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SC4603IMSTRT PDF预览

SC4603IMSTRT

更新时间： 2024-11-26 03:58:51
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信息通信管理
页数 文件大小 规格书
16页 318K
描述
Very Low Input, MHz Operation, High Efficiency Synchronous Buck

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中文翻译

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SC4603IMSTRT 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：MSOP
包装说明：ROHS COMPLIANT, MSOP-10针数：10
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.8
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：2.25 V
标称输入电压：3.3 VJESD-30 代码：S-PDSO-G10
JESD-609代码：e3长度：3 mm
湿度敏感等级：1功能数量：1
端子数量：10最高工作温度：85 °C
最低工作温度：-40 °C最大输出电流：0.25 A
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
封装等效代码：TSSOP10,.19,20封装形状：SQUARE
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：1.1 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
技术：BICMOS温度等级：INDUSTRIAL
端子面层：Matte Tin (Sn)端子形式：GULL WING
端子节距：0.5 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：3 mm
Base Number Matches：1

SC4603IMSTRT 数据手册

 浏览型号SC4603IMSTRT的Datasheet PDF文件第2页浏览型号SC4603IMSTRT的Datasheet PDF文件第3页浏览型号SC4603IMSTRT的Datasheet PDF文件第4页浏览型号SC4603IMSTRT的Datasheet PDF文件第5页浏览型号SC4603IMSTRT的Datasheet PDF文件第6页浏览型号SC4603IMSTRT的Datasheet PDF文件第7页 
SC4603  
Very Low Input, MHz Operation,  
High Efficiency Synchronous Buck  
POWER MANAGEMENT  
Description  
Features  
The SC4603 is a voltage mode step down (buck) regula-  
tor controller that provides accurate high efficiency power  
conversion from input supply range 2.25V to 5.5V. A high  
level of integration reduces external component count  
and makes it suitable for low voltage applications where  
cost, size and efficiency are critical.  
‹ BICMOS voltage mode PWM controller  
‹ 2.25V to 5.5V Input voltage range  
‹ Output voltages as low as 0.5V  
‹ Sleep mode (Icc = 10µA typ)  
‹ Lossless adjustable overcurrent protection  
‹ Combination pulse by pulse & hiccup mode current  
limit  
‹ High efficiency synchronous switching  
‹ 0% to 100% Duty cycle range  
‹ Synchronization to external clock  
‹ Asynchronous start-up  
‹ 1MHz frequency of operation  
‹ 10-Pin MSOP surface mount package  
The SC4603 drives external complementary power  
MOSFETs; P-channel on the high side and N-channel on  
the low side. The use of high side P-channel MOSFETs  
eliminates the need for an external charge pump and  
simplifies the high side gate driver. Non-overlap protec-  
tion is provided for the gate drive signals to prevent shoot  
through of the MOSFET pair. The voltage drop across the  
P-channel MOSFET during its conduction is sensed for  
lossless short circuit current limiting.  
Applications  
‹ Distributed power architecture  
‹ Servers/workstations  
A low power sleep mode can be achieved by forcing the  
SYNC/SLEEP pin below 0.8V. A synchronous mode of op-  
eration is activated as the SYNC/SLEEP pin is driven by  
an external clock. The quiescent supply current in sleep  
mode is typically lower than 10µA. A 1.7ms soft start is  
internally provided to prevent output voltage overshoot  
during start-up. A 100% maximum duty cycle allows the  
SC4603 to operate as a low dropout regulator in the  
event of a low battery condition.  
‹ Local microprocessor core power supplies  
‹ DSP and I/O power supplies  
‹ Battery powered applications  
‹ Telecommunication equipment  
‹ Data processing applications  
The SC4603 is an ideal choice for 3.3V, 5V or other low  
input supply systems. It’s available in 10 pin MSOP  
package.  
Typical Application Circuit  
R15  
Vin = 2.25V ~ 5.5V  
1
C14  
C10  
22u  
C11  
22u  
C12  
C13  
R3  
M1  
RT  
33n  
22u  
22u  
U1  
34.8k  
5
1
2
3
4
6
FS  
ISET  
PDRV  
PHASE  
NDRV  
GND  
R6  
1.0  
4.7u  
C3  
10  
7
VCC  
L1  
2.3u  
Vout = 1.5V (as low as 0.5V * ) /6A  
SYNC  
COMP  
VSENSE  
9
C9  
C1  
150p  
M2  
C7  
150u  
C4  
8
1.2n  
R1  
C2  
1n  
R5  
1.0  
22u  
R7  
14k  
SC4603  
R8  
806  
20k  
R9  
6.98k  
* External components can be modified to provide a Vout as low as 0.5V.  
Revision: May 5, 2004  
1
www.semtech.com  
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