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NB675 参数 Datasheet PDF下载

NB675图片预览
型号: NB675
PDF下载: 下载PDF文件 查看货源
内容描述: 24V高电流同步降压转换器1.5A LDO和磨光参考 [24V, High Current Synchronous Buck Converter With 1.5A LDO and Buffed Reference]
分类和应用: 转换器
文件页数/大小: 21 页 / 617 K
品牌: MPS [ MONOLITHIC POWER SYSTEMS ]
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NB675 –24V, HIGH CURRENT SYNCHRONOUS BUCK CONVERTER  
ELECTRICAL CHARACTERISTICS  
VIN = 12V, TJ = 25°C, unless otherwise noted.  
Parameters  
Symbol Condition  
Min  
Typ  
Max  
Units  
Supply Current  
Supply Current (Shutdown)  
IIN  
IIN  
VEN = 0V  
EN1 = VEN1 =2V,  
VFB = 0.65V, IVTT = 0A  
EN1 = 0V, VEN2 = 2V,  
0
1
μA  
μA  
V
Supply Current (In S0 Mode)  
Supply Current (In S3 Mode)  
300  
160  
400  
500  
V
IIN  
190  
220  
μA  
VFB = 0.65V  
MOSFET  
High-side Switch On Resistance  
HSRDS-ON  
LSRDS-ON  
SWLKG  
25  
9
mΩ  
mΩ  
μA  
TJ =25°C  
Low-side Switch On Resistance  
Switch Leakage  
TJ =25°C  
VEN = 0V, VSW = 0V  
0
1
Current Limit  
Low-side Valley Current Limit  
ILIMIT  
10  
11  
12  
A
Switching frequency and minimum off time  
Switching frequency  
Minimum Off Time(6)  
FS  
400  
250  
500  
300  
600  
350  
kHz  
ns  
TOFF  
Over-voltage and Under-voltage Protection  
OVP Threshold  
OVP Delay  
VOVP  
TOVPDEL  
VUVP  
125  
55  
130  
2.5  
60  
135  
65  
%VREF  
μs  
UVP Threshold  
UVP Delay  
%VREF  
μs  
TUVPDEL  
12  
Reference And Soft Start  
Reference Voltage  
Feedback Current  
Soft Start Time  
VREF  
IFB  
598  
604  
10  
610  
50  
mV  
nA  
VFB = 0.604V  
TSS  
1.6  
1.95  
ms  
Enable And UVLO  
Enable Input Low Voltage  
Enable Hysteresis  
VILEN  
1.15  
1.25  
100  
3
1.35  
4.85  
V
VEN-HYS  
mV  
VEN = 2V  
VEN = 0V  
Enable Input Current  
IEN  
μA  
0
VCC Under Voltage Lockout  
Threshold Rising  
VCCVth  
4.5  
V
VCC Under Voltage Lockout  
Threshold Hysteresis  
VCCHYS  
500  
mV  
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.  
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