TR″for Tape & Reel. （2） Add suffix ″TA″for Tape Ammo. （3） *Note: Add suffix “G” for Pb Free Product 2006/02/10 Rev. 5 Champion Microelectronic Corporation Page 3 CM431L LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR ABSOULTE MAXIMUM RATINGS Parameter Symbol Maximum Units Cathode Voltage VZ 20 V Continuous Cathode Current IZ 100 mA IREF 3 mA TJ -40 to +150 ℃ TSTG -65 to + 150 ℃ Reference Current Operating Junction Temperature Range Storage Temperature Range θJA Thermal Resistance ℃/W TO-92 160 SOT-23-3 410 SOT-23-5 256 SOT-89 110 SOP-8 175 Power Dissipation at TA =25℃ PD TO-92 0.78 SOT-23-3 0.30 SOT-23-5 0.30 SOT-89 1.00 SOP-8 0.71 Lead Temperature（Soldering）10 seconds TLEAD 250 W ℃ RECOMMENDED OPERATING CONDITION Min Max Symbol Cathode Voltage. Vz VREF 16 V Cathode Current. Iz 80 100 mA Operating Temperature 0 105 ℃ 2006/02/10 Rev. 5 Champion Microelectronic Corporation Page 4 CM431L LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR ELECTRICAL CHARACTERISTICS Parameter Reference Voltage VREF Temp Deviation Ratio of Change in VREF to Change in Cathode Voltage Reference Input Current IREF Temp Deviation CM431L 0.5% CM431L 0.7% Symbol Condition MIN TYP MAX MIN TYP MAX UNITS VREF Vz=VREF , TA=25℃ 1.234 1.240 1.246 1.231 1.240 1.249 Iz=10mA V 1.258 1.222 1.258 TA=-40 to+85℃ 1.222 VDEV TA=-40 to +85℃, Vz= VREF Iz=10mA 10 25 10 25 mV -1.0 -2.7 -1.0 -2.7 mV/V 0.15 0.5 0.15 0.5 μA 0.1 0.4 0.1 0.4 μA 0.5 0.5 2.0 2.0 0.5 0.5 2.0 2.0 μA 0.25 0.4 0.25 0.4 Ω 60 80 60 80 μA ΔVREF Iz=10mA, ΔVZ=16V to VREF ΔVz IREF R1=10kΩ, R2=∞, Iz=10mA IREF（DEV） TA=-40 to +85℃ R1=10 kΩ R2= ∞, Iz=10mA Off State Cathode Current Dynamic Output Impedance Iz（off） Minimum Operating Current IZ（min） VZ= VREF 2006/02/10 Rev. 5 Unless specified, TA = 25℃ rz VREF=0V VZ=6V VZ=16V f < 1KHz, VZ= VREF Iz=100μA to 100 mA Champion Microelectronic Corporation Page 5 CM431L LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR ELECTRICAL CHARACTERISTICS (CONTINUED) Parameter Reference Voltage VREF Temp Deviation Ratio of Change in VREF to Change in Cathode Voltage Reference Input Current IREF Temp Deviation CM431L 1% CM431L 2% Symbol Condition MIN TYP MAX MIN TYP MAX VREF Vz=VREF , TA=25℃ 1.228 1.240 1.252 1.215 1.240 1.265 Iz=10mA 1.265 1.200 1.280 TA=-40 to+85℃ 1.215 VDEV TA=-40 to +85℃, Vz= VREF Iz=10mA UNITS V 10 25 10 35 mV -1.0 -2.7 -1.0 -2.7 mV/V 0.15 0.5 0.15 0.5 μA 0.1 0.4 0.1 0.4 μA 0.5 0.5 2.0 2.0 0.5 0.5 2.0 2.0 μA 0.25 0.4 0.25 0.4 Ω 60 80 60 60 μA ΔVREF Iz=10mA, ΔVZ=16V to VREF ΔVz IREF R1=10kΩ, R2=∞, Iz=10mA IREF（DEV） TA=-40 to +85℃ R1=10 kΩ R2= ∞, Iz=10mA Off State Cathode Current Dynamic Output Impedance Iz（off） Minimum Operating Current IZ（min） VZ= VREF 2006/02/10 Rev. 5 Unless specified, TA = 25℃ rz VREF=0V VZ=6V VZ=16V f < 1KHz, VZ= VREF Iz=100μA to 100 mA Champion Microelectronic Corporation Page 6 CM431L LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR TYPICAL CHARACTERISTICS Cathode Current vs. Cathode Voltage 300 150 200 100 100 50 Iz(mA) Iz(uA) Cathode Current vs. Cathode Voltage 0 0 -100 -50 -200 -100 -300 -1 -0.5 0 0.5 1 Vz=VREF TA=25℃ -150 -1.5 1.5 -1 -0.5 Vz(V) 0 0.5 1 1.5 Vz(V) Reference Input Current vs. Junction Tem perature Reference Voltage vs. Junction Temperature 1.248 Iz=10mA 1.246 150 125 1.242 1.24 Iz=80uA 1.238 IREF(nA) VREF(V) 1.244 100 75 1.236 50 -50 1.234 -50 -25 0 25 50 75 100 125 150 -25 0 25 Ratio of Delta Ref. Voltage to Delta Cathode Voltage vs. Junction Tem perature Off State Cathode Current vs. Junction Temperature 250 VREF = 0V 200 Iz(off) (nA) △ V REF/△ V z (-mV/V) 75 TJ ( ℃ ) TJ(℃) 1.2 1.1 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 -50 50 Iz=10mA R1=10kΩ R2=∞ 100 125 150 Iz=10mA △ Vz=16V to V REF -25 0 25 50 75 100 125 150 150 100 50 0 -50 -25 TJ ( ℃ ) 2006/02/10 Rev. 5 0 25 50 75 100 125 150 TJ(℃) Champion Microelectronic Corporation Page 7 CM431L LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR TYPICAL CHARACTERISTICS (Conti) 50 PF 0. 00 2u F 0. 00 5u F 0. 00 8u F 0. 02 uF 0. 05 uF 0. 08 uF 0. 2u F 0. 5u F 0. 8u F Iz (mA) Stability Boundary Condition 3.5 3 2.5 2 1.5 1 0.5 0 CL 2006/02/10 Rev. 5 Champion Microelectronic Corporation Page 8 CM431L LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR APPLICATION CIRCUIT Notes for Application Circuit： 1) Set VOUT according to the following equation： VOUT =VREF ( 1 + R1/R2 ) +IREF R1 2) Choose the value for R as follows： • The maximum limit for R should be such that the cathode current, Iz, is greater than the minimum operating current（80μA）at VIN（min）. • The minimum limit for R should be such that Iz does not exceed 100mA under all load conditions, and the instantaneous turn-on value for Iz does not exceed 150mA. Both of the following conditions must be met： Rmin ≥ VIN（max） （to limit instantaneous turn-on Iz） 150mA Rmin ≥ VIN（max）–VOUT （to limit Iz under normal operating conditions） IOUT（min）+ 100mA 2006/02/10 Rev. 5 Champion Microelectronic Corporation Page 9 CM431L LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR PACKAGE DIMENSION TO-92 θ A A1 b D A D1 E L e θ θ1 A1 L θ1 e D D1 b E ` 3-Pin Plastic TO-92 Carrier Dimensions 2006/02/10 Rev. 5 Champion Microelectronic Corporation Page 10 CM431L LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR PACKAGE DIMENSION (CONTINUED) SOT-23-3 D 3 b1 With Plating c c1 A A1 E1 E A2 b b Base Metal b1 c Section B-B c1 D E 1 2 e E1 b e1 L L1 e θ1 e1 θ θ1 θ A2 A θ2 θ2 A1 L L1 See Section B-B SOT-23-5 D 5 4 b1 With Plating c c1 A A1 E1 E A2 b b Base Metal b1 c Section B-B c1 D E 1 e 2 3 e1 E1 b L L1 e θ1 e1 θ θ1 θ A2 A θ2 θ2 A1 L 2006/02/10 Rev. 5 See Section B-B L1 Champion Microelectronic Corporation Page 11 CM431L LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR PACKAGE DIMENSION (CONTINUED) SOT-89 D D1 L 5° H E φ1.0 C e e1 A 8° L b b1 C D D1 H E e1 b b1 b e 8-PIN SOP (S08) PIN 1 ID θ θ 2006/02/10 Rev. 5 Champion Microelectronic Corporation Page 12 CM431L 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 Sales & Marketing 5F, No. 11, Park Avenue II, Science-Based Industrial Park, HsinChu City, Taiwan 11F, No. 306-3, SEC. 1, Ta Tung Road, Hsichih, Taipei Hsien 221, Taiwan T E L : +886-3-567 9979 T E L : +886-2-8692 1591 FA X : +886-3-567 9909 FA X : +886-2-8692 1596 2006/02/10 Rev. 5 Champion Microelectronic Corporation Page 13