NCV4949ADR2G

NCV4949A 100 mA, 5.0 V, Low Dropout Voltage Regulator with Reset and Sense The NCV4949A is a monolithic integrated 5.0 V voltage regulator with a very low dropout and additional functions such as reset and an uncommitted voltage sense comparator. It is designed for supplying microcontroller/microprocessor controlled systems particularly in automotive applications. The NCV4949A has improved reset behavior for lower input and output voltage levels. Features 8 1 http://onsemi.com MARKING DIAGRAM 8 SOIC-8 D SUFFIX CASE 751 1 A L Y W G = Assembly Location = Wafer Lot = Year = Work Week = Pb--Free Device V4949A ALYWD G            Operating DC Supply Voltage Range 5.0 V to 28 V Transient Supply Voltage Up to 40 V Extremely Low Quiescent Current in Standby Mode High Precision Output Voltage 5.0 V 1% Output Current Capability Up to 100 mA Very Low Dropout Voltage Less Than 0.4 V Reset Circuit Sensing The Output Voltage Programmable Reset Pulse Delay Voltage Sense Comparator Thermal Shutdown and Short Circuit Protections NCV Prefix for Automotive and Other Applications Requiring Site and Change Control  These are Pb--Free Devices Output Voltage (Vout) 8 VZ 3 Supply Voltage (VCC) 1 Preregulator 6.0 V 2.0 mA PIN CONNECTIONS VCC Si VZ CT 1 2 3 4 (Top View) 8 7 6 5 Vout So Reset GND CT 4 ORDERING INFORMATION Reset 6 + -Reset 2.0 V Sense Output (So) 7 + -Sense 5 GND 1.23 V See detailed ordering and shipping information in the package dimensions section on page 8 of this data sheet. Regulator Sense Input (Si) 2 1.23 Vref Vs Figure 1. Representative Block Diagram  Semiconductor Components Industries, LLC, 2010 June, 2010 - Rev. 0 - 1 Publication Order Number: NCV4949A/D NCV4949A ABSOLUTE MAXIMUM RATINGS Rating DC Operating Supply Voltage Transient Supply Voltage (t < 1.0 s) Output Current Output Voltage Sense Input Current Sense Input Voltage Output Voltages Reset Output Sense Output Output Currents Reset Output Sense Output Preregulator Output Voltage Preregulator Output Current ESD Protection at any pin Human Body Model Machine Model Thermal Resistance, Junction--to--Air D Suffix, SOIC--8 Plastic Package, Case 751 Operating Junction Temperature Range Storage Temperature Range Symbol VCC VCC TR Iout Vout ISI VSI VReset VSO IReset ISO VZ IZ --RθJA TJ Tstg Value 28 40 Internally Limited 20 1.0 VCC 20 20 mA 5.0 5.0 7.0 5.0 4000 200 C/W 200 --40 to +150 --65 to +150 C C V mA V Unit V V -V mA -V Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. ELECTRICAL CHARACTERISTICS (VCC = 14 V, --40C < TA < 125C, unless otherwise specified.) Characteristic Output Voltage (TA = 25C, Iout = 1.0 mA) Output Voltage (6.0 V < VCC < 28 V, 1.0 mA < Iout < 50 mA) Output Voltage (VCC = 35 V, t < 1.0 s, 1.0 mA < Iout < 50 mA) Dropout Voltage Iout = 10 mA Iout = 50 mA Iout = 100 mA Input to Output Voltage Difference in Undervoltage Condition (VCC = 4.0 V, Iout = 35 mA) Line Regulation (6.0 V < VCC < 28 V, Iout = 1.0 mA) Load Regulation (1.0 mA < Iout < 100 mA) Current Limit Vout = 4.5 V Vout = 0 V Quiescent Current (Iout = 0.3 mA, TA < 100C) Quiescent Current (Iout = 100 mA) Symbol Vout Vout Vout Vdrop Min 4.95 4.9 4.9 ------105 ---Typ 5.0 5.0 5.0 0.1 0.2 0.3 0.2 1.0 8.0 200 100 150 -Max 5.05 5.1 5.1 0.25 0.40 0.50 0.4 20 30 400 -260 5.0 mA mA V mV mV mA Unit V V V V VIO Regline Regload ILim IQSE IQ http://onsemi.com 2 NCV4949A ELECTRICAL CHARACTERISTICS (continued) (VCC = 14 V, --40C < TA < 125C, unless otherwise specified.) Characteristic RESET Reset Threshold Voltage Reset Threshold Hysteresis @ TA = 25C @ TA = --40 to +125C Reset Pulse Delay (CT = 100 nF, tR  100 ms) Reset Reaction Time (CT = 100 nF) Reset Output Low Voltage (RReset = 10 kΩ to Vout, VCC  3.0 V) Reset Output High Leakage Current (VReset = 5.0 V) Delay Comparator Threshold Delay Comparator Threshold Hysteresis SENSE Sense Low Threshold (VSI Decreasing = 1.5 V to 1.0 V) Sense Threshold Hysteresis Sense Output Low Voltage (VSI  1.16 V, VCC  3.0 V, RSO = 10 kΩ to Vout) Sense Output Leakage (VSO = 5.0 V, VSI  1.5 V) Sense Input Current PREREGULATOR Preregulator Output Voltage (IZ = 10 mA) VZ -6.3 -V VSOth VSOth,hys VSOL ISOH ISI 1.16 20 ----1.0 1.23 100 --0.1 1.35 200 0.4 1.0 1.0 V mV V mA mA VResth VResth,hys -50 50 55 -----4.5 100 -100 5.0 --2.0 100 -200 300 180 30 0.4 1.0 --ms ms V mA V mV V mV Symbol Min Typ Max Unit tResD tResR VResL IResH VCTth VCTth, hys PIN FUNCTION DESCRIPTION Pin 1 2 3 4 5 6 7 8 Symbol VCC Si VZ CT GND Reset SO Vout Supply Voltage Input of Sense Comparator Output of Preregulator Reset Delay Capacitor Ground Output of Reset Comparator Output of Sense Comparator Main Regulator Output Description http://onsemi.com 3 NCV4949A TYPICAL CHARACTERIZATION CURVES 60.0 50.0 ESR (Ω) 40.0 30.0 20.0 10.0 0 0 10 20 30 40 50 60 Unstable Region Vin = 13.5 V Cout = 10 mF ESR (Ω) 0.5 0.4 0.3 0.2 0.1 Stable Region 70 80 90 100 0 0 10 20 30 40 50 60 Unstable Region 70 80 90 100 Stable Region Vin = 13.5 V Cout = 10 mF OUTPUT CURRENT (mA) OUTPUT CURRENT (mA) Figure 2. ESR Stability Border Vs. Output Current (Full ESR Range) Figure 3. ESR Stability Border Vs. Output Current (Very Low ESR) 5.04 Vout , OUTPUT VOLTAGE (V) 5.03 5.02 5.01 5 4.99 4.98 4.97 4.96 --40 Vout , OUTPUT VOLTAGE (V) VCC = 14 V Iout = 1.0 mA 6 5 4 3 2 1 0 0 1 2 RL = 100 Ω RL = 5 kΩ TJ = 25C --20 0 20 40 60 80 100 120 3 4 5 6 7 8 9 10 TJ, JUNCTION TEMPERATURE (C) VCC, SUPPLY VOLTAGE (V) Figure 4. Output Voltage versus Junction Temperature Figure 5. Output Voltage versus Supply Voltage 250 Vdrop , DROPOUT VOLTAGE (mV) Vdrop , DROPOUT VOLTAGE (mV) TJ = 25C 200 150 100 50 0 0.40 Iout = 100 mA 0.30 0.20 Iout = 50 mA Iout = 10 mA 0.10 0.1 1.0 10 100 0 --40 --20 0 20 40 60 80 100 120 Iout, OUTPUT CURRENT (mA) TJ, JUNCTION TEMPERATURE (C) Figure 6. Dropout Voltage versus Output Current Figure 7. Dropout Voltage versus Junction Temperature http://onsemi.com 4 NCV4949A TYPICAL CHARACTERIZATION CURVES (continued) 3.0 IQ, QUIESCENT CURRENT (mA) 2.5 2.0 1.5 1.0 0.5 0 0.1 1.0 10 100 IQ, QUIESCENT CURRENT (mA) VCC = 14 V TJ = 25C 3.0 2.5 2.0 1.5 1.0 0.5 0 0 5.0 10 15 RL = 5.0 k 20 25 30 RL = 100 Ω TJ = 25C Iout, OUTPUT CURRENT (mA) VCC, SUPPLY VOLTAGE (V) Figure 8. Quiescent Current versus Output Current Figure 9. Quiescent Current versus Supply Voltage TJ = 25C VReset , RESET OUTPUT (V) 5.0 4.0 3.0 2.0 1.0 0 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5.0 Resistor 10 k from Reset Output to 5.0 V VReset , RESET THRESHOLD VOLTAGE (V) 6.0 4.7 4.66 4.62 4.58 4.54 4.5 4.46 4.42 --40 --20 0 20 40 60 80 100 120 Lower Threshold Upper Threshold Vout, OUTPUT VOLTAGE (V) TJ, JUNCTION TEMPERATURE (C) Figure 10. Reset Output versus Regulator Output Voltage 6.0 VSO , SENSE OUTPUT VOLTAGE (V) 5.0 4.0 3.0 2.0 1.0 0 1.0 1.05 1.1 1.15 1.2 1.25 1.3 1.35 1.4 1.45 1.5 TJ = 25C Resistor 10 k from Sense Output to 5.0 V VSI, SENSE INPUT VOLTAGE (V) 1.4 1.38 1.36 1.34 1.32 1.3 1.28 1.26 1.24 1.22 1.2 --40 Figure 11. Reset Thresholds versus Junction Temperature Upper Threshold Lower Threshold --20 0 20 40 60 80 100 120 VSI, SENSE INPUT VOLTAGE (V) TJ, JUNCTION TEMPERATURE (C) Figure 12. Sense Output versus Sense Input Voltage Figure 13. Sense Thresholds versus Junction Temperature http://onsemi.com 5 NCV4949A APPLICATION INFORMATION Supply Voltage Transient High supply voltage transients can cause a reset output signal perturbation. For supply voltages greater than 8.0 V the circuit shows a high immunity of the reset output against supply transients of more than 100 V/ms. For supply voltages less than 8.0 V supply transients of more than 0.4 V/ms can cause a reset signal perturbation. To improve the transient behavior for supply voltages less than 8.0 V a capacitor at Pin 3 can be used. A capacitor at Pin 3 (C3  1.0 mF) also reduces the output noise. C3 VZ (optional) Vbat Cs VCC 1 Preregulator 6.0 V Vout CO 3 8 CT 4 2.0 mA 6 10 kΩ Regulator VCC Si 2 + -1.23 Vref Sense 1.23 V Reset + -2.0 V Reset Vout RSO 10 kΩ So 7 5 GND NOTE: 1. For stability: Cs  1.0 mF, CO  4.7 mF, ESR < 10 Ω at 10 kHz 2. Recommended for application: Cs = 10 mF, CO = 10 mF to 74 mF @ TA = 125C By using higher Cs it is possible to use higher CO. Figure 14. Application Schematic http://onsemi.com 6 NCV4949A OPERATING DESCRIPTION The NCV4949A is a monolithic integrated low dropout voltage regulator. Several outstanding features and auxiliary functions are implemented to meet the requirements of supplying microprocessor systems in automotive applications. It is also suitable in other applications where the included functions are required. The modular approach of this device allows the use of other features and functions independently when required. Voltage Regulator Vout 5.0 V Vout IQ, QUIESCENT CURRENT (mA) The voltage regulator uses an isolated collector vertical PNP transistor as a regulating element. With this structure, very low dropout voltage at currents up to 100 mA is obtained. The dropout operation of the standby regulator is maintained down to 3.0 V input supply voltage. The output voltage is regulated up to a transient input supply voltage of 35 V. A typical curve showing the standby output voltage as a function of the input supply voltage is shown in Figure 16. The current consumption of the device (quiescent current) is less than 200 mA. To reduce the quiescent current peak in the undervoltage region and to improve the transient response in this region, the dropout voltage is controlled. The quiescent current as a function of the supply input voltage is shown in Figure 17. Short Circuit Protection: 0V 2.0 V 5.0 V VCC 35 V Figure 16. Output Voltage versus Supply Voltage 3.0 2.5 2.0 1.5 1.0 0.5 0 0 5.0 10 15 RL = 5.0 k 20 25 30 RL = 100 Ω TJ = 25C The maximum output current is internally limited. In case of short circuit, the output current is foldback current limited as described in Figure 15. 6.00 5.00 4.00 Vout (V) 3.00 2.00 1.00 0.00 0 50 100 150 200 Iout (mA) 250 300 350 VCC, SUPPLY VOLTAGE (V) Figure 17. Quiescent Current versus Supply Voltage Preregulator To improve transient immunity a preregulator stabilizes the internal supply voltage to 6.0 V. This internal voltage is present at Pin 3 (VZ). This voltage should not be used as an output because the output capability is very small ( 100 mA). This output may be used to improve transient behavior for supply voltages less than 8.0 V. In this case a capacitor (100 nF - 1.0 mF) must be connected between Pin 3 and GND. If this feature is not used Pin 3 must be left open. Figure 15. Foldback Characteristic of Vout http://onsemi.com 7 NCV4949A Reset Circuit The block circuit diagram of the reset circuit is shown in Figure 18. The reset circuit supervises the output voltage. The reset threshold of 4.5 V is defined by the internal reference voltage and standby output divider. The reset pulse delay time tRD, is defined by the charge time of an external capacitor CT: t RD = C x 2.0 V T 2.0 mA Output voltage drops below the reset threshold only marginally longer than the reaction time results in a shorter reset delay time. The nominal reset delay time will be generated for output voltage drops longer than approximately 50ms. The typical reset output waveforms are shown in Figure 19. Vout 5.0 V VRT + 0.1 V VRT 3.0 V tR Reset tRD tRR Input Drop tRD Dump Output Overload Switch Off Vin Vout1 40 V The reaction time of the reset circuit originates from the discharge time limitation of the reset capacitor CT and is proportional to the value of CT. The reaction time of the reset circuit increases the noise immunity. 1.23 V Vref 22 k Out 2.0 mA Reset CT + -Reg 2.0 V t Switch On Figure 19. Typical Reset Output Waveforms Sense Comparator Figure 18. Reset Circuit The sense comparator compares an input signal with an internal voltage reference of typical 1.23 V. The use of an external voltage divider makes this comparator very flexible in the application. It can be used to supervise the input voltage either before or after a protection diode and to provide additional information to the microprocessor such as low voltage warnings. ORDERING INFORMATION Device NCV4949ADR2G* Operating Temperature Range TJ = --40C to +125C Package SOIC--8 (Pb--Free) Shipping† 2500 Units / Tape & Reel †For information on tape and reel specifications,including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. *NCV4949A: Tlow = --40C, Thigh = +125C. Guaranteed by design. NCV prefix is for automotive and other applications requiring site and change control. http://onsemi.com 8 NCV4949A PACKAGE DIMENSIONS SOIC- NB -8 CASE 751--07 ISSUE AJ --XNOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSION A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. 6. 751--01 THRU 751--06 ARE OBSOLETE. NEW STANDARD IS 751--07. DIM A B C D G H J K M N S MILLIMETERS MIN MAX 4.80 5.00 3.80 4.00 1.35 1.75 0.33 0.51 1.27 BSC 0.10 0.25 0.19 0.25 0.40 1.27 0_ 8_ 0.25 0.50 5.80 6.20 INCHES MIN MAX 0.189 0.197 0.150 0.157 0.053 0.069 0.013 0.020 0.050 BSC 0.004 0.010 0.007 0.010 0.016 0.050 0_ 8_ 0.010 0.020 0.228 0.244 A 8 5 B 1 S 4 0.25 (0.010) M Y M --YG K C --ZH D 0.25 (0.010) M SEATING PLANE N X 45 _ 0.10 (0.004) M J ZY S X S SOLDERING FOOTPRINT* 1.52 0.060 7.0 0.275 4.0 0.155 0.6 0.024 1.270 0.050 SCALE 6:1 mm inches *For additional information on our Pb--Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC 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. “Typical” parameters which may be provided in SCILLC 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. SCILLC does not convey any license under its patent rights nor the rights of others. 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