NCV ma Micropower Precision Voltage Reference

Transcription

1 NCV51 ma Micropower Precision Voltage Reference The NCV51 is a high performance, low power precision voltage reference. This device combines very high accuracy, low power dissipation and small package size. It can supply output current up to ma at a. V fixed output voltage with excellent line and load regulation characteristics making it ideal for precision regulator applications. It is designed to be stable with or without an output capacitor. The protective features include Short Circuit and Reverse Input Voltage Protection. The NCV51 is packaged in a lead surface mount SOT package. Features Fixed Output Voltage. V Accuracy 1% over C to +15 C Wide Input Voltage Range up to 8 V Low Quiescent Current Low Noise Reverse Input Voltage Protection Stable Without an Output Capacitor Available in leads SOT Package NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AECQ1 Qualified and PPAP Capable These Devices are PbFree, Halogen Free/BFR Free and are RoHS Compliant Typical Applications Precision Regulators, High Accuracy Micropower Supplies Data Acquisition Systems Instrument Equipment Cameras, Camcorders, Sensors SOT SN1 SUFFIX CASE 18 MARKING DIAGRAM AND PIN ASSIGNMENT 1 GND JJM (Top View) JJ = Specific Device Code M = Date Code = PbFree Package (Note: Microdot may be in either location) ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 1 of this data sheet. =. to 8 V C IN.1 F NCV51 (. V fixed) GND. V Figure 1. Typical Application Schematics Semiconductor Components Industries, LLC, 17 March, 17 Rev. 1 Publication Order Number: NCV51/D

2 NCV51 ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Table 1. PIN FUNCTION DESCRIPTION ÁÁÁÁÁ Pin No. ÁÁÁÁÁÁ Pin Name ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Description ÁÁÁÁÁ 1 ÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Positive Input Voltage ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Regulated Output Voltage ÁÁÁÁÁ ÁÁÁÁÁÁ GND ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Power Supply Ground; Device Substrate Table. MAXIMUM RATINGS Rating Symbol Value Unit Input Voltage (Note 1) V Reverse Input Voltage 15 V Output Short Circuit Duration, T A = 5 C 7 V > 7 V Operating Ambient Temperature Range T A to 15 C Maximum Junction Temperature T J(max) 15 C Storage Temperature Range T STG 5 to 15 C ESD Capability, Human Body Model (Note ) ESD HBM V ESD Capability, Machine Model (Note ) ESD MM V Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. 1. Refer to ELECTRICAL CHARACTERISTICS and APPLICATION INFORMATION for Safe Operating Area.. This device series incorporates ESD protection and is tested by the following methods: ESD Human Body Model tested per AECQ1 (EIA/JESDA11) ESD Machine Model tested per AECQ1 (EIA/JESDA115) Latch up Current Maximum Rating: ±15 ma per JEDEC standard: JESD78. Table. THERMAL CHARACTERISTICS Thermal Characteristics, SOT package Thermal Resistance, JunctiontoAmbient (Note ). Soldered on 1 oz 5 mm FR copper area. Table. RECOMMENDED OPERATING RANGES t SC Rating Symbol Value Unit 5 sec R JA C/W Rating Symbol Min Max Unit Operating Input Voltage (Note ) V Operating Ambient Temperature Range T A 15 C Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended Operating Ranges limits may affect device reliability.. Refer to ELECTRICAL CHARACTERISTICS and APPLICATION INFORMATION for Safe Operating Area.

3 NCV51 Table 5. ELECTRICAL CHARACTERISTICS ( = +.5 V, I OUT =, C IN =.1 F, C OUT = F; For typical values T A = 5 C, for min/max values C T A 15 C unless otherwise noted.) (Note 5). Parameter Test Conditions Symbol Min Typ Max Unit Output Voltage.7 (1%).. (+1%) V Line Regulation = +.9 V to +.5 V = +.5 V to + V Reg LINE ppm/v Load Regulation I OUT = to 1 A I OUT = to 1 ma I OUT = to ma Reg LOAD ppm/ma Dropout Voltage Measured at % V DO V Quiescent Current, T A = 5 C, C T A 1 C I Q 1 A Output Short Circuit Current = V, T A = 5 C I SC 8 ma Reverse Leakage = 15 V, T A = 5 C I LEAK.1 1 A Output Noise Voltage (Note ) f =.1 Hz to 1 Hz f = 1 Hz to 1 khz V N 1 18 V PP V rms Output Voltage Temperature Coefficient C T A 1 C C T A 15 C T CO 18 ppm/ C Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions. 5. Performance guaranteed over the indicated operating temperature range by design and/or characterization, tested at T J = T A = 5 C. Low duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible.. The noise spectral density from.1 Hz to 1 Hz is measured, then the integral output noise voltage in this range is calculated. Finally the peak to peak noise is calculated as 5x integral output noise. TYPICAL CHARACTERISTICS, OUTPUT VOLTAGE (V) C OUT = F = + V = +.5 V = +.9 V Figure. Output Voltage vs. Temperature, OUTPUT VOLTAGE (V) = +.5 V C OUT = F I OUT = ma Figure. Output Voltage vs. Temperature

4 NCV51 TYPICAL CHARACTERISTICS, OUTPUT VOLTAGE (V) C OUT = F Unit 1 Three Typical Parts Unit Unit Figure. Output Voltage vs. Temperature V DROP, DROPOUT VOLTAGE (V) C OUT = F 1. I O = ma.9 I O = 1 ma.8.7 I O = 5 ma. I O = ma I O = 1 ma Figure 5. Dropout Voltage I Q, QUIESCENT CURRENT ( A) C OUT = F T J = 5 C T J = 15 C T J = 5 C , INPUT VOLTAGE (V) Figure. Quiescent Current REG LINE, LINE REGULATION (mv) C OUT = F = 5.8 to. V = 5.8 to 18. V = 5.8 to 15. V = 5.8 to 1. V Figure 7. Line Regulation = 5.8 to 9. V REG LOAD, LOAD REGULATION (mv) C OUT = F I OUT = to 1 ma I OUT = to ma I OUT = to 1 ma I OUT = to 15 ma I OUT = to 5 ma Figure 8. Load Regulation Sourcing LOAD REG, LOAD REGULATION (mv) C OUT = F down to ma down to 1. ma down to 1.5 ma I OUT = A down to 5 A Figure 9. Load Regulation Sinking

5 NCV51 TYPICAL CHARACTERISTICS I SC, SHORT CIRCUIT CURRENT (ma) PSRR, POWER SUPPLY REJECTION RATIO (db) PSRR, POWER SUPPLY REJECTION RATIO (db) = 8 V = 15 V Figure 1. Short Circuit Current C OUT = F DC 5 mvac I OUT = ma 1 C OUT =.1 F MLCC T J = 5 C k 1k 1M f, FREQUENCY Figure 1. Power Supply Rejection Ratio C out =.1 F, C OUT = F, T A = 5 C f RIPPLE = 1 Hz f RIPPLE = 1 khz f RIPPLE = 1 khz f RIPPLE = 1 MHz , INPUT VOLTAGE (V) Figure 1. Power Supply Rejection Ratio vs. Input Voltage PSRR, POWER SUPPLY REJECTION RATIO (db) PSRR, POWER SUPPLY REJECTION RATIO (db) PSRR, POWER SUPPLY REJECTION RATIO (db) I OUT = ma DC 5 mvac 1 C OUT = F T J = 5 C k 1k 1M f, FREQUENCY I OUT = ma Figure 11. Power Supply Rejection Ratio C out = F I OUT = ma DC 5 mvac C 1 OUT = 1 F MLCC T J = 5 C k 1k 1M f, FREQUENCY Figure 1. Power Supply Rejection Ratio C out = 1 F I OUT = ma, C OUT = F, T A = 5 C f RIPPLE = 1 Hz f RIPPLE = 1 khz f RIPPLE = 1 khz f RIPPLE = 1 MHz , INPUT VOLTAGE (V) Figure 15. Power Supply Rejection Ratio vs. Input Voltage 5

6 NCV51 TYPICAL CHARACTERISTICS V n, OUTPUT NOISE ( V rms /rthz) , C OUT = F, T A = 5 C.1 Hz 1 Hz Integral Noise: V n =.8 V rms Figure 1. Output Voltage Noise.1 Hz 1 Hz V n, OUTPUT NOISE ( V rms /rthz) to ma, C OUT = F, T A = 5 C 1 Hz 1 khz Integral Noise: V n = 18 V rms k 1k 1M Figure 17. Output Voltage Noise 1 Hz 1 MHz V n, OUTPUT NOISE ( V rms /rthz) to ma, C OUT =.1 F MLCC, T A = 5 C.. I OUT = ma k 1k 1M V n, OUTPUT NOISE ( V rms /rthz) to ma, C OUT = 1 F MLCC, T A = 5 C I OUT = ma k 1k 1M Figure 18. Output Voltage Noise 1 Hz 1 MHz C OUT =.1 F Figure 19. Output Voltage Noise 1 Hz 1 MHz C OUT = 1 F V n, OUTPUT NOISE ( V rms /rthz) to ma, C OUT = 1 F MLCC, T A = 5 C I OUT = ma k 1k 1M Figure. Output Voltage Noise 1 Hz 1 MHz C OUT = 1 F, OUTPUT VOLTAGE (5 mv/div) = to 5.8 V, C OUT = F, t rise_fall = 1 ma/1 s, T A = 5 C TIME ( s/div) Figure 1. Load Transient Response 1 ma

7 NCV51 TYPICAL CHARACTERISTICS, OUTPUT VOLTAGE ( mv/div) I OUT = ma, C OUT = F, t rise_fall = ma/1 s, T A = 5 C, OUTPUT VOLTAGE (1 mv/div) C OUT = F C OUT =.1 F MLCC C OUT = 1 F MLCC C OUT =.7 F MLCC, T A = 5 C, t rise_fall = 1 ma/1 s TIME (1 s/div) Figure. Load Transient Response ma TIME (5 s/div) Figure. Load Transient Responses C OUT =.7 F, INPUT VOLTAGE ( V/DIV), INPUT VOLTAGE ( V/DIV), OUTPUT VOLT- AGE (1 V/DIV) 1 = V to 5.8 V, C IN = F, C OUT = F,, T A = 5 C, t rise = s, OUTPUT VOLT- AGE (1 V/DIV) 1 to V, C OUT = C IN = F,, T A = 5 C, t rise_fall = 5 s TIME (1 s/div) TIME (5 s/div) Figure. TurnOn Figure 5. TurnOff 7

8 NCV51 APPLICATIONS INFORMATION Input Decoupling Capacitor (C IN ) It is recommended to connect a.1 F Ceramic capacitor between and GND pin of the device. This capacitor will provide a low impedance path for unwanted AC signals or noise present on the input voltage. The input capacitor will also limit the influence of input trace inductances and Power Supply resistance during sudden load current changes. Higher capacitances will improve the Power Supply Rejection Ratio and line transient response. Output Decoupling Capacitor (C OUT ) The NCV51 was designed to be stable without an additional output capacitor. Without the output capacitor the settling times during Reference Turnon or Turnoff can be as short as s (Refer to Figure and 5). The Load Transient Responses without C OUT (Figure 1 and ) show good stability of NCV51 even for fast output current changes from ma to full load. If smaller deviations during load current changes are required, it is possible to add some external capacitance as shown on Figure. =. to 8 V C IN.1 F V OUT NCV51. V (. V fixed) GND C OUT Figure. Output Capacitor Connection The C OUT will reduce the overshoot and undershoot but will increase the settling time and can introduce some ringing of the output voltage during fast load transients. NCV51 behavior for different values of ceramic X7R output capacitors is depicted on Figure. The Output Voltage ringing and settling times can be reduced by using some additional resistance in series with the Ceramic Capacitor or by using Tantalum or Aluminum Capacitors which have higher ESR values. Figure 7 below shows the Load Transient improvement after adding an additional series resistor to a 1 F Ceramics Capacitor., OUTPUT VOLTAGE (5 mv/div) TIME (5 s/div) Figure 7. C OUT = 1 F MLCC + C OUT = 1 F MLCC, T A = 5 C, t rise_fall = 1 ma/1 s The device was determined to be stable with Aluminum, Ceramic and Tantalum Capacitors with capacitances ranging from to 1 F at T A = 5 C. TurnOn Response It is possible to achieve very fast TurnOn time when fast ramp is applied to NCV51 input as shown on Figure. However if the Input Voltage change from V to nominal Input Voltage is extremely fast, the Output Voltage settling time will increase. Figure 8 below shows this effect when the Input Voltage change is 5.8 V / s., INPUT VOLTAGE ( V/DIV), OUTPUT VOLT- AGE (1 V/DIV) 1 TIME (1 s/div) Figure 8. = V to 5.8 V, C IN = F, C OUT = F,, T A = 5 C, t rise = 5 s 8

9 NCV51 A.1 F or larger input capacitor will help to decrease the dv/dt of the input voltage and improve stability during large load current changes. During the TurnOn for certain conditions the output voltage can exhibit an overshoot. The amount of the overshoot strongly depends on application conditions i.e. input voltage level, slew rate, input and output capacitors, and output current. The maximum value of the overshoot isn t guaranteed for this device. The figure below shows an example of the TurnOn overshoot., INPUT VOLTAGE ( V/DIV), OUTPUT VOLT- AGE (1 V/DIV) 1 TIME (1 s/div) Figure 9. = V to V, C OUT = F,, T A = 5 C, t rise = s TurnOff Response The TurnOff response time is directly proportional to the output capacitor value and inversely proportional to the load value. The NCV51 device does not have any dedicated internal circuitry to discharge the output capacitor when the input voltage is turnedoff or disconnected. This is why when large output capacitors are used and very small output current is drawn, it can take a considerable amount of time to discharge the capacitor. If short turnoff times are required, the output capacitor value should be minimized i.e. with no output capacitor a s turnoff time can be achieved. Protection Features The NCV51 device is equipped with reverse input voltage protection which will help to protect the device when Input voltage polarity is reversed. In this circumstance the Input current will be minimized to typically less than.1 A. The short circuit protection will protect the device under the condition that the is suddenly shorted to ground. The short circuit protection will work properly up to an Input Voltage of 7 V at T A = 5 C. Depending on the PCB trace width and thickness, air flow and process spread this value can be slightly different and should be confirmed in the end application. No external voltage source should be connected directly to the pin of NCV51 regulator. If the external source forces the output voltage to be greater than the nominal output voltage level, the current will start to flow from the Voltage Source to the pin. This current will increase with the Output Voltage applied and can cause damage to the device if > 1 V Typ. at 5 C (Figure ). I O, CURRENT INTO PIN (ma) C OUT = F, T A = 5 C , OUTPUT VOLTAGE (V) Figure. Output Noise The NCV51 Output Voltage Noise strongly depends on the output capacitor value and load value. This is caused by the fact that the bandwidth of the Reference is inversely proportional to the capacitor value and directly proportional to the output current. The Reference bandwidth directly determines the point where the output voltage noise starts to fall. This can be observed at the Figure 1 below. V n, OUTPUT VOLTAGE NOISE ( V rms /rthz).., C OUT = 1 F MLCC, 1. T A = 5 C C OUT =.1 F C OUT = 1. F C OUT = 1 F. C OUT = F k 1k 1M Figure 1. 9

10 NCV51 The peaks which are visible on the noise spectrum are reflecting the stability of the NCV51 device. In the comparison in Figure 1 it can be noticed that F and 1 F cases represents the best stability. Thermal Characteristics As power dissipation in the NCV51 increases, it may become necessary to provide some thermal relief. The maximum power dissipation supported by the device is dependent upon board design and layout. The board material and the ambient temperature affect the rate of junction temperature rise for the part. The maximum power dissipation the NCV51 can handle is given by: P D(MAX) [T J(MAX) T A ] (eq. 1) R JA Since T J is not recommended to exceed 1 C (T J(MAX) ), then the NCV51 can dissipate up to 5 mw when the ambient temperature (T A ) is 5 C. The power dissipated by the NCV51 can be calculated from the following equations: P D (I OUT ) I OUT ( ) (eq. ) or (MAX) P D(MAX) ( I OUT ) I OUT I Q (eq. ) PCB Layout Recommendations and GND printed circuit board traces should be as wide as possible. When the impedance of these traces is high, there is a chance to pick up noise and cause the regulator to malfunction. Place external components, especially the output capacitor, as close as possible to the NCV51, and make traces as short as possible. ORDERING INFORMATION Device Marking Package Shipping NCV51SNT1G JJ SOT (PbFree), / Tape & Reel For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD811/D. 1

11 NCV51 PACKAGE DIMENSIONS SOT (TO) CASE 188 ISSUE AP A E A1 D 1 e b HE SEE VIEW C c.5 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y1.5M, CONTROLLING DIMENSION: INCH.. MAXIMUM LEAD THICKNESS INCLUDES LEAD FINISH THICKNESS. MINIMUM LEAD THICKNESS IS THE MINIMUM THICKNESS OF BASE MATERIAL.. DIMENSIONS D AND E DO NOT INCLUDE MOLD FLASH, PROTRUSIONS, OR GATE BURRS. MILLIMETERS INCHES DIM MIN NOM MAX MIN NOM MAX A A b c D E e L L H E L L1 VIEW C SOLDERING FOOTPRINT* SCALE 1:1 mm inches *For additional information on our PbFree strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor s product/patent coverage may be accessed at /site/pdf/patentmarking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information provided by ON Semiconductor. Typical parameters which may be provided in ON Semiconductor data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including Typicals must be validated for each customer application by customer s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA Class medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor 1951 E. nd Pkwy, Aurora, Colorado 811 USA Phone: or 88 Toll Free USA/Canada Fax: 7517 or 887 Toll Free USA/Canada orderlit@onsemi.com N. American Technical Support: Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: Japan Customer Focus Center Phone: ON Semiconductor Website: Order Literature: For additional information, please contact your local Sales Representative NCV51/D