NCP6335 Datasheet, PDF (1/30 Pages) ON Semiconductor – Configurable 4.0 A Step Down Converter - Transient Load Helper

NCP6335
Configurable 4.0 A Step
Down Converter - Transient
Load Helper
The NCP6335 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 4.0 A, with programmable output voltage from 0.6 V
to 1.4 V. It can share the same output rail with another DC−to−DC
converter 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 NCP6335 is in a space
saving, low profile 2.0 x 1.6 mm CSP−20 package.
Features
• 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
• 3 MHz Switching Frequency with on Chip Oscillator
• Uses 470 nH Inductor and 2 x 22 mF Capacitors for Optimized
Footprint and Solution Thickness
• PFM/PWM Operation for Optimum Increased Efficiency
• Low 35 mA Quiescent Current
• I²C Control Interface with Interrupt and Dynamic Voltage Scaling
Support
• Enable Pins, Power Good/Fail Signaling
• Thermal protections and Temperature Management
• Transient Load Helper: Share the Same Rail with Another DCDC
• Small 2.0 x 1.6 mm / 0.4 mm pitch CSP Package
• These are Pb−Free Devices
Typical Applications
• Smartphones
• Webtablets
AGND B4
Enable Control EN
A2
Input
VSEL A1
Power Fail
B3
Interrupt
B2
Processor I@C ^SDA
B1
Control Interface
SCL
A3
Core
Thermal
Protection
Operating
Output
Monitoring
I@C
DCDC
4.0 A
Modular
Driver
DCDC
3 MHz
Controller
Sense
D1 AVIN
D2 PVIN
E1
E2
4.7 uF
D3
D4
SW
E3
E4
470 nH
2x 22 uF
C1
C2 ^PGND
C3
C4
A4 ^FB
Supply Input
Processor
Core
Figure 1. Typical Application Circuit
http://onsemi.com
WLCSP20
CASE 568AG
MARKING DIAGRAM
6335x
AWLYWW
G
x = D1: Prototype
= F: 3.5 A
= D: 2.5 A (Stand−Alone)
A = Assembly Location
WL = Wafer Lot
Y = Year
WW = Work Week
G = Pb−Free Package
Pb−Free indicator, G or microdot (G),
may or may not be present
PIN OUT
1
2
3
4
A
VSEL
EN
SCL
FB
B
SDA
PGND
INTB*
PGND
PG*
AGND
C
PGND
PGND
PGND
PGND
D
AVIN
PVIN
SW
SW
E
PVIN
PVIN
SW
SW
(Top View)
*Optional
ORDERING INFORMATION
See detailed ordering and shipping information on page 29 of
this data sheet.
© Semiconductor Components Industries, LLC, 2014
1
April, 2014 − Rev. 5
Publication Order Number:
NCP6335/D