NCP3334 High Accuracy, Ultra Low Iq, 500 mA Adjustable Low Dropout Regulator The NCP3334 is a high performance, low dropout regulator. With accuracy of ±0.9% over line and load and ultra−low quiescent current and noise it encompasses all of the necessary features required by today’s consumer electronics. This unique device is guaranteed to be stable without a minimum load current requirement and stable with any type of capacitor as small as 1.0 mF. The NCP3334 offers reverse bias protection. http://onsemi.com MARKING DIAGRAM 8 3334 ALYW G SOIC−8 CASE 751 8 1 1 Features • • • • • • • • • • • • High Accuracy Over Line and Load (±0.9% at 25°C) Ultra−Low Dropout Voltage Low Noise Low Shutdown Current (0.07 mA) Reverse Bias Protected 2.6 V to 12 V Supply Range Thermal Shutdown Protection Current Limitation Requires Only 1.0 mF Output Capacitance for Stability Stable with Any Type of Capacitor (including MLCC) No Minimum Output Current Required for Stability This is a Pb−Free Device A L Y W G PIN CONNECTIONS 1 GND SD IN IN April, 2006 − Rev. 2 NC FB OUT OUT See detailed ordering and shipping information in the package dimensions section on page 6 of this data sheet. PCMCIA Card Cellular Phones Camcoders and Cameras Networking Systems, DSL/Cable Modems Cable Set−Top Box MP3/CD Players DSP Supply Displays and Monitors © Semiconductor Components Industries, LLC, 2006 8 ORDERING INFORMATION Applications • • • • • • • • = Assembly Location = Wafer Lot = Year = Work Week = Pb−Free Package 1 Publication Order Number: NCP3334/D NCP3334 OUT 3 OUT IN 4 Vin FB IN 6 5 7 CADJ 68 pF R1 + Cin 1.0 mF Cout 1.0 mF R2 GND SD 2 Vout + 1 ON OFF Figure 1. Typical Adjustable Version Application Schematic PIN FUNCTION DESCRIPTION Pin No. Pin Name Description 1 GND 2 SD Shutdown pin. When not in use, this pin should be connected to the input pin. 3, 4 IN Power Supply Input Voltage 5, 6 OUT 7 FB Feedback pin; reference voltage = 1.25 V. 8 NC Not Connected Power Supply Ground Regulated output voltage. Bypass to ground with Cout w 1.0 mF. MAXIMUM RATINGS Rating Symbol Value Unit Input Voltage Vin −0.3 to +16 V Output Voltage Vout −0.3 to Vin +0.3 or 10 V* V Shutdown Pin Voltage Vsh −0.3 to +16 V Thermal Characteristics Thermal Resistance, Junction−to−Air RqJA 238 °C/W Operating Junction Temperature Range TJ −40 to +150 °C Storage Temperature Range Tstg −50 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. NOTE: This device series contains ESD protection and exceeds the following tests: Human Body Model (HBM) JESD 22−A114−B Machine Model (MM) JESD 22−A115−A *Whichever is less. Reverse bias protection feature valid only if Vout − Vin ≤ 7.0 V. http://onsemi.com 2 NCP3334 ELECTRICAL CHARACTERISTICS (Vout = 1.25 V (Vref) typical, Vin = 2.9 V, TA = −40°C to +85°C, unless otherwise noted.) Symbol Min Typ Max Unit Reference Voltage Accuracy Vin = 2.9 V to Vout + 4.0 V, IL = 0.1 mA to 500 mA, TA = 25°C Characteristic VREF −0.9% 1.239 1.25 +0.9% 1.261 V Reference Voltage Accuracy Vin = 2.9 V to Vout + 4.0 V, IL = 0.1 mA to 500 mA, TA = 0°C to +85°C VREF −1.4% 1.233 1.25 +1.4% 1.268 V Reference Voltage Accuracy (Note 1) Vin = 2.9 V to Vout + 4.0 V, IL = 0.1 mA to 500 mA, TA = −40°C to +150°C VREF −1.5% 1.231 1.25 +1.5% 1.269 V Line Regulation Vin = 2.9 V to 12 V, IL = 0.1 mA LineReg 0.04 mV/V Load Regulation Vin = 2.9 V, IL = 0.1 mA to 500 mA LoadReg 0.04 mV/mA Dropout Voltage, Vout = 2.5 V to 10 V IL = 500 mA (Note 2) IL = 300 mA IL = 50 mA IL = 0.1 mA VDrop mV 340 230 110 10 Peak Output Current (Notes 1 and 2) (See Figure 6) Ipk Vout ≤ 3.3 V Vout > 3.3 V Short Output Current (See Figure 6) 500 860 mA 900 1300 mA 990 Isc Thermal Shutdown TJSD Ground Current In Regulation IL = 500 mA (Note 2) IL = 300 mA (Note 2) IL = 50 mA IL = 0.1 mA IGND IGNDsh Output Noise IL = 500 mA, f = 10 Hz to 100 kHz, Cout = 10 mF Vnoise Shutdown Threshold Voltage ON Threshold Voltage OFF VTHSD °C 160 In Dropout Vin = Vout −0.1 V, IL = 0.1 mA In Shutdown VSD = 0 V 700 9.0 4.6 0.8 − 14 7.5 2.5 190 mA − 500 mA 0.07 1.0 mA mVrms 38 2.0 0.4 Vin ≤ 5.4 V Vin > 5.4 V mA V V ISD 0.07 1.0 5.0 mA Output Current In Shutdown Mode, Vout = 0 V IOSD 0.07 1.0 mA Reverse Bias Protection, Current Flowing from the Output Pin to GND (Vin = 0 V, Vout_forced = Vout (nom) ≤ 7 V) (Note 3) IOUTR 1.0 SD Input Current, VSD = 0 V to 0.4 V or VSD = 2.0 V to Vin mA RECOMMENDED OPERATING CONDITIONS Input Voltage VIN 1. For output current capability for TJ < 0°C, please refer to Figure 8. 2. TA must be greater than 0°C. 3. Reverse bias protection feature valid only if Vout − Vin ≤ 7.0 V. http://onsemi.com 3 2.6 12 V NCP3334 400 12 350 250 200 150 6 300 mA 4 50 mA 100 2 50 50 mA 0 0 0 20 40 60 80 100 120 140 TJ (°C) 0 80 TJ (°C) Figure 2. Dropout Voltage vs. Temperature Figure 3. Ground Current vs. Temperature 1.275 1000 1.270 900 1.265 800 1.260 700 Ipk (mA), Isc (mA) VOUT (V) 500 mA 8 300 mA IGND (mA) VDO (mV) 10 500 mA 300 1.255 1.250 1.245 1.240 40 60 100 120 140 Isc Ipk 600 500 400 300 1.235 200 1.230 100 1.225 −40 −20 20 0 0 20 40 60 80 100 120 0 140 20 40 60 80 100 120 TJ (°C) TJ (°C) Figure 4. Output Voltage vs. Temperature Figure 5. Peak and Short Current vs. Temperature 140 100 Vout (V) RR, RIPPLE REJECTION (dB) 0.97 Vout 90 80 70 50 500 mA 40 30 20 10 Vout = 2.5 V Cout = 10 mF TJ = 25°C 0 0.01 Ipk Isc Iout (mA) (For specific values of Ipk and Isc, please refer to Figure 5) 50 mA 250 mA 60 0.1 1.0 10 F, FREQUENCY (kHz) Figure 6. Output Voltage vs. Output Current Figure 7. Ripple Rejection vs. Frequency http://onsemi.com 4 100 NCP3334 0.8 15 0.7 Vin at Data Sheet Test Conditions, 25°C, 1 mF Capacitance −10°C 0°C 0.5 MAXIMUM ESR (W) IOUT, (A) 0.6 −40°C 0.4 −30°C 0.3 −20°C 0.2 10 Unstable Area 5.0 0.1 Stable Area 0 0 3.5 3.4 3.3 3.2 3.1 3.0 2.9 2.8 2.7 2.6 2.5 0 100 200 300 400 VIN, (V) OUTPUT CURRENT (mA) Figure 8. Output Current Capability when set at 2.5 V Vout Figure 9. Stability with ESR vs. Iout http://onsemi.com 5 500 NCP3334 APPLICATIONS INFORMATION Reverse Bias Protection Adjustable Operation Reverse bias is a condition caused when the input voltage goes to zero, but the output voltage is kept high either by a large output capacitor or another source in the application which feeds the output pin. Normally in a bipolar LDO all the current will flow from the output pin to input pin through the PN junction with limited current capability and with the potential to destroy the IC. Due to an improved architecture, the NCP3334 can withstand up to 7.0 V on the output pin with virtually no current flowing from output pin to input pin, and only negligible amount of current (tens of mA) flowing from the output pin to ground for infinite duration. Operation with output voltages in the range of 7 to 10 volts requires that the output to input voltage differential be less than 7 volts. The output voltage can be set by using a resistor divider as shown in Figure 1 with a range of 1.25 to 10 V. The appropriate resistor divider can be found by solving the equation below. The recommended current through the resistor divider is from 10 mA to 100 mA. This can be accomplished by selecting resistors in the kW range. As result, the Iadj*R2 becomes negligible in the equation and can be ignored. Input Capacitor The voltage dropout is measured at 97% of the nominal output voltage. ǒ Ǔ Vout + 1.25 * 1 ) R1 ) Iadj * R2 R2 (eq. 1) Example: For Vout = 2.9 V, can use R1 = 36 kW and R2 = 27 kW. ǒ Ǔ 1.25 * 1 ) 36 kW + 2.91 V 27 kW (eq. 2) Dropout Voltage An input capacitor of at least 1.0 mF, any type, is recommended to improve the transient response of the regulator and/or if the regulator is located more than a few inches from the power source. It will also reduce the circuit’s sensitivity to the input line impedance at high frequencies. The capacitor should be mounted with the shortest possible track length directly across the regulator’s input terminals. Thermal Considerations Internal thermal limiting circuitry is provided to protect the integrated circuit in the event that the maximum junction temperature is exceeded. This feature provides protection from a catastrophic device failure due to accidental overheating. This protection feature is not intended to be used as a substitute to heat sinking. The maximum power that can be dissipated, can be calculated with the equation below: Output Capacitor The NCP3334 remains stable with any type of capacitor as long as it fulfills its 1.0 mF requirement. There are no constraints on the minimum ESR and it will remain stable up to an ESR of 5.0 W. Larger capacitor values will improve the noise rejection and load transient response. PD + TJ(max) * TA RqJA (eq. 3) For improved thermal performance, contact the factory for the DFN package option. The DFN package includes an exposed metal pad that is specifically designed to reduce the junction to air thermal resistance, RqJA. Noise Reduction A 68 pF capacitor connected in parallel with R1 (see Figure 1) is recommended to reduce output noise and improve stability. ORDERING INFORMATION Package Shipping † NCP3334DADJG SO−8 (Pb−Free) 98 Units / Rail NCP3334DADJR2G SO−8 (Pb−Free) 2500 / 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 6 NCP3334 PACKAGE DIMENSIONS SOIC−8 CASE 751−07 ISSUE AH 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. −X− A 8 5 0.25 (0.010) S B 1 M Y M 4 K −Y− 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 Ǔ ǒinches *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. The products described herein NCP3334, may be covered by one or more of the following U.S. patents; 5,920,184, 5,966,004, and 5,834,926. There may be other patents pending. Micro8 is a trademark of International Rectifier. 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. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC 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 SCILLC was negligent regarding the design or manufacture of the part. SCILLC 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: N. American Technical Support: 800−282−9855 Toll Free Literature Distribution Center for ON Semiconductor USA/Canada P.O. Box 61312, Phoenix, Arizona 85082−1312 USA Phone: 480−829−7710 or 800−344−3860 Toll Free USA/Canada Japan: ON Semiconductor, Japan Customer Focus Center 2−9−1 Kamimeguro, Meguro−ku, Tokyo, Japan 153−0051 Fax: 480−829−7709 or 800−344−3867 Toll Free USA/Canada Phone: 81−3−5773−3850 Email: [email protected] http://onsemi.com 7 ON Semiconductor Website: http://onsemi.com Order Literature: http://www.onsemi.com/litorder For additional information, please contact your local Sales Representative. NCP3334/D