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SC4602AIMSTR PDF预览

SC4602AIMSTR

更新时间： 2024-11-23 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
18页 354K
描述
High Efficiency Synchronous, Step Down Controller

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中文翻译

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SC4602AIMSTR 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Obsolete零件包装代码：TSSOP
包装说明：MO-187AA, MSOP-8针数：8
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.91
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：2.75 V
标称输入电压：3.3 VJESD-30 代码：S-PDSO-G8
JESD-609代码：e0长度：3 mm
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：0.25 A封装主体材料：PLASTIC/EPOXY
封装代码：TSSOP封装等效代码：TSSOP8,.19
封装形状：SQUARE封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：NOT SPECIFIED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：450 kHz技术：BICMOS
温度等级：INDUSTRIAL端子面层：TIN LEAD
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：3 mmBase Number Matches：1

SC4602AIMSTR 数据手册

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SC4602A/B  
High Efficiency Synchronous,  
Step Down Controller  
POWER MANAGEMENT  
Description  
Features  
‹ BICMOS Voltage mode PWM controller  
‹ 2.75V to 5.5V Input voltage range  
‹ Output voltages as low as 0.8V  
‹ +/-1% Reference accuracy  
The SC4602A/B is a voltage mode step down (buck) regu-  
lator controller that provides accurate high efficiency  
power conversion from an input supply range of 2.75V  
to 5.5V. A high level of integration reduces external com-  
ponent count and makes it suitable for low voltage appli-  
cations where cost, size and efficiency are critical.  
‹ Sleep Mode (Icc = 10µA typ)  
‹ Lossless short circuit current limiting  
‹ Combination pulse by pulse & hiccup mode current  
limit  
‹ High efficiency synchronous switching  
‹ Up to 100% Duty cycle range  
‹ Synchronization to external clock  
‹ 8-Pin MSOP surface mount package. Lead-free pack-  
age available, fully WEEE and RoHS compliant  
The SC4602A/B 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 MOSFET  
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. Voltage drop across the P-  
channel MOSFET during its conduction is sensed for  
lossless short circuit current limiting.  
Applications  
‹ Distributed power system  
‹ RF power supply  
‹ Local microprocessor core power supplies  
‹ DSP and I/O power supplies  
‹ Battery powered applications  
‹ Servers and 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 soft start (2.4ms for  
the SC4602A and 1.2ms for the SC4602B) is internally  
provided to prevent output voltage overshoot during start-  
up. A 100% maximum duty cycle allows the SC4602A/B  
to operate as a low dropout regulator in the event of a  
low battery condition. The SC4602A/B has fixed switch-  
ing frequency (300KHz for the SC4602A and 550KHz  
for the SC4602B).  
The SC4602A/B is an ideal choice for 3.3V, 5V or other  
low input supply sytems. It’s available in a 8 pin MSOP  
package.  
Typical Application Circuit  
R15  
1
Vin = 2.75V ~ 5.5V  
C10  
22u  
C11  
C12  
C13  
M1  
M2  
22u  
22u  
22u  
U1  
R6  
1.0  
1
2
3
4
8
7
6
5
VCC  
PDRV  
L1  
C3  
Vo = 1.5V (as low as 0.8V )/6A  
SYNC/SLEEP NDRV  
4.7u  
1.6u  
COMP  
GND  
C9  
C7  
150u  
C4  
22u  
VSENSE  
PHASE  
3.3n  
C2  
R5  
1.0  
C1  
R7  
SC4602B  
4.64k  
6.8n  
470p  
R8  
R1  
5.11k  
169  
R9  
5.36k  
* External components can be modified to provide a VOUT as low as 0.8V.  
Revision: January 20, 2006  
1
www.semtech.com  
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