LM4130 Precision Micropower Low Dropout Voltage Reference General Description Features The LM4130 family of precision voltage references performs comparable to the best laser-trimmed bipolar references, but in cost effective CMOS technology. Key to this break through is the use of EEPROM registers for correction of curvature, tempco, and accuracy on a CMOS bandgap architecture that allows package level programming to overcome assembly shift. The shifts in voltage accuracy and tempco during assembly of die into plastic packages limit the accuracy of references trimmed with laser techniques. Unlike other LDO references, the LM4130 requires no output capacitor. Neither is a buffer amplifier required, even with loads up to 20mA. These advantages and the SOT23 packaging are important for cost-critical and space-critical applications. Series references provide lower power consumption than shunt references, since they don’t have to idle the maximum possible load current under no load conditions. This advantage, the low quiescent current (75µA), and the low dropout voltage(275mV) make the LM4130 ideal for battery-powered solutions. n n n n n n n n n n n n The LM4130 is available in five grades (A, B, C, D and E) for greater flexibility. The best grade devices (A) have an initial accuracy of 0.05% with guaranteed temperature coefficient of 10ppm/˚C or less, while the lowest grade parts (E) have an initial accuracy of 0.5% and a tempco of 30ppm/˚C. Small SOT23-5 package High output voltage accuracy 0.05% Low Temperature Coefficient 10 ppm/˚C Stable with capacitive loads to 100µF Low dropout voltage ≤275 mV @ 10 mA Supply Current ≤75 µA Full accuracy −40˚C to 85˚C Extended operation to 125˚C Excellent load and line regulation Output current 20 mA < 1Ω Output impedance Voltage options: 2.048V, 2.500V, and 4.096V Applications Summary n n n n n n n n n n n Portable, battery powered equipment Instrumentation and process control Automotive & Industrial Test equipment Data acquisition systems Precision regulators Battery chargers Base stations Communications Medical equipment Servo systems Connection Diagram and Pin Configuration DS101046-2 DS101046-1 *Optional, Recommended for improved transient response and input noise reduction. (See Application Information) © 1999 National Semiconductor Corporation DS101046 Refer to the Ordering Information Table in this Data Sheet for Specific Part Number SOT23-5 Surface Mount Package www.national.com LM4130 Precision Micropower Low Dropout Voltage Reference November 1999 LM4130 Ordering Information Industrial Temperature Range (−40˚C to + 85˚C) Initial Output Voltage Accuracy at 25˚C And Temperature Coefficient LM4130 Supplied as 1000 Units, Tape and Reel LM4130 Supplied as 3000 Units, Tape and Reel Part Marking LM4130AIM5-2.0 LM4130AIM5X-2.0 R02A LM4130AIM5-2.5 LM4130AIM5X-2.5 R03A LM4130AIM5-4.1 LM4130AIM5X-4.1 R04A LM4130BIM5-2.0 LM4130BIM5X-2.0 R02B LM4130BIM5-2.5 LM4130BIM5X-2.5 R03B LM4130BIM5-4.1 LM4130BIM5X-4.1 R04B LM4130CIM5-2.0 LM4130CIM5X-2.0 R02C LM4130CIM5-2.5 LM4130CIM5X-2.5 R03C LM4130CIM5-4.1 LM4130CIM5X-4.1 R04C LM4130DIM5-2.0 LM4130DIM5X-2.0 R02D LM4130DIM5-2.5 LM4130DIM5X-2.5 R03D LM4130DIM5-4.1 LM4130DIM5X-4.1 R04D LM4130EIM5-2.0 LM4130EIM5X-2.0 R02E LM4130EIM5-2.5 LM4130EIM5X-2.5 R03E LM4130EIM5-4.1 LM4130EIM5X-4.1 R04E 0.05%, 10 ppm/˚C max (A grade) 0.2%, 10 ppm/˚C max (B grade) 0.1%, 20 ppm/˚C max (C grade) 0.4%, 20 ppm/˚C max (D grade) 0.5%, 30 ppm/˚C max (E grade) SOT23-5 Package Marking Information Only four fields of marking are possible on the SOT23-5’s small surface. This table gives the meaning of the four fields. Field Information First Field: R = Reference Second and Third Field: 02 = 2.048V Voltage Option 03 = 2.50V Voltage Option 04 = 4.096V Voltage Option Fourth Field: A-E = Initial Reference Voltage Tolerance and Temperature Coefficient A = ± 0.05%, 10ppm/˚C B = ± 0.2%, 10ppm/˚C C = ± 0.1%, 20ppm/˚C D = ± 0.4%, 20ppm/˚C E = ± 0.5%, 30ppm/˚C www.national.com 2 Lead Temperature: Soldering, (10 sec.) Maximum Voltage on any Input −0.3V to 6V Output Short-Circuit Duration Power Dissipation (TA = 25˚C) Indefinite +260˚C Vapor Phase (60 sec.) +215˚C Infrared (15 sec.) +220˚C Operating Range (Note 1) 350 mW Storage Temperature Range (Note 2) −65˚C to +150˚C Operating Temperature Range ESD Susceptibility (Note 3) Human Body Model 2 kV Machine Model 200V −40˚C to +85˚C LM4130-2.048 Electrical Characteristics Unless otherwise specified VCC = 5V, ILOAD = 0, TA = 25˚C. Limits with standard typeface are for TA = 25˚C, and limits in boldface type apply over the operating temperature range. Symbol VREF TCVREF/˚C (Note 6) Parameter Conditions Min (Note 5) Typ (Note 4) ± 0.05 ± 0.2 ± 0.1 ± 0.4 ± 0.5 Temperature Coefficient LM4130A, B ppm/˚C 0˚C ≤ TA ≤ +85˚C −40˚C ≤ TA ≤ +85˚C 10 20 20 LM4130E Line Regulation 30 ILOAD = 100µA ppm/V VREF + 300 mV ≤ VIN ≤ 5.5V 75 VREF + 400 mV ≤ VIN ≤ 5.5V ∆VREF/∆ILOAD 200 350 Load Regulation 0 mA ≤ ILOAD ≤ 20 mA Long-Term Stability (Note 7) 1000 Hrs 50 Thermal Hysteresis (Note 8) −40˚C ≤ TA ≤ +125˚C 50 VIN - VREF Dropout Voltage (Note 9) ILOAD = 10 mA VN Output Noise Voltage 0.1 Hz to 10 Hz IS Supply Current ISC Short Circuit Current ∆VREF Units % Output Voltage Initial Accuracy LM4130A-2.048 LM4130B-2.048 LM4130C-2.048 LM4130D-2.048 LM4130E-2.048 LM4130C, D ∆VREF/∆VIN Max (Note 5) 32 60 80 ppm 275 400 125 50 30 3 ppm/mA mV µVPP 75 90 µA 60 mA 65 mA www.national.com LM4130 Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. LM4130 LM4130-2.500 Electrical Characteristics Unless otherwise specified VCC = 5V, ILOAD = 0 TA = 25˚C. Limits with standard typeface are for TA = 25˚C, and limits in boldface type apply over the operating temperature range. Symbol VREF TCVREF/˚C (Note 6) Parameter Conditions Min (Note 5) Typ (Note 4) ± 0.05 ± 0.2 ± 0.1 ± 0.4 ± 0.5 Temperature Coefficient LM4130A, B ppm/˚C 0˚C ≤ TA ≤ +85˚C −40˚C ≤ TA ≤ +85˚C 10 20 20 LM4130E Line Regulation 30 ILOAD = 100µA ppm/V VREF + 200 mV ≤ VIN ≤ 5.5V 30 VREF + 400 mV ≤ VIN ≤ 5.5V ∆VREF/∆ILOAD 0 mA ≤ ILOAD ≤ 20 mA 25 Long-Term Stability (Note 7) 1000 Hrs 50 Thermal Hysteresis (Note 8) −40˚C ≤ TA ≤ +125˚C 50 VIN - VREF Dropout Voltage (Note 9) ILOAD = 10 mA VN Output Noise Voltage 0.1 Hz to 10 Hz IS Supply Current ISC Short Circuit Current www.national.com 100 150 Load Regulation ∆VREF Units % Output Voltage Initial Accuracy LM4130A-2.500 LM4130B-2.500 LM4130C-2.500 LM4130D-2.500 LM4130E-2.500 LM4130C, D ∆VREF/∆VIN Max (Note 5) 60 80 ppm 275 400 150 50 30 4 ppm/mA mV µVPP 75 90 µA 60 mA 65 mA LM4130 LM4130-4.096 Electrical Characteristics Unless otherwise specified VCC = 5.0V, ILOAD = 0 TA = 25˚C. Limits with standard typeface are for TA = 25˚C, and limits in boldface type apply over the operating temperature range. Symbol VREF TCVREF/˚C (Note 6) Parameter Conditions Min (Note 5) Typ (Note 4) Max (Note 5) ± 0.05 ± 0.2 ± 0.1 ± 0.4 ± 0.5 Temperature Coefficient LM4130A, B ppm/˚C 0˚C ≤ TA ≤ +85˚C −40˚C ≤ TA ≤ +85˚C 10 20 LM4130C, D 20 LM4130E ∆VREF/∆VIN Line Regulation Units % Output Voltage Initial Accuracy LM4130-4.096A LM4130-4.096B LM4130-4.096C LM4130-4.096D LM4130-4.096E 30 ILOAD = 100µA VREF + 500 mV ≤ VIN ≤ 5.5V 75 250 400 ppm/V Load Regulation 0 mA ≤ ILOAD ≤ 20 mA 16 60 80 ppm/mA Long-Term Stability (Note 7) 1000 Hrs 50 Thermal Hysteresis (Note 8) −40˚C ≤ TA ≤ +125˚C 50 VIN - VREF Dropout Voltage (Note 9) ILOAD = 10 mA VN Output Noise Voltage 0.1 Hz to 10 Hz IS Supply Current ISC Short Circuit Current ∆VREF/∆ILOAD ∆VREF ppm 275 500 245 50 30 mV µVPP 75 90 µA 60 mA 65 mA Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions. Note 2: Without PCB copper enhancements. The maximum power dissipation must be de-rated at elevated temperatures and is limited by TJMAX (maximum junction temperature), θJ-A (junction to ambient thermal resistance) and TA (ambient temperature). The maximum power dissipation at any temperature is: PDissMAX = (TJMAX − TA)/θJ-A up to the value listed in the Absolute Maximum Ratings. θJ-A for SOT23-5 package is 220˚C/W, TJMAX = 125˚C. Note 3: The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin. The machine model is a 200 pF capacitor discharged directly into each pin. Note 4: Typical numbers are at 25˚C and represent the most likely parametric norm. Note 5: Limits are 100% production tested at 25˚C. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality Control (SQC) methods. The limits are used to calculate National’s Average Outgoing Quality Level (AOQL). Note 6: Temperature coefficient is measured by the ″Box″ method; i.e., the maximum ∆VREF is divided by the maximum ∆T. Note 7: Long term stability is VREF @ 25˚C measured during 1000 hrs. Note 8: Thermal hysteresis is defined as the change in +25˚C output voltage before and after cycling the device from −40˚C to 125˚C. Note 9: Dropout voltage is defined as the minimum input to output differential at which the output voltage drops by 0.5% below the value measured with a 5V input. 5 www.national.com LM4130 LM4130 Typical Performance Characteristics TA = 25˚C, No Load, VIN = 5.0V, unless other- wise noted. Temperature Drift Characteristics Load Regulation vs Temperature DS101046-44 Line Regulation vs Load DS101046-36 Line Regulation vs Temperature DS101046-31 DS101046-17 www.national.com 6 TA = 25˚C, No Load, VIN = 5.0V, unless Dropout vs Load (VREF = 2.5) Output Voltage vs Load Current DS101046-42 DS101046-21 Supply Current vs Temperature Short Circuit Current vs Temperature DS101046-29 DS101046-28 7 www.national.com LM4130 LM4130 Typical Performance Characteristics otherwise noted. (Continued) LM4130 LM4130 Typical Performance Characteristics TA = 25˚C, No Load, VIN = 5.0V, unless otherwise noted. (Continued) Power-Up Response (2.048V) Power-Up Response (4.096V) DS101046-40 Output Impedance DS101046-34 Power Supply Rejection Ratio DS101046-22 DS101046-23 www.national.com 8 TA = 25˚C, No Load, VIN = 5.0V, unless Load Transient Response Line Transient Response DS101046-25 0.1Hz to 10 Hz Noise (VREF = 2.5V) DS101046-26 Output Noise Spectra DS101046-43 DS101046-27 9 www.national.com LM4130 LM4130 Typical Performance Characteristics otherwise noted. (Continued) LM4130 Pin Functions Voltage Reference with Complimentary Output VREF (Pin 5): Reference Output. The output of the LM4130 can source up to 20 mA. It is stable with output capacitor ranges from 0 to 100 µF. VIN (Pin 4):Positive Supply. Bypassing with a 0.1µF capacitor is recommended if the output loading changes or input is noisy. Ground (Pin 2):Negative Supply or Ground Connection. NC (Pins 1, 3):No Connection (internally terminated). These pins must be left unconnected. DS101046-6 Application Information Precision High Current Low Droput Regulator Output Capacitor The LM4130 is designed to operate with or without an output capacitor and is stable with capacitive loads of up to 100µF. Connecting a capacitor between the output and ground will significantly improve the load transient response when switching from a light load to a heavy load. However, the output capacitor should not be made arbitrarily large because it will effect the turn-on time as well as line and load transients. Input Capacitor A small 0.1µF capacitor on the input significantly improves stability under a wide range of load conditions. With an input bypass capacitor, the LM4130 will drive any combination of resistance and capacitance up to VREF/20mA and 100µF respectively. Noise on the power-supply input can effect the output noise, but it can be reduced by using an optional bypass capacitor between the input pin and the ground. DS101046-7 Precision Voltage Reference with Force and Sense Output Printed Circuit Board Layout Consideration References in SOT packages are generally less prone to assembly stress than devices in Small Outline (SOIC) package. To minimize the mechanical stress due to PC board mounting that can cause the output voltage to shift from its initial value, mount the reference on a low flex area of the PC board, such as near the edge or a corner. DS101046-9 Typical Application Circuits Programmable Current Source Precision High Current Low Droput Regulator DS101046-10 DS101046-4 www.national.com 10 LM4130 Typical Application Circuits Supply Splitter (Continued) Precision Regulator with Current Limiting Circuit DS101046-13 DS101046-11 Low Cost Higher Output Current Circuit DS101046-12 * Select R1 to deliver 80% of typical load current. The LM4130 then will source as necessary, up to 20mA, to maintain the output regulation. Care must be taken not to remove the load as the output will be driven to the rail. This approach will effect line regulation. 11 www.national.com LM4130 Precision Micropower Low Dropout Voltage Reference Physical Dimensions inches (millimeters) unless otherwise noted LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 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