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SC4605IMSTRT PDF预览

SC4605IMSTRT

更新时间： 2024-11-23 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
19页 423K
描述
Low Input, High Efficiency Synchronous, Step Down Controller

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中文翻译

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SC4605IMSTRT 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-10针数：10
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：2.8 V
标称输入电压：5 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：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：600 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

SC4605IMSTRT 数据手册

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SC4605  
Low Input, High Efficiency  
Synchronous, Step Down Controller  
POWER MANAGEMENT  
Description  
Features  
‹ BICMOS voltage mode PWM controller  
‹ 2.8V to 5.5V Input voltage range  
‹ Output voltages as low as 0.8V  
‹ +/-1% Reference accuracy  
‹ Sleep mode (Icc = 10µA typ)  
‹ Lossless adjustable short circuit current limiting  
‹ Combination pulse by pulse & hiccup mode  
current limit  
The SC4605 is a voltage mode step down (buck) regula-  
tor controller that provides accurate high efficiency power  
conversion from a input supply range of 2.8V 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.  
The SC4605 drives external N-channel MOSFETs with 1A  
peak current. A non-overlap protection is provided for  
the gate drive signals to prevent shoot through of the  
MOSFET pair. The voltage drop across the high side  
MOSFET during its conduction is sensed for lossless short  
circuit current limiting.  
‹ High efficiency synchronous switching  
‹ 0% to 97% Duty cycle range  
‹ 1A Peak current driver  
‹ 10-Pin MSOP package  
The quiescent supply current in sleep mode is typically Applications  
lower than 10µA. A 1.8ms soft start is internally provided  
to prevent output voltage overshoot during start-up.  
‹ Distributed power architecture  
‹ Servers/workstations  
‹ Local microprocessor core power supplies  
‹ DSP and I/O power supplies  
‹ Battery powered applications  
‹ Telecommunications equipment  
‹ Data processing applications  
The SC4605 is an ideal choice for 3.3V, 5V or other low  
input supply systems. It’s available in 10 pin MSOP pack-  
age.  
Typical Application Circuit  
Vin = 2.8V - 5.5V  
C10  
C11  
D2  
C12  
1u  
C71  
22u  
22u  
220u  
M1  
M2  
C14  
0.1u  
R13  
1
R3  
U1  
1
2
3
4
5
10  
9
BST  
DRVH  
PHASE  
DRVL  
L1  
C3  
4.7u  
Vout = 1.5V (as low as 0.8V * ) / 12A  
VCC  
ISET  
COMP  
1.8u  
8
7
C6  
C5  
C4  
GND  
C9  
4.7n  
C20  
2.2n  
6
C2  
22u  
C1  
330u  
22u  
R7  
FS/SYNC  
VSENSE  
10k  
470pF  
180p  
R8  
SC4605  
200  
R1  
14.3k  
R9  
11.5k  
* External components can be modified to provide a Vout as low as 0.8V.  
Revision: October 14, 2004  
1
www.semtech.com  
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中文翻译

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