NCP6343FCT1G ON Semiconductor

Synchronous Buck Converter - Step Down 3.0 A NCP6343 The NCP6343 is a synchronous buck converter optimized to supply the different sub systems of portable applications powered by one cell LiIon or three cell Alkaline/NiCd/NiMH batteries. The device is able www.onsemi.com to deliver up to 3.0 A, with programmable output voltage from 0.6 V to 1.4 V. It can share the same output rail with another DCDC and MARKING works as a transient load helper. Operation at a 3 MHz switching DIAGRAM frequency allows the use of small components. Synchronous 6343x rectification and automatic PWM/PFM transitions improve overall WLCSP15 ALYWW solution efficiency. The NCP6343 is in a space saving, low profile CASE 567GB 1.99 x 1.34 mm CSP15 package. x = P: Prototype = Blank: 1.225 V 2.0 A Features = A: 1.225 V 3.0 A Input Voltage Range from 2.3 V to 5.5 V: Battery and 5 V Rail = B: 1.225 V 3.0 A Powered Applications = D: 1.18125 V 3.0 A = M: 0.925 V 3.0 A Programmable Output Voltage: 0.6 V to 1.4 V in 6.25 mV Steps = S: 1.050 V 3.0 A Modular Output Stage Drive Strength for Increased Efficiency = V: 1.225 V 3.0 A = X: 1.225 V 3.0 A Depending on the Output Current A = Assembly Location 3 MHz Switching Frequency with On Chip Oscillator L = Wafer Lot Uses 470 nH Inductor and 22 F Capacitors for Optimized Footprint Y = Year WW = Work Week and Solution Thickness = PbFree Package PFM/PWM Operation for Optimum Increased Efficiency PbFree indicator, G or microdot ( ), Ultra Low 0.8 A Off Mode Current may or may not be present Low 35 A Quiescent Current 2 I C Control Interface with Interrupt and Dynamic Voltage Scaling PINOUT DIAGRAM Support NCP6343 2 3 1 Thermal Protections and Temperature Management Transient Load Helper: Share the Same Rail with Another DCDC A PVIN SW PGND Small 1.99 x 1.34 mm / 0.4 mm Pitch CSP Package These are PbFree Devices Typical Applications B PVIN SW PGND Smartphones Webtablets C PVIN PGND PGND NCP6343 A1 PVIN B1 AVIN D1 Supply Input Supply Input C1 Core References 10 uF Oscillator AGND E1 D AVIN EN SDA DCDC SW A2 3.0 A B2 470 nH Thermal Protection 22 uF A3 PGND B3 C3 Enable Control EN C2 D2 E AGND SCL FB Input Operating Mode FB E3 Core DCDC SDA D3 Control Processor 3 MHz Sense 22 uF Processor I C I C (Top View) Control Interface Controller Memory SCL E2 15Pin 0.40 mm pitch WLCSP ORDERING INFORMATION Figure 1. Typical Application Circuit See detailed ordering and shipping information on page 30 of this data sheet. Semiconductor Components Industries, LLC, 2015 1 Publication Order Number: August, 2020 Rev. 13 NCP6343/DNCP6343 SUPPLY PVIN INPUT POWER AVIN INPUT Core 3.0 A AGND DCDC ANALOG Thermal SW GROUND MODULAR Protection SWITCH DRIVER NODE Output Voltage Monitoring ENABLE CONTROL INPUT 3 MHz DCDC Operating PGND EN Converter Mode Control Controller POWER 2 PROCESSOR I C GROUND Logic Control SCL Interrupt SDA 2 I C Sense FB CONTROL INTERFACE FEEDBACK Figure 2. Simplified Block Diagram www.onsemi.com 2