NCV7681 100 mA Linear Current Regulator and Controller for Automotive LED Lighting The NCV7681 consists of eight linear programmable constant current sources. The part is designed for use in the regulation and control of LED based Rear Combination Lamps and blinking functions for automotive applications. System design with the NCV7681 allows for two programmed levels for stop (100% Duty Cycle) and tail illumination (programmable Duty Cycle), or an optional external PWM control can be implemented. LED brightness levels are easily programmed (stop is programmed to the absolute current value, tail is programmed to the duty cycle) with two external resistors. The use of an optional external ballast FET allows for power distribution on designs requiring high currents. Set back power limit reduces the drive current during overvoltage conditions. This is most useful for low power applications when no external FET is used. The device is available in a SOIC-16 WB package with exposed pad. Features * * * * * * * * * * * * * * * * Constant Current Outputs for LED String Drive LED Drive Current up to 100 mA per Channel Open LED String Diagnostic with Open-Drain Output in All Modes Slew Rate Control Eliminates EMI Concerns Low Dropout Operation for Pre-Regulator Applications External Modulation Capable On-chip 800 Hz Tail PWM Dimming Single Resistor for Stop Current Set Point Single Resistor for Tail Dimming Set Point Overvoltage Set Back Power Limitation AEC-Q100 Qualified and PPAP Capable 16 Lead SOICW Exposed Pad Improved EMC Performance Latch-Off Function on Open String (NCV7681L) Restart Option of Unaffected Strings Over Temperature Fault Reporting These are Pb-Free Devices www.onsemi.com MARKING DIAGRAM NCV7681x AWLYYWWG SOIC-16 WB PW SUFFIX CASE 751DW NCV7681 = Specific Device Code x = A (No Latch-Off Function) or L (Latch-Off Function) A = Assembly Location WL = Wafer Lot YY = Year WW = Work Week G = Pb-Free Device ORDERING INFORMATION Device Package Shipping NCV7681APWR2G SOIC-16WB (Pb-Free) 1000 / Tape & Reel NCV7681LPWR2G SOIC-16WB (Pb-Free) 1000 / 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. Applications * * * * * * Rear Combination Lamps (RCL) Daytime Running Lights (DRL) Fog Lights Center High Mounted Stop Lamps (CHMSL) Arrays Turn Signal and Other Externally Modulated Applications Signature Lamp (c) Semiconductor Components Industries, LLC, 2016 November, 2016 - Rev. 1 1 Publication Order Number: NCV7681/D NCV7681 DIAG Interface VP EMC Filter Open Load Detection Latch-Off Control CC UVLO Overvoltage 1 of 8 Vreg Ballast Drive Soft Start, Bias and Reference + - FB FET Drive 200K Out1 Output Current Drive Channel Control Over temperature & Over voltage sense DIAG Inverface Control Logic STOP 200K Out3 Out4 Setback Current -20% 1V Out2 Output Latch-Off Out5 Out6 50% IOUT Open Load Detect Out7 Out8 DIAG Oscillator and PWM 2.2V 0.4V V-I Converter CC Pin Current Limit Vreg Irstop + - IRSTOP x 150 Rtail + - 1.8V Open Circuit Restart RTAIL RSTOP Boxes with dotted lines signify NCV7681L only. Figure 1. Block Diagram OUT1 VP Ballast Drive FB STOP DIAG RSTOP RTAIL EP OUT2 OUT3 OUT4 GND OUT5 OUT6 OUT7 OUT8 Figure 2. Pinout Diagram www.onsemi.com 2 GND NCV7681 VSTRING MRA4003T3G TAIL NVD2955 STOP MRA4003T3G C1 0.68uF R1 10K C2 0.22uF C3 100nF R3 1K R4, 3.01K C4 10nF VP Ballast Drive FB STOP DIAG RSTOP RTAIL R5, 1.62K OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 OUT8 R6 9.53K GND R7 1K NCV7681 Figure 3. Application Diagram with External FET Ballast Transistor R6 and R7 values shown yield 10.5 V regulation on VSTRING. C1 is for line noise and stability considerations. C3 is for EMC considerations. Unused OUTx channels should be shorted to ground as OUT7 shows in this example. VSTRING MRA4003T3G TAIL STOP MRA4003T3G C3 100nF R1 10K C4 10nF C1 0.68uF VP Ballast Drive FB STOP DIAG R4, 3.01K RSTOP RTAIL R5, 1.62K OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 OUT8 GND NCV7681 Figure 4. Application Diagram without the FET Ballast Transistor When using the NCV7681 without the FET ballast transistor, tie the FB pin and Ballast Drive pin to GND. www.onsemi.com 3 NCV7681 Table 1. APPLICATION I/O TRUTH TABLE STOP INPUT TAIL MODE OUTx LATCH OFF (w/ LO = GND) OUTX CURRENT FAULT STATE* DIAG STATE** 0 0 NCV7681A OFF - 1 1 X NCV7681A ISTOP NORMAL 0 1 X NCV7681A ISTOP OPEN CIRCUIT*** 1 1 X NCV7681L OFF OPEN CIRCUIT*** 1 0 1 NCV7681A PWM NORMAL 0 0 1 NCV7681A PWM OPEN CIRCUIT*** PWM Reference Figures below. X = don't care 0 = LOW 1 = HIGH * Open Circuit, RSTOP Current Limit, Set Back Current Limit down 20%, and thermal shutdown **Pull-up resistor to DIAG required. *** OPEN CIRCUIT = Any string open. DIAG DIAG Open String Occurs Open String Removed Open String Occurs on OUTx Current OUTx Current off off on OUTx Current Open String Removed on on Outputs with no open string. OUTx Current off off Outputs with no open string. NCV7681L NCV7681A Figure 5. DIAG timing diagram WITH Open String Latch Active All outputs latch off. Figure 6. DIAG timing diagram WITHOUT Open String Latch Active No outputs are turned off. DIAG will report the state. www.onsemi.com 4 NCV7681 Table 2. PIN FUNCTION DESCRIPTION (16 Pin SO Wide Exposed Pad Package) Pin # Label 1 OUT1 Description Channel 1 constant current output to LED. Unused pin should be grounded. 2 VP 3 Ballast Drive Supply Voltage Input. 4 FB 5 STOP Stop Logic Input. External Modulation Input. 6 DIAG Open-drain diagnostic output. Reporting Open Circuit, RSTOP Current Limit, and Overvoltage Set Back Current down 20%. Normal Operation = LOW. Ground if not used. 7 RSTOP 8 RTAIL Tail current duty cycle PWM program resistor. Ground if using external modulation. 9 OUT8 Channel 8 constant current output to LED. Unused pin should be grounded. 10 OUT7 Channel 7 constant current output to LED. Unused pin should be grounded. 11 OUT6 Channel 6 constant current output to LED. Unused pin should be grounded. 12 OUT5 Channel 5 constant current output to LED. Unused pin should be grounded. 13 GND Ground. 14 OUT4 Channel 4 constant current output to LED. Unused pin should be grounded. 15 OUT3 Channel 3 constant current output to LED. Unused pin should be grounded. 16 OUT2 Channel 2 constant current output to LED. Unused pin should be grounded. epad* epad Ground. Do not connect to pcb traces other than GND. Gate drive for external power distribution PFET. Ground if not used. Feedback Sense node for VP regulation. Use feedback resistor divider or connect to VP with a 10k resistor. Stop current bias program resistor. *Grounding will provide better thermal and electrical performance. www.onsemi.com 5 NCV7681 Table 3. MAXIMUM RATINGS (Voltages are with respect to device substrate.) Value Rating Unit Supply Input (VP, Ballast Drive, STOP, DIAG) DC Peak Transient -0.3 to 40 40 V Output Pin Voltage (OUTX) -0.3 to 40 V Output Pin Current (OUTX) 200 mA DIAG Pin Current 10 mA Input Voltage (RTAIL, RSTOP, FB) -0.3 to 3.6 V Junction Temperature, TJ -40 to 150 C 260 peak C Peak Reflow Soldering Temperature: Lead-free 60 to 150 seconds at 217C (Note 1) 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. Table 4. ATTRIBUTES Characteristic Value ESD Capability Human Body Model Machine Model 4.0 kV 200 V Moisture Sensitivity (Note 1) MSL3 Storage Temperature -55 to 150C Package Thermal Resistance (Note 2) SOIC-16 WB EP Junction-to-Board (RYJB) Junction-to-Ambient (RqJA) Junction-to-Pin (RYJL) 15C/W 73C/W 43C/W 1. For additional information, see or download ON Semiconductor's Soldering and Mounting Techniques Reference Manual, SOLDERRM/D, and Application Note AND8003/D. 2. Values represent typical still air steady-state thermal performance on 1 oz. copper FR4 PCB with 650 mm2 copper area with OUT1-OUT8 dissipating 50 mW each. www.onsemi.com 6 NCV7681 Table 5. ELECTRICAL CHARACTERISTICS (4.5 V < VP < 16 V, STOP = VP, RSTOP = 3.01 kW, RTAIL = 1.62 kW, -40C TJ 150C, unless otherwise specified.) Characteristic Conditions Min Typ Max Unit VP = 16 V VP = 16 V VP = 16 V, STOP = 0 V, OUTx = 0 mA, Disconnected output - - - 6 5 - 12 12 2.0 Driver Ground Pin Current (pin12) IOUT1 to IOUT8 = 50 mA - 400 500 mA Output Under Voltage Lockout VP Rising 3.8 4.1 4.4 V Output Under Voltage Lockout Hysteresis - 200 - mV Open Load Disable Threshold 7.2 7.7 8.2 V Open Load Disable Hysteresis - 200 - mV GENERAL PARAMETERS Quiescent Current (IOUTx = 50 mA) STOP mode Tail mode Fault mode (Note 5) mA THERMAL LIMIT Thermal Shutdown (Note 3) 150 175 - C Thermal Hysteresis (Note 3) - 15 - C Output Current OUTX = 0.5 V, TJ = 25C, 150C OUTX = 1 V, RSTOP = 1.5 K 45 90 50 100 55 110 mA Maximum Regulated Output Current 0.5V to 16V 100 - - mA -4 0 4 % CURRENT SOURCE OUTPUTS Current Matching 2IOUTx(min) IOUTx(min) * 1 ) IOUTx(max) 2IOUTx(max) IOUTx(min) * 1 ) IOUTx(max) 100 100 Line Regulation 9 V VP 16 V - 1.2 6.0 mA Open Circuit Detection Threshold 25 mA 50 mA 25 35 50 50 75 65 % of Output Current Current Slew Rate Iout = 44 mA, 10% to 90% points - 6 15 mA/ms Overvoltage Set Back Threshold @ 99% Iout 16.0 17.2 18.4 V Overvoltage Set Back Current VP = 20 V (Note 4) - 78 - %Iout - 80 - %Iout EN = high - - 1 mA FB = 1.5 V, Ballast Drive = 3 V FB = 0.5 V, Ballast Drive = 3 V - 4 1.0 13 2.4 20 0.92 1.00 1.08 V Input High Threshold 0.75 1.25 1.75 V Input Low Threshold 0.70 1.00 1.44 V VIN Hysteresis 100 250 400 mV 120 200 300 kW Diag Reporting of Set Back Current Output Off Leakage FET DRIVER Ballast Drive DC Bias Sink Current mA Ballast Drive Reference Voltage STOP LOGIC Input Impedance Vin = 14 V 3. Designed to meet these characteristics over the stated voltage and temperature recommended operating ranges, though may not be 100% parametrically tested in production. 4. The output current degrades at a rate of 8%/V. 5. This test parameter applies only to the NCV7681LPWR2G. www.onsemi.com 7 NCV7681 Table 5. ELECTRICAL CHARACTERISTICS (4.5 V < VP < 16 V, STOP = VP, RSTOP = 3.01 kW, RTAIL = 1.62 kW, -40C TJ 150C, unless otherwise specified.) Characteristic Conditions Min Typ Max Unit 0.94 1.00 1.06 V - 150 - - CURRENT PROGRAMMING RSTOP Bias Voltage Stop current programming voltage RSTOP K multiplier IOUTX/IRSTOP RSTOP Over Current Detection RSTOP = 0 V 0.70 1.00 1.45 mA RTAIL Bias Current Tail duty cycle programming current 290 330 370 mA Duty Cycle RTAIL = 0.49 V RTAIL = 0.76 V RTAIL = 1.66 V 3.5 17 59.5 5 20 70 6.5 23 80.5 % DIAG OUTPUT Output Low Voltage DIAG Active, IDIAG = 1 mA - 0.1 0.40 V DIAG Output Leakage VDIAG = 5 V - - 10 mA Open Load Reset Voltage on DIAG (Note 5) 1.6 1.8 2.0 V - 14 45 msec AC CHARACTERISTICS Stop Turn-on Delay Time V(STOP) > 1.75 V to I(OUTx) = 90% Stop Turn-off Delay Time V(STOP) < 0.75 V to I(OUTx) = 10% PWM Frequency STOP = 0 V Open Circuit to DIAG Reporting 4.8 mA pull-up to VP, V(DIAG) >1.5 V VP Turn-on Time - 14 45 msec 400 800 1200 Hz 1 2 4 ms 0.55 0.80 1.2 msec 3. Designed to meet these characteristics over the stated voltage and temperature recommended operating ranges, though may not be 100% parametrically tested in production. 4. The output current degrades at a rate of 8%/V. 5. This test parameter applies only to the NCV7681LPWR2G. www.onsemi.com 8 NCV7681 TYPICAL CHARACTERISTICS 53 80 70 60 50 40 30 20 10 0 T = 25C 0 1 2 3 4 5 6 7 8 9 52 51 50 49 48 RSTOP = 3.01 kW 47 -40 -20 0 20 40 10 60 80 100 120 140 160 RSTOP (kW) TEMPERATURE (C) Figure 7. Iout vs. RSTOP Figure 8. Iout vs. Temperature 100 100 90 90 80 80 DUTY CYCLE (%) DUTY CYCLE (%) Iout, OUTPUT CURRENT (mA) 90 70 60 50 40 30 20 70 60 50 40 30 20 10 0 10 0 RSTOP = 3.01 kW 0 1 2 3 4 5 6 7 0 0.5 1.0 1.5 2.0 RTAIL (kW) V(RTAIL) Figure 9. Duty Cycle vs. RTAIL Figure 10. Duty Cycle vs. V(RTAIL) 80 RTAIL = 5 kW 70 DUTY CYCLE (%) Iout OUTPUT CURRENT (mA) 100 60 50 40 30 RTAIL = 2.3 kW 20 10 RTAIL = 1.5 kW 0 -40 -20 0 20 40 60 80 100 120 140 160 TEMPERATURE (C) Figure 11. Duty Cycle vs. Temperature www.onsemi.com 9 2.5 NCV7681 TYPICAL CHARACTERISTICS 51.0 IOUT, OUTPUT CURRENT (mA) IOUT, OUTPUT CURRENT (mA) 60 50 40 30 20 10 RSTOP = 3.01 k 0 9 11 13 15 19 17 21 23 25 50.8 50.6 50.4 50.2 50.0 49.8 49.6 49.4 49.2 49.0 27 6 9 8 10 11 12 13 14 VP (V) VOUT (V) Figure 12. IOUT vs. VP Figure 13. IOUT Line Regulation 15 16 60 IOUT, OUTPUT CURRENT (mA) 60 50 40 30 20 10 0 50 40 30 20 10 0 0 2 4 6 8 10 12 14 16 0 0.1 0.2 0.3 VOUT (V) VOUT (V) Figure 14. IOUT vs. VOUT Figure 15. IOUT vs. VOUT 14 12 10 VSTRING (V) IOUT, OUTPUT CURRENT (mA) 7 8 6 4 per eq. 1 R7 = 1 kW 2 0 0 2K 4K 6K 8K 10K R6 (W) Figure 16. VSTRING vs. R6 www.onsemi.com 10 12K 14K 0.4 0.5 NCV7681 TYPICAL PERFORMANCE CHARACTERISTICS 160 140 qJA (C/W) 120 100 1 oz 80 2 oz 60 40 20 0 0 100 200 300 400 500 COPPER HEAT SPREADER AREA 600 700 (mm2) Figure 17. qJA vs. Copper Spreader Area 100 D = 0.5 R(t) (C/W) 0.2 0.1 10 0.05 0.02 0.01 SINGLE PULSE 1 0.000001 0.00001 0.0001 0.001 0.01 0.1 1 10 100 1000 PULSE TIME (s) Figure 18. Thermal Duty Cycle Curves on 500 mm2 Spreader Test Board 1000 100 mm2 50 mm2 100 R(t) (C/W) 500 mm2 10 1 0.000001 0.00001 0.0001 0.001 0.01 0.1 1 PULSE TIME (s) Figure 19. Single Pulse Heating Curve www.onsemi.com 11 10 100 1000 NCV7681 DETAILED OPERATING DESCRIPTION General module will either display all LED strings or no LED strings at all. This function is designed into the NCV7681L. Each output has its own sensing circuitry. An open string detection on any output latches off all 8 outputs. There are three means to reinitiate the IC drivers. 1. Forcing the DIAG pin below the Open Circuit Reset Voltage (1.8 V typical). 2. Toggling the ENABLE input 3. A complete power down of the device below the Under Voltage Lockout threshold including hysteresis (3.9 V typical). The NCV7681 device is an eight channel LED driver whose output currents up to 100 mA/channel are programmed by an external resistor. The target application for the device is in automotive Rear Combination Lighting (RCL) systems. The STOP logic input switches the two modes of the IC. While in the STOP mode (high), the duty cycle of the outputs is at 100%. When STOP is low, the duty cycle of the outputs is programmed via an external resistor on the RTAIL pin. A logic output (DIAG) communicates open circuit of the LED driver outputs back to the microprocessor. DIAG requires a pull-up resistor for proper operation. An optional external control for a ballast transistor helps distribute the system power. Open Load Detection Open load detection has an under voltage lockout feature to remove the possibility of turning off the device while it is powering up. The Open Load Disable Threshold is 7.7 V (typ). Open load detection becomes active above this threshold. Current is monitored internal to the NCV7681 device and an open load is flagged when the current is 1/2 of the targeted output current. Latch Off (NCV7681L) The Latch Off feature applies only to the NCV7681L. Automotive requirements sometime dictate all outputs turn off if one of the outputs is an open circuit. This eliminates driving with partial illuminated lights. The TAIL D1 MRA4003T3G Q1 STOP D2 MRA4003T3G C1 0.68uF Q2 NVD2955 NVD2955 R1 C2 1K 0.22uF R2 C4 1K 0.22uF C3 0.68uF VSTRING C5 100nF D3 D6 D9 D12 D4 D7 D10 D13 D5 D8 D11 D14 1 -8 C6 100nF OUT1-OUT8 OUT1-OUT8 OUT1 VP Ballast Drive --------- --------- OUT1 VP Ballast Drive OUT8 OUT8 R3 9.53K FB FB R4 1K NCV7681 U1 GND GND NCV7681 U2 Figure 20. www.onsemi.com 12 NCV7681 DIAG brightness level for tail. The PWM generator's fixed frequency (800 Hz typ.) oscillator allows flicker-free illumination. PWM control is the preferred method for dimming LEDs. The diagnostic function allows the detection of an open in any one of the output circuits. The active-low diagnostic output (DIAG) is coincident with the STOP input and the ON state in the tail mode. DIAG remains high (pulled up) if an open load is detected in any LED string when STOP is high. The logic DIAG pin's main function is to alert the controlling microprocessor an open string has occurred on one of the outputs (DIAG high = open string). Reference Table 1 for details on logic performance. Open circuit conditions are reported when the outputs are actively driven. When operating in STOP mode the DIAG signal is a DC signal. When operating in TAIL the DIAG signal is a PWM signal reporting open circuit when the output drive is active. Output Current Programming Ballast Drive Reference Figure 7 (typ performance graph) to choose programming resistor (RSTOP) value for stop current. Reference Figure 9 Typical Performance Graph (Duty Cycle vs. RTAIL) to choose a typical value programming resistor for output duty cycle (with a typical RSTOP value of 3.01 kW). Note the duty cycle is dependent on both RSTOP and RTAIL values. RSTOP should always be chosen first as the stop current is only dependent on this value. Alternatively, the equations below can be used to calculate a typical value and used for worst case analysis. Set the Stop Current using RSTOP The use of an external FET device (NVD2955) helps distribute the system power. A DC voltage regulation system is used which regulates the voltage at the top (anode) of the LED strings (Vstring). This has the effect of limiting the power in the NCV7681 by setting the voltage on the IOUTx pins specific to each customer application. The Ballast Drive pin provides the drive in the feedback loop from the FB pin. In steady state, the voltage is regulated at the feedback voltage (FB). A simple voltage divider helps set the voltage at Vstring. Unlike other systems, the ballast drive current does not turn off in a leakage state when turned off (FB high), but instead provides 1 mA of current providing a faster response of the system loop. This sets the gate voltage of the NVD2955 to 1 V at 25C. RSTOP Bias Voltage = 1 V (typ) Parallel Outputs Set the Duty Cycle (DC) using RTAIL I OUTX + 150 @ RSTOP_Bias_Voltage RSTOP RTAIL + 1.8 @ RSTOP(DC ) 0.22) The maximum rating per output is 100 mA. In order to increase system level LED string current, parallel combinations of any number of outputs is allowed. Combining all 8 outputs will allow for a maximum system level string current design of 800 mA. (eq. 1) (eq. 2) DC = duty cycle expressed in fractional form. (e.g. 0.50 is equivalent to 50% duty cycle) (ground RTAIL when using external modulation) Output Current is directly tested per the electrical parameter table to be 10% (with RSTOP = 3.01 KW) or 45 mA (min), 50 mA (typ), 55 mA (max) at room and hot temperature. Duty Cycle will vary according to the changes in RTAIL Voltage and RTAIL Bias Current (generated from the current through RSTOP). Voltage errors encompass generator errors (0.4 V to 2.2 V) and comparator errors and are included in testing as the Duty Cycle. Typical duty cycle measurements are 5% with RTAIL = 0.49 V and 70% with RTAIL = 1.66 V. RTAIL Bias Current errors are measured as RTAIL Bias Current and vary as 290 mA (min), 330 mA (typ), and 370 mA (max) with RSTOP = 3.01 kW. The error duality originating from both the internal current source generated on the RSTOP pin and the comparator voltage thresholds of the RTAIL pin combined with the choice of duty cycle levels make it difficult to specify duty cycle minimum and maximum limits, but worst case conditions can be calculated when considering the variation in the voltage threshold and current source. Duty Cycle variation must include the direct duty cycle as specified in the electrical parameter table plus an additional error due to the Irstop current which generates this voltage in the system. Unused Outputs Unused outputs should be shorted to ground. The NCV7681 detects the condition during power-up using the open load disable threshold and disables the open circuit detection circuitry. Programmability Strings of LEDs are a common configuration for RCL applications. The NCV7681 provides eight matched outputs allowing individual string drive with current set by a single resistor. Output currents are mirrored and matched within 4% at hot temperature. A high STOP condition sets the output current using equation 1 below. A low STOP condition, modulates the output currents at a duty cycle (DC) programmed using equation 2 below. Note, current limiting on RSTOP limits the current which can be referenced from the RSTOP Pin. Exceeding the RSTOP Current Limit will set the output current to less than 100 mA, and the DIAG Pin will go high. This helps limit output current (brightness and power) for this type of fault. The average ISTOP Duty Cycle current provides the dimmed tail illumination function and assures a fixed www.onsemi.com 13 NCV7681 RSTOP Over Current Protection consistent LED light output at low line voltage. Unlike adjustable regulator based constant current source schemes where the set point resistor resides in the load path, the NCV7681's set point resistor lies outside the LED load path, and aids in the low dropout capability. Setback Current Limit is employed during high voltage. During a Setback Current Limit event, the drive current is reduced resulting in lower power dissipation on the IC. This occurs during high battery voltage (VP > 16 V). In this way the NCV7681 can operate in extreme conditions and still provide a controlled level of light output The Setback Current (-20%) condition is reported on the DIAG Pin. Activation of the set back current feature provides a roll-off rate of -8%/V. Over Current protection has been included for the RSTOP pin. Without protection, the device performance could cause excessive high current and potential damage to the external LEDs. Detection of the RSTOP over current event (RSTOP to ground) is 1 mA (typ) and is current limited to 2.2 mA (typ). Output drive currents will limit to typically 65 mA. Note - A feature of the NCV7681 device includes operation of the device during a short circuit on the RSTOP pin. Iout is decreased during the STOP condition and the TAIL duty cycle is reduced to less than 40% by reducing the voltage on the RTAIL pin to 2/3 of normal operation. Set Back Current Automotive battery systems have wide variations in line supply voltage. Low dropout is a key attribute for providing www.onsemi.com 14 NCV7681 PACKAGE DIMENSIONS SOIC-16 WB, EP CASE 751DW ISSUE A D 0.25 M B M A B 9 16 H PIN 1 INDICATOR NOTES: 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994. 2. CONTROLLING DIMENSION: MILLIMETERS. 3. DIMENSION b DOES NOT INCLUDE DAMBAR PROTRUSION. DAMBAR PROTRUSION SHALL BE 0.13 TOTAL IN EXCESS OF b DIMENSION AT MAXIMUM MATERIAL CONDITION. 4. DIMENSIONS D AND E DO NOT INCLUDE MOLD PROTRUSIONS. 5. MAXIMUM MOLD PROTRUSION OR FLASH TO BE 0.15 PER SIDE. M E 1 8 16X e b 0.25 h x 45 M T A S B S DIM A A1 b c D D1 E E1 e H h L M DETAIL A END VIEW TOP VIEW 16X L T SEATING PLANE A1 A SIDE VIEW c MILLIMETERS MIN MAX 2.65 2.35 0.00 0.10 0.35 0.49 0.25 0.32 10.15 10.45 1.79 2.00 7.40 7.60 2.27 2.47 1.27 BSC 10.05 10.55 0.53 REF 0.50 0.90 0_ 7_ DETAIL A D1 RECOMMENDED SOLDERING FOOTPRINT 16X 0.58 2.50 E1 11.00 2.87 BOTTOM VIEW 1 16X 1.62 1.27 PITCH DIMENSIONS: MILLIMETERS 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. 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