MP2386GG-P

MP2386 24V, 8A, Low IQ, Synchronous Buck Converter DESCRIPTION FEATURES The MP2386 is a fully integrated, highfrequency, synchronous, rectified, step-down, switch-mode converter. The MP2386 offers a super-compact solution that achieves 8A of continuous output current over a wide input supply range.        The MP2386 operates at high efficiency over a wide output current load range based on MPS’s proprietary switching loss reduction technique and internal low RDS(ON) power MOSFETs. Adaptive constant-on-time (COT) control provides fast transient response and eases loop stabilization. The DC auto-tune loop combined with the remote differential sense provides good load and line regulation. Full protection features include over-current protection (OCP), over-voltage protection (OVP), under-voltage protection (UVP), and thermal shutdown. The converter requires a minimal number of external components and is available in a QFN11 (2mmx2mm) package.         Wide 4.5V to 24V Operating Input Range 105μA Low Quiescent Current 8A Continuous Output Current Adaptive COT for Fast Transient DC Auto-Tune Loop Low RDS(ON) Internal Power MOSFETs Proprietary Switching Loss Reduction Technique Power Good (PG) Indication Fixed 700kHz Switching Frequency Stable with POSCAP and Ceramic Caps Internal Soft Start (SS) Output Discharge OCP, OVP, UVP, and Thermal Shutdown with Auto-Retry Available in a QFN-11 (2mmx2mm) Package The MPL-AL6050，MPL-AL4020 Inductor Series Matches Best Performance APPLICATIONS      Security Cameras Portable Devices, XDSL Devices Digital Set-Top Boxes Flat-Panel Televisions and Monitors General Purposes 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 VOUT = 1V, L = 0.68µH, DCR = 3.1mΩ 100 EFFICIENCY (%) 90 80 70 60 40 0.01 MP2386 Rev. 1.11 4/7/2020 Vin=5V Vin=12V Vin=19V 50 0.1 1 LOAD CURRENT (A) www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 10 1 MP2386 − 24V, 8A, SYNCHRONOUS BUCK CONVERTER ORDERING INFORMATION Part Number* MP2386GG Package QFN-11 (2mmx2mm) Top Marking See Below MSL Rating 1 * For Tape & Reel, add suffix –Z (e.g.: MP2386GG–Z). TOP MARKING HT: Product code of MP2386GG Y: Year code LLL: Lot number PACKAGE REFERENCE TOP VIEW EN FB 11 10 VIN AGND 9 VCC 8 1 7 6 2 3 PGND 4 PGND PGND BST SW 5 PG QFN-11 (2mmx2mm) MP2386 Rev. 1.11 4/7/2020 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 2 MP2386 − 24V, 8A, SYNCHRONOUS BUCK CONVERTER PIN FUNCTIONS PIN # Name 1 VIN 2-4 5 PGND PG 6 SW 7 BST 8 VCC 9 AGND 10 FB 11 EN Description Supply voltage. VIN supplies power to the internal MOSFET and regulator. The MP2386 operates from a +4.5V to +24V input rail. An input capacitor is needed to decouple the input rail. Connect VIN with wide PCB traces and multiple vias. Apply at least two layers to this input trace. Power ground. Connect PGND with wide PCB traces and multiple vias. Power good output. The output of PG is an open drain. Switch output. Connect SW to the inductor and bootstrap capacitor. SW is driven up to VIN by the high-side switch during the on time of the PWM duty cycle. The inductor current drives SW negative during the off time. The on resistance of the low-side switch and the internal diode fixes the negative voltage. Connect SW with wide and short PCB traces. Bootstrap. Connect a capacitor between SW and BST to form a floating supply across the high-side switch driver. Internal VCC LDO output. VCC powers the driver and control circuits. Decouple VCC with a minimum 1µF ceramic capacitor as close to VCC as possible. X7R or X5R grade dielectric ceramic capacitors are recommended for their stable temperature characteristics. Signal logic ground. AGND is the Kelvin connection to PGND. Feedback. An external resistor divider from the output to GND tapped to FB sets the output voltage. Place the resistor divider as close to FB as possible. Avoid vias on the FB traces and VSEN trace. Keep the VSEN trace far away from the SW node. Buck enable. EN is a digital input that turns the buck regulator on or off. When the power supply of the control circuit is ready, drive EN high to turn on the buck regulator. Drive EN low to turn off the buck regulator. Connect EN to VIN through a resistive voltage divider for automatic start-up. Do not make the EN voltage higher than 4.5V at any time. Do not float EN. ABSOLUTE MAXIMUM RATINGS (1) Supply voltage (VIN) ...................................... 26V VSW (DC)................................... -1V to VIN + 0.3V VSW (transient) ................................ -9V for