NCP2860 300 mA Very Low Noise, Low Dropout Linear Regulator The NCP2860 is a low noise, low dropout linear regulator that is offered with an output voltage of 2.77 V. It supplies 300 mA from 3.0 V to 6.0 V input. If wished, the “SET’’ pin enables to adjust the output voltage level that then depends on the voltage applied to this pin. The excellent performances that the NCP2860 features in terms of transient responses, PSRR and noise, make it an ideal solution for audio applications (e.g., audio amplifier drivers). http://onsemi.com Features • • • • • • • • • • 1 High Output Current (300 mA Max) Low Output Voltage Noise: 60 Vrms Low Dropout (150 mV @ Iout = 300 mA) Thermal Overload and Short Circuit Protections Very Low Consumption in Shutdown Mode (10 nA) High Power Supply Rejection Ratio (60 dB @ 1.0 kHz) FAULT Indicator Programmable Output Voltage Soft−Start Pb−Free Package is Available Micro8t DM SUFFIX CASE 846A MARKING DIAGRAM LCZ AYW G G Typical Applications • Cellular Phone • Handheld Instruments 1 IN LCZ = Specific Device Code A = Assembly Location Y = Year W = Work Week G = Pb−Free Package (Note: Microdot may be in either location) FAULT Fault Detect PIN CONNECTIONS Error Amplifier Bandgap STDWN − + Drive and Current Limiting OUTPUT BUFFER SHUTDOWN Thermal Sensor OUT OUT 1 8 FAULT IN 2 7 STDWN GND 3 6 N.C. OUT 4 5 SET (Top View) Rint1 Feedback Selection ORDERING INFORMATION Rint2 Device NCP2860DM277R2 NCP2860DM277R2G GND © Semiconductor Components Industries, LLC, 2006 April, 2006 − Rev. 8 Package Shipping † Micro8 4000/Tape & Reel Micro8 4000/Tape & Reel (Pb−Free) SET †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. 1 Publication Order Number: NCP2860/D NCP2860 PIN DESCRIPTION Pin Name Description 1, 4 OUT 2 IN 3 GND Ground 5 SET Ground the “SET’’ pin to set the output voltage to 2.77 V. Refer to the “output voltage setting’’ paragraph if you need to program another value. 6 N.C. This pin is non−connected. 7 STDWN 8 FAULT “OUT’’ is the regulator output. A low ESR, bypass capacitor should be connected for stable operation. “IN’’ is the supply input that is connected to the power source (up to 6.0 V). Bypass with a 2.2 F capacitor. If the “STDWN’’ pin is low, the circuit enters the shutdown mode. The “FAULT’’ terminal is a high impedance, open drain output. If the circuit is out of regulation, the voltage pin goes low. Otherwise (normal operation or shutdown mode), this pin is high impedance. Connect the pin to ground, if unused. MAXIMUM RATINGS Rating Input Voltage, Shutdown Pin, Voltage Range (Note 1) Thermal Resistance (Note 2) Symbol Value Unit Vinmax −0.3, +6.0 V − 230 °C/W Maximum Junction Temperature TJmax 150 °C Storage Temperature Range TSmax − 65 to +150 °C Lead Temperature (Soldering, 10s) TLmax 300 °C ESD Capability Human Body Model Machine Model − − 2.0 200 kV V Latchup Capability @ 85°C − +/−100 mA 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. 1. The recommended input voltage range for NCP2860 proper operation is 2.7 V to 6.0 V. 2. Circuit being mounted on a board that has no metal oxide traces attached to the leads. The addition of plated copper can lower the thermal resistance. http://onsemi.com 2 NCP2860 TYPICAL ELECTRICAL CHARACTERISTICS (Note 3) (Vin = 3.6 V, SET = GND, TA from −25°C to +85°C, unless otherwise noted.) Symbol Min Typ Max Unit Output Voltage @ Iout = 100 A, 300 mA, Vin = 3.2 V and TA = 25°C TA from −25°C to +85°C Characteristic (2.7 V Option) Vout 2.73 2.70 2.77 2.77 2.81 2.84 V Supply Current @ Iout = 0, Vin = 3.2 V Icc−0 − 355 700 A Supply Current @ Iout = 300 mA, Vin = 3.2 V Icc−300 − 1.1 − mA Supply Current in Shutdown Mode (STDWN Pin Grounded) @ TA = 25°C Istdwn − 0.01 1.0 A Dropout Voltage @ Iout = 1.0 mA (Note 4) Vdrop−1 − 0.6 − mV Dropout Voltage @ Iout = 150 mA (Note 4) Vdrop−150 − 75 150 mV Dropout Voltage @ Iout = 300 mA (Note 4) Vdrop−300 − 150 250 mV SET Threshold (SET = OUT) @ Iout = 1.0 mA and Vin = 3.6 V or 6.0 V, TA = 25°C TA from −25°C to +85°C Vref 1.226 1.220 1.244 1.244 1.262 1.270 V SET Input Leakage Current @ VSET = 1.25 V and TA = 25°C Ileak − 10 200 nA Short Circuit Output Current Limitation @ Vin = 3.2 V and Vout = 2.2 V Imax_cc 310 465 700 mA Start−Up Current Limitation @ TA = 25°C, Vin = 3.2 V and Vout = 2.2 V Imax_stup − 220 − mA Line Regulation, Vin varying between 3.0 V and 6.0 V @ Iout = 1.0 mA LineReg1 −0.1 0.01 0.1 %/V Line Regulation, Vin varying between 3.0 V and 6.0 V @ Iout = 10 mA LineReg2 −0.1 0.01 0.1 %/V Line Regulation, Vin varying between 3.0 V and 6.0 V @ Iout = 1.0 mA and (SET = OUT) LineReg3 −0.1 0.03 0.1 %/V Line Regulation, Vin varying between 3.0 V and 6.0 V @ Iout = 10 mA and (SET = OUT) LineReg4 −0.1 0.03 0.1 %/V Load Regulation, Iout varying from 0.1 mA to 300 mA, SET = OUT, @ Vin = 3.2 V LoadReg1 − 0.0002 − %/mA Load Regulation, Iout varying from 0.1 mA to 300 mA, SET Grounded, @ Vin = 3.2 V LoadReg2 − 0.001 − %/mA − − 15 35 − − − − 35 60 − − − 400 − nV(Hz)−1/2 Output Voltage Noise @ SET = OUT, Cout = 22 F (Note 5) 10 Hz t f t 10 kHz 10 Hz t f t 100 kHz − Output Voltage Noise @ SET = GND, Cout = 22 F (Note 5) 10 Hz t f t 10 kHz 10 Hz t f t 100 kHz − Output Voltage Noise Density @ SET = GND, Cout = 22 F, 10 Hz t f t 100 kHz (Note 5) − Vrms Vrms Power Supply Rejection Ratio @ 1.0 kHz and Iout = 100 mA PSRR − 60 − dB Shutdown Threshold (with hysteresis) @ Vin = 5.0 V Vstdwn 0.63 − 2.65 V Shutdown Pin Bias Current @ STDWN = IN or GND and TA = 25°C lstdwn − − 100 nA FAULT Detection Voltage @ Iout = 200 mA Vfault−th − 120 280 mV FAULT Output Low Voltage @ Isink = 2.0 mA Vfault−out − 0.15 0.4 V FAULT Output OFF Leakage Current @ TA = 25°C Ifault − 0.1 100 nA Start−Up Time @ Cout = 10 F, Vout = 2.7, Iout = 100 mA (Note 5) Tstup − 60 − s Thermal Shutdown Threshold Tlimit − 170 − °C Thermal Shutdown Hysteresis Htemp − 30 − °C 3. The specification gives the targeted values. This specification may have to be slightly adjusted after the temperature characterization of the die. 4. The dropout voltage is defined as (Vin−Vout) when Vout is 100 mV below the value of Vout when Vin = 3.1 V. 5. Refer to characterization curves for more details. http://onsemi.com 3 NCP2860 TYPICAL ELECTRICAL CHARACTERISTICS (Vin = Vout + 0.5 V, Cin = Cout = 2.2 F, SET = GND, TA = 25°C, unless otherwise noted.) 0.80 0.4 Iout = 100 mA 0.2 OUTPUT VOLTAGE (%) OUTPUT VOLTAGE (%) Vout Normalized at Iout = 0 0.40 0.00 −0.40 Iout = 0 mA 0.0 −0.2 Iout = 200 mA −0.4 −0.6 −0.8 −1.0 −0.80 60 120 180 240 −1.2 300 −40 −17 7 30 53 TEMPERATURE (°C) Figure 1. Normalized Output Voltage vs. Load Current Figure 2. Normalized Output Voltage vs. Temperature 1200 600 1000 500 800 TA = −40°C TA = 85°C 600 TA = 25°C 400 200 TA = 25°C TA = +85°C 400 300 TA = −40°C 200 100 Vout = 2.77 V Vout = 2.77 V 0 0 40 80 120 160 200 240 0 0.00 280 0.90 1.75 2.60 3.45 4.30 5.15 6.00 LOAD CURRENT (mA) INPUT VOLTAGE (V) Figure 3. Supply Current vs. Load Current Figure 4. No Load Supply Current vs. Input Voltage 250 180 140 FAULT DETECT THRESHOLD (mV) Vout = 2.77 V 160 DROPOUT VOLTAGE (mV) 100 77 LOAD CURRENT (mA) SUPPLY CURRENT (A) SUPPLY CURRENT (A) 0 Vout Normalized at 30°C, Iout = 0 TA = 25°C 120 TA = 85°C 100 80 TA = −40°C 60 40 20 0 0 50 100 150 200 250 Vout = 2.77 V 200 150 FAULT = HIGH 100 50 FAULT = LOW 0 0 300 50 100 150 200 250 LOAD CURRENT (mA) LOAD CURRENT (mA) Figure 5. Dropout Voltage vs. Load Current Figure 6. Fault Detect Threshold vs. Load Current http://onsemi.com 4 300 NCP2860 TYPICAL ELECTRICAL CHARACTERISTICS (Vin = Vout + 0.5 V, Cin = Cout = 2.2 F, SET = GND, TA = 25°C, unless otherwise noted.) 0 −20 PSSR (dB) −30 NOISE (nV/sqrt Hz) −10 10000 Vin = 3.26 V SET = GND Iload = 10 mA Vout = 2.77 V Cout = 2.2 F 1000 −40 Cout = 22 F −50 RMS Noise 10 Hz to 100 kHz: 59 Vrms −60 100 Vin = Vout + 1 V Cout = 22 F Iload = 10 mA Vout = 2.77 V −70 −80 −90 0.01 0.1 1 10 100 1000 10 0.01 0.10 1 10 100 1000 FREQUENCY (kHz) FREQUENCY (kHz) Figure 7. Power Supply Rejection Ratio Figure 8. Output Noise Spectral Density 4.3 V C4 Max 2.780 V Vout (200 mV/div) Vin 3.3 V C4 Mean 2.7612 V Vin = Vout + 200 mV ILoad = 200 mA C4 Min 2.716 V 200 mA Iload Vout 0 mA 10 mV/div Figure 9. Load Transient Response Figure 10. Line Transient http://onsemi.com 5 NCP2860 TYPICAL ELECTRICAL CHARACTERISTICS (Vin = Vout + 0.5 V, Cin = Cout = 2.2 F, SET = GND, TA = 25°C, unless otherwise noted.) Vin (0.5 V/div) NCP2860DM277 NCP2860DM277 C4 Max 2.77 V C4 Max 2.79 V C4 Mean 712 mV Vin (0.5 V/div) Vout (0.5 V/div) C4 Mean 711 mV C4 Min −30 mV C4 Min −30 mV FAULT (2 V/div) FAULT (2 V/div) Vout (0.5 V/div) Figure 12. Power−Up Response (Iload = 100 mA) Figure 11. Power−Down Response (Iload = 100 mA) NCP2860DM277 NCP2860DM277 C4 Max 2.84 V C4 Max 2.84 V Vout (1 V/div) C4 Mean 1.496 V Vout (1 V/div) C4 Min −40 mV C4 Mean 1.374 V C4 Min 0V STDWN (2 V/div) STDWN (2 V/div) Figure 13. Shutdown/Power−Up (Vin = Vout + 0.5 V, Iload = 50 mA) Figure 14. Shutdown/Power−Up (Vin = Vout + 0.5 V, Iload = 0 mA) http://onsemi.com 6 NCP2860 DETAILED OPERATING DESCRIPTION Internal Pass Transistor The NCP2860 incorporates a 0.5 typical P−channel MOSFET pass transistor. The P−channel MOSFET requires no drive current and then compared to the PNP based regulators, this solution drastically reduces the quiescent current and associated losses. If the output voltage is directly applied to the “SET’’ pin, Vout = Vref = 1.244 V. Vout OUT Shutdown Block The circuit turns into shutdown mode when the shutdown pin is in low state. In this mode, the internal biasing current sources are disconnected so that the pass transistor is off and the consumption reduced to a minimum value. Practically, the shutdown consumption is in the range of 10 nA. When this function is unused, “IN’’ is generally applied to the shutdown pin. R1 SET R2 NCP2860 Regulation The circuit incorporates a transconductance error amplifier. The error amplifier output varies in response to load and input voltage variations to control the pass transistor current so that the “OUT’’ pin delivers the wished voltage. No compensation capacitor is required. Current Limitation The NCP2860 incorporates a short circuit protection that prevents the pass transistor current from exceeding 465 mA typically. The current limit is set to 220 mA during the start−up phase. Thermal Protection The thermal protection protects the die against excessive overheating. Practically, when the junction temperature exceeds 170°C for the 2.77 V option and 150°C for the 3.0 V option, an internal thermal sensor sends a logical signal to the shutdown block so that the circuit enters the shutdown mode. Once the die has cooled enough (typically 30°C), the circuit enters a new working phase. Fault Detection Circuitry The circuit detects when the input−output differential voltage is too low to ensure a correct load and line regulation at the output. The input−output differential threshold scales proportionally with the load current to be always just higher than the dropout. When the circuit detects a fault condition, an internal switch connects “FAULT’’ to ground. In normal operation, the “FAULT’’ terminal is an open−drain−N−channel MOSFET and if a pull−up resistor is connected between “OUT’’ and “FAULT’’, “FAULT’’ goes high. The pullup resistor is generally selected in the range of 100 k to minimize the current consumption. Output Voltage Setting The output voltage is set to 2.77 V if the “SET’’ pin is grounded. It can also be programmed to a different value. To do so, a portion of the output voltage must be applied to the “SET’’ pin. If a (R1, R2) resistors divider is used, then: Vout = (1 + R1/R2) * Vref Therefore, as Vref typically equals 1.244 V: Vout = 1.244 * (1 + R1/R2). Application Information It is recommended to use 2.2 F capacitors on the input and on the output of the NCP2860. Capacitor type is not very critical. Simply the ESR should be lower than 0.5 to ensure a stable operation over the temperature and output current ranges. It could be convenient to increase the capacitor size and its quality (lower ESR) only if it was necessary to further improve the noise performances, the Power Supply Rejection Ratio or the fast transient response. Now if R1 and R2 are high impedance resistors, the leakage current that is absorbed by the “SET’’ pin, may have to be taken into account as follows: Vout = [1.244 * (1 + R1/R2)] + (R1*Ilk) where Ilk is the “SET’’ pin leakage current. http://onsemi.com 7 NCP2860 IN (2) FAULT (8) R3 100 k Fault Detect Error Amplifier BANDGAP STDWN − + Drive and Current Limiting SHUTDOWN Rint1 (7) Feedback Selection BATTERY Thermal Sensor C1 2.2 F OUT OUTPUT BUFFER (1,4) R1 Rint2 SET C2 2.2 F (5) R2 GND (3) Figure 15. With External Output Voltage Adjustment IN (2) FAULT (8) R3 100 k Fault Detect Error Amplifier BANDGAP STDWN − + Drive and Current Limiting SHUTDOWN Rint1 (7) Thermal Sensor Rint2 GND (3) Figure 16. Application for 2.77 V Output Voltage http://onsemi.com 8 (1,4) C2 2.2 F Feedback Selection BATTERY C1 2.2 F OUT OUTPUT BUFFER SET (5) NCP2860 PACKAGE DIMENSIONS Micro8 CASE 846A−02 ISSUE G NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSION A DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.15 (0.006) PER SIDE. 4. DIMENSION B DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. INTERLEAD FLASH OR PROTRUSION SHALL NOT EXCEED 0.25 (0.010) PER SIDE. 5. 846A−01 OBSOLETE, NEW STANDARD 846A−02. D HE PIN 1 ID E e b 8 PL 0.08 (0.003) M T B S A S SEATING −T− PLANE 0.038 (0.0015) MILLIMETERS NOM MAX −− 1.10 0.08 0.15 0.33 0.40 0.18 0.23 3.00 3.10 3.00 3.10 0.65 BSC 0.40 0.55 0.70 4.75 4.90 5.05 DIM A A1 b c D E e L HE MIN −− 0.05 0.25 0.13 2.90 2.90 INCHES NOM −− 0.003 0.013 0.007 0.118 0.118 0.026 BSC 0.016 0.021 0.187 0.193 MIN −− 0.002 0.010 0.005 0.114 0.114 MAX 0.043 0.006 0.016 0.009 0.122 0.122 0.028 0.199 A A1 L c SOLDERING FOOTPRINT* 8X 1.04 0.041 0.38 0.015 3.20 0.126 6X 8X 4.24 0.167 0.65 0.0256 5.28 0.208 SCALE 8:1 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. 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. 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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 9 ON Semiconductor Website: http://onsemi.com Order Literature: http://www.onsemi.com/litorder For additional information, please contact your local Sales Representative. NCP2860/D