3 MHz, 2 A Fixed-Frequency Synchronous Buck Converter High Efficiency, Low Ripple, Adjustable Output Voltage www.onsemi.com NCP6354 The NCP6354, a synchronous buck converter, which is optimized to MARKING supply the different sub systems of portable applications powered by DIAGRAM one cell Liion or three cell Alkaline/NiCd/NiMH batteries. The 1 1 device is able to deliver up to 2 A on an external adjustable voltage. WDFN8 A2M Operation with 3 MHz switching frequency allows employing small CASE 511BE size inductor and capacitors. Input supply voltage feedforward control is employed to deal with wide input voltage range. Synchronous A2 = Specific Device Code rectification offers improved system efficiency. The NCP6354 is in a M = Date Code space saving, low profile 2.0x2.0x0.75 mm WDFN8 package. = PbFree Package (Note: Microdot may be in either location) Features 2.3 V to 5.5 V Input Voltage Range External Adjustable Voltage BLOCK DIAGRAM Up to 2 A Output Current 3 MHz Switching Frequency PGND 1 PVIN 8 Synchronous Rectification Enable Input SW 2 AVIN 7 Power Good Output 9 Soft Start 3 AGND PG 6 Over Current Protection Active Discharge when Disabled 4 FB 5 EN Thermal Shutdown Protection WDFN8, 2x2 mm, 0.5 mm Pitch Package (Top View) Maximum 0.8 mm Height for Super Thin Applications These are PbFree Devices ORDERING INFORMATION Typical Applications See detailed ordering, marking and shipping information in the package dimensions section on page 14 of this data sheet. Cellular Phones, Smart Phones, and PDAs Portable Media Players Digital Still Cameras Wireless and DSL Modems USB Powered Devices Point of Load Game and Entertainment System Semiconductor Components Industries, LLC, 2012 1 Publication Order Number: August, 2020 Rev. 3 NCP6354/DNCP6354 1uH NCP6354 Vo = 0.6V to Vin Vin = 2.3V to 5.5V PGND PVIN Rpg Cin SW AVIN 10uF 1M Cfb Cout Power Good AGND PG 10uF R1 Enable FB EN R2 Figure 1. Typical Application Circuit PIN DESCRIPTION Pin Name Type Description 1 PGND Power Power Ground for power, analog blocks. Must be connected to the system ground. Ground 2 SW Power Switch Power pin connects power transistors to one end of the inductor. Output 3 AGND Analog Analog Ground analog and digital blocks. Must be connected to the system ground. Ground 4 FB Analog Feedback Voltage from the buck converter output. This is the input to the error amplifier. This pin is Input connected to the resistor divider network between the output and AGND. 5 EN Digital Enable of the IC. High level at this pin enables the device. Low level at this pin disables the device. Input 6 PG Digital PG pin is for NCP6354 with Power Good option. It is open drain output. Low level at this pin Output indicates the device is not in power good, while high impedance at this pin indicates the device is in power good. 7 AVIN Analog Analog Supply. This pin is the analog and the digital supply of the device. An optional 1 F or Input larger ceramic capacitor bypasses this input to the ground. This capacitor should be placed as close as possible to this input. 8 PVIN Power Power Supply Input. This pin is the power supply of the device. A 10 F or larger ceramic capacitor Input must bypass this input to the ground. This capacitor should be placed as close a possible to this input. 9 PAD Exposed Exposed Pad. Must be soldered to system ground to achieve power dissipation performances. Pad This pin is internally unconnected www.onsemi.com 2