MP20045 Low Noise, 1A Linear Regulator The Future of Analog IC Technology DESCRIPTION FEATURES The MP20045 is a low-dropout linear regulator supplies up to 1A current with 140mV dropout voltage. The output voltage is set externally which ranges from 1.5V to 5V by operating from +2.5V to +5.5V input or can be preset internally from 1.5V to 5V. • • • • An internal PMOS pass element is used to allow a low 110µA ground current, making the MP20045 suitable for battery-power devices. Other features include low-power shutdown, short-circuit and thermal protection. The MP20045 is available in 8-pin QFN (3mm x 3mm) and SOIC8E packages. • • • • • Up to 1A Output Current Low 140mV Dropout at 1A Low 110µA Ground Current Fixed Output Versions Ranging from 1.5V to 5V and Adjustable Versions Open Drain Power-Good Status Output 13µVRMS Low Noise Output 56dB PSRR at 1kHz Current Limiting and Thermal Protection 3mm×3mm QFN8 and SOIC8E Packages APPLICATIONS • • • • • • Notebook Computers Cordless Telephones Cellular Phones Modems Hand-Held Instruments PDA and Palmtop Computers “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION VIN R3 100k VIN VOUT R3 100k CIN PG MP20045 FB EN CIN R1 PG COUT 2.2 VOUT MP20045 FB R2 EN VOUT =1.5 × (1+ Fixed Version MP20045 Rev. 1.0 10/13/2010 C3(Optional) 0.1nF COUT 2.2 R1 )Volts R2 Adjustable Version www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 1 MP20045 – LOWER NOISE, 1A LINEAR REGULATOR ORDERING INFORMATION Part Number* MP20045DQ** MP20045DQ-15** MP20045DQ-18** MP20045DQ-25** MP20045DQ-33** MP20045DN** MP20045DN-15** MP20045DN-18** MP20045DN-25** MP20045DN-33** Output Voltage Adjustable 1.5V 1.8V 2.5V 3.3V Adjustable 1.5V 1.8V 2.5V 3.3V Package QFN8 (3mm x 3mm) QFN8 (3mm x 3mm) QFN8 (3mm x 3mm) QFN8 (3mm x 3mm) QFN8 (3mm x 3mm) SOIC8E SOIC8E SOIC8E SOIC8E SOIC8E Top Marking 8K 2V 3V 9Z 2S M20045DN 20045-15 20045-18 20045-25 20045-33 Free Air Temperature (TA) -40°C to +85°C * For fixed output voltage versions between 1.5V and 5V, add suffix –XX (e.g. MP20045DQ-33, MP20045DN-33 are the 3.3V fixed output). Contact factory for availability. ** For Tape & Reel, add suffix –Z (e.g. MP20045DQ–Z, MP20045DN–Z); For RoHS compliant packaging, add suffix –LF (e.g. MP20045DQ–LF–Z, MP20045DN–LF–Z). PACKAGE REFERENCE TOP VIEW TOP VIEW VIN 1 8 EN VIN 2 7 PG VOUT 3 6 GND VOUT 4 5 VOUT 1 8 VIN VOUT 2 7 VIN FB 3 6 EN GND 4 5 PG FB EXPOSED PAD ON BACKSIDE CONNECT TO GND QFN8 (3mm x 3mm) MP20045 Rev. 1.0 10/13/2010 SOIC8E www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 2 MP20045 – LOWER NOISE, 1A LINEAR REGULATOR ABSOLUTE MAXIMUM RATINGS (1) VIN, EN, PG, FB to GND ................-0.3V to +6V OUT to GND .........................-0.5V to VIN + 0.5V (2) Continuous Power Dissipation (TA=+25°C) QFN8 (3x3) ......................................................2.0W SOIC8E ............................................................2.0W Free Air Temperature (TA).............. -40°C to 85°C Storage Temperature Range ..... -65°C to 150°C Lead Temperature (Soldering, 10sec)...........260°C ESD Susceptibility HBM (Human Body Mode)........................... 2kV MM (Machine Mode) .................................. 200V Recommended Operating Conditions Thermal Resistance (4) θJA θJC QFN8 (3x3) .............................50 ...... 12 ... °C/W SOIC8E ...................................50 ...... 10 ... °C/W 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. (3) Supply Input Voltage.......................2.5V to 5.5V Enable Input Voltage .........................0V to 5.5V Operating Junct. Temp (TJ)...... -40°C to +125°C MP20045 Rev. 1.0 10/13/2010 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 3 MP20045 – LOWER NOISE, 1A LINEAR REGULATOR ELECTRICAL CHARACTERISTICS VIN=VOUT+0.5V or VIN=2.5V, EN=VIN, Typical values are at TA=+25°C, unless otherwise specified Parameter Input Voltage Input Under voltage Lockout Hysteresis of UVLO FB Accuracy Adjustable 1.5V Output Voltage 1.8V Accuracy 2.5V 3.3V Maximum Output Current Short-Circuit Current Limit Condition VIN rising Min 2.5 2.0 Typ Max 5.5 2.3 160 PSRR IOUT=1mA IOUT=1mA, 2.5V<VIN<5.5V IOUT=1mA, 2.5V<VIN<5.5V IOUT=1mA, 3V<VIN<5.5V IOUT=1mA, 3.8V<VIN<5.5V Continuous, VIN>=3V VOUT=0, VIN>=3V VOUT within 4% of normal output voltage VIN=5.5V IOUT=100µA IOUT=1A VIN from VOUT+0.5V to 5.5V, IOUT=5mA IOUT from 1mA to 1A VIN=3.3V, VOUT=2.8V, COUT=2.2µF, IOUT=100mA, f ranges from 10Hz to 100kHz At 1kHz, IOUT=250mA Shutdown Supply Current VIN=+5.5V EN PIN Threshold EN Logic High EN Logic Low In-Regulation Current Limit Ground Current Dropout Voltage(5) Line Regulation(6) Load Regulation(7) Output Voltage Noise EN pin PULL-UP resistor Thermal Shutdown Temperature Minimum input voltage Trip threshold voltage -2.5 -2.5 -2.5 -2.5 -2.5 1 1.4 PG Hysteresis voltage Output low voltage Leakage current 2.2 % A A 1.6 3.0 A 280 0.15 -0.3 µA mV %/V % 13 µVRMS 56 dB 110 140 -0.15 5 16 1.5 0.4 550k Typical thermal hysteresis =20°C IOUT(PG)=300µA MP20045 MP20045-15 MP20045-18 VOUT decreasing MP20045-25 MP20045-33 Measured at VOUT IOUT(PG)=1mA V(PG)=5.5V 2.5 2.5 2.5 2.5 2.5 Units V V mV 1.1M 150 1.1 80 1.3 86 77 µA V Ω °C V %VOUT 83 6 0.15 0.4 1 %VOUT V µA Notes: 5) Dropout Voltage is defined as the input to output differential when the output voltage drops 100mV below its nominal value. VOUT ⎡ V 6) Line Regulation= ⎣ ⎤ IN(MAX ) ⎦ − VOUT ⎡ V ⎣ ⎤ IN(MIN) ⎦ ⎡V − VIN(MIN) ⎤ × VOUT(NOM) ⎣ IN(MAX ) ⎦ 7) Load Regulation= VOUT ⎡I ⎤ ⎣ OUT (MAX ) ⎦ − VOUT ⎡I VOUT (NOM) MP20045 Rev. 1.0 10/13/2010 ⎤ ⎣ OUT(MIN) ⎦ × 100(% / V) × 100(%) www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 4 MP20045 – LOWER NOISE, 1A LINEAR REGULATOR PIN DESCRIPTION QFN8 (3X3) Pin # SOIC8E Pin # Name 1, 2 7, 8 VIN Regulator Input. Supply voltage ranges from +2.5V to 5.5V. Bypass with 2.2µF capacitor. These pins must be externally connected for proper operation even if they are internally connected. 3, 4 1, 2 VOUT Regulator output. Bypass with a 2.2µF low-ESR capacitor to GND. Connect all the pin together externally. Description 5 3 FB Feedback Input. For the adjustable output version, connect FB to the center point of the external resistor divider. The feedback threshold voltage is 1.5V. For the fixed output version, connect FB to the output directly. 6 4 GND Expose d pad Ground. Connect exposed pad to GND plane for optimal thermal performance. 7 5 PG Open-drain power-good (PG) output. 8 6 EN Positive polarity enable (EN) input. Regulator Enable Control Input. Drive EN above 1.5V to turn on the MP20045. Drive EN below 0.4V to turn it off. Do not float the EN pin. MP20045 Rev. 1.0 10/13/2010 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 5 MP20045 – LOWER NOISE, 1A LINEAR REGULATOR TYPICAL PERFORMANCE CHARACTERISTICS VIN=3.3V, VOUT=2.8V, CIN=COUT=2.2µF, TA=25°C, unless otherwise noted Quiescent Current vs. Temperature Quiescent Current vs. Input Voltage 120 60 40 20 0 -40 -20 0 20 40 60 160 100 DR OPOUT V OL T A G E (mV ) QUI E SC E NT C UR R E NT (uA ) 80 80 60 40 20 0 80 100 3 Dropout Voltage vs. Output Current 3.5 4 4.5 5 5.5 I NPUT V OL T A G E (V ) EN threshold vs. Input Voltage EN high threshold 0.8 0.7 60 40 0.6 20 0.5 0 200 400 600 800 EN low threshold 2.5 2 2 C UR R E NT L I M I T (A ) 2.5 1 0.5 0 -40 -20 0 20 40 60 3.5 4 4.5 5 I NPUT V OL T A G E (V ) 80 100 0 -40 -20 20 40 60 80 100 EN threshold vs. Temperature EN high threshold 0.6 0.5 EN low threshold 0.4 1.5 1 0.5 0 3 3.5 4 4.5 5 5.5 0 20 40 60 80 100 Line Regulation 0.3 0.2 IOUT=0.5A 0.1 0.0 IOUT=0A -0.1 -0.2 -0.3 3.0 3.5 INPUT VOLTAGE (V) MP20045 Rev. 1.0 10/13/2010 0 0 -40 -20 5.5 Current Limit vs. Input Voltage 1.5 IOUT=1A 20 0.1 3 Current Limit vs. Temperature 40 0.2 0.4 1000 60 0.3 OUT PUT V OL T A G E A C C UR A C Y (% ) 0 80 0.7 VEN(V) VEN(V) 80 100 0.8 0.9 100 120 0.9 1 120 140 1 1.1 140 C UR R E NT L I M I T (A ) 180 120 100 160 Dropout Voltage vs. Temperature www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 4.0 4.5 5.0 5.5 INPUT VOLTAGE (V) 6 MP20045 – LOWER NOISE, 1A LINEAR REGULATOR TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN=3.3V, VOUT=2.8V, CIN=COUT=2.2µF, TA=25°C, unless otherwise noted Load Regulation Output Voltage Accuracy vs. Temperature 0.06 0.8 PSRR Vs. Frequency IOUT=800mA, f ranges from 10Hz to 1MHz IOUT=250mA, 100 90 0.6 0.04 80 0.4 0.02 70 0.00 PSRR (dB) 0.2 0.0 -0.2 -0.02 -0.4 -0.04 -0.06 0 200 400 600 800 1000 -0.8 -40 -20 0 20 40 60 50 40 30 20 IOUT =1A -0.6 60 10 80 100 0 10 OUTPUT CURRENT (mA) 10 2 104 103 105 FREQUENCY (Hz) 106 Region of Stable COUT ESR vs. Output Current 100 10 Unstable Range 1 Stable Range 0.1 0 200 400 600 800 1000 OUTPUT CURRENT (mA) MP20045 Rev. 1.0 10/13/2010 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 7 MP20045 – LOWER NOISE, 1A LINEAR REGULATOR TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN=3.3V, VOUT=2.8V, CIN=COUT=2.2µF, TA=25°C, unless otherwise noted Input Power Start Up Input Power Shutdown EN Start Up IOUT=1A, with Resistor Load IOUT=1A, with Resistor Load IOUT=1A, with Resistor Load VIN 2V/div VIN 2V/div VOUT 2V/div VOUT 2V/div IOUT 500mA/div IOUT 500mA/div 2ms/div VEN 5V/div VOUT 1V/div IOUT 500mA/div 40us/div 100ms/div EN Shutdown Line Transient Line Transient IOUT=1A, with Resistor Load VIN=3.3V to 4.3V, IOUT=100mA, with Resistor Load VIN=3.3V to 4.3V, IOUT=1A, with Resistor Load VEN 5V/div VOUT (AC) 10mV/div VIN 1V/div VOUT (AC) 10mV/div VIN 1V/div VOUT 1V/div IOUT 500mA/div 4us/div 400us/div Load Transient Over Current Protection Entry Power Good Status IOUT=50mA to 1A, with Resistor Load VOUT (AC) 50mV/div VIN 2V/div VOUT 2V/div IOUT 500mA/div 100us/div MP20045 Rev. 1.0 10/13/2010 400us/div PG 1V/div VOUT 500mV/div IOUT 500mA/div 40us/div www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 400ms/div 8 MP20045 – LOWER NOISE, 1A LINEAR REGULATOR TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN=3.3V, VOUT=2.8V, CIN=COUT=2.2µF, TA=25°C, unless otherwise noted Over Current Protection Recovery Over Current Protection Steady State No Load No Load VIN 2V/div VOUT 2V/div VIN 2V/div VOUT 2V/div IOUT 500mA/div IOUT 500mA/div 20ms/div MP20045 Rev. 1.0 10/13/2010 Current Limit IOUT 500mA/div 40ms/div www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 4ms/div 9 MP20045 – LOWER NOISE, 1A LINEAR REGULATOR BLOCK DIAGRA Figure 1—Block Diagram of Super Low Dropout Regulation OPERATION The MP20045 is a low-dropout linear regulator supplies up to 1A current. It is intended for use in devices that require very low voltage, low quiescent, low noise and high PSRR such as wireless LAN, battery powered equipment and hand-held equipment. The MP20045 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 MP20045 is very low. Shutdown The MP20045 can be switched ON or OFF by a logic input at the EN pin. A high voltage at this pin will turn the device on. When the EN pin is low, the regulator output is off. The EN pin should be tied to VIN to keep the regulator output always on if the application does not require the shutdown feature. Do not float the EN pin. MP20045 Rev. 1.0 10/13/2010 Current Limit The MP20045 includes a current limit structures which monitor and control PMOS’s gate voltage limiting the guaranteed maximum output current to 1.2A. 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 MP20045. 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 MP20045, the DC shift is very small. 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. 10 MP20045 – LOWER NOISE, 1A LINEAR REGULATOR APPLICATION INFORMATION Setting the Output Voltage The output voltage of MP20045 can be set externally which ranges from 1.5V to 5V by operating from +2.5V to +5.5V input or preset internally at 1.5V, 1.8V, 2.5V, 3.3V, 5V. For the adjustable version, the output voltage is set by using a resistive voltage divider from the output voltage to FB pin. The voltage divider divides the output voltage down to the feedback voltage by the ratio: 100 R2 R1 + R2 Where VFB is the feedback threshold voltage (VFB = 1.5V), and VOUT is the output voltage. Thus the output voltage is: VOUT = 1.5 × R1+ R2 R2 R2 can be as high as 100kΩ, but a typical value is 10kΩ. Using that value, R1 is determined by: ⎛V − VFB R1 = R2 × ⎜⎜ OUT V FB ⎝ COUT ESR(Ω) VFB = VOUT Output Capacitor Selection The MP20045 is designed specifically to work with very low ESR ceramic output capacitor in space-saving and performance consideration. A 2.2µF ceramic capacitor with ESR lower than 0.9Ω is suitable for the MP20045 application circuit. Output capacitor of larger values will help to improve load transient response and reduce noise with the drawback of increased size. 10 1 0.1 0 100 200 300 400 500 600 700 800 900 1000 OUTPUT CURRENT(mA) ⎞ ⎟⎟ ⎠ For example, for a 2.8V output voltage, R2 is 10kΩ, and R1 is 8.66kΩ. You can select a standard 8.66kΩ (±1%) resistor for R1. Figure 2—Relationship between ESR and LDO Stability 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 MP20045 to ground using a large pad or ground plane helps to channel heat away. MP20045 Rev. 1.0 10/13/2010 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 11 MP20045 – LOWER NOISE, 1A LINEAR REGULATOR PACKAGE INFORMATION 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" 0.051(1.30) 0.067(1.70) SEATING PLANE 0.000(0.00) 0.006(0.15) 0.013(0.33) 0.020(0.51) 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) 0.138(3.51) RECOMMENDED LAND PATTERN MP20045 Rev. 1.0 10/13/2010 0.213(5.40) NOTE: 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. www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 12 MP20045 – LOWER NOISE, 1A LINEAR REGULATOR QFN8 (3mm×3mm) 2.90 3.10 0.30 0.50 PIN 1 ID MARKING 0.20 0.30 2.90 3.10 PIN 1 ID INDEX AREA 1.45 1.75 PIN 1 ID SEE DETAIL A 8 1 2.25 2.55 0.65 BSC 4 5 TOP VIEW BOTTOM VIEW PIN 1 ID OPTION A 0.30x45º 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 VEEC-2. 5) DRAWING IS NOT TO SCALE. 1.70 0.25 2.50 0.65 RECOMMENDED LAND PATTERN 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. MP20045 Rev. 1.0 10/13/2010 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 13