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SC1485ITSTRT

更新时间： 2024-11-10 22:33:35
品牌 Logo 应用领域
商升特 - SEMTECH 控制器
页数 文件大小 规格书
17页 363K
描述
Dual Synchronous Buck Pseudo Fixed Frequency Power Supply Controller

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中文翻译

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SC1485ITSTRT 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Obsolete零件包装代码：TSSOP
包装说明：TSSOP, TSSOP28,.25针数：28
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.81
其他特性：ALSO OPRERATES IN ADJUSTABLE MODE FROM 0.5 TO 5.5V模拟集成电路 - 其他类型：DUAL SWITCHING CONTROLLER
控制模式：VOLTAGE-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：5.5 V最小输入电压：4.5 V
标称输入电压：5 VJESD-30 代码：R-PDSO-G28
JESD-609代码：e3长度：9.7 mm
湿度敏感等级：1功能数量：1
端子数量：28最高工作温度：125 °C
最低工作温度：-40 °C最大输出电流：3.1 A
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
封装等效代码：TSSOP28,.25封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：260
认证状态：Not Qualified座面最大高度：1.2 mm
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：PHASE-SHIFT技术：CMOS
温度等级：AUTOMOTIVE端子面层：Matte Tin (Sn)
端子形式：GULL WING端子节距：0.65 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：4.4 mmBase Number Matches：1

SC1485ITSTRT 数据手册

 浏览型号SC1485ITSTRT的Datasheet PDF文件第2页浏览型号SC1485ITSTRT的Datasheet PDF文件第3页浏览型号SC1485ITSTRT的Datasheet PDF文件第4页浏览型号SC1485ITSTRT的Datasheet PDF文件第5页浏览型号SC1485ITSTRT的Datasheet PDF文件第6页浏览型号SC1485ITSTRT的Datasheet PDF文件第7页 
SC1485  
Dual Synchronous Buck Pseudo Fixed  
Frequency Power Supply Controller  
POWER MANAGEMENT  
Description  
Features  
The SC1485 is a dual output constant on synchronous- ꢀ Constant on-time for fast dynamic response  
buck PWM controller intended for use in notebook ꢀ Programmable VOUT range = 0.5 – VCCA  
computers and other battery operated portable devices. ꢀ VIN Range = 1.8V – 25V  
Features include high efficiency and a fast dynamic ꢀ DC current sense using low-side RDS(ON)  
response with no minimum on time. The excellent  
sensing or sense resistor  
transient response, means that SC1485 based solutions ꢀ Resistor programmable frequency  
will require less output capacitance than competing fixed ꢀ Cycle-by-cycle current limit  
frequency converters.  
ꢀ
Digital soft-start  
ꢀ
Separate PSAVE option for each switcher  
The frequency is constant until a step in load or line voltage ꢀ Over-voltage/Under-voltage fault protection  
occurs at which time the pulse density and frequency will ꢀ 10uA Typical shutdown current  
increase or decrease to counter the change in output or ꢀ Low quiescent power dissipation  
input voltage. After the transient event, the controller ꢀ Two PGOOD indicators  
frequency will return to steady state operation. At light ꢀ 1% Reference (2% system DC accuracy)  
loads, Power-Save Mode enables the SC1485 to skip ꢀ Efficiency >90%  
PWM pulses for better efficiency.  
ꢀ
ꢀ
Integrated gate drivers with soft switching  
Separate enables  
Each output voltage can be independently adjusted from ꢀ 28 Lead TSSOP  
0.5V to VCCA. Two frequency setting resistors set the ꢀ Industrial temperature range  
on-time for each buck controller. The frequency can thus  
Applications  
be tailored to minimize crosstalk. The integrated gate  
drivers feature adaptive shoot-through protection and  
soft switching. Additional features include cycle-by-cycle  
current limit, digital soft-start, over-voltage and under-  
voltage protection, and a PGOOD output for each  
controller.  
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
Notebook computers  
CPU I/O supplies  
Handheld terminals and PDAs  
LCD monitors  
Network power supplies  
Typical Application Circuit  
R1  
23  
27  
PGOOD1  
PGOOD2  
VBAT  
TON1  
PGOOD1  
PGOOD2  
R2  
VBAT  
9
8
13  
SC1485  
TON2  
EN2  
EN1  
EN/PSV2  
EN/PSV1  
Q4  
Q3  
22  
20  
19  
18  
16  
15  
12  
26  
DH2  
LX2  
L2  
R8  
Q1  
VOUT2  
6
5
4
2
1
DH1  
ILIM2  
DL2  
+
C8  
R7  
R6  
VOUT1  
LX1  
L1  
R3  
ILIM1  
DL1  
PGND2  
FBK2  
FBK1  
+
C7  
Q2  
R4  
R5  
PGND1  
PGND1  
PGND1  
Revision: October 14, 2004  
1
www.semtech.com  
1234567...17

中文翻译

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SC1485ITSTRT 替代型号

型号 品牌 替代类型 描述 数据表
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