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MIC4576BT PDF预览

MIC4576BT

更新时间: 2024-12-01 12:10:31
品牌 Logo 应用领域
麦瑞 - MICREL 稳压器开关式稳压器或控制器电源电路开关式控制器信息通信管理局域网
页数 文件大小 规格书
7页 74K
描述
200kHz Simple 3A Buck Voltage Regulator

MIC4576BT 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
包装说明:TO-220, SIP5,.1,67TBReach Compliance Code:not_compliant
风险等级:5.29模拟集成电路 - 其他类型:SWITCHING REGULATOR
控制模式:VOLTAGE-MODE控制技术:PULSE WIDTH MODULATION
最大输入电压:36 V最小输入电压:8 V
标称输入电压:12 VJESD-30 代码:R-PSFM-T5
JESD-609代码:e0功能数量:1
端子数量:5最高工作温度:85 °C
最低工作温度:-40 °C最大输出电流:8.5 A
标称输出电压:1.23 V封装主体材料:PLASTIC/EPOXY
封装代码:TO-220封装等效代码:SIP5,.1,67TB
封装形状:RECTANGULAR封装形式:FLANGE MOUNT
峰值回流温度(摄氏度):240认证状态:Not Qualified
子类别:Switching Regulator or Controllers最大供电电流 (Isup):10 mA
表面贴装:NO切换器配置:BUCK
最大切换频率:220 kHz技术:BICMOS
温度等级:INDUSTRIAL端子面层:Tin/Lead (Sn85Pb15)
端子形式:THROUGH-HOLE端子节距:1.7 mm
端子位置:SINGLE处于峰值回流温度下的最长时间:30
Base Number Matches:1

MIC4576BT 数据手册

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MIC4576  
200kHz Simple 3A Buck Voltage Regulator  
General Description  
Features  
The MIC4576 is a series of easy to use fixed and adjustable  
BiCMOS step-down (buck) switch-mode voltage regulators.  
The 200kHz MIC4576 duplicates the pinout and function of  
the 52kHz LM2576. The higher switching frequency may  
allow up to a 2:1 reduction in output filter inductor size.  
• Fixed 200kHz operation  
• 3.3V, 5V, and adjustable output versions  
• Voltage over specified line and load conditions:  
Fixed version: ±3% max. output voltage  
Adjustable version: ±2% max. feedback voltage  
• Guaranteed 3A switch current  
• Wide 4V to 36V input voltage range  
• Wide 1.23V to 33V output voltage range  
• Requires minimum external components  
• < 200µA typical shutdown mode  
The MIC4576 is available in 3.3V, and 5V fixed output  
versions or a 1.23V to 33V adjustable output version. Both  
versions are capable of driving a 3A load with excellent line  
and load regulation.  
The feedback voltage is guaranteed to ±2% tolerance for  
adjustable versions, and the output voltage is guaranteed to  
±3% for fixed versions, within specified voltages and load  
conditions. The oscillator frequency is guaranteed to ±10%.  
• 75% efficiency (adjustable version > 75% typical)  
• Standard inductors are 25% of typical LM2576 values  
• Thermal shutdown  
• Overcurrent protection  
In shutdown mode, the regulator draws less than 200µA  
standby current. The regulator performs cycle-by-cycle  
current limiting and thermal shutdown for protection under  
fault conditions.  
• 100% electrical thermal limit burn-in  
Applications  
• Simple high-efficiency step-down (buck) regulator  
• Efficient preregulator for linear regulators  
• On-card switching regulators  
• Positive-to-negative converter (inverting buck-boost)  
• Battery Charger  
• Negative boost converter  
This series of simple switch-mode regulators requires a  
minimum number of external components and can operate  
using a standard series of inductors. Frequency compensa-  
tion is provided internally.  
The MIC4576 is available in TO-220 (T) and TO-263 (U)  
packages for the industrial temperature range.  
• Step-down to 3.3V for Intel Pentium™  
and similar microprocessors  
Typical Applications  
L1  
5V/3A  
5
1
2
Shutdown  
Enable  
SHDN  
MIC4576-5.0BT  
VIN FB  
SW  
33µH  
8V to 36V  
4
C2  
1000µF  
16V  
C1  
470µF  
63V  
GND  
D1  
3
MBR360  
Fixed Regulator  
L1  
68µH  
12V/3A  
C2  
1000µF  
16V  
5
1
2
4
Shutdown  
Enable  
SHDN  
SW  
FB  
R2  
MIC4576BT  
13.0k  
1%  
16V to 36V  
VIN  
C1  
470µF  
63V  
GND  
3
R1  
1.50k  
1%  
MBR360  
Adjustable Regulator  
MIC4576  
4-128  
April 1998•  

MIC4576BT 替代型号

型号 品牌 替代类型 描述 数据表
MIC4576WT MICROCHIP

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