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SC1480ITSTR

更新时间： 2024-11-11 04:05:35
品牌 Logo 应用领域
商升特 - SEMTECH 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管双倍数据速率
页数 文件大小 规格书
22页 534K
描述
DDR Memory Power Supply Controller

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中文翻译

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SC1480ITSTR 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, TSSOP14,.25针数：14
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.82
Is Samacsys：N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：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-G14
JESD-609代码：e3长度：5 mm
湿度敏感等级：1功能数量：1
端子数量：14最高工作温度：125 °C
最低工作温度：-40 °C最大输出电流：2 A
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
封装等效代码：TSSOP14,.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：PUSH-PULL温度等级：AUTOMOTIVE
端子面层：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 mm
Base Number Matches：1

SC1480ITSTR 数据手册

 浏览型号SC1480ITSTR的Datasheet PDF文件第2页浏览型号SC1480ITSTR的Datasheet PDF文件第3页浏览型号SC1480ITSTR的Datasheet PDF文件第4页浏览型号SC1480ITSTR的Datasheet PDF文件第5页浏览型号SC1480ITSTR的Datasheet PDF文件第6页浏览型号SC1480ITSTR的Datasheet PDF文件第7页 
SC1480  
DDR Memory  
Power Supply Controller  
POWER MANAGEMENT  
Description  
Features  
The SC1480 is a single output, constant on-time  
synchronous-buck, pseudo-fixed frequency, PWM  
controller intended for use in notebook computers and  
other battery operated portable devices. Features  
include high efficiency and fast dynamic response with  
no minimum on time, a reference input and a buffered  
REFOUT pin capable of sourcing 3mA. The excellent  
transient response means that SC1480 based solutions  
will require less output capacitance than competing fixed  
frequency converters.  
‹ Constant on-time for fast dynamic response  
‹ Programmable VOUT based on external reference  
‹ VIN range = 1.8V – 25V  
‹ DC current sense using low-side RDS(ON) sensing  
or sense resistor  
‹ 3mA reference output buffer  
‹ Low power S3 state  
‹ Resistor programmable frequency  
‹ Cycle-by-cycle current limit  
‹ Digital soft start  
‹ Output current source-sink capability  
‹ Overvoltage/under-voltage fault protection and  
PGOOD output  
‹ Under 10uA typical shutdown current  
‹ Low quiescent power dissipation  
‹ 14-Pin TSSOP package. Also available in Lead-free  
package which is fully WEEE and RoHS compliant  
‹ Industrial temperature range  
The frequency is constant until a step in load or line voltage  
occurs, at which time the pulse density and frequency  
will increase or decrease to counter the change in output  
or input voltage. After the transient event, the controller  
frequency will return to steady state operation.  
The SC1480 incorporates two power-reducing states,  
standby and shutdown. In standby mode, the switcher  
output is shutdown but the buffered reference output  
stays up, reducing quiescent current to a low 125µA. This  
is particularly useful for reducing battery draw in systems  
which implement a suspend-to-RAM (S3) state. The  
SC1480 can be completely shut down, drawing less than  
10µA.  
‹ Integrated gate drivers with soft switching  
‹ Efficiency >90%  
Applications  
‹ Notebook computers  
‹ CPU I/O supplies  
‹ Handheld terminals and PDAs  
‹ LCD monitors  
‹ Network power supplies  
The integrated gate drivers feature adaptive shoot-  
through protection and soft switching. Additional features  
include cycle-by-cycle current limit, digital soft-start,  
overvoltage and under-voltage protection, and a PGOOD  
output.  
Typical Application Circuit  
4.5V - 25V  
VDD = 2.5V  
+5VRUN  
C1  
R1  
C2  
REFOUT  
D1  
C3  
R5  
+5VSB  
R2  
R3  
C4  
+5V  
C5  
R4  
Q1  
U1  
1
2
3
4
5
6
7
14  
REFIN  
BST  
DH  
13  
12  
11  
10  
9
L1  
TON  
1.25VOUT  
REFOUT  
VCCA  
FBK  
LX  
ILIM  
VDDP  
DL  
R6  
C6  
C7  
+
PGOOD  
PGOOD  
GND  
8
Q2  
D2  
PGND  
SC1480  
C10  
R7  
C8  
C9  
Revision: August 30, 2006  
1
www.semtech.com  
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中文翻译

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