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| 型号： | MIC2145YMM TR |
| 厂商： | Micrel Inc |
| 文件页数： | 1/15页 |
| 文件大小： | 0K |
| 描述： | IC REG BST FLYBK SEPIC ADJ 8MSOP |
| 标准包装： | 1 |
| 类型： | 升压（升压），回扫，Sepic |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 3 V ~ 16 V |
| 输入电压： | 2.4 V ~ 16 V |
| 频率 - 开关： | 450kHz |
| 电流 - 输出： | 500mA |
| 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： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 包装： | 标准包装 |
| 供应商设备封装： | 8-MSOP |
| 产品目录页面： | 1091 (CN2011-ZH PDF) |
| 其它名称： | 576-1540-6 |
MIC2145
General Description
Micrel, Inc.
MIC2145
High Efficiency 2.5W Boost Converter
Features
The MIC2145 is a small size boost switching regulator that
can provide over 2.5W of output power. The input voltage
range is between 2.4V to 16V, making the device suitable for
one-cell Li-Ion and 3- to 4-cell alkaline/NiCad/NiMH applica-
tions. The output voltage of the MIC2145 can be adjusted up
to 16V.
?
?
?
?
?
?
2.4V to 16V input voltage
Output adjustable to 16V
Programmable peak current limit
Soft start
Up to 450kHz switching frequency
0.5 μ A shutdown current
The MIC2145 is well suited for portable, space-sensitive
applications. Its typical 450kHz operation allows small sur-
face mount external components to be used. The MIC2145
has a low quiescent current of 200 μ A, and a typical shutdown
current of 0.5 μ A. The MIC2145 is capable of high efficiencies
in a small board area.
The MIC2145 features a low-on resistance internal switch
? 200 μ A quiescent current
? Capable of 5V/ 500mA output with 3.3V input
? Achieves over 85% efficiency
? Implements low power BOOST, SEPIC, and FLYBACK
topologies
? MSOP-8 and 3mm × 3mm MLF?-10L
Applications
that allows it to provide over 2.5W of output power. The peak
switch current can be programmed through an external
resistor. This allows the user to set the peak switch current at
the level where maximum efficiency occurs. It also allows the
user to further optimize for efficiency and inductor size by
setting the peak current below the level of inductor saturation.
?
?
?
?
?
Flash LED driver
LCD bias supply
White LED driver
DSL bias supply
Local 3V to 5V conversion
The MIC2145 is available in an MSOP-8 and 3mm × 3mm
MLF?-10L package with an ambient operating temperature
range from –40 ° C to +85 ° C.
Ordering Information
Part Number
Voltage
Ambient
Standard Pb-Free
Temp. Range
Package
MIC2145BMM
MIC2145BML
MIC2145YMM
MIC2145YML
Adj
Adj
–40 ° C to +85 ° C
–40 ° C to +85 ° C
8-lead MSOP
10-lead MLF?
Typical Application
V IN
3.0V to 5.0V
L1
10 μ H
90
10V Output
Efficiency
C IN
10 μ F/6.3V
1
EN
SW
5
D1
V OUT
10V/150mA
85
4
PGND VDD
MIC2145BMM
6
C OUT
10 μ F/16V
80
75
10
I Limit
3
2
RSET
SS
FB
SGND
7
8
70
65
60
V IN = 3.0V
100 1000
OUTPUT CURRENT (mA)
Adjustable Output Boost Converter with Programmable Peak Switch Current
MLF and Micro LeadFrame are trademarks of Amkor Technologies, 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
April 2005
1
M9999-042205
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