3 MHz, 2 A Synchronous Buck Converter High Efficiency, Low Ripple, Adjustable Output Voltage NCP6334B, NCP6334C www.onsemi.com The NCP6334B/C, a family of synchronous buck converters, which is optimized to supply different sub systems of portable applications MARKING powered by one cell Liion or three cell Alkaline/NiCd/NiMH DIAGRAM batteries. The devices are able to deliver up to 2 A on an external adjustable voltage. Operation with 3 MHz switching frequency allows 1 1 Ax M employing small size inductor and capacitors. Input supply voltage WDFN8 feedforward control is employed to deal with wide input voltage CASE 511BE range. Synchronous rectification and automatic PWM/PFM power save mode offer improved system efficiency. The NCP6334B/C is in a Ax = Specific Device Code space saving, low profile 2.0 x 2.0 x 0.75 mm WDFN8 package. M = Date Code = PbFree Package Features (Note: Microdot may be in either location) 2.3 V to 5.5 V Input Voltage Range External Adjustable Voltage Up to 2 A Output Current PINOUT 3 MHz Switching Frequency Synchronous Rectification PGND 1 8 PVIN Automatic Power Save (NCP6334B) or External Mode Selection (NCP6334C) SW 2 7 AVIN Enable Input 9 Power Good Output Option (NCP6334B) AGND 3 6 MODE/PG Soft Start Over Current Protection FB 4 5EN Active Discharge When Disabled Thermal Shutdown Protection (Top View) WDFN8, 2 x 2 mm, 0.5 mm Pitch Package Maximum 0.8mm Height for Super Thin Applications This is a PbFree Device ORDERING INFORMATION See detailed ordering, marking and shipping information in the package dimensions section on page 2 of this data sheet. Typical Applications 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. 4 NCP6334B/DNCP6334B, NCP6334C NCP6334B NCP6334C 1uH Vo = 0.6V to Vin 1uH Vin = 2.3V to 5.5V Vin = 2.3V to 5.5V Vo = 0.6V to Vin PGND PVIN PGND PVIN Cin Rpg Cout Cout Cin SW AVIN SW AVIN 10uF 10uF 1M Cfb Cfb Power Good Mode 10uF 10uF MODE AGND PG AGND R1 R1 Enable Enable FB EN FB EN R2 R2 (a) Power Good Output Option (b) External Mode Selection (NCP6334B) (NCP6334C) Figure 1. Typical Application Circuits 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 Input is 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 de- Input vice. 6 PG/MODE Digital PG pin is for NCP6334B 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. MODE pin is for NCP6334C with mode external selection option. High level at this pin forces the device to operate in forced PWM mode. Low level at this pin enables the device to operate in automatic PFM/PWM mode for power saving function. 7 AVIN Analog Analog Supply. This pin is the analog and the digital supply of the device. An optional 1 F or lar- Input ger 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 capacit- Input or 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 ORDERING INFORMATION Device Marking Package Shipping NCP6334BMTAATBG AA WDFN8 3000 / Tape & Reel (PbFree) NCP6334CMTAATBG AC WDFN8 3000 / Tape & Reel (PbFree) For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. www.onsemi.com 2