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| 型号： | MIC4576BU TR |
| 厂商： | Micrel Inc |
| 文件页数： | 1/8页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 3A TO263-5 |
| 标准包装： | 750 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.23 V ~ 33 V |
| 输入电压： | 4 V ~ 36 V |
| 频率 - 开关： | 200kHz |
| 电流 - 输出： | 3A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-263-6，D²Pak（5 引线+接片），TO-263BA |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | TO-263-5 |
| 其它名称： | MIC4576BUTR |
MIC4576
General Description
The MIC4576 is a series of easy to use ?xed 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 ?lter inductor size.
The MIC4576 is available in 3.3V, and 5V ?xed output ver-
sions 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 ?xed versions, within speci?ed voltages and load con-
ditions. The oscillator frequency is guaranteed to ±10%.
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.
This series of simple switch-mode regulators requires a mini-
mum number of external components and can operate using
a standard series of inductors. Frequency compensation is
provided internally.
The MIC4576 is available in TO-220 (T) and TO-263 (U)
packages for the industrial temperature range.
Micrel, Inc.
MIC4576
200kHz Simple 3A Buck Regulator
Features
? Fixed 200kHz operation
? 3.3V, 5V, and adjustable output versions
? Voltage over speci?ed 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
? 75% ef?ciency (adjustable version > 75% typical)
? Standard inductors are 25% of typical LM2576 values
? Thermal shutdown
? Overcurrent protection
? 100% electrical thermal limit burn-in
Applications
? Simple high-ef?ciency step-down (buck) regulator
? Ef?cient preregulator for linear regulators
? On-card switching regulators
? Positive-to-negative converter (inverting buck-boost)
? Battery Charger
? Negative boost converter
? Step-down to 3.3V for Intel Pentium?
and similar microprocessors
Typical Applications
Shutdown
Enable
8V to 36V
C1
470μF
63V
5
1
SHDN SW
MIC4576-5.0WT
V IN FB
GND
3
2
4
L1
33μH
D1
MBR360
5V/3A
C2
1000μF
16V
Fixed Regulator
Shutdown
Enable
16V to 36V
C1
470μF
63V
5
1
SHDN SW
MIC4576WT
V IN FB
GND
3
2
4
L1
68μH
MBR360
R2
13.0k
1%
R1
1.50k
1%
12V/3A
C2
1000μF
16V
Adjustable Regulator
Micrel, Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel + 1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com
March 2006
1
MIC4576
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC4576WT | 功能描述:直流/直流开关调节器 200kHz 3.0A Step-down Regulator (ROHS Compliant) RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MIC4576WU | 功能描述:直流/直流开关调节器 200kHz 3.0A Step-down Regulator (ROHS Compliant) RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MIC4576WU TR | 功能描述:直流/直流开关调节器 200kHz 3.0A Step-down Regulator (ROHS Compliant) RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MIC4576WUTR | 制造商:Micrel 功能描述:Conv DC-DC Single Step Down 4V to 36V |
| MIC4576WU-TR | 功能描述:Buck Switching Regulator IC Positive Adjustable 1.23V 1 Output 3A TO-263-6, D2Pak (5 Leads + Tab), TO-263BA 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:有效 功能:降压 输出配置:正 拓扑:降压 输出类型:可调式 输出数:1 电压 - 输入（最小值）:4V 电压 - 输入（最大值）:36V 电压 - 输出（最小值/固定）:1.23V 电压 - 输出（最大值）:33V 电流 - 输出:3A 频率 - 开关:200kHz 同步整流器:无 工作温度:-40°C ~ 85°C（TA） 安装类型:表面贴装 封装/外壳:TO-263-6，D2Pak（5 引线+接片），TO-263BA 供应商器件封装:TO-263-5 标准包装:1 |
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