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NB675 데이터시트 PDF




MPS에서 제조한 전자 부품 NB675은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


PDF 형식의 NB675 자료 제공

부품번호 NB675 기능
기능 24V High Current Synchronous Buck Converter
제조업체 MPS
로고 MPS 로고


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NB675 데이터시트, 핀배열, 회로
The Future of Analog IC Technology
NB675
24V, High Current
Synchronous Buck Converter
With +/-1.5A LDO and Buffed Reference
DESCRIPTION
The NB675 provides a complete power supply
for DDR3, DDR3L and LPDD R2 memory with
the highest power density. It integrates a high
frequency synchronous rectified step-down
switch mod e converter (VDDQ) with an 1.5A
sink/source LDO (VTT) and buffere d low noise
reference (VTTREF).
The fully integrated Buck converter is able to
deliver 10A continuous output current and 12A
peak output current over a wide input supply
range with excellent lo ad and line regulation.
The Buck converter employs the Constant-On-
Time (COT ) control scheme, which provides
fast transient respon se and eases loop
stabilization.
The VTT LDO provi des 1.5A sink/source
current ca pability an d requires only 10u F
ceramic capacitance.
The VTTREF tracks VDDQ/2 with an excellent
1% accuracy.
Under voltage lockout is internally set as 4.5V.
An open drain power good sign al indicate s
VDDQ is within its nominal voltage range.
Full p rotection f eatures include OCP, OVP, a nd
thermal shut down.
This p art r equires min imum numb er of ex ternal
components an d is a vailable in QFN21
(3mmx4mm) package.
FEATURES
Wide 5V to 24V Operating Input Range
10A Continuous Output Current
12A Peak Output Current
Built-in +/- 1.5A VTTLDO
Low RDS(ON) Internal Power MOSFETs
Proprietary Switching Loss Reduction
Technique
Internal Soft Start
Output Discharge
500kHZ Switching Frequency
OCP, OVP, UVP Protection and Thermal
Shutdown
VDDQ Adjustable from 0.604V to 5.5V
APPLICATIONS
Laptop Computer
Tablet PC
Networking Systems
Server
Personal Video Recorders
Flat Panel Television and Monitors
Distributed Power Systems
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Products, Quality Assurance page.
“MPS” and “The Future of Analog IC Technology” are registered trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
VIN
5-21V
VIN
BST
SW
EN 1
EN 2
PG
VCC
NB675
FB
VDDQSEN
VINLDO
AGND
VTT
PGND VTTREF VTTSEN
220nF
220nF
VDDQ
1.35V/10A
VTT
0.675V/2A
95
85
75
65
55
45
35
25
15
0.001
0.01 0.1
1
LOAD CURRENT (A)
10
NB675 Rev. 1.0
1/14/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
1
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NB675 pdf, 반도체, 판매, 대치품
NB675 –24V, HIGH CURRENT SYNCHRONOUS BUCK CONVERTER
ELECTRICAL CHARACTERISTICS (continued)
VIN = 12V, TJ = 25°C, unless otherwise noted.
Parameters
Symbol Condition
VCC Regulator
VCC Regulator
VCC Load Regulation
VCC
Icc=8mA
Power Good
FB Rising (Good)
FB Falling (Fault)
FB Rising (Fault)
FB Falling (Good)
Power Good Low to High Delay
Power Good Sink Current
Capability
Power Good Leakage Current
VTTREF Output
VTTREF Output Voltage
Output Voltage tolerance to
VDDQ
Current Limit
VTT LDO
VTT Output Voltage
VTT tolerance to VTTREF
Source Current Limit
Sink Current Limit
Thermal Protection
Thermal Shutdown(6)
Thermal Shutdown Hysteresis
Note:
6) Guaranteed by design.
PGVth-Hi
PGVth-Lo
PGVth-Hi
PGVth-Lo
PGTd
VPG Sink
4mA
IPG_LEAK
VPG = 3.3V
VTTREF
ILIMIT_VTTREF
IVTTREF<0.1mA,
1V<VDDQ<1.4V
IVTTREF<10mA,
1V<VDDQ<1.4V
10
VTT
ILIMIT_SOUCE
ILIMIT_SINK
-10mA<IVTT<10mA,
1V<VDDQ<1.4V
-1A<IVTT<1A,
1V<VDDQ<1.4V
TSD
Min Typ
4.8 5.1
5
95
85
115
105
450
VDDQSEN/2
48.2% 50% 51.8%
48% 50%
15
VTTREF
-20
-45
1.8
1.6
150
25
Max
5.3
0.4
1
52%
20
45
Units
V
%
%VREF
μs
V
μA
mA
mV
mV
A
A
°C
°C
NB675 Rev. 1.0
1/14/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
4

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NB675 전자부품, 판매, 대치품
NB675 –24V, HIGH CURRENT SYNCHRONOUS BUCK CONVERTER
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN =20V, VDDQ =1.35V, L=1.2µH, TJ=+25°C, unless otherwise noted.
Output Voltage Ripple
IOUT = 0A
Output Voltage Ripple
IOUT = 10A
Power Good through
EN Start-Up
IOUT = 0A
VDDQ
50mV/div.
VSW
10V/div.
VDDQ
50mV/div.
VSW
10V/div.
VDDQ
500mV/div.
VEN2
5V/div.
VPG
5V/div.
IL
1A/div.
IL
10A/div.
IL
1A/div.
Power Good through
EN Start-Up
IOUT = 10A
Start-Up through VIN
IOUT = 0A
Start-Up through VIN
IOUT = 10A
VDDQ
500mV/div.
VEN2
5V/div.
VPG
5V/div.
IL
10A/div.
VDDQ
500mV/div.
VIN
10V/div.
VSW
10V/div.
IL
5A/div.
VDDQ
500mV/div.
VIN
10V/div.
VSW
10V/div.
IL
10A/div.
Shutdown through VIN
IOUT = 0A
Shutdown through VIN
IOUT = 10A
Start-Up through EN
IOUT = 0A
VDDQ
1V/div.
VIN
10V/div.
VSW
2V/div.
IL
2A/div.
VDDQ
1V/div.
VIN
5V/div.
VSW
5V/div.
IL
5A/div.
VDDQ
1V/div.
VEN2
5V/div.
VSW
20V/div.
IL
2A/div.
NB675 Rev. 1.0
1/14/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
7

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