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부품번호 | NB670 기능 |
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기능 | 24V High Current Synchronous Buck Converter | ||
제조업체 | MPS | ||
로고 | |||
전체 19 페이지수
The Future of Analog IC Technology
NB670
24V, High Current
Synchronous Buck Converter With LDO
DESCRIPTION
The NB670 is a fully integrated hig h frequen cy
synchronous rectified step-d own s witch mode
converter with 3.3V f ixed output voltage. It
offers very compact solution to achieve 6 A
continuous output cu rrent and 9A peak output
current ove r a wide in put supply range with
excellent load and line regulation. The NB670
operates at high efficiency over a wide output
current load range. Constant-On-Time (COT )
control mod e provides fast transient respo nse
and eases loop stabilization.
Under voltage lockout is internally set as 4.65 V.
An open drain po wer good signal indicates the
output is within its nominal voltage range.
NB670 also provides a 3.3V LDO, which can be
used to power the external peripheries, such as
the keyboard cont roller in the lapto p compute r.
A 300kHz CLK is also a vailable; its output can
be used to drive an external charge pump,
generating gate d rive voltage for the loa d
switches without redu cing the main converte r’s
efficiency.
Full protection feature s include OCP, OVP,
UVP and thermal shut down.
The converter requires minimum number of
external components and is availa ble in QFN16
(3mmx3mm) package.
TYPICAL APPLICATION
FEATURES
• Wide 5V to 24V Operating Input Range
• 3.3V Fixed Output Voltage
• Built-in 3.3V, 100mA LDO with Switches
• 6A Continuous Output Current
• 9A Peak Output Current
• 300kHZ CLK for External Charge Pump
• Lo w 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
APPLICATIONS
• Laptop Computer
• Tablet PC
• Net working Systems
• 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.
100
95
90
85
80
75
70
65
60
55
50 1
VIN=6V
VIN=8.4V
VIN=12.6V
VIN=19V
10 100 1000 10000
OUTPUT CURRENT (A)
NB670 Rev. 1.01
7/23/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
1
http://www.Datasheet4U.com
NB670 ― 24V, HIGH CURRENT SYNCHRONOUS BUCK CONVERTER WITH LDO
ELECTRICAL CHARACTERISTICS (continued)
VIN = 12V, TJ = 25°C, unless otherwise noted.
Parameters Sy
mbol Condition
CLK Output
CLK Output High Level Voltage
CLK Output Low Level Voltage
CLK Frequency
LDO Regulator
LDO Regulator
LDO Load Regulation
LDO Load Capability
Switch Rdson
VCC Regulator
VCLKH
VCLKL
FCLK
IVclk= -5mA
IVclk= 5mA
TJ = 25°C
VLDO
RSwitch
ILDO =50mA
Before switch-over
After switch-over
ILDO =50mA
VCC Regulator
VCC Load Regulation
VCC
Icc=5mA
Power Good
PG Rising (Good)
PG Falling (Fault)
PG Rising (Fault)
PG Falling (Good)
Power Good Lower to High Delay
Power Good Sink Current
Capability
Power Good Leakage Current
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
TSD
Min Typ Max Units
3.1 3.
0
30
25 3.
0.05
0
4
0.1
V
V
kHz
3.25 3.
5
70
100
35 3.
90
1.7
45
120
2.2
V
%
mA
mA
Ω
4.95 5.
15 5.
5
35
V
%
95
85
115
%
VOUT_Ref
105
0.5 ms
0.4 V
100 nA
150 °C
25 °C
NB670 Rev. 1.01
7/23/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
4
4페이지 NB670 ― 24V, HIGH CURRENT SYNCHRONOUS BUCK CONVERTER WITH LDO
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Performance waveforms are tested on the evaluation board of the Design Example section.
VIN=12V, VOUT =3.3V, L=2µH, TJ=+25°C, unless otherwise noted.
Input/Output Voltage Ripple Input/Output Voltage Ripple Power Good through VIN
IOUT = 0A
IOUT = 6A
Start-Up
IOUT = 6A
VOUT(AC)
50mV/div.
VIN(AC)
200mV/div.
VSW
5V/div.
IL
2A/div.
VOUT(AC)
50mV/div.
VIN(AC)
200mV/div.
VSW
10V/div.
IL
5A/div.
VOUT
2V/div.
VIN
5V/div.
VPG
5V/div.
IL
5A/div.
Power Good through
VIN Shutdown
IOUT = 6A
Power Good through
EN Start-Up
IOUT = 6A
Power Good through
EN Shut-Down
IOUT = 6A
VOUT
2V/div.
VIN
5V/div.
VPG
5V/div.
IL
5A/div.
VOUT
2V/div.
VEN
5V/div.
VPG
5V/div.
IL
5A/div.
VOUT
2V/div.
VEN
5V/div.
VPG
5V/div.
IL
10A/div.
Start-Up through VIN
IOUT = 0A
Start-Up through VIN
IOUT = 6A
Shut-Down through VIN
IOUT = 0A
VOUT
2V/div.
VIN
5V/div.
VSW
5V/div.
IL
5A/div.
VOUT
2V/div.
VIN
5V/div.
VSW
10V/div.
IL
5A/div.
VOUT
2V/div.
VIN
5V/div.
VSW
5V/div.
IL
5A/div.
NB670 Rev. 1.01
7/23/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
7
7페이지 | |||
구 성 | 총 19 페이지수 | ||
다운로드 | [ NB670.PDF 데이터시트 ] |
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구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
부품번호 | 상세설명 및 기능 | 제조사 |
NB670 | 24V High Current Synchronous Buck Converter | MPS |
NB671 | 24V High Current Synchronous Step-down Converter | MPS |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |