MP20046 Fast Transient Response, 2A Low Dropout Voltage Regulator The Future of Analog IC Technology DESCRIPTION FEATURES The MP20046 is a low dropout linear regulator supplying up to 2A current with 210mV dropout voltage. The output voltage is preset internally which ranges from 1.5V to 3.3V. • • • • • • • • An internal PMOS pass element is used to allow a low 75µA ground current at full load and drops down to 1uA when the device is disabled, making the MP20046 suitable for battery-power devices. Integrated power good (PG) function resets microcomputer and microprocessor systems in the event of an under voltage condition. MP20046 are designed to have fast response for larger load and line transient response. Other features include current limit and thermal protection. Up to 2A Output Current Low 210mV Dropout at 2A Fast Transient Response Open Drain Power-Good(PG) Status Output High 70dB at100Hz PSRR Low 17µVRMS Output Noise Current Limit and Thermal Protection Available in SOIC8 with Exposed Pad and 10-pin QFN Packages APPLICATIONS • • • Telecom Servers DSP, FPGA Supplies “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. The MP20046 is available in thermally enhanced SOIC8 package and 10-pin QFN package. TYPICAL APPLICATION IN VIN PG MP20046 CIN 47uF ON OFF EN OUT SENSE MP20046 Rev. 1.1 10/13/2010 PG R1 100k C1 1nF VOUT COUT 47uF www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 1 MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR ORDERING INFORMATION Part Number* Output Voltage Package Top Marking Junction Air Temperature (TJ) MP20046DN-F** 1.5V SOIC8E MP20046DQ-G 1.8V QFN10 (3x3) MP20046DN-J** 2.5V SOIC8E MP20046DQ-S** 3.3V QFN10 (3x3) MP20046DN-S** 3.3V SOIC8E M20046F 3J M20046J 9N M20046S -40oC to +85oC *Other output voltage versions between 1.5V and 3.3V, contact factory for availability. ORDERING GUIDE** MP20046D - -LF-Z Output Voltage See Output Voltage Selector Guide Table Package Type Q: QFN10 (3mm x 3mm) N: SOIC8E Operating Temperature Range D:Extended Temperature Range (-40OC to +85OC) ** For RoHS Compliant Packaging, add suffix - LF (e.g. MP20046D For Tape and Reel, add suffix -Z (e.g. MP20046D - - -LF); -LF-Z). OUTPUT VOLTAGE SELECTOR GUIDE Code F W G D Y H E J K T MP20046 Rev. 1.1 10/13/2010 VOUT 1.5 1.6 1.8 1.85 1.9 2.0 2.1 2.5 2.6 2.65 Code L M N V P Q X R S VOUT 2.7 2.8 2.85 2.9 3.0 3.1 3.15 3.2 3.3 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 2 MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR PACKAGE REFERENCE TOP VIEW SOIC8E VOUT 1 10 VIN VOUT 2 9 VIN VOUT 3 8 VIN SENSE 4 7 PG GND 5 6 EN QFN10(3x3) ABSOLUTE MAXIMUM RATINGS (1) Thermal Resistance (4) θJA θJC Supply Input Voltage................................... 6.5V Continuous Power Dissipation (TA = +25°C) SOIC8E .................................. 50 .......10... °C/W QFN10 (3x3)........................... 60 .......12... °C/W SOIC8E........ ........................................... 2.0W QFN10 (3x3) . ………………………………1.67W Junction Operation Temperature Range ............................................... -40°C to 150°C Storage Temperature Range ..... -65°C to 150°C Lead Temperature (Soldering, 10sec) .....260°C Notes: 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the maximum junction temperature TJ(MAX), the junction-toambient thermal resistance θJA, and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by PD(MAX)=(TJ(MAX)TA)/ θJA. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. 3) The device is not guaranteed to function outside of its operating conditions. 4) Measured on JESD51-7 4-layer board. (2) Recommended Operating Conditions (3) Supply Input Voltage.......................2.7V to 5.5V Enable Input Voltage .........................0V to 5.5V Operating Junct. Temp (TJ)...... -40°C to +125°C MP20046 Rev. 1.1 10/13/2010 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 3 MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR ELECTRICAL CHARACTERISTICS VIN=(VOUT (TYP) +1V) or +2.7V, IOUT=1mA, VEN=0V, COUT=47µF, TJ =-40°C to +125°C, unless otherwise noted. Typical values are at TA =+25°C. Parameter Symbol 1.5V 1.8V 2.5V 3.3V Output Voltage VOUT IGND Ground Pin Current Line Regulation ∆VOUT%/ VOUT (5) Load Regulation(6) ∆VOUT Output Voltage Noise Dropout Voltage (7) VDO Current Limit Standby Current EN Input High Threshold EN Input Low Threshold ILIM ISTBY VIH VIL Thermal Shutdown Temperature TSD Output Voltage AC PSRR PG PSRR Minimum Input Voltage for Valid PG Trip Threshold Voltage Hysteresis Voltage Output Low Voltage Leakage Current EN Input Current Condition 2.7V < VIN < 5.5V 2.8V < VIN < 5.5V 3.5V < VIN < 5.5V 4.3V < VIN < 5.5V IOUT = 1mA to 2A Min 1.485 1.782 2.475 3.267 VOUT + 1V < VIN ≤ 5.5V Typ 1.5 1.8 2.5 3.3 75 Max 1.515 1.818 2.525 3.333 300 Units 0.01 0.1 %/V IOUT = 1mA to 2A 10Hz to 30kHz, VOUT=3.3V, COUT=100µF IOUT=2A,,VOUT= 1.4V IOUT=2A, VOUT= 1.7V IOUT=2A, VOUT= 2.4V IOUT=2A,,VOUT= 3.2V VOUT=0V EN =VIN µA 4 mV 17 µVRMS 300 300 280 210 3.3 1 470 470 420 400 4.5 10 1.5 0.4 F=100Hz, COUT=100µF, IOUT=2A IOUT(PG)=300µA, V(PG) ≤ 0.8 V VOUT decreasing Measured at VOUT IOUT(PG)=1mA V(PG) = 5.5V EN =VIN EN =0V V mV A µA V V +150 °C 70 dB 78 1.15 0.15 -1 -1 0 1.6 V 86 %VOUT %VOUT V µA µA µA 0.4 1 1 1 Notes: 5) Line Regulation= VOUT ⎡ V ⎣ ⎤ IN(MAX ) ⎦ − VOUT ⎡ V ⎣ ⎤ IN(MIN) ⎦ ⎡V − VIN(MIN) ⎤ × VOUT(NOM) ⎣ IN(MAX ) ⎦ 6) Load Regulation= V OUT ⎡I ⎤ ⎣ OUT(MAX ) ⎦ × 100(% / V) − VOUT ⎡I ⎤ ⎣ OUT(MIN) ⎦ 7) Ramp down input voltage till output voltage equals VOUT(NOM) – 0.1V MP20046 Rev. 1.1 10/13/2010 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 4 MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR PIN FUNCTIONS SOIC8E Pin # QFN10 (3mm×3mm) Pin # Name Description 1, 2 1, 2, 3 VOUT Regulated output voltage 3 4 SENSE Output sense 4 5 5 6 EN Negative polarity enable ( EN ) input 6 7 PG Open-drain power-good (PG) output 7, 8 8, 9, 10 VIN Input voltage MP20046 Rev. 1.1 10/13/2010 GND/ Ground. Connect exposed pad to GND plane for optimal thermal Exposed Pad performance www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 5 MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR TYPICAL PERFORMANCE CHARACTERISTICS VIN=3.8V, VOUT =3.3V, CIN=COUT =47µF, TA=25oC, unless otherwise noted. Quiescent Current vs. Input Voltage 70 60 50 40 30 20 10 0 -40 -20 0 20 40 60 80 100120140 T E MP E R AT UR E (oC) 100 80 60 40 20 0 3.5 200 50 VEN (V) EN low threshold 0 -40 -20 0 20 40 60 80 100120140 T E MP E R AT UR E (oC) MP20046 Rev. 1.1 10/13/2010 0.5 EN low threshold 0.4 0.3 0.2 0.1 4 4.5 5 INP UT V OL T AG E (V ) 0 -40 -20 0 20 40 60 80 100120140 T E MP E R AT UR E (oC) 5.5 Line Regulation 3 2 1 0 3.5 4 4.5 5 INP UT V OL T AG E (V ) 5.5 OUT P UT V OL T AG E AC C UR AC Y (% ) 4 C UR R E NT L IMIT (A) C UR R E NT L IMIT (A) 0.6 Current Limit vs. Input Voltage 4 EN high threshold 0.7 EN high threshold 0.7 5 0 20 40 60 80 100120140 T E MP E R AT UR E (oC) EN threshold vs. Temperature 0.8 5 IOUT=2A 0 -40 -20 0.8 Current Limit vs. Temperature 1 50 1 0.4 3.5 0.5 1 1.5 2 OUT P UT C UR R E NT (A) 2 100 5.5 0.5 3 150 0.9 0.6 0 200 1.1 0.9 VEN (V) DR OP OUT V OL T AG E (mV ) 250 100 4 4.5 5 INP UT V OL TAGE(V ) 250 EN threshold vs. Input Voltage Dropout Voltage vs. Output Current 150 300 DR OP OUT V OL T AG E (mV ) 80 0 Dropout Voltage vs. Temperature 120 90 QU IE S C E NT C U R R E NT(uA ) QUIE S C E NT C UR R E NT (uA) Quiescent Current vs. Temperature 0.03% 0.02% 0.01% IOUT=1A 0.00% IOUT=0A -0.01% -0.02% -0.03% 3.5 4.0 4.5 5.0 INP UT V OL T AG E (V ) www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 5.5 6 MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN=3.8V, VOUT=3.3V, CIN=COUT =47µF, TA=25oC, unless otherwise noted. Output Voltage Accuracy vs. Temperature 0.10% 0.08% 0.06% 0.04% 0.02% 0.00% -0.02% 0 0.5 1 1.5 2 PSRR IOUT=2A f ranges from 10Hz to 1MHz 0.30% 100 90 0.20% 80 70 0.10% PSRR(dB) OUTPUT VOLTAGE ACCURACY(%) OUTPUT VOLTAGE ACCURACY(%) Load Regulation 0.00% -0.10% 60 50 40 30 20 -0.20% 10 -0.30% -40 -20 0 20 40 60 80 0 10 102 T E MP E R AT UR E (oC) OUT P UT C UR R E NT (A) 103 104 105 106 FREQUENCY (Hz) Region of Stable COUT ESR vs. Output Current 100 10 Unstable Range 1 Stable Range 0.1 0 0.5 1 1.5 OUTPUT CURRENT (A) MP20046 Rev. 1.1 10/13/2010 2 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 7 MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN=3.8V, VOUT=3.3V, CIN=COUT =47µF, TA=25oC, unless otherwise noted. VEN 5V/div. VIN 1V/div. VIN 1V/div. VOUT 1V/div. PG 1V/div. IOUT 2A/div. VOUT 1V/div. PG 1V/div. IOUT 2A/div. VOUT 1V/div. PG 1V/div. IOUT 2A/div. VIN 1V/div. VOUT (AC) 10mV/div. VOUT (AC) 10mV/div VIN 1V/div IOUT 100mA/div. IOUT 1A/div VEN 5V/div. VOUT 1V/div. PG 1V/div. IOUT 2A/div. VOUT (AC) 50mV/div IOUT 1A/div MP20046 Rev. 1.1 10/13/2010 VOUT (AC) 100mV/div IOUT 1A/div VIN 2V/div VOUT 2V/div IOUT 2A/div www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 8 MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN=3.8V, VOUT=3.3V, CIN=COUT =47µF, TA=25oC, unless otherwise noted. Short Protection Steady State VIN=3.8V, VOUT=3.3V Short Out to GND VIN 2V/div VOUT 2V/div VIN 2V/div IOUT 2A/div IOUT 2A/div VIN=3.8V, VOUT=3.3V Short Out to GND VOUT 2V/div 2ms/div MP20046 Rev. 1.1 10/13/2010 Short Protection Recovery 20ms/div www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 9 MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR FUNCTION BLOCK DIAGRAM Figure 1—Block Diagram of Low Dropout Regulation MP20046 Rev. 1.1 10/13/2010 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 10 MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR OPERATION The MP20046 is a low dropout linear regulator supplying up to 2A current. It is intended for use in devices that require very low dropout voltage, low quiescent, low noise and high PSRR such as wireless LAN, battery powered equipment and hand-held equipment. The MP20046 uses an internal PMOS as the pass element and features internal thermal shutdown and internal current limit circuit. Dropout Voltage Dropout voltage is the minimum input to output differential voltage required for the regulator to maintain an output voltage within 100mV of its nominal value. Because the PMOS pass element behaves as a low-value resistor, the dropout voltage of MP20046 is very low. Shutdown The MP20046 can be switched ON or OFF by a logic input at the EN pin. A high voltage at this pin will turn the device off. When the EN pin is low, the regulator output is on. The EN pin should be tied to GND to keep the regulator output always on if the application does not require the shutdown feature. Do not float the EN pin. Current Limit The MP20046 includes a current limit structure which monitors and controls PMOS’s gate voltage to limit the guaranteed maximum output current to 3.3A. MP20046 Rev. 1.1 10/13/2010 Power Good The power good pin is an open collector output connected to OUT with a pull up resistor. It monitors the output voltage, and if the output voltage deceases below 83% of its regulation point, the PG pin becomes low. Enlarging pull up resistor or bypass capacitor will extend the set up time of PG output. Thermal Protection Thermal protection turns off the PMOS when the junction temperature exceeds +150ºC, allowing the IC to cool. When the IC’s junction temperature drops by 20ºC, the PMOS will be turned on again. Thermal protection limits total power dissipation in the MP20046. For reliable operation, junction temperature should be limited to 125 ºC maximum. Load-Transient Considerations The output response of load-transient consists of a DC shift and transient response. Because of the excellent load regulation of MP20046, the DC shift is very small. For external circuit, the output voltage transient depends on the output capacitor’s value and the ESR. Increasing the capacitance and decreasing the ESR will improve the transient response. www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 11 MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR APPLICATION INFORMATION Power Dissipation The power dissipation for any package depends on the thermal resistance of the case and circuit board, the temperature difference between the junction and ambient air, and the rate of air flow. The power dissipation across the device can be represented by the equation: P = (VIN − VOUT )× IOUT The allowable power dissipation can calculated using the following equation: be P(MAX) = (TJunction − TAmbient ) / θ JA Where (TJunction − TAmbient) is the temperature difference between the junction and the surrounding environment, θJA is the thermal resistance from the junction to the ambient environment. Connecting the GND pin of MP20046 to ground using a large pad or ground plane helps to channel heat away. Output Noise Output noise voltage is the RMS output noise voltage over a given range of frequencies (10Hz to 30kHz) under the conditions of a constant output current and a ripple-free input voltage. Most of noise is caused by the internal voltage reference. A precision bandgap reference of MP20046 is used to generate the internal reference voltage. And a low pass filter is also used to reduce the output noise. These make the output noise of MP20046 low to 17uVRMS over the range of the full load. Power Supply Rejection Ratio (PSRR) Power supply rejection ratio (PSRR), also known as ripple rejection, measures the LDO MP20046 Rev. 1.1 10/13/2010 regulator’s ability to prevent the regulated output voltage fluctuating caused by input voltage variations. The ripple rejection is defined by PSRR = VIN , ripple at all frequencies VOUT , ripple The control loop tends to be the dominant contributor of supply rejection. The output capacitor of large value and low ESR, and adding by-pass capacitors will improve the PSRR performance. Input Capacitor Selection For a typical application, an input bypass capacitor is recommended for device stability. This capacitor should be as close to the input pins as possible. For fast transient conditions where droop at the input of the LDO may occur because of high inrush current, it is recommended to place a larger capacitor at the input as well. The size of this capacitor depends on the output current and response time of the main power supply, as well as the distance to the load (LDO). Output Capacitor Selection The MP20046 is designed specifically to work with very low ESR ceramic output capacitor in space-saving and performance consideration. A 47µF ceramic capacitor with ESR lower than 1.5Ω is suitable for the MP20046 application circuit. Output capacitor of larger values will help to improve load transient response and reduce noise with the drawback of increased size. www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 12 MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR PACKAGE INFORMATION 3mm×3mm QFN10 2.90 3.10 0.30 0.50 PIN 1 ID MARKING 0.18 0.30 2.90 3.10 PIN 1 ID INDEX AREA 1.45 1.75 PIN 1 ID SEE DETAIL A 10 1 2.25 2.55 0.50 BSC 5 6 TOP VIEW BOTTOM VIEW PIN 1 ID OPTION A R0.20 TYP. PIN 1 ID OPTION B R0.20 TYP. 0.80 1.00 0.20 REF 0.00 0.05 SIDE VIEW DETAIL A NOTE: 2.90 0.70 1) ALL DIMENSIONS ARE IN MILLIMETERS. 2) EXPOSED PADDLE SIZE DOES NOT INCLUDE MOLD FLASH. 3) LEAD COPLANARITY SHALL BE 0.10 MILLIMETER MAX. 4) DRAWING CONFORMS TO JEDEC MO-229, VARIATION VEED-5. 5) DRAWING IS NOT TO SCALE. 1.70 0.25 2.50 0.50 RECOMMENDED LAND PATTERN MP20046 Rev. 1.1 10/13/2010 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 13 MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR SOIC8E 0.189(4.80) 0.197(5.00) 8 0.124(3.15) 0.136(3.45) 5 0.150(3.80) 0.157(4.00) PIN 1 ID 1 0.228(5.80) 0.244(6.20) 0.089(2.26) 0.101(2.56) 4 TOP VIEW BOTTOM VIEW SEE DETAIL "A" 0.013(0.33) 0.020(0.51) 0.051(1.30) 0.067(1.70) SEATING PLANE 0.000(0.00) 0.006(0.15) 0.0075(0.19) 0.0098(0.25) SIDE VIEW 0.050(1.27) BSC FRONT VIEW 0.010(0.25) x 45o 0.020(0.50) GAUGE PLANE 0.010(0.25) BSC 0.050(1.27) 0.024(0.61) 0o-8o 0.016(0.41) 0.050(1.27) 0.063(1.60) DETAIL "A" 0.103(2.62) 0.213(5.40) NOTE: 0.138(3.51) RECOMMENDED LAND PATTERN 1) CONTROL DIMENSION IS IN INCHES. DIMENSION IN BRACKET IS IN MILLIMETERS. 2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. 3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. 4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.004" INCHES MAX. 5) DRAWING CONFORMS TO JEDEC MS-012, VARIATION BA. 6) DRAWING IS NOT TO SCALE. NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. MP20046 Rev. 1.1 10/13/2010 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 14