NCP2860 Advance Information 300 mA Very Low Noise LDO The NCP2860 is a low noise, low dropout linear regulator that has been designed to supply 2.77 V/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. http://onsemi.com Features • • • • • • • • MARKING DIAGRAM High Output Current (300 mA Max) Low Output Voltage Noise: 60 µVrms 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 kHz) FAULT Indicator Programmable Output Voltage 8 Micro8 DM SUFFIX CASE 846A 8 LCZ AYW 1 1 A = Assembly Location Y = Year W = Work Week Typical Applications • Cellular Phone • Handheld Instruments PIN CONNECTIONS IN OUT 1 8 FAULT IN 2 7 STDWN GND 3 6 N.C. OUT 4 5 SET FAULT (Top View) ORDERING INFORMATION Fault Detect Device NCP2860DM277R2 Error Amplifier Bandgap STDWN – + Shipping Micro8 4000 Units/Reel Drive and Current Limiting OUTPUT BUFFER SHUTDOWN Thermal Sensor Package OUT SET Rint1 Feedback Selection Rint2 GND This document contains information on a new product. Specifications and information herein are subject to change without notice. Semiconductor Components Industries, LLC, 2001 June, 2001 – Rev. 1 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 µF 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 Symbol Value Vinmax –0.3, +6.0 V – TBD °C/W Maximum Junction Temperature TJmax 150 °C Storage Temperature Range TSmax – 65 to +150 °C Lead Temperature (Soldering, 10s) TLmax 300 °C Input Voltage, Shutdown Pin, Voltage Range Thermal Resistance http://onsemi.com 2 Unit NCP2860 TYPICAL ELECTRICAL CHARACTERISTICS* (Vin = 3.6 V, SET = GND, TA from –25°C to +85°C, unless otherwise noted.) Characteristic Symbol Min Typ Max Unit Output Voltage @ Iout = 100 µA, 300 mA, Vin = 3.2 V and TA = 25°C TA from –25°C to +85°C 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 µA Supply Current @ Iout = 300 mA, Vin = 3.2 V Icc–300 – 1.1 – mA Supply Current in Shutdown Mode (STDWN Pin Grounded) @ Vin = 3.2 V and TA = 25°C Istdwn – 0.01 1.0 µA Dropout Voltage @ Iout = 1.0 mA (Note 1) Vdrop–1 – 0.6 – mV Dropout Voltage @ Iout = 150 mA (Note 1) Vdrop–150 – 75 150 mV Dropout Voltage @ Iout = 300 mA (Note 1) Vdrop–300 – 150 – 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 Imax_cc 310 465 700 mA Short Circuit Output Current Limitation Start–Up Current Limitation @ TA = 25°C Imax_stup 150 220 290 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 Output Voltage Noise @ SET = OUT, Cout = 22 µF and 10 Hz f 100 kHz (Note 2) – – 35 – µVrms Output Voltage Noise @ SET = GND, Cout = 22 µF, and 10 Hz f 100 kHz (Note 2) – – 60 – µVrms Output Voltage Noise Density @ SET = GND, Cout = 22 µF, 10 Hz f 100 kHz (Note 2) – – 400 – nV(Hz)–1/2 Power Supply Rejection Ratio @ 1.0 kHz and Iout = 100 mA PSRR – 60 – dB Shutdown Threshold (with hysteresis) Vstdwn 0.4 – 2.0 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 µF, Vout = 2.7 V (Note 2) Tstup – 135 – µs Thermal Shutdown Threshold Tlimit – 170 – °C Thermal Shutdown Hysteresis Htemp – 30 – °C *The specification gives the targeted values. This specification may have to be slightly adjusted after the temperature characterization of the die. 1. The dropout voltage is defined as (Vin–Vout) when Vout is 100 mV below the value of Vout when Vin = 3.1 V. 2. 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 7 30 53 100 77 Figure 1. Normalized Output Voltage vs. Load Current Figure 2. Normalized Output Voltage vs. Temperature 600 1000 500 800 TA = –40°C TA = 85°C 600 TA = 25°C 400 200 0 40 80 120 160 200 TA = 25°C TA = +85°C 400 300 TA = –40°C 200 100 0 0.00 280 240 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 FAULT DETECT THRESHOLD (mV) 180 160 DROPOUT VOLTAGE (mV) –17 TEMPERATURE (°C) 1200 0 –40 LOAD CURRENT (mA) SUPPLY CURRENT (µA) SUPPLY CURRENT (µA) 0 Vout Normalized at 30°C, Iout = 0 140 TA = 25°C 120 TA = 85°C 100 80 TA = –40°C 60 40 20 0 0 50 100 150 200 250 200 150 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 Cout = 2.2 µF –30 PSSR (dB) NOISE (nV/sqrt Hz) –10 10000 Vin = 3.26 V SET = GND Iload = 10 mA 1000 –40 Cout = 22 µF –50 RMS Noise 10 Hz to 100 kHz: 59 µVrms –60 100 –70 Vin = Vout + 1 V Cout = 22 µF Iload = 10 mA –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) 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) 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 Ω 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 = 1.25 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 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. 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. Thermal Protection The thermal protection protects the die against excessive overheating. Practically, when the junction temperature exceeds 170°C, 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 pull–up resistor is generally selected in the range of 100 kΩ to minimize the current consumption. Output Voltage Setting The output voltage that is set to 2.77 V if the “SET’’ pin is grounded, can 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: Vout = 1.25 * (1 + R1/R2). http://onsemi.com 7 NCP2860 IN FAULT (2) (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 µF OUT OUTPUT BUFFER (1,4) R1 Rint2 C2 2.2 µF SET (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 OUTPUT BUFFER SHUTDOWN Rint1 (7) C1 2.2 µF Thermal Sensor (1,4) C2 2.2 µF Feedback Selection BATTERY OUT Rint2 SET (5) GND (3) Figure 16. Application for 2.77 V Output Voltage http://onsemi.com 8 NCP2860 PACKAGE DIMENSIONS Micro8 DM SUFFIX CASE 846A–02 ISSUE E 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. –A– –B– K PIN 1 ID G D 8 PL 0.08 (0.003) –T– M T B A S S SEATING PLANE 0.038 (0.0015) C H L J http://onsemi.com 9 DIM A B C D G H J K L MILLIMETERS MIN MAX 2.90 3.10 2.90 3.10 --1.10 0.25 0.40 0.65 BSC 0.05 0.15 0.13 0.23 4.75 5.05 0.40 0.70 INCHES MIN MAX 0.114 0.122 0.114 0.122 --0.043 0.010 0.016 0.026 BSC 0.002 0.006 0.005 0.009 0.187 0.199 0.016 0.028 NCP2860 Notes http://onsemi.com 10 NCP2860 Notes http://onsemi.com 11 NCP2860 Micro8 is a trademark of International Rectifier. ON Semiconductor and are 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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PUBLICATION ORDERING INFORMATION Literature Fulfillment: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303–675–2175 or 800–344–3860 Toll Free USA/Canada Fax: 303–675–2176 or 800–344–3867 Toll Free USA/Canada Email: [email protected] JAPAN: ON Semiconductor, Japan Customer Focus Center 4–32–1 Nishi–Gotanda, Shinagawa–ku, Tokyo, Japan 141–0031 Phone: 81–3–5740–2700 Email: [email protected] ON Semiconductor Website: http://onsemi.com For additional information, please contact your local Sales Representative. N. American Technical Support: 800–282–9855 Toll Free USA/Canada http://onsemi.com 12 NCP2860/D