NCP3101CMNTXG Datasheet, PDF (1/26 Pages) ON Semiconductor – Wide Input Voltage Synchronous Buck Converter

NCP3101C
Wide Input Voltage
Synchronous Buck Converter
The NCP3101C is a high efficiency, 6 A DC−DC buck converter
designed to operate from a 5 V to 12 V supply. The device is capable
of producing an output voltage as low as 0.8 V. The NCP3101C can
continuously output 6 A through MOSFET switches driven by an
internally set 275 kHz oscillator. The 40−pin device provides an
optimal level of integration to reduce size and cost of the power
supply. The NCP3101C also incorporates an externally compensated
transconductance error amplifier and a capacitor programmable
soft−start function. Protection features include programmable short
circuit protection and input under voltage lockout (UVLO). The
NCP3101C is available in a 40−pin QFN package.
Features
• Split Power Rail 2.7 V to 18 V on PWRVCC
• 275 kHz Internal Oscillator
• Greater Than 90% Max Efficiency
• Boost Pin Operates to 35 V
• Voltage Mode PWM Control
• 0.8 V $1% Internal Reference Voltage
• Adjustable Output Voltage
• Capacitor Programmable Soft−Start
• 85% Max Duty Cycle
• Input Undervoltage Lockout
• Resistor Programmable Current Limit
• These are Pb−Free Devices
Applications
• Servers / Networking
• DSP and FPGA Power Supply
• DC−DC Regulator Modules
D1
CBST
CPHS BST
CIN
PWRVCC PWRPHS
PWRVCC
EP
VCC
PWRPHS
(EP)
PWRGND
CVCC
PWRGND
BG
(EP)
COMP/DIS
RSET
CP
FC
AGND
(EP)
FB
AGND
CC
LO
CO
100
95
90
85
R1
80
75
70
65
R2
60
55
50
0
Figure 1. Typical Application Diagram
http://onsemi.com
MARKING
DIAGRAM
1 40
QFN40, 6x6
CASE 485AK
NCP3101C
AWLYYWWG
A
= Assembly Location
WL = Wafer Lot
YY
= Year
WW = Work Week
G
= Pb−Free Package
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 24 of this data sheet.
V_IN = 5 V
V_IN = 12 V
V_OUT = 3.3 V
1
2
3
4
5
6
I_OUT (A)
Figure 2. Efficiency
© Semiconductor Components Industries, LLC, 2011
1
August, 2011 − Rev. 1
Publication Order Number:
NCP3101C/D