CM431L ETC1 | Alldatasheet

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Technical content

LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR GENERAL DESCRIPTION

FEATURES

LOW voltage operation（1.24V） Adjustable output voltage V0 = VREF to 20V Wide operating current range 60μA to 100mA LOW dynamic output impedance 0.25Ω typ. Trimmed bandgap design ± 0.5%

APPLICATIONS

The CM431L is a low voltage three terminal adjustable shunt regulator with thermal stability guaranteed over temperature. The output voltage can be adjusted to any value from 1.24V （VREF）to 20V with two external resistors. The CM431L has a typical dynamic output impedance of 0.25Ω. Active output circuitry provides a very sharp turn on characteristic, making the CM431L an excellent replacement for zener diodes. 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 REF ANODE CATHODE SOT-23-3 Top View CM431LXCM233 CM431LXCM2R3 Pin 1 REF CATHODE Pin 2 CATHODE REF Pin 3 ANODE ANODE 2006/02/10 Rev. 5 Champion Microelectronic Corporation Page 1 SOT-23-5 Top View NC ANODE CATHODE REF NC SOT-89 Top View REF ANODE CATHODE SOP-8 Top View CATHODE NC NC NC REF NC ANODE NC

LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR BLOCK DIAGRAM BLOCK DIAGRAM SYMBOL DIAGRAM Cathode Anode Ref 2006/02/10 Rev. 5 Champion Microelectronic Corporation Page 2

LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR 2006/02/10 Rev. 5 Champion Microelectronic Corporation Page 3

ORDERING INFORMATION

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 SOT-23-3 （1） 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* Notes： （1） Add suffix ″TR″for Tape & Reel. （2） Add suffix ″TA″for Tape Ammo. （3） *Note: Add suffix “G” for Pb Free Product

LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR 2006/02/10 Rev. 5 Champion Microelectronic Corporation Page 4 ABSOULTE MAXIMUM RATINGS Parameter Symbol Maximum Units Cathode Voltage VZ V Continuous Cathode Current IZ 100 mA Reference Current IREF mA Operating Junction Temperature Range TJ -40 to +150 Storage Temperature Range TSTG -65 to + 150 Thermal Resistance TO-92 SOT-23-3 SOT-23-5 SOT-89 SOP-8 θJA 160 410 256 110 175 ℃/W Power Dissipation at TA =25℃ TO-92 SOT-23-3 SOT-23-5 SOT-89 SOP-8 PD 0.78 0.30 0.30 1.00 0.71 W Lead Temperature（Soldering）10 seconds TLEAD 250 RECOMMENDED OPERATING CONDITION Min Max Symbol Cathode Voltage. Vz VREF V Cathode Current. Iz 100 mA Operating Temperature 105

LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR ELECTRICAL CHARACTERISTICS Unless specified, TA = 25℃ CM431L 0.5% CM431L 0.7% Parameter Symbol Condition MIN TYP MAX MIN TYP MAX UNITS TA=25℃ 1.234 1.240 1.246 1.231 1.240 1.249 Reference Voltage VREF Vz=VREF , Iz=10mA TA=-40 to+85℃1.222 1.258 1.222 1.258 V VREF Temp Deviation VDEV TA=-40 to +85℃, Vz= VREF Iz=10mA mV Ratio of Change in VREF to Change in Cathode Voltage ΔVREF ΔVz Iz=10mA, ΔVZ=16V to VREF -1.0 -2.7 -1.0 -2.7 mV/V Reference Input Current IREF R1=10kΩ, R2=∞, Iz=10mA 0.15 0.5 0.15 0.5 μA IREF Temp Deviation IREF（DEV）TA=-40 to +85℃ R1=10 kΩ R2= ∞, Iz=10mA 0.1 0.4 0.1 0.4 μA VZ=6V 0.5 2.0 0.5 2.0 Off State Cathode Current Iz（off） VREF=0V VZ=16V 0.5 2.0 0.5 2.0 μA Dynamic Output Impedance rz f < 1KHz, VZ= VREF Iz=100μA to 100 mA 0.25 0.4 0.25 0.4 Ω Minimum Operating Current IZ（min） VZ= VREF μA 2006/02/10 Rev. 5 Champion Microelectronic Corporation Page 5

LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR ELECTRICAL CHARACTERISTICS (CONTINUED) Unless specified, TA = 25℃ CM431L 1% CM431L 2% Parameter Symbol Condition MIN TYP MAX MIN TYP MAX UNITS TA=25℃ 1.228 Reference Voltage Vz=VREF , Iz=10mA TA=-40 to+85℃1.215 1.265 1.200 1.280 VREF V VREF Temp Deviation VDEV TA=-40 to +85℃, Vz= VREF Iz=10mA mV ΔVREF ΔVz Iz=10mA, ΔVZ=16V to VREF -1.0 -2.7 -1.0 -2.7 Ratio of Change in VREF to Change in Cathode Voltage mV/V Reference Input Current IREF R1=10kΩ, R2=∞, Iz=10mA 0.15 0.5 0.15 0.5 μA IREF Temp Deviation IREF（DEV）TA=-40 to +85℃ R1=10 kΩ R2= ∞, Iz=10mA 0.1 0.4 0.1 0.4 μA VZ=6V 0.5 2.0 0.5 2.0 Off State Cathode Current Iz（off） VREF=0V VZ=16V 0.5 2.0 0.5 2.0 μA Dynamic Output Impedance rz f < 1KHz, VZ= VREF Iz=100μA to 100 mA 0.25 0.4 0.25 0.4 Ω Minimum Operating Current IZ（min） VZ= VREF μA 2006/02/10 Rev. 5 Champion Microelectronic Corporation Page 6

LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR TYPICAL CHARACTERISTICS Cathode Current vs. Cathode Voltage -300 -200 -100 100 200 300 -0.5 0.5 1.5 Vz(V) Iz(uA) Cathode Current vs. Cathode Voltage -150 -100 -50 100 150 -1.5 -0.5 0.5 1.5 Vz(V) Iz(mA) Vz=VREF TA=25℃ Reference Voltage vs. Junction Temperature 1.234 1.236 1.238 1.24 1.242 1.244 1.246 1.248 -50 -25 100 125 150 TJ(℃) VREF(V) Iz=10mA Iz=80uA Reference Input Current vs. Junction Temperature 100 125 150 -50 -25 100 125 150 TJ(℃) IREF(nA) Iz=10mA R1=10kΩ R2=∞ Ratio of Delta Ref. Voltage to Delta Cathode Voltage vs. Junction Temperature 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.1 1.2 -50 -25 100 125 150 TJ(℃) △VREF/△Vz(-mV/V) Iz=10mA △Vz=16V to VREF Off State Cathode Current vs. Junction Temperature 100 150 200 250 -50 -25 100 125 150 TJ(℃) Iz(off) (nA) VREF = 0V 2006/02/10 Rev. 5 Champion Microelectronic Corporation Page 7

LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR TYPICAL CHARACTERISTICS (Conti) 2006/02/10 Rev. 5 Champion Microelectronic Corporation Page 8 Stability Boundary Condition 0.5 1.5 2.5 3.5 50 PF 0.002uF 0.005uF 0.008uF 0.02uF 0.05uF 0.08uF 0.2uF 0.5uF 0.8uF CL Iz (mA)

LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR APPLICATION CIRCUIT Notes for Application Circuit： Set VOUT according to the following equation： VOUT =VREF ( 1 + R1/R2 ) +IREF R1 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 ≥ （to limit instantaneous turn-on Iz） VIN（max） 150mA 2006/02/10 Rev. 5 Champion Microelectronic Corporation Page 9 Rmin ≥ （to limit Iz under normal operating conditions） VIN（max）–VOUT IOUT（min）+ 100mA

LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR PACKAGE DIMENSION TO-92 L e θ A b D E A θ E D L e b 3-Pin Plastic TO-92 Carrier Dimensions 2006/02/10 Rev. 5 Champion Microelectronic Corporation Page 10

LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR PACKAGE DIMENSION (CONTINUED) SOT-23-3 L D E A b c θ e D E e b A b c Base Metal With Plating Section B-B See Section B-B L θ SOT-23-5 L D E A b c θ e D E e b A b c Base Metal With Plating Section B-B See Section B-B L θ 2006/02/10 Rev. 5 Champion Microelectronic Corporation Page 11

LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR PACKAGE DIMENSION (CONTINUED) SOT-89 e H E A b L C D D e E L H b b C φ1.0 8-PIN SOP (S08) PIN 1 ID θ θ 2006/02/10 Rev. 5 Champion Microelectronic Corporation Page 12

LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR 2006/02/10 Rev. 5 Champion Microelectronic Corporation Page 13 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 EL: +886-3-567 9979 T EL: +886-2-8692 1591 FAX: +886-3-567 9909 FAX: +886-2-8692 1596