PWM Buck Regulator, Synchronous, Voltage Mode, High Performance, 65 V, 6 A FAN65004B www.onsemi.com Description FAN65004B is a wide VIN highly efficient synchronous buck regulator, with integrated high side and low side power MOSFETs. The device incorporates a fixed frequency voltage mode PWM controller supporting a wide voltage range from 4.5 V to 65 V and can handle continuous currents up to 6 A. PQFN35 6x6 FAN65004B includes a 0.67% accurate reference voltage to achieve CASE 483BE tight regulation. The switching frequency can be programmed from 100 kHz to 1 MHz. To improve efficiency at light load condition, the MARKING DIAGRAM device can be set to discontinuous conduction mode with pulse skipping operation. FAN65004B has dual LDOs to minimize power loss and integrated ZXYYKK current sense circuit that provides cyclebycycle current limiting. FAN This single phase buck regulator offers complete protection features 65004B including Over current protection, Thermal shutdown, Undervoltage 1 lockout, Over voltage protection, Under voltage protection and Short circuit protection. Z = Assembly Location FAN65004B uses ON Semiconductors high performance X = Year / Lead Free PowerTrench MOSFETs that reduces ringing in switching YY = Week applications. FAN65004B integrates the controller, driver, and power KK = Lot FAN65004B = Specific Device Code MOSFETs into a thermally enhanced, compact 6 x 6 mm PQFN package. With an integrated approach, the complete DC/DC converter is optimized from the controller and driver to MOSFET switching ORDERING INFORMATION performance, delivering a high power density solution. See detailed ordering and shipping information on page 23 of this data sheet. Features Wide Input Voltage Range: 4.5 V to 65 V Continuous Output Current: 6 A Fixed Frequency Voltage Mode PWM Control with Input Voltage High Performance Low Profile 6 mm x 6 mm PQFN Feedforward Package 0.6 V Reference Voltage with 0.67% Accuracy This Device is PbFree and RoHS Compliant Adjustable Switching Frequency: 100 kHz to 1 MHz Dual LDOs for Single Supply Operation and to Reduce Applications Power Loss High Voltage POL Module Selectable CCM PWM Mode or PFM Mode for Light Telecommunications: Base Station Power Supplies Loads Networking: Computing, Battery Management External Compensation for Wide Operation Range Systems, USBPD Adjustable SoftStart & PreBias Startup Industrial Equipment: Automation, Power Tools, Slot Enable Function with Adjustable Input Voltage Machines UnderVoltageLockOut (UVLO) Power Good Indicator Over Current Protection, Thermal Shutdown, Over Voltage Protection, Under Voltage Protection and Shortcircuit Protection Semiconductor Components Industries, LLC, 2017 1 Publication Order Number: November, 2019 Rev. 2 FAN65004B/DFAN65004B TYPICAL APPLICATION V IN RBOOT R2 C2 C3 C1 4.5 V~65 V VCC R3 EN / SYNC R5 UVLO PGOOD C4 PVCC EXTBIAS L R4 V O C5 SW VCC C7 R8 COMP MODE R9 C6 R10 SS C10 C9 C8 RT FB R6 R11 R7 Figure 1. Typical Application Table 1. APPLICATION DESIGN EXAMPLE C from Phase O L to be V C from C from C to be R11 R9 R8 C9 C7 C8 f margin RT O RIPPLE O O O CO ( F) () V (V) V (V) L ( H) used ( H) V ( F) V ( F) used R10 ( ) ( ) ( ) ( ) (F) (F) (F) (Hz) (=R6) ( ) IN O OS US 35 24 16.762 2.6 30.9 65.2 718.2 18.0k 69.4 35 28 12.444 2.2 22.7 83.5 613.4 22.6k 67.5 35 30 9.524 2.1 19.8 103.6 571.6 22.6k 67.5 48 24 26.667 2.6 30.9 30.9 718.2 48 28 25.926 2.2 22.7 31.4 613.4 22.00 75.2 28010 365 1.0k 2.7n 220n 470p 3.75E+04 48 30 25.000 2.1 19.8 32.3 571.6 60 24 32.000 2.6 30.9 20.8 718.2 60 28 33.185 2.2 22.7 19.9 613.4 60 30 33.333 2.1 19.8 19.8 571.6 NOTE: *Iout = 5 A, Fsw = 300 KHz www.onsemi.com 2 HVBIAS BOOT PWM Controller with Driver ILIM AGND PH PGND VIN