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SC508AULTRT

更新时间： 2024-01-24 03:53:23
品牌 Logo 应用领域
商升特 - SEMTECH 开关
页数 文件大小 规格书
32页 684K
描述
Switching Controller, Voltage-mode, 1000kHz Switching Freq-Max, 3 X 3 MM, HALOGEN FREE AND ROHS COMPLIANT, MLPQ-20

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SC508AULTRT 技术参数

是否Rohs认证： 符合生命周期：Active
零件包装代码：QFN包装说明：3 X 3 MM, HALOGEN FREE AND ROHS COMPLIANT, MLPQ-20
针数：20Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.73其他特性：ALSO OPERATES IN ADJUSTABLE MODE FROM 0.6 TO 5.5V
模拟集成电路 - 其他类型：SWITCHING CONTROLLER控制模式：VOLTAGE-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：46 V
最小输入电压：4.5 V标称输入电压：12 V
JESD-30 代码：S-XQCC-N20长度：3 mm
功能数量：1端子数量：20
最高工作温度：125 °C最低工作温度：-40 °C
标称输出电压：5 V封装主体材料：UNSPECIFIED
封装代码：HVQCCN封装等效代码：LCC20,.11SQ,16
封装形状：SQUARE封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：NOT SPECIFIED认证状态：Not Qualified
座面最大高度：0.6 mm子类别：Switching Regulator or Controllers
表面贴装：YES切换器配置：PUSH-PULL
最大切换频率：1000 kHz温度等级：AUTOMOTIVE
端子形式：NO LEAD端子节距：0.4 mm
端子位置：QUAD处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：3 mmBase Number Matches：1

SC508AULTRT 数据手册

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SC508/SC508A  
EcoSpeed®DC-DC Buck Controller  
with Integrated LDO  
POWER MANAGEMENT  
Features  
Description  
Power system  
®
The SC508/SC508A is a synchronous EcoSpeed buck reg-  
• Input voltage — 4.5V to 46V  
• Output voltage — 0.6V to >85% x VIN  
• Integrated bootstrap switch  
• Fixed 5V LDO output — 200mA  
• 1% reference  
ulator which incorporates Semtech’s advanced, patented  
adaptive on-time control architecture to provide excellent  
light-load efficiency and fast transient response. It fea-  
tures an integrated bootstrap switch and a fixed 5V LDO in  
a 3 x 3(mm) package. The device is highly efficient and  
uses minimal PCB area. The SC508A is available for auto-  
motive applications and is qualified to AEC-Q100.  
• Selectable internal/external bias power supply  
®
• EcoSpeed architecture with pseudo-fixed fre-  
quency adaptive on-time control  
Logic input and output control  
• Independent control EN for LDO and switcher  
• Programmable soft-start time  
• Programmable VIN UVLO threshold  
• Power Good output  
The SC508 supports using standard capacitor types such as  
electrolyticorspecialpolymer,inadditiontoceramic,atswitch-  
ing frequencies up to 1MHz. The programmable frequency,  
synchronous operation, and programmable power-save  
provide high efficiency operation over a wide load range.  
• Selectable power-save mode for >80% effi-  
ciency under light load  
• Programmable ultrasonic power-save mode  
SmartDriveTM for reduced EMI  
Protections  
Additional features include cycle-by-cycle current limit,  
programmable soft-start, under and over-voltage protec-  
tion, programmable over-current protection, start-up into  
pre-biased output, automatic fault recovery (hiccup restart),  
soft-shutdown, selectable power-save modes, and pro-  
grammable ultrasonic power-save. The device also provides  
separate enable inputs for the PWM controller and LDO as  
well as a power good output for the PWM controller. Output  
voltage range is 0.6 to 5V, with output voltages greater than  
5V supported using additional components.  
• Automatic restart on fault shutdown  
• Over-voltage and under-voltage  
• TC compensated RDS(ON) sensed current limit  
• Thermal shutdown  
• Smart power-save  
• Pre-bias start-up  
Capacitor types: SP, POSCAP, OSCON, and ceramic  
Package — 3 x 3(mm), 20-pin MLPQ  
Lead-free and halogen-free  
The input voltage can range from 4.5V to 46V. The wide  
input voltage range, programmable frequency, and inte-  
grated 5V LDO make the device extremely flexible and  
easy to use in a broad range of applications. Support is  
provided for multi-cell battery systems in addition to tra-  
ditional DC power supply applications.  
RoHS and WEEE compliant  
AEC-Q100 Qualified available in SC508A  
Applications  
Office automation and computing  
Networking and telecommunication equipment  
Point-of-load power supplies and module replacement  
Automotive applications  
Typical Application Circuit  
VEXT or VLDO  
VIN  
PGOOD  
EN  
VIN  
PGOOD  
ENABLE  
CIN  
+
DH  
LX  
SC508  
SC508A  
ENL  
ENABLE LDO  
VOUT  
RTON  
1µF  
L1  
TON  
VDDA  
VDDP  
3.3O  
RLIM  
COUT  
BST  
ILIM  
VEXT or VLDO  
0.1µF  
DL  
VOUT  
VLDO  
SS  
VLDO  
PSV  
1µF  
10nF  
FB  
PSV  
AGND  
PGND  
© 2012 Semtech Corporation  
Revision 4.3  
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