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SC4607IMSTRT PDF预览

SC4607IMSTRT

更新时间： 2024-11-26 04:05:23
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
17页 319K
描述
Very Low Input, MHz Operation, High Efficiency Synchronous Buck

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SC4607IMSTRT 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：MO-187BA, MSOP-8针数：8
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.81
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-G8
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：8最高工作温度：85 °C
最低工作温度：-40 °C最大输出电流：1 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：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

SC4607IMSTRT 数据手册

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SC4607  
Very Low Input, MHz Operation,  
High Efficiency Synchronous Buck  
POWER MANAGEMENT  
Description  
Features  
The SC4607 is a voltage mode step down (buck) regula-  
tor controller that provides accurate high efficiency power  
conversion from an input supply range of 2.25V to 5.5V.  
The SC4607 is capable of producing an output voltage  
as low as 0.5V and has a maximum duty cycle of 97%. A  
high level of integration reduces external component  
count, and makes it suitable for low voltage applications  
where cost, size, and efficiency are critical.  
‹ Asynchronous start up  
‹ BiCMOS voltage mode PWM controller  
‹ Operation of frequency to 1MHz  
‹ 2.25V to 5.5V input voltage range  
‹ Output voltages as low as 0.5V  
‹ +/-1% reference accuracy  
‹ Sleep mode (Icc = 10µA typ)  
‹ Adjustable lossless short circuit current limiting  
‹ Combination pulse by pulse & hiccup mode  
current limit  
The SC4607 drives external, N-channel MOSFETs with a  
peak gate current of 1A. The SC4607 prevents shoot  
through currents by offering nonoverlap protection for  
the gate drive signals of the external MOSFETs. The  
SC4607 features lossless current sensing of the voltage  
drop across the drain to source resistance of the high  
side MOSFET during its conduction period.  
‹ High efficiency synchronous switching  
‹ Up to 97% duty cycle  
‹ 1A peak current driver  
‹ 10-pin MSOP package  
Applications  
‹ Distributed power architecture  
The quiescent supply current in sleep mode is typically  
lower than 10µA. A 1.2ms soft start is internally provided ‹ Servers/workstations  
to prevent output voltage overshoot during start-up.  
‹ Local microprocessor core power supplies  
‹ DSP and I/O power supplies  
The SC4607 is an ideal choice for converting 2.5V, 3.3V,  
5V or other low input supply voltages. It’s available in 10  
pin MSOP package  
‹ Battery-powered applications  
‹ Telecommunications equipment  
‹ Data processing applications  
Typical Application Circuit  
Vin = 2.25V - 5.5V  
C10  
C11  
C12  
D2  
1u  
22u  
22u  
C71  
220u  
M1  
M2  
R13  
1
C14  
0.1u  
R6  
0
R3  
U1  
1
2
3
4
5
10  
9
BST  
DRVH  
PHASE  
DRVL  
GND  
L1  
C3  
4.7u  
Vout = 1.5V (as low as 0.5V * ) / 12A  
VCC  
ISET  
COMP  
1.8u  
8
7
C6  
C5  
C4  
C9  
4.7n  
C20  
560pF  
2.2n  
6
22u  
C2  
330u  
C1  
22u  
R7  
FS/SYNC VSENSE  
R5  
0
10k  
180p  
R8  
SC4607  
200  
R1  
14.3k  
R9  
4.99k  
*External components can be modified to provide a Vout as low as 0.5V  
Revision: June 1, 2005  
1
www.semtech.com  
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