MPQ4418AGJ-AEC1-Z

MPQ4418A 0.6A, 36V, High-Efficiency, Low-RDS(ON), Synchronous Step-Down Converter, AEC-Q100 Qualified DESCRIPTION FEATURES The MPQ4418A is a high-efficiency, synchronous, rectified, switch-mode, step-down converter with built-in internal power MOSFETs. It can achieve up to 0.6A of continuous output current (IOUT) across a wide input voltage (VIN) range (4V to 36V), with excellent load and line regulation. • Synchronous mode offers high efficiency across the entire IOUT range. Current control mode provides fast transient response and improves loop stabilization. Full protection features include over-current protection (OCP) and thermal shutdown. The MPQ4418A offers a compact solution that requires a minimal number of readily available, standard, external components, and is available in a small TSOT23-8 package. • • • • • • • • • • • • • Wide 4V to 36V Operating Input Voltage (VIN) Range Configurable Output Voltage (VOUT) from 0.8V Internal Low-RDS(ON) 90mΩ High-Side MOSFET (HS-FET) and 55mΩ Low-Side MOSFET (LS-FET) High-Efficiency Synchronous Mode Operation 410kHz Default Switching Frequency (fSW) 200kHz to 2.2MHz Synchronized External Clock High Duty Cycle for Automotive Cold Crank Forced Continuous Conduction Mode (FCCM) Internal Soft Start (SS) Power Good (PG) Over-Current Protection (OCP) with Hiccup Mode Thermal Shutdown Available in a TSOT23-8 Package Available in AEC-Q100 Grade 1 APPLICATIONS • • • Automotive Industrial Control Systems Distributed Power Systems All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For MPS green status, please visit the MPS website under Quality Assurance. “MPS”, the MPS logo, and “Simple, Easy Solutions” are trademarks of Monolithic Power Systems, Inc. or its subsidiaries. TYPICAL APPLICATION Efficiency vs. Load Current 4V to 36V VOUT = 3.3V BST 100 IN VIN SW EN/SYNC VEN/SYNC PG FB EFFICIENCY (%) VOUT MPQ4418A 90 Vin=12V 80 Vin=24V 70 Vin=36V 60 50 40 30 20 VCC GND 10 0 1 10 100 LOAD CURRENT (mA) MPQ4418A Rev. 1.0 MonolithicPower.com 11/9/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 600 1 MPQ4418A – 0.6A, 36V, SYNC STEP-DOWN CONVERTER, AEC-Q100 ORDERING INFORMATION Part Number* MPQ4418AGJ-AEC1 Package TSOT23-8 Top Marking See Below MSL Rating** 1 * For Tape & Reel, add suffix -Z (e.g. MPQ4418AGJ-AEC1-Z). ** Moisture Sensitivity Level Rating TOP MARKING BVM: Product code Y: Year code PACKAGE REFERENCE TOP VIEW TSOT23-8 MPQ4418A Rev. 1.0 MonolithicPower.com 11/9/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 2 MPQ4418A – 0.6A, 36V, SYNC STEP-DOWN CONVERTER, AEC-Q100 PIN FUNCTIONS Pin # 1 2 3 4 5 6 7 8 Name Description Power good (PG) output. The PG pin is an open-drain output. If the output voltage (VOUT) exceeds 90% of the nominal voltage, this pin is pulled high. Supply voltage. The MPQ4418A operates from a 4V to 36V input rail. An input capacitor IN (C1) is required to decouple the input rail. To minimize switching spikes, connect C1 to GND to decouple the input rail. Place C1 as close to IN as possible. SW Switch output. The SW pin is the internal power switch’s output. Reference system ground. The GND pin is critical to successful PCB layout. GND is the GND reference ground of the regulated VOUT; connect the GND pin to system ground using copper traces and vias. Bootstrap. Connect a capacitor between SW and BST to form a floating supply across the BST high-side MOSFET (HS-FET) driver. To reduce SW voltage spikes, it is recommended to place a 20Ω resistor between SW and BST. Enable/synchronous. To turn on the MPQ4418A, pull the EN/SYNC pin high. To configure EN/SYNC the switching frequency (fSW), apply an external clock to EN/SYNC. Bias supply. Decouple VCC with a 0.1μF to 0.22μF capacitor, which must not exceed VCC 0.22μF. Feedback. To set VOUT, connect FB to the tap of an external resistor divider between the output and GND. When the FB voltage (VFB) drops below 660mV, the frequency foldback FB comparator decreases the oscillator frequency to prevent current limit runaway during a short-circuit fault. PG θJA θJC ABSOLUTE MAXIMUM RATINGS (1) Thermal Resistance (4) Continuous supply voltage (VIN).......................... ………………………………………-0.3V to +40V Switch voltage (VSW) .....................-0.3V to +41V BST voltage (VBST) ............................... VSW + 6V All other pins ............................... -0.3V to +6V (2) Continuous power dissipation (TA = 25°C) (3) TSOT23-8 ................................................ 1.25W Junction temperature ................................150°C Lead temperature .....................................260°C Storage temperature ................ -65°C to +150°C TSOT23-8 .............................. 100 ..... 55... °C/W ESD Ratings Human body model (HBM) .................... ±2000V Charged device model (CDM)..................±750V Recommended Operating Conditions Continuous supply voltage (VIN).......... 4V to 36V Output voltage (VOUT) ................ 0.8V to 0.9 x VIN Operating junction temp (TJ) .... -40°C to +125°C Notes: 1) Absolute maximum ratings are rated under room temperature, unless otherwise noted. Exceeding these ratings may damage the device. 2) For details on the EN pin’s absolute maximum rating, see the Enable/Synchronous (EN/SYNC) Control section on page 11. 3) 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 can cause excessive die temperature, which may cause the device to go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. 4) Measured on JESD51-7, 4-layer PCB. The values given in this table are only valid for comparison with other packages and cannot be used for design purposes. These values were calculated in accordance with JESD51-7, and simulated on a specified JEDEC board. They do not represent the performance obtained in an actual application. MPQ4418A Rev. 1.0 MonolithicPower.com 11/9/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 3 MPQ4418A – 0.6A, 36V, SYNC STEP-DOWN CONVERTER, AEC-Q100 ELECTRICAL CHARACTERISTICS VIN = 12V, TJ = -40°C to +125°C, typical values are at TJ = 25°C, unless otherwise noted. Parameter Symbol Shutdown supply current ISHDN Quiescent supply current IQ High-side (HS) on resistance Low-side (LS) on resistance Switch leakage Current limit Oscillator frequency Foldback frequency Maximum duty cycle Minimum on time (5) SYNC frequency range RON_HS RON_LS ILKG_SW ILIMIT fSW fFB DMAX tON_MIN fSYNC Feedback (FB) voltage VFB FB current Enable (EN) rising threshold EN falling threshold EN threshold hysteresis IFB EN input current VIN under-voltage lockout (UVLO) rising threshold VIN UVLO falling threshold VIN UVLO threshold hysteresis VCC regulator VCC load regulation Soft-start time Thermal shutdown (5) Thermal hysteresis (5) Power good (PG) rising threshold PG falling threshold PG threshold hysteresis PG rising deglitch time PG falling deglitch time PG sink current PG leakage current Condition VEN = 0V VEN = 2V, VFB = 1V, no switching VBST_SW = 5V VCC = 5V VEN = 0V, VSW = 12V