NCP3284AMNTXG

DATA SHEET www.onsemi.com Single-Phase Voltage Regulator MARKING DIAGRAM High Efficiency, Integrated Power MOSFETs NCP3284, NCP3284A PQFN37 5x6, 0.5P CASE 483BZ The NCP3284/A, a single−phase synchronous buck regulator, integrates power MOSFETs to provide a high−efficiency and compact−footprint power management solution. The NCP3284 is able to deliver up to 30 A TDC output current, 35 A TDC for NCP3284A, over a wide input and output operating voltage range. Operating in high switching frequency up to 1 MHz allows employing small size inductors and capacitors while maintaining high efficiency due to integrated solution with high performance power MOSFETs. It provides differential voltage sense, flexible soft−start programming, and comprehensive protections. MODE /FSET HICCUP# NC NC AGND VSNS- FB SS PINOUT 36 35 34 33 32 31 30 29 ILIM 1 28 VOS PGOOD 2 27 EN VIN 3 26 BOOT VCC 4 25 PHASE VDRV 5 24 PVIN 23 PVIN GL PGND PVIN GL 6 PVIN PGND 9 20 PVIN PGND 10 19 PGND 12 13 14 SW 11 15 16 17 18 SW PVIN 21 SW 22 8 SW 7 PGND SW PGND SW • • • • • • • • • = Assembly Site = Wafer Lot Number = Year of Production = Work Week Number = Pb−Free Designator SW • • • VIN = 4.5 V ~ 18 V with Input Feedforward VOUT = 0.8 V ~ 5.5 V with Remote Voltage Sense Fsw = 500k/600k/800k/1 MHz Switching Frequency Output Current: NCP3284 up to 30 A Continuous, 45 A Pulsed Output Current: NCP3284A up to 35 A Continuous, 50 A Pulsed Integrated 5 V LDO or External 5 V Supply Enable with Programmable VIN UVLO Selectable Forced CCM and Auto DCM/CCM for High Efficiency at Light Load Programmable Soft Start Output Discharge in Shutdown Programmable Current Limit Under−Voltage Protection and Over−Voltage Protection Recoverable Thermal Shutdown Protection Selectable Protection Mode (Latch−off or Hiccup) Power Good Indicator PQFN37, 5x6 mm, 0.5 mm Pitch Package This Device is Pb−Free and is RoHS Compliant A WL Y WW G SW Features • • • • NCP3284x AWLYWWG (Top View) ORDERING INFORMATION See detailed ordering and shipping information on page 11 of this data sheet. Typical Applications • • • • Point of Load Telecom and Networking Server and Storage System Computing Applications © Semiconductor Components Industries, LLC, 2019 August, 2021 − Rev. 8 1 Publication Order Number: NCP3284/D NCP3284, NCP3284A VIN PVIN VIN PGND VDRV BOOT PHASE VOUT VCC NCP3284/A AGND PGOOD SW FB VSNS − EN VOS SS MODE/ FSET ILIM Figure 1. Typical Application Circuit with Single Input Power Supply (LDO Enabled) +5V PVIN VIN VIN PGND VDRV BOOT PHASE VOUT VCC NCP3284/A AGND PGOOD SW FB VSNS − EN VOS SS MODE/ FSET ILIM Figure 2. Typical Application Circuit with External 5 V Supply for VCC (LDO Disabled) www.onsemi.com 2 NCP3284, NCP3284A BOOT VIN PHASE MOSFETs VDRV VDRV PVIN 5V LDO SW Gate Drive VDRV GL Vref VCC EN Control Logic & Protections & VR Ready PGOOD PGND Gate Driver FB PWM EN_INT Soft Start Vref HICC UP# PWM Control FB COMP VSNS − VIN AGND MODE /FSET SS Programming Detection Controller ILIM Figure 3. Functional Block Diagram www.onsemi.com 3 VOS NCP3284, NCP3284A PIN DESCRIPTION Pin Name Type Description 1 ILIM Analog Output 2 PGOOD Logic Output Power Good. Open−drain output. Provides a logic high valid power good output signal, indicating the regulator’s output is in regulation window. 3 VIN Power Input Power Supply Input of LDO. Power supply input pin of internal 5 V LDO. A 1.0 mF or more ceramic capacitor must bypass this input to power ground. The capacitor should be placed as close as possible to this pin. A direct short from this pin to VDRV (pin 5) disables the internal LDO for applications with an external 5 V supply as power of VDRV and VCC. 4 VCC Analog Power Supply Voltage Input of Controller. A 2.2 mF or larger ceramic capacitor bypasses this input to GND. This capacitor should be placed as close as possible to this pin. 5 VDRV Analog Power Output of LDO and Supply Voltage Input of Gate Drivers. Output of integrated 5.0 V LDO and power supply input of gate drivers. A 4.7 mF/25 V or larger ceramic capacitor bypasses this pin to PGND. The capacitor should be placed as close as possible to this pin. 6 GL Analog Output Gate of Low−Side MOSFET. Internally connected to the gate of the low−side power MOSFET. No external connection required. 7~10,19 PGND Power Ground Power Ground. These pins are the power supply ground pins of the device, which are connected to source of internal low−side power MOSFET. Must be connected to the system ground. 11~18 SW Power Bidirectional Switch Node. Pins to be connected to an external inductor. These pins are interconnection between internal high−side MOSFET and low−side MOSFET. 20~24 PVIN Power Input Power Supply Input. These pins are the power supply input pins of the device, which are connected to drain of internal high−side power MOSFET. A 22 mF or more ceramic capacitor must bypass this input to PGND. The capacitors should be placed as close as possible to these pins. 25 PHASE Power Return 26 BOOT Power Bidirectional Bootstrap. Provides bootstrap voltage for high−side gate driver. A 0.22 mF/25 V ceramic capacitor is required from this pin to PHASE (pin 25). 27 EN Logic Input Enable. Logic high enables controller while logic low disables controller. Input supply UVLO can be programmed at this pin. 28 VOS Analog Input Voltage Sense. Remote output voltage sense. Connect to VOUT through 1 kW series resistor. 29 SS Analog Input Soft Start. A resistor between this pin and GND to program the soft−start slew rate and options. 30 FB Analog Input Feedback. Inverting input to error amplifier. 31 VSNS− Analog Input Voltage Sense Negative Input. Connect this pin to remote voltage negative sense point. 32 AGND Analog Ground 33~34 NC − 35 HICCUP# Analog Input Latch−Off / Hiccup#. Float this pin to enable latch−off mode protections (OCP/ UVP/OVP); Ground this pin to ground to enable hiccup mode protections. 36 MODE/FSET Analog Input Mode and Frequency Set. A resistor between this pin and AGND to program operation mode and nominal switching frequency. Current Limit. A resistor between this pin and AGND to program current limit. Phase Node. Provides a return path for integrated high−side gate driver. It is internally connected to source of high−side MOSFET. Analog Ground. Ground of controller. Must be connected to the system ground. No Connection. www.onsemi.com 4 NCP3284, NCP3284A MAXIMUM RATINGS Value Rating Power Supply Voltage to PGND Symbol MIN VPVIN, VVIN MAX Unit 25 V PHASE/SW to PGND VPHASE, VSW −0.6 −5 (