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MIC261203-ZAYJL

更新时间： 2024-01-27 19:50:46
品牌 Logo 应用领域
麦瑞 - MICREL 稳压器
页数 文件大小 规格书
28页 1396K
描述
28V, 12A Hyper Speed Control Synchronous DC/DC Buck Regulator

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MIC261203-ZAYJL 技术参数

生命周期：Active包装说明：QCCN,
Reach Compliance Code：compliantFactory Lead Time：15 weeks
风险等级：5.72模拟集成电路 - 其他类型：SWITCHING REGULATOR
最大输入电压：28 V最小输入电压：4.5 V
标称输入电压：12 VJESD-30 代码：R-XQCC-N28
长度：6 mm功能数量：1
端子数量：28最高工作温度：125 °C
最低工作温度：-40 °C封装主体材料：UNSPECIFIED
封装代码：QCCN封装形状：RECTANGULAR
封装形式：CHIP CARRIER座面最大高度：0.9 mm
表面贴装：YES切换器配置：BUCK
最大切换频率：750 kHz温度等级：AUTOMOTIVE
端子形式：NO LEAD端子位置：QUAD
宽度：5 mmBase Number Matches：1

MIC261203-ZAYJL 数据手册

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MIC261203-ZA  
28V, 12A Hyper Speed Control  
Synchronous DC/DC Buck Regulator  
SuperSwitcher II  
General Description  
Features  
The Micrel MIC261203-ZA is  
a
constant-frequency,  
• Hyper Speed Control architecture enables  
− High Delta V operation (VIN = 28V and VOUT = 0.6V)  
− Small output capacitance  
synchronous buck regulator featuring a unique adaptive  
on-time control architecture. The MIC261203-ZA operates  
over an input supply range of 4.5V to 28V and provides a  
regulated output of up to 12A of output current. The output  
voltage is adjustable down to 0.6V with a guaranteed  
accuracy of ±1%, and the device operates at a switching  
frequency of 600kHz.  
• 4.5V to 28V voltage input  
• 12A output current capability, up to 95% efficiency  
• Adjustable output from 0.6V to 5.5V  
• ±1% feedback accuracy  
Micrel’s Hyper Speed Controlarchitecture allows for  
• Any Capacitorstable - zero-to-high ESR  
• 600kHz switching frequency  
• No external compensation  
ultra-fast transient response while reducing the output  
capacitance and also makes (High VIN)/(Low VOUT  
)
operation possible. This adaptive tON ripple control  
architecture combines the advantages of fixed-frequency  
operation and fast transient response in a single device.  
• Power Good (PG) output  
• Foldback current-limit and “hiccup mode” short-circuit  
protection  
The MIC261203-ZA offers a full suite of features to ensure  
protection of the IC during fault conditions. These include  
undervoltage lockout to ensure proper operation under  
power-sag conditions, internal soft-start to reduce inrush  
current, foldback current limit, “hiccup mode” short-circuit  
protection, and thermal shutdown. An open-drain Power  
Good (PG) pin is provided.  
• Supports safe startup into a pre-biased load  
• –40°C to +125°C junction temperature range  
• 28-pin 5mm × 6mm QFN package  
Applications  
• Distributed power systems  
• Communications/networking infrastructure  
• Set-top box, gateways and routers  
Datasheets and support documentation are available on  
Micrel’s web site at: www.micrel.com.  
• Printers, scanners, graphic cards and video cards  
Typical Application  
Efficiency (VIN = 12V)  
vs. Output Current  
100  
95  
5.0V  
3.3V  
2.5V  
1.8V  
1.5V  
1.2V  
1.0V  
0.9V  
0.8V  
90  
85  
80  
75  
70  
65  
60  
55  
50  
VIN = 12V  
12  
0
3
6
9
15  
OUTPUT CURRENT (A)  
Hyper Speed Control, SuperSwitcher II, and Any Capacitor are trademarks of Micrel, Inc.  
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com  
Revision 1.0  
June 11, 2013  
1234567...28

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