MPQ2459GJ-Z

MPQ2459 The Future of Analog IC Technology 0.5A, 55V, 480KHz, Step-Down Converter in a TSOT23-6 Package AEC-Q100 Qualified DESCRIPTION FEATURES The MPQ2459 is a monolithic, step-down, switch-mode converter with a built-in power MOSFET. It achieves a 0.5A peak output current over a wide input-supply range with excellent load and line regulation. Current mode operation provides a fast transient response and eases loop stabilization. Fault protections include cycle-by-cycle current limiting and thermal shutdown.  The MPQ2459 requires a minimal number of readily-available, standard, external components. The MPQ2459 is available in a TSOT23-6 package.             Guaranteed Industrial/Automotive Temp Range Limits. 0.5A Peak Output Current 1Ω Internal Power MOSFET Stable with Low-ESR Ceramic Output Capacitors Up to 90% Efficiency 0.1μA Shutdown Mode Fixed 480kHz Frequency Thermal Shutdown Cycle-by-Cycle Over-Current Protection Wide 4.5V-to-55V Input Operating Range Output Adjustable from 0.81V to 0.95×VIN Available in a TSOT23-6 Package Available in AEC-Q100 Grade 1 APPLICATIONS      Power Meters Distributed Power Systems Battery Chargers Pre-Regulators for Linear Regulators WLED Drivers All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Products, Quality Assurance page. “MPS” and “The Future of Analog IC Technology” are registered trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION 100 90 80 70 60 50 40 30 0.0 0.1 0.2 0.3 0.4 MPQ2459 Rev. 1.11 www.MonolithicPower.com 1/4/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 0.5 0.6 1 MPQ2459 –INDUSTRIAL GRADE, 55V, 480KHz, STEP-DOWN CONVERTER, AEC-Q100 QUALIFIED ORDERING INFORMATION Part Number Package Top Marking MPQ2459GJ* TSOT23-6 AEQ MPQ2459GJ-AEC1** TSOT23-6 AEQ * For Tape & Reel, add suffix –Z (eg. MPQ2459GJ–Z); ** For Tape & Reel, add suffix -Z (e.g. MPQ2459GJ-AEC1-Z). PACKAGE REFERENCE TOP VIEW BST 1 6 SW GND 2 5 IN FB 3 4 EN ABSOLUTE MAXIMUM RATINGS (1) Thermal Resistance Supply Voltage VIN ......................... −0.3V to 60V VSW ......................................... −0.3V to VIN+0.3V VBS ....................................................... VSW + 6V All Other Pins ................................. −0.3V to +6V Continuous Power Dissipation (TA = +25°C) (2) TSOT23-6 .............................................. 0.568W Junction Temperature ...............................150°C Lead Temperature ....................................260°C Storage Temperature .............. −65°C to +150°C TSOT23-6 .............................. 220 .... 110.. °C/W Recommended Operating Conditions (3) Supply Voltage VIN ........................... 4.5V to 55V Output Voltage VOUT ............... 0.81V to 0.95×VIN Operating Junction Temp. ...... −40°C to +125°C (4) θJA θJC Notes: 1) Absolute maximum are rated under room temperature unless otherwise noted. 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 function is not guaranteed outside of the recommended operating conditions. 4) Measured on JESD51-7, 4-layer PCB. MPQ2459 Rev. 1.11 www.MonolithicPower.com 1/4/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 2 MPQ2459 –INDUSTRIAL GRADE, 55V, 480KHz, STEP-DOWN CONVERTER, AEC-Q100 QUALIFIED ELECTRICAL CHARACTERISTICS VIN = 12V, TJ = −40°C to +125°C, unless otherwise noted. Typical values are at TJ=25°C. Parameters Symbol Condition Feedback Voltage VFB Feedback Current Switch-ON Resistance Switch Leakage IFB RDS(ON) ISW LKG Current Limit ILIM Oscillator Frequency Foldback Frequency Maximum Duty Cycle Minimum ON Time (5) Under-Voltage-Lockout Threshold, Rising Under-Voltage-Lockout Threshold, Falling Under-Voltage-Lockout Threshold, Hysteresis EN Threshold Rising EN Threshold Falling EN Input Hysteresis fSW fSW F DMAX τON VUVLO R VUVLO F TJ=25°C VFB = 0.85V Min Typ Max Units 0.796 0.800 0.812 0.812 0.828 0.824 0.1 2 1 1.5 1.6 600 V V μA Ω μA 1 VEN = 0V, VSW = 0V TJ=25°C VFB = 0.6V VFB = 0V VFB = 0.6V 1 0.9 360 90 2.9 2.65 VEN R VEN F VEN HYS IEN Supply Current, Shutdown Supply Current, Quiescent Thermal Shutdown (5) Thermal Shutdown Hysteresis(5) IS IQ TSD TSD HYS 3.7 3.45 250 VUVLO_HYS EN Input Current 1.25 1.25 480 150 93.5 100 3.3 3.05 1.1 0.9 VEN = 2V VEN = 0V VEN = 0V VEN = 2V, VFB = 1V 1.35 1.17 180 3.1 0.1 0.1 0.73 165 20 A kHz kHz % ns V V mV 1.6 1.3 5 1 1.0 0.92 V V mV μA μA mA °C °C Notes: 5) Guaranteed by design. MPQ2459 Rev. 1.11 www.MonolithicPower.com 1/4/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 3 MPQ2459 –INDUSTRIAL GRADE, 55V, 480KHz, STEP-DOWN CONVERTER, AEC-Q100 QUALIFIED TYPICAL CHARACTERISTICS VIN=12V, VOUT=5V, IOUT=0.5A, L=15μH, TA=25°C, unless otherwise noted. 80 180 60 120 40 60 20 0 0 -20 -60 -40 -120 -60 -80 100 1000 -180 10000 100000 1000000 80 60 1.3 1.1 60 20 0.9 0 0 -20 -60 -40 -120 0.5 -180 10000 100000 1000000 0.3 -60 -80 100 1000 0.7 5 15 25 35 45 55 65 Radiation EMI 80 70 60 EN 55022 Voltage on Mains QP 50 EN 55022 Voltage on Mains AV 40 30 20 10 0 120 40 Conduction EMI 150k 300 180 8001M 2M 3M 5M 810M 20M 30M 60 55 50 45 40 35 30 25 20 15 10 5 0 30M EN 55022 Electric Field Strength 3 m QP 5060 80100M 200 300 400500 800 1G MPQ2459 Rev. 1.11 www.MonolithicPower.com 1/4/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 4 MPQ2459 –INDUSTRIAL GRADE, 55V, 480KHz, STEP-DOWN CONVERTER, AEC-Q100 QUALIFIED TYPICAL PERFORMANCE CHARACTERISTICS VIN=12V, VOUT=5V, L=22μH, TA=25°C, unless otherwise noted. Efficiency vs. Load Load Regulation 100 90 80 70 60 50 40 30 0.0 0.2 0.4 0.6 0.8 1.0 Line Regulation IOUT=0.5A 2.0 1.6 1.2 0.8 0.4 0.0 -0.4 -0.8 -1.2 -1.6 -2.0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 LOAD CURRENT ( A ) 2.0 1.6 1.2 0.8 0.4 0.0 -0.4 -0.8 -1.2 -1.6 -2.0 6 16 26 36 46 56 INPUT VOLTAG ( V ) LOAD CURRENT ( A ) Load Regulation 90 80 70 60 50 40 30 0.0 0.2 0.4 0.6 0.8 1.0 2.0 1.6 1.2 0.8 0.4 0.0 -0.4 -0.8 -1.2 -1.6 -2.0 LINE REGULATION ( % ) VOUT=3.3V 100 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 LOAD CURRENT ( A ) 2.0 1.6 1.2 0.8 0.4 0.0 -0.4 -0.8 -1.2 -1.6 -2.0 6 600 850 1.7 560 830 1.4 520 810 1.1 480 790 0.8 440 770 20 50 80 110 140 400 -40 -10 20 50 80 110 140 26 36 46 56 INPUT VOLTAG ( V ) 2.0 0.5 -40 -10 16 LOAD CURRENT ( A ) 750 -40 -10 20 50 MPQ2459 Rev. 1.11 www.MonolithicPower.com 1/4/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 80 110 140 5 MPQ2459 –INDUSTRIAL GRADE, 55V, 480KHz, STEP-DOWN CONVERTER, AEC-Q100 QUALIFIED TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN=12V, VOUT=5V, L=22μH, TA=25°C, unless otherwise noted. Steady State Steady State VIN=8V, IOUT=0.8A Load Transient IOUT=0.15A VIN 5V/div. VIN 10V/div. VSW 5V/div. VSW 10V/div. VOUT 5V/div. VOUT 5V/div. IL 500mA/div. IL 1A/div. IOUT=0.2A to 0.7A VIN 10V/div. VSW 10V/div. VOUT 200mV/div. IL 500mA/div. Steady State Steady State Load Transient VIN=6V, VOUT=3.3V, IOUT=0.1A VIN=60V, VOUT=3.3V, IOUT=0.9A VOUT=3.3V, IOUT=0.2A to 0.7A VIN 5V/div. VIN 50V/div. VSW 5V/div. VSW 50V/div. VOUT 2V/div. IL 200mA/div. VOUT 2V/div. VIN 10V/div. VSW 10V/div. VOUT 200mV/div. IL 500mA/div. IL 1A/div. Power Ramp Up Power Ramp Down Short Output VIN=60V, IOUT=0.5A VIN=60V, IOUT=0.5A IOUT=0.65A VIN 50V/div. VIN 50V/div. VSW 50V/div. VSW 50V/div. VOUT 5V/div. VOUT 5V/div. IOUT 500mA/div. IOUT 500mA/div. VIN 10V/div. VSW 10V/div. VOUT 5V/div. IL 1A/div. MPQ2459 Rev. 1.11 www.MonolithicPower.com 1/4/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 6 MPQ2459 –INDUSTRIAL GRADE, 55V, 480KHz, STEP-DOWN CONVERTER, AEC-Q100 QUALIFIED TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN=12V, VOUT=5V, L=22μH, TA=25°C, unless otherwise noted. Enable On Enable Off IOUT=0.5A Short Output Recovery IOUT=0.5A IOUT=0.65A VEN 2V/div. VEN 2V/div. VIN 10V/div. VSW 10V/div. VSW 10V/div. VSW 10V/div. VOUT 5V/div. VOUT 5V/div. VOUT 5V/div. IL 500mA/div. IL 500mA/div. IL 1A/div. MPQ2459 Rev. 1.11 www.MonolithicPower.com 1/4/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 7 MPQ2459 –INDUSTRIAL GRADE, 55V, 480KHz, STEP-DOWN CONVERTER, AEC-Q100 QUALIFIED PIN FUNCTIONS Pin # Name Description 1 BST 2 GND 3 FB 4 EN 5 IN 6 SW Bootstrap. Connect a capacitor between SW and BST to form a floating supply across the power-switch driver. This capacitor drives the power switch’s gate above the supply voltage. Ground. Voltage reference for the regulated, output voltage. Requires special layout considerations. Place this node outside of the D1-to-C1 ground path to prevent currentswitching spikes from introducing voltage noise. Feedback. Sets the output voltage through an external resistor divider from the output to GND. To prevent current-limit runaway during a short-circuit fault, the frequency foldback comparator lowers the oscillator frequency when VFB is below 250mV. ON/OFF Control. Pull EN above 1.2V to turn the device ON. For automatic enable, connect a 100kΩ resistor between this pin and IN. Supply Voltage. The MPQ2459 operates from a 4.5V-to-55V unregulated input. Requires C1 to prevent large voltage spikes from appearing at the input. Switch Output. MPQ2459 Rev. 1.11 www.MonolithicPower.com 1/4/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 8 MPQ2459 –INDUSTRIAL GRADE, 55V, 480KHz, STEP-DOWN CONVERTER, AEC-Q100 QUALIFIED OPERATION The MPQ2459 is a current-mode buck regulator — the EA output voltage is proportional to the peak-inductor current. At the beginning of a cycle, M1 is OFF. The EA output voltage exceeds the current-senseamplifier output, and the current comparator’s output is LOW. The rising edge of the 480kHz CLK signal sets the RS flip-flop. The flip-flip’s output turns on M1 to connect the SW pin and inductor to the input supply. The current-sense amplifier senses and amplifies the rising inductor current. The PWM comparator takes the sum of the current-sense amplifier’s output and the ramp compensator and the error amplifier output as its inputs. When the sum of the current sense amplifier’s output and the ramp-compensation signal exceeds the EA output voltage, the RS flip-flop resets and M1 turns OFF. The external Schottky rectifier diode (D1) conducts the inductor current. If the sum of the current sense amplifier’s output and the slope compensation signal does not exceed the EA output for a whole cycle, then the falling edge of the CLK resets the flipflop. The EA output integrates the voltage difference between the feedback and the 0.81V bandgap reference. When VFB