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. http://onsemi.com MARKING DIAGRAM 8 SOIC--8 D SUFFIX CASE 751 8 Features 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) CT 4 1 A L Y W G = Assembly Location = Wafer Lot = Year = Work Week = Pb--Free Device PIN CONNECTIONS VCC 1 8 Vout Si 2 7 So VZ 3 6 Reset CT 4 5 GND (Top View) Preregulator 6.0 V 1 1 V4949A ALYWD G ORDERING INFORMATION 2.0 mA Reset See detailed ordering and shipping information in the package dimensions section on page 8 of this data sheet. 6 + -- Regulator Sense Input (Si) 2.0 V Sense Output (So) Reset Vs 7 2 + -- 1.23 Vref 1.23 V Sense 5 GND 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 Symbol Value Unit VCC 28 V VCC TR 40 V Output Current Iout Internally Limited -- Output Voltage DC Operating Supply Voltage Transient Supply Voltage (t < 1.0 s) Vout 20 V Sense Input Current ISI 1.0 mA Sense Input Voltage VSI VCC -- Output Voltages Reset Output Sense Output VReset VSO 20 20 Output Currents Reset Output Sense Output IReset ISO 5.0 5.0 Preregulator Output Voltage VZ 7.0 V Preregulator Output Current IZ 5.0 mA ESD Protection at any pin Human Body Model Machine Model --- 4000 200 V mA V Thermal Resistance, Junction--to--Air D Suffix, SOIC--8 Plastic Package, Case 751 RθJA C/W 200 Operating Junction Temperature Range TJ --40 to +150 C Storage Temperature Range Tstg --65 to +150 C 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, --40C < TA < 125C, unless otherwise specified.) Characteristic Symbol Min Typ Max Unit Output Voltage (TA = 25C, Iout = 1.0 mA) Vout 4.95 5.0 5.05 V Output Voltage (6.0 V < VCC < 28 V, 1.0 mA < Iout < 50 mA) Vout 4.9 5.0 5.1 V Output Voltage (VCC = 35 V, t < 1.0 s, 1.0 mA < Iout < 50 mA) Vout 4.9 5.0 5.1 V Dropout Voltage Iout = 10 mA Iout = 50 mA Iout = 100 mA Vdrop ---- 0.1 0.2 0.3 0.25 0.40 0.50 VIO -- 0.2 0.4 V Line Regulation (6.0 V < VCC < 28 V, Iout = 1.0 mA) Regline -- 1.0 20 mV Load Regulation (1.0 mA < Iout < 100 mA) Regload -- 8.0 30 mV 105 -- 200 100 400 -- Input to Output Voltage Difference in Undervoltage Condition (VCC = 4.0 V, Iout = 35 mA) V Current Limit Vout = 4.5 V Vout = 0 V ILim Quiescent Current (Iout = 0.3 mA, TA < 100C) IQSE -- 150 260 mA IQ -- -- 5.0 mA Quiescent Current (Iout = 100 mA) http://onsemi.com 2 mA NCV4949A ELECTRICAL CHARACTERISTICS (continued) (VCC = 14 V, --40C < TA < 125C, unless otherwise specified.) Characteristic Symbol Min Typ Max Unit VResth -- 4.5 -- V 50 50 100 -- 200 300 RESET Reset Threshold Voltage Reset Threshold Hysteresis @ TA = 25C @ TA = --40 to +125C VResth,hys mV Reset Pulse Delay (CT = 100 nF, tR 100 ms) tResD 55 100 180 ms Reset Reaction Time (CT = 100 nF) tResR -- 5.0 30 ms Reset Output Low Voltage (RReset = 10 kΩ to Vout, VCC 3.0 V) VResL -- -- 0.4 V Reset Output High Leakage Current (VReset = 5.0 V) IResH -- -- 1.0 mA Delay Comparator Threshold VCTth -- 2.0 -- V VCTth, hys -- 100 -- mV VSOth 1.16 1.23 1.35 V VSOth,hys 20 100 200 mV Sense Output Low Voltage (VSI 1.16 V, VCC 3.0 V, RSO = 10 kΩ to Vout) VSOL -- -- 0.4 V Sense Output Leakage (VSO = 5.0 V, VSI 1.5 V) ISOH -- -- 1.0 mA ISI --1.0 0.1 1.0 mA VZ -- 6.3 -- V Delay Comparator Threshold Hysteresis SENSE Sense Low Threshold (VSI Decreasing = 1.5 V to 1.0 V) Sense Threshold Hysteresis Sense Input Current PREREGULATOR Preregulator Output Voltage (IZ = 10 mA) PIN FUNCTION DESCRIPTION Pin Symbol Description 1 VCC 2 Si Input of Sense Comparator 3 VZ Output of Preregulator 4 CT Reset Delay Capacitor 5 GND Ground 6 Reset Output of Reset Comparator 7 SO Output of Sense Comparator 8 Vout Main Regulator Output Supply Voltage http://onsemi.com 3 NCV4949A TYPICAL CHARACTERIZATION CURVES 60.0 0.5 Unstable Region Vin = 13.5 V Cout = 10 mF 40.0 30.0 0.3 0.2 20.0 0.1 10.0 0 Stable Region Vin = 13.5 V Cout = 10 mF 0.4 ESR (Ω) ESR (Ω) 50.0 Stable Region 0 10 20 30 40 50 60 70 80 Unstable Region 90 0 100 0 10 20 30 OUTPUT CURRENT (mA) 5.02 5.01 5 4.99 4.98 --20 3 90 100 0 20 40 60 80 100 RL = 5 kΩ 2 RL = 100 Ω 1 0 120 0 1 2 3 4 5 6 7 8 9 10 VCC, SUPPLY VOLTAGE (V) Figure 4. Output Voltage versus Junction Temperature Figure 5. Output Voltage versus Supply Voltage 250 0.40 TJ = 25C Vdrop , DROPOUT VOLTAGE (mV) Vdrop , DROPOUT VOLTAGE (mV) 80 4 TJ, JUNCTION TEMPERATURE (C) 200 150 100 50 0 70 TJ = 25C 5 4.97 4.96 --40 60 6 VCC = 14 V Iout = 1.0 mA Vout , OUTPUT VOLTAGE (V) Vout , OUTPUT VOLTAGE (V) 5.03 50 Figure 3. ESR Stability Border Vs. Output Current (Very Low ESR) Figure 2. ESR Stability Border Vs. Output Current (Full ESR Range) 5.04 40 OUTPUT CURRENT (mA) 0.1 1.0 10 Iout = 50 mA 0.20 Iout = 10 mA 0.10 0 --40 100 Iout = 100 mA 0.30 Iout, OUTPUT CURRENT (mA) --20 0 20 40 60 80 100 TJ, JUNCTION TEMPERATURE (C) Figure 6. Dropout Voltage versus Output Current Figure 7. Dropout Voltage versus Junction Temperature http://onsemi.com 4 120 NCV4949A TYPICAL CHARACTERIZATION CURVES (continued) 3.0 VCC = 14 V TJ = 25C 2.5 IQ, QUIESCENT CURRENT (mA) IQ, QUIESCENT CURRENT (mA) 3.0 2.0 1.5 1.0 0.5 0 0.1 1.0 10 2.0 RL = 100 Ω 1.5 1.0 0.5 0 100 TJ = 25C 2.5 RL = 5.0 k 0 5.0 10 VReset , RESET THRESHOLD VOLTAGE (V) 6.0 VReset , RESET OUTPUT (V) TJ = 25C 5.0 Resistor 10 k from Reset Output to 5.0 V 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 4.66 4.62 4.58 4.54 4.5 Lower Threshold 4.46 4.42 --40 --20 0 60 80 100 120 1.4 VSI, SENSE INPUT VOLTAGE (V) VSO , SENSE OUTPUT VOLTAGE (V) 40 TJ, JUNCTION TEMPERATURE (C) TJ = 25C Resistor 10 k from Sense Output to 5.0 V 2.0 1.0 0 1.0 20 Figure 11. Reset Thresholds versus Junction Temperature 6.0 3.0 30 Upper Threshold Vout, OUTPUT VOLTAGE (V) 4.0 25 4.7 Figure 10. Reset Output versus Regulator Output Voltage 5.0 20 Figure 9. Quiescent Current versus Supply Voltage Figure 8. Quiescent Current versus Output Current 4.0 15 VCC, SUPPLY VOLTAGE (V) Iout, OUTPUT CURRENT (mA) 1.05 1.1 1.15 1.2 1.25 1.3 1.35 1.4 1.45 1.38 1.36 1.34 1.32 1.3 1.28 1.26 Lower Threshold 1.24 1.22 1.2 --40 1.5 Upper Threshold VSI, SENSE INPUT VOLTAGE (V) --20 0 20 40 60 80 100 TJ, JUNCTION TEMPERATURE (C) Figure 12. Sense Output versus Sense Input Voltage Figure 13. Sense Thresholds versus Junction Temperature http://onsemi.com 5 120 NCV4949A APPLICATION INFORMATION Supply Voltage Transient 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. 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 Vout C3 VZ (optional) Vbat VCC Cs 3 CO 8 CT 4 Preregulator 6.0 V 1 2.0 mA Reset 6 10 kΩ + -- Regulator Reset VCC RSO 10 kΩ So Si 7 2 + -1.23 Vref Sense 5 GND NOTE: Vout 2.0 V 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 = 125C By using higher Cs it is possible to use higher CO. Figure 14. Application Schematic http://onsemi.com 6 1.23 V 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. Vout Vout 5.0 V Voltage Regulator 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. 0V 35 V VCC IQ, QUIESCENT CURRENT (mA) 3.0 The maximum output current is internally limited. In case of short circuit, the output current is foldback current limited as described in Figure 15. 2.5 TJ = 25C 2.0 RL = 100 Ω 1.5 1.0 0.5 0 0 RL = 5.0 k 5.0 10 15 20 25 30 VCC, SUPPLY VOLTAGE (V) 6.00 Figure 17. Quiescent Current versus Supply Voltage 5.00 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. 4.00 Vout (V) 5.0 V Figure 16. Output Voltage versus Supply Voltage Short Circuit Protection: 3.00 2.00 1.00 0.00 2.0 V 0 50 100 150 200 Iout (mA) 250 300 350 Figure 15. Foldback Characteristic of Vout http://onsemi.com 7 NCV4949A Reset Circuit 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 50ms. The typical reset output waveforms are shown in Figure 19. 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 = Vout C x 2.0 V T 2.0 mA Vout1 5.0 V VRT + 0.1 V VRT 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. 3.0 V t tR Reset tRD 1.23 V Vref 22 k 2.0 mA Switch On Reset + -- tRR Input Drop tRD Dump Output Overload Switch Off Figure 19. Typical Reset Output Waveforms CT Out 40 V Vin Sense Comparator 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. 2.0 V Reg Figure 18. Reset Circuit ORDERING INFORMATION Device NCV4949ADR2G* Operating Temperature Range Package Shipping† TJ = --40C to +125C SOIC--8 (Pb--Free) 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 = --40C, Thigh = +125C. Guaranteed by design. NCV prefix is for automotive and other applications requiring site and change control. http://onsemi.com 8 NCV4949A PACKAGE DIMENSIONS SOIC--8 NB CASE 751--07 ISSUE AJ --X-- NOTES: 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. A 8 5 S B 1 0.25 (0.010) M Y M 4 --Y-- K G C N DIM A B C D G H J K M N S X 45 _ SEATING PLANE --Z-- 0.10 (0.004) H D 0.25 (0.010) M Z Y S X M J 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 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. 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