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MIC2168A PDF预览

MIC2168A

更新时间: 2024-01-30 03:18:01
品牌 Logo 应用领域
麦瑞 - MICREL /
页数 文件大小 规格书
14页 822K
描述
1MHz PWM Synchronous Buck Control IC

MIC2168A 技术参数

是否Rohs认证: 符合生命周期:Active
包装说明:TSSOP,Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.7其他特性:ALSO HAS OUTPUT VOLTAGE ADJUSTABLE DOWN TO 0.8V
模拟集成电路 - 其他类型:SWITCHING CONTROLLER控制模式:VOLTAGE-MODE
控制技术:PULSE WIDTH MODULATION最大输入电压:14.5 V
最小输入电压:3 V标称输入电压:5 V
JESD-30 代码:S-PDSO-G10JESD-609代码:e4
长度:3 mm湿度敏感等级:2
功能数量:1端子数量:10
最高工作温度:125 °C最低工作温度:-40 °C
标称输出电压:5 V封装主体材料:PLASTIC/EPOXY
封装代码:TSSOP封装形状:SQUARE
封装形式:SMALL OUTLINE, THIN PROFILE, SHRINK PITCH峰值回流温度(摄氏度):260
认证状态:Not Qualified座面最大高度:1.1 mm
表面贴装:YES切换器配置:PUSH-PULL
最大切换频率:1100 kHz温度等级:AUTOMOTIVE
端子面层:Nickel/Palladium/Gold (Ni/Pd/Au)端子形式:GULL WING
端子节距:0.5 mm端子位置:DUAL
处于峰值回流温度下的最长时间:40宽度:3 mm
Base Number Matches:1

MIC2168A 数据手册

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MIC2168A  
1MHz PWM Synchronous Buck Control IC  
General Description  
Features  
TheMIC2168Aisahigh-efficiency, simpletouse1MHzPWM  
synchronous buck control IC housed in a small MSOP-10  
package. The MIC2168A allows compact DC/DC solutions  
with a minimal external component count and cost.  
• 3V to 14.5V input voltage range  
• Adjustable output voltage down to 0.8V  
• Up to 95% efficiency  
• 1MHz PWM operation  
• Adjustable current-limit senses high-side N-Channel  
MOSFET current  
• No external current sense resistor  
• Adaptive gate drive increases efficiency  
• Ultra-fast response with hysteretic transient recovery  
mode  
• Overvoltage protection protects the load in fault  
conditions  
• Dual mode current limit speeds up recovery time  
• Hiccup mode short-circuit protection  
• Internal soft-start  
The MIC2168A operates from a 3V to 14.5V input, without  
the need of any additional bias voltage. The output voltage  
can be precisely regulated down to 0.8V. The adaptive all  
N-Channel MOSFET drive scheme allows efficiencies over  
95% across a wide load range.  
The MIC2168A senses current across the high-side N-  
Channel MOSFET, eliminating the need for an expensive  
and lossy current-sense resistor. Current limit accuracy is  
maintained by a positive temperature coefficient that tracks  
theincreasingR  
oftheexternalMOSFET. Furthercost  
DS(ON)  
and space are saved by the internal in-rush-current limiting  
digital soft-start.  
• Dual function COMP and EN pin allows low-power shut-  
down  
• Small size MSOP 10-lead package  
The MIC2168A is available in a 10-pin MSOP package, with  
a wide junction operating range of –40°C to +125°C.  
Applications  
• Point-of-load DC/DC conversion  
• Set-top boxes  
All support documentation can be found on Micrel’s web site  
at www.micrel.com.  
• Graphic cards  
• LCD power supplies  
Telecom power supplies  
• Networking power supplies  
• Cable modems and routers  
Typical Application  
VIN = 5V  
SD103BWS  
100µF  
MIC2168 Efficiency  
100  
4.7µF  
95  
90  
85  
80  
75  
0.1µF  
1kΩ  
VDD  
BST  
CS  
IRF7821  
1.2µH  
VIN  
HSD  
3.3V  
MIC2168A  
2Ω  
70  
VSW  
65  
COMP/EN  
1000nF  
10kΩ  
IRF7821  
VIN = 5V  
60  
55  
50  
100pF  
100nF  
LSD  
FB  
VOUT = 3.3V  
150µF x 2  
4kΩ  
GND  
3.24kΩ  
0
2
4
6
8
10  
ILOAD (A)  
MIC2168A Adjustable Output 1MHz Converter  
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com  
M9999-062205  
April 2005  
1

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