NCP3102C Buck Converter Datasheet

NCP3102C Datasheet, PDF, Equivalent


Part Number

NCP3102C

Description

Wide Input Voltage Synchronous Buck Converter

Manufacture

ON Semiconductor

Total Page 26 Pages
Datasheet
Download NCP3102C Datasheet


NCP3102C
NCP3102C
Wide Input Voltage
Synchronous Buck Converter
The NCP3102C is a high efficiency, 10 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 NCP3102C can
continuously output 10 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 NCP3102C 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
NCP3102C 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
http://onsemi.com
MARKING
DIAGRAM
1 40
A
WL
YY
WW
G
QFN40, 6x6
NCP3102C
CASE 485AK AWLYYWWG
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb--Free Package
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 24 of this data sheet.
D1
CBST
CPHS BST
CIN PWRVCC PWRPHS
PWRVCC
EP
VCC
PWRPHS
(EP)
PWRGND
CVCC
PWRGND
BG
COMP/DIS
(EP)
RSET
CP FC
AGND
(EP)
FB
AGND
CC
LO
CO
100
95
90
85
R1 80
75
70
65
R2 60
55
VIN = 5.0 V
VIN = 12 V
Figure 1. Typical Application Diagram
50
01 2 3 4 5 6 7 8
IOUT (A)
Figure 2. Efficiency
9 10
Semiconductor Components Industries, LLC, 2011
February, 2011 -- Rev. 0
1
Publication Order Number:
NCP3102C/D

NCP3102C
NCP3102C
FB
16
Vref
COMP
DIS
17
400 mV
--
+
0.8 V
VCC
13
POR
UVLO
-- FAULT
+
50 mV --550 mV
VOCTH
CPHS
BST TGOUT TGIN
24 21 25
--
+
CLOCK
R
PWM
OUT
Q
S
FAULT
+
-- 2 V
RAMP
OSC
FAULT
VCC
OSC
--
+
LATCH
2 V --
+
Figure 3. Detailed Block Diagram
VOCTH
SET
10 mA
14,15,19,20,23
AGND
35
BG
PWRVCC
26--34
PWRPHS
1--4
36--40
CPHS
22
5--12
PWRGND
http://onsemi.com
2


Features NCP3102C Wide Input Voltage Synchronous Buck Converter The NCP3102C is a high efficiency, 10 A DC--DC buck converter designed to operate from a 5 V to 12 V supply. The device is capable of produc ing an output voltage as low as 0.8 V. The NCP3102C can continuously output 10 A through MOSFET switches driven by an internally set 275 kHz oscillator. The 40--pin device provides an optimal lev el of integration to reduce size and co st of the power supply. The NCP3102C al so incorporates an externally compensat ed transconductance error amplifier and a capacitor programmable soft--start f unction. Protection features include pr ogrammable short circuit protection and input under voltage lockout (UVLO). Th e NCP3102C is available in a 40--pin QF N package. Features  Split Power Rai l 2.7 V to 18 V on PWRVCC  275 kHz I nternal 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  Capaci.
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