NCV4266 150 mA Low-Dropout Voltage Regulator with Enable The NCV4266 is a 150 mA output current integrated low dropout regulator family designed for use in harsh automotive environments. It includes wide operating temperature and input voltage ranges. The device is offered with fixed voltage versions of 3.3 V and 5.0 V available in 2% output voltage accuracy. It has a high peak input voltage tolerance and reverse input voltage protection. It also provides overcurrent protection, overtemperature protection and enable function for control of the state of the output voltage. The NCV4266 is available in SOT−223 surface mount package. The output is stable over a wide output capacitance and ESR range. The NCV4266 has improved startup behavior during input voltage transients. Features • • • • • • • • 3.3 V and 5.0 V Output Voltage 150 mA Output Current 500 mV (max) Dropout Voltage Enable Input Very Low Current Consumption Fault Protection ♦ +45 V Peak Transient Voltage ♦ −42 V Reverse Voltage ♦ Short Circuit ♦ Thermal Overload NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and PPAP Capable These are Pb−Free Devices I http://onsemi.com MARKING DIAGRAM SOT−223 (TO−261) ST SUFFIX CASE 318E A Y W x G AYW 4266xG G 1 = Assembly Location = Year = Work Week = Voltage Option 3.3 V (x = 3) 5.0 V (x = 5) = Pb−Free Package (*Note: Microdot may be in either location) ORDERING INFORMATION See detailed ordering and shipping information in the ordering information section on page 10 of this data sheet. Q Bandgap Reference Error Amplifier Current Limit and Saturation Sense − + Thermal Shutdown EN GND Figure 1. Block Diagram © Semiconductor Components Industries, LLC, 2012 June, 2012 − Rev. 2 1 Publication Order Number: NCV4266/D NCV4266 PIN FUNCTION DESCRIPTION Pin No. Symbol 1 I 2 EN 3 Q 4 GND Description Input; Battery Supply Input Voltage. Enable Input; low level disables the IC. Output; Bypass with a capacitor to GND. Ground. MAXIMUM RATINGS* Rating Symbol Min Max Unit Input Voltage VI −42 45 V Input Peak Transient Voltage VI − 45 V Enable Input Voltage VEN −42 45 V Output Voltage VQ −1.0 40 V Ground Current Iq − 100 mA Input Voltage Operating Range VI VQ + 0.5 V or 4.5 (Note 1) 40 V − − 4.0 250 − − kV V Junction Temperature TJ −40 150 °C Storage Temperature Tstg −50 150 °C ESD Susceptibility (Human Body Model) (Machine Model) 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. *During the voltage range which exceeds the maximum tested voltage of I, operation is assured, but not specified. Wider limits may apply. Thermal dissipation must be observed closely. 1. Minimum VI = 4.5 V or (VQ + 0.5 V), whichever is higher. LEAD TEMPERATURE SOLDERING REFLOW AND MSL (Note 2) Rating Symbol Lead Temperature Soldering Reflow (SMD styles only), Leaded, 60−150 s above 183, 30 s max at peak Reflow (SMD styles only), Free, 60−150 s above 217, 40 s max at peak Wave Solder (through hole styles only), 12 sec max TSLD Moisture Sensitivity Level MSL Min Max − − − 240 265 310 3 Unit °C − 2. Per IPC / JEDEC J−STD−020C. THERMAL CHARACTERISTICS Characteristic Test Conditions (Typical Value) Unit Min Pad Board (Note 3) 1, Pad Board (Note 4) Junction−to−Tab (psi−JL4, yJL4) 15.7 18 C/W Junction−to−Ambient (RqJA, qJA) 96 77 C/W 3. 1 oz. copper, 0.26 inch2 (168 mm2) copper area, 0.062″ thick FR4. 4. 1 oz. copper, 1.14 inch2 (736 mm2) copper area, 0.062″ thick FR4. http://onsemi.com 2 NCV4266 ELECTRICAL CHARACTERISTICS (VI = 13.5 V; −40°C < TJ < 150°C; unless otherwise noted.) Characteristic Symbol Test Conditions Min Typ Max Unit 4.9 5.0 5.1 V 3.234 3.3 3.366 V 150 200 500 mA OUTPUT Output Voltage (5.0 V Version) VQ 5.0 mA < IQ < 150 mA, 6 V < VI < 28 V Output Voltage (3.3 V Version) VQ 5.0 mA < IQ < 150 mA, 4.5 V < VI < 28 V Output Current Limitation IQ VQ = 90% VQTYP Quiescent Current (Sleep Mode) Iq = II − IQ Iq VEN = 0 V − − 10 mA Quiescent Current, Iq = II − IQ Iq IQ = 1.0 mA − 130 200 mA Quiescent Current, Iq = II − IQ Iq IQ = 150 mA − 10 15 mA IQ = 150 mA, VDR = VI − VQ (Note 5) − 250 500 mV IQ = 5.0 mA to 150 mA − 3.0 20 mV Dropout Voltage (5.0 V Version) Load Regulation VDR DVQ,LO Line Regulation (5.0 V Version) DVQ DVI = 6.0 V to 28 V, IQ = 5.0 mA − 10 25 mV Line Regulation (3.3 V Version) DVQ DVI = 4.5 V to 28 V, IQ = 5.0 mA − 10 25 mV Power Supply Ripple Rejection PSRR fr = 100 Hz, Vr = 0.5 VPP − 70 − dB Temperature Output Voltage Drift dVQ/dT − 0.5 − mV/K − ENABLE INPUT Enable Voltage, Output High VEN VQ w VQMIN − 2.3 2.8 V Enable Voltage, Output Low (Off) VEN VQ v 0.1 V 1.8 2.2 − V Enable Input Current IEN VEN = 5.0 V 5.0 10 20 mA 150 − 210 °C THERMAL SHUTDOWN Thermal Shutdown Temperature* TSD *Guaranteed by design, not tested in production. 5. Measured when the output voltage VQ has dropped 100 mV from the nominal value obtained at V = 13.5 V. Input II CI1 1.0 mF I 1 CI2 100 nF NCV4266 EN IEN 2 IQ 3 Q CQ 22 mF RL 4 GND Figure 2. Applications Circuit http://onsemi.com 3 Output NCV4266 TYPICAL PERFORMANCE CHARACTERISTICS 100 Unstable Region CQ = 10 mF − 100 mF ESR (W) 10 1 Stable Region 0.1 0.01 0 25 50 75 100 125 150 OUTPUT CURRENT (mA) Figure 3. Output Stability with Output Capacitor ESR 3.5 VI = 13.5 V RL = 1 kW VQ, OUTPUT VOLTAGE (V) VQ, OUTPUT VOLTAGE (V) 5.2 5.1 5.0 4.9 4.8 −40 0 40 80 120 VI = 13.5 V RL = 660 W 3.4 3.3 3.2 3.1 −40 160 0 TJ, JUNCTION TEMPERATURE (°C) Figure 4. Output Voltage vs. Junction Temperature, 5.0 V Version 15 10 5 0 0 5 10 15 20 25 30 VI, INPUT VOLTAGE (V) 120 6 TJ = 25°C RL = 33 W 20 80 160 Figure 5. Output Voltage vs. Junction Temperature, 3.3 V Version Iq, QUIESCENT CURRENT (mA) Iq, QUIESCENT CURRENT (mA) 25 40 TJ, JUNCTION TEMPERATURE (°C) 35 5 4 3 2 1 0 40 Figure 6. Quiescent Current vs. Input Voltage, 5.0 V Version TJ = 25°C RL = 22 W 0 5 10 15 20 25 30 VI, INPUT VOLTAGE (V) 35 Figure 7. Quiescent Current vs. Input Voltage, 3.3 V Version http://onsemi.com 4 40 NCV4266 TYPICAL PERFORMANCE CHARACTERISTICS 6 TJ = 25°C RL = 33 W 5 VQ, OUTPUT VOLTAGE (V) VQ, OUTPUT VOLTAGE (V) 6 4 3 2 1 0 0 2 4 6 VI, INPUT VOLTAGE (V) 8 4 3 2 1 0 10 TJ = 25°C RL = 22 W 5 0 2 6.0 1 4.0 0 2.0 0 −2.0 −4.0 −6.0 TJ = 25°C RL = 6.8 kW −8.0 −10 −50 −25 0 25 10 −1 −2 −3 −4 −5 TJ = 25°C RL = 6.8 kW −6 −7 −50 50 −25 VI, INPUT VOLTAGE (V) 0 25 50 VI, INPUT VOLTAGE (V) Figure 11. Input Current vs. Input Voltage, 3.3 V Version Figure 10. Input Current vs. Input Voltage, 5.0 V Version 400 IQ, OUTPUT CURRENT (mA) 300 VDR, DROPOUT VOLTAGE (mV) 8 Figure 9. Output Voltage vs. Input Voltage, 3.3 V Version II, INPUT CURRENT (mA) II, INPUT CURRENT (mA) Figure 8. Output Voltage vs. Input Voltage, 5.0 V Version 4 6 VI, INPUT VOLTAGE (V) 250 TJ = 125°C 200 150 TJ = 25°C 100 50 TJ = 25°C VQ = 0 V 350 300 250 200 150 100 50 0 0 25 50 75 100 IQ, OUTPUT CURRENT (mA) 125 150 0 0 Figure 12. Dropout Voltage vs. Output Current (5.0 V Version only) 5 10 15 20 25 30 VI, INPUT VOLTAGE (V) 35 Figure 13. Maximum Output Current vs. Input Voltage http://onsemi.com 5 40 NCV4266 TYPICAL PERFORMANCE CHARACTERISTICS 6 TJ = 25°C VI = 13.5 V 0.8 Iq, QUIESCENT CURRENT (mA) Iq, QUIESCENT CURRENT (mA) 1 0.6 0.4 0.2 0 0 5 10 15 20 25 4 3 2 1 0 25 50 75 100 125 IQ, OUTPUT CURRENT (mA) IQ, OUTPUT CURRENT (mA) Figure 14. Quiescent Current vs. Output Current (Low Load), 5.0 V Version Figure 15. Quiescent Current vs. Output Current (High Load), 5.0 V Version 6 1 TJ = 25°C VI = 13.5 V 0.8 Iq, QUIESCENT CURRENT (mA) Iq, QUIESCENT CURRENT (mA) 5 0 30 TJ = 25°C VI = 13.5 V 0.6 0.4 0.2 0 0 5 10 15 20 25 TJ = 25°C VI = 13.5 V 5 4 3 2 1 0 30 0 IQ, OUTPUT CURRENT (mA) 25 50 75 100 125 IQ, OUTPUT CURRENT (mA) Figure 17. Quiescent Current vs. Output Current (High Load), 3.3 V Version Figure 16. Quiescent Current vs. Output Current (Low Load), 3.3 V Version http://onsemi.com 6 150 150 NCV4266 Circuit Description The NCV4266 is an integrated low dropout regulator that provides a regulated voltage at 150 mA to the output. It is enabled with an input to the enable pin. The regulator voltage is provided by a PNP pass transistor controlled by an error amplifier with a bandgap reference, which gives it the lowest possible dropout voltage. The output current capability is 150 mA, and the base drive quiescent current is controlled to prevent oversaturation when the input voltage is low or when the output is overloaded. The regulator is protected by both current limit and thermal shutdown. Thermal shutdown occurs above 150°C to protect the IC during overloads and extreme ambient temperatures. transient response and loop stability. The capacitor value and type should be based on cost, availability, size and temperature constraints. The aluminum electrolytic capacitor is the least expensive solution, but, if the circuit operates at low temperatures (−25°C to −40°C), both the value and ESR of the capacitor will vary considerably. The capacitor manufacturer’s data sheet usually provides this information. The value for the output capacitor CQ, shown in Figure 2, should work for most applications; see also Figure 3 for output stability at various load and Output Capacitor ESR conditions. Stable region of ESR in Figure 3 shows ESR values at which the LDO output voltage does not have any permanent oscillations at any dynamic changes of output load current. Marginal ESR is the value at which the output voltage waving is fully damped during four periods after the load change and no oscillation is further observable. ESR characteristics were measured with ceramic capacitors and additional series resistors to emulate ESR. Low duty cycle pulse load current technique has been used to maintain junction temperature close to ambient temperature. Regulator The error amplifier compares the reference voltage to a sample of the output voltage (VQ) and drives the base of a PNP series pass transistor via a buffer. The reference is a bandgap design to give it a temperature−stable output. Saturation control of the PNP is a function of the load current and input voltage. Oversaturation of the output power device is prevented, and quiescent current in the ground pin is minimized. See Figure 2, Test Circuit, for circuit element nomenclature illustration. Enable Input The enable pin is used to turn the regulator on or off. By holding the pin down to a voltage less than 1.8 V, the output of the regulator will be turned off. When the voltage on the enable pin is greater than 2.8 V, the output of the regulator will be enabled to power its output to the regulated output voltage. The enable pin may be connected directly to the input pin to give constant enable to the output regulator. Regulator Stability Considerations The input capacitors (CI1 and CI2) are necessary to stabilize the input impedance to avoid voltage line influences. Using a resistor of approximately 1.0 W in series with CI2 can stop potential oscillations caused by stray inductance and capacitance. The output capacitor helps determine three main characteristics of a linear regulator: startup delay, load http://onsemi.com 7 NCV4266 Calculating Power Dissipation in a Single Output Linear Regulator The maximum power dissipation for a single output regulator (Figure 18) is: PD(max) + [VI(max) * VQ(min)] IQ(max) Heatsinks A heatsink effectively increases the surface area of the package to improve the flow of heat away from the IC and into the surrounding air. Each material in the heat flow path between the IC and the outside environment will have a thermal resistance. Like series electrical resistances, these resistances are summed to determine the value of RqJA: (1) ) VI(max)Iq where RqJA + RqJC ) RqCS ) RqSA VI(max) VQ(min) IQ(max) is the maximum input voltage, is the minimum output voltage, is the maximum output current for the application, Iq is the quiescent current the regulator consumes at IQ(max). Once the value of PD(max) is known, the maximum permissible value of RqJA can be calculated: o T RqJA + 150 C * A PD where RqJC is the junction−to−case thermal resistance, RqCS is the case−to−heatsink thermal resistance, RqSA is the heatsink−to−ambient thermal resistance. RqJC appears in the package section of the data sheet. Like RqJA, it too is a function of package type. RqCS and RqSA are functions of the package type, heatsink and the interface between them. These values appear in data sheets of heatsink manufacturers. Thermal, mounting, and heatsinking considerations are discussed in the ON Semiconductor application note AN1040/D. (2) The value of RqJA can then be compared with those in the package section of the data sheet. Those packages with RqJA less than the calculated value in Equation 2 will keep the die temperature below 150°C. In some cases, none of the packages will be sufficient to dissipate the heat generated by the IC, and an external heatsink will be required. IQ II VI SMART REGULATOR® (3) VQ } Control Features Iq Figure 18. Single Output Regulator with Key Performance Parameters Labeled http://onsemi.com 8 RqJA, THERMAL RESISTANCE (C°/W) NCV4266 140 130 120 110 100 90 1 oz 80 70 60 2 oz 0 100 200 300 400 500 COPPER HEAT SPREADER AREA 600 700 (mm2) Figure 19. RqJA vs. Copper Spreader Area 100 Cu Area 167 mm2 Cu Area 736 mm2 R(t) C°/W 10 1 0.1 0.000001 0.00001 0.0001 0.001 0.01 0.1 TIME (sec) 1 10 100 1000 10 100 1000 Figure 20. Single−Pulse Heating Curves 100 RqJA 736 mm2 C°/W 50% Duty Cycle 20% 10 10% 5% 2% 1 1% Non−normalized Response 0.1 0.000001 0.00001 0.0001 0.001 0.01 0.1 1 PULSE WIDTH (sec) Figure 21. Duty Cycle for 1, Spreader Boards http://onsemi.com 9 NCV4266 ORDERING INFORMATION Output Voltage Package Shipping† NCV4266ST33T3G 3.3 V SOT−223 (Pb−Free) 4000 / Tape & Reel NCV4266ST50T3G 5.0 V SOT−223 (Pb−Free) 4000 / Tape & Reel Device †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. http://onsemi.com 10 NCV4266 PACKAGE DIMENSIONS SOT−223 (TO−261) CASE 318E−04 ISSUE N D b1 NOTES: 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994. 2. CONTROLLING DIMENSION: INCH. MILLIMETERS INCHES DIM MIN NOM MAX MIN NOM 0.064 A 1.50 1.63 1.75 0.060 A1 0.02 0.06 0.10 0.001 0.002 0.030 b 0.60 0.75 0.89 0.024 b1 2.90 3.06 3.20 0.115 0.121 0.012 c 0.24 0.29 0.35 0.009 0.256 D 6.30 6.50 6.70 0.249 E 3.30 3.50 3.70 0.130 0.138 0.091 e 2.20 2.30 2.40 0.087 e1 0.85 0.94 1.05 0.033 0.037 L 0.20 −−− −−− 0.008 −−− L1 1.50 1.75 2.00 0.060 0.069 HE 6.70 7.00 7.30 0.264 0.276 0° 10° 0° − − q 4 HE E 1 2 3 b e1 e 0.08 (0003) A1 C q A L MAX 0.068 0.004 0.035 0.126 0.014 0.263 0.145 0.094 0.041 −−− 0.078 0.287 10° L1 SOLDERING FOOTPRINT 3.8 0.15 2.0 0.079 2.3 0.091 2.3 0.091 6.3 0.248 2.0 0.079 1.5 0.059 SCALE 6:1 mm Ǔ ǒinches ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf . 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