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MIC4576-3.3BU PDF预览

MIC4576-3.3BU

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
页数 文件大小 规格书
7页 74K
描述
200kHz Simple 3A Buck Voltage Regulator

MIC4576-3.3BU 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
包装说明:TO-263, SMSIP5H,.6,67TBReach Compliance Code:not_compliant
风险等级:5.69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:6 V
标称输入电压:12 VJESD-30 代码:R-PSSO-G5
JESD-609代码:e0长度:10.287 mm
湿度敏感等级:3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:3.3 V封装主体材料:PLASTIC/EPOXY
封装代码:TO-263封装等效代码:SMSIP5H,.6,67TB
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):240认证状态:Not Qualified
座面最大高度:4.8 mm子类别:Switching Regulator or Controllers
最大供电电流 (Isup):10 mA表面贴装:YES
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:GULL WING
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宽度:9.144 mm
Base Number Matches:1

MIC4576-3.3BU 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•  

MIC4576-3.3BU 替代型号

型号 品牌 替代类型 描述 数据表
LM2596S-3.3/NOPB TI

功能相似

LM2596 SIMPLE SWITCHER Power Converter 150 kHz 3A Step-Down Voltage Regulator
LM2596SX-3.3/NOPB TI

功能相似

LM2596 SIMPLE SWITCHER Power Converter 150 kHz 3A Step-Down Voltage Regulator

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