参数资料
型号: MIC2141YM5 TR
厂商: Micrel Inc
文件页数: 1/16页
文件大小: 0K
描述: IC REG BOOST ADJ 10MA SOT23-5
标准包装: 1
类型: 升压(升压)
输出类型: 可调式
输出数: 1
输出电压: 4.8 V ~ 22 V
输入电压: 2.5 V ~ 14 V
频率 - 开关: 330kHz
电流 - 输出: 10mA
同步整流器:
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: SC-74A,SOT-753
包装: 标准包装
供应商设备封装: SOT-23-5
产品目录页面: 1091 (CN2011-ZH PDF)
其它名称: 576-2597-6
MIC2141
Micropower Boost Converter
General Description
The MIC2141 is a micropower boost switching regulator
that can operate from 3- or 4-cell nickel-metal-hydride
batteries or a single Li-ion cell. This regulator employs a
constant 330kHz, fixed 18% duty-cycle, gated-oscillator
architecture.
The MIC2141 can be used in applications where the
output voltage must be dynamically adjusted. The device
features a control signal input which is used to
proportionally adjust the output voltage. The control signal
input has a gain of 6, allowing a 0.8V to 3.6V control signal
to vary a 4.8V to 22V output.
The MIC2141 requires only three external components to
operate and is available in a tiny 5-pin SOT-23 package for
space and power-sensitive portable applications. The
MIC2141 draws only 70μA of quiescent current and can
Features
? Implements low-power boost, SEPIC, or flyback
? 2.2V to 14V input voltage
? 330kHz switching frequency
? <2μA shutdown current
? 70μA quiescent current
? 1.24V bandgap reference
? Typical output current 1mA to 10mA
? SOT23-5 package
Applications
? LCD bias supply
? CCD digital camera supply
operate with an efficiency exceeding 85%.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
___________________________________________________________________________________________________________
Typical Application
10μH
Control Voltage
V C *
(from DAC)
1
2
3
MIC2141
5
4
Variable
V OUT
10μF
4.0
3.5
3.0
2.5
2.0
1.5
1.0
vs. Output Voltage
0.5
0
0
5
10 15
20
25
V OUT (V)
DAC-Controlled LCD Bias Voltage Supply
Micrel Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel +1 ( 408 ) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com
December 2006
1
M9999-122006
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