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