参数资料
| 型号： | MIC4575BU TR |
| 厂商： | Micrel Inc |
| 文件页数： | 1/15页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 1A 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 ~ 20 V |
| 输入电压： | 4 V ~ 24 V |
| 频率 - 开关： | 200kHz |
| 电流 - 输出： | 1A |
| 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： | MIC4575BUTR MIC4575BUTR-ND |
MIC4575
200kHz Simple 1A Buck Regulator
General Description
Features
The MIC4575 is a series of easy to use fixed and
adjustable BiCMOS step-down (buck) switch-mode voltage
regulators. The 200kHz MIC4575 duplicates the pinout
and function of the 52kHz LM2575. The higher switching
frequency may allow up to a 2:1 reduction in output filter
inductor size.
The MIC4575 is available in 3.3V, and 5V fixed output
versions or a 1.23V to 20V adjustable output version. Both
versions are capable of driving a 1A load with excellent
line and load regulation.
The feedback voltage is guaranteed to ±2% tolerance for
adjustable versions, and the output voltage is guaranteed
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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 1A switch current
Wide 4V to 24V input voltage range
Wide 1.23V to 20V output voltage range
Requires minimum external components
< 200μA typical shutdown mode
75% efficiency (adjustable version > 75% typical)
to ±3% for fixed versions, within specified voltages and
load conditions. 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
? Standard inductors and capacitors are25% of typical
LM2575 values
? Thermal shutdown
? Overcurrent protection
? 100% electrical thermal limit burn-in
Applications
minimum number of external components and can operate
using a standard series of inductors. Frequency comp-
ensation is provided internally.
The MIC4575 is available in TO-220 (T) and TO-263 (U)
packages for the industrial temperature range.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
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Simple high-efficiency step-down (buck) regulator
Efficient pre-regulator for linear regulators
On-card switching regulators
Positive-to-negative converter (inverting buck-boost)
Battery charger
Negative boost converter
Step-down 6V to 3.3V for Intel Pentium ? and similar
microprocessors
___________________________________________________________________________________________________________
Typical Application
Shutdown
Enable
5
SHDN
SW
2
L1
68μH
5.0V/1A
8V to 24V
C1
150μF
35V
1
MIC4575-5.0_T
V IN FB
GND
3
4
D1
1N5819
C2
330μF
16V
Fixed Regulator
Adjustable Regulator
Pentium is a registered trademark of Intel Corporation
Micrel Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel +1 ( 408 ) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com
July 2009
1
M9999-072909
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC4575WT | 功能描述:直流/直流开关调节器 200kHz 1.0A 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 |
| MIC4575WU | 功能描述:直流/直流开关调节器 200kHz 1.0A 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 |
| MIC4575WU TR | 功能描述:直流/直流开关调节器 200kHz 1.0A 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 |
| MIC4575WU-TR | 功能描述:Buck, Buck-Boost Switching Regulator IC Positive Adjustable 1.23V 1 Output 1.7A (Switch) 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:停产 功能:降压，升压/降压 输出配置:正 拓扑:降压，降压-升压 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）:24V 电压 - 输出（最小值/固定）:1.23V 电压 - 输出（最大值）:20V 电流 - 输出:1.7A（开关） 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 |
| MIC4576 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:200kHz Simple 3A Buck Voltage Regulator |
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