MIC2142BM5 Micrel Semiconductor, MIC2142BM5 Datasheet

MIC2142BM5

Manufacturer Part Number

MIC2142BM5

Description

Manufacturer

Micrel Semiconductor

Datasheets

1.MIC2142BM5.pdf (17 pages)

2.MIC2142BM5.pdf (17 pages)

Specifications of MIC2142BM5

Case

SOT-23

Date_code

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Download datasheet (414Kb)

General Description

The MIC2142 is a micropower boost switching regulator

housed in a SOT23-5 package. The input voltage range is

between 2.2V 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 MIC2142 can be adjusted

up to 22V.

The MIC2142 is well suited for portable, space-sensitive

applications. It features a low quiescent current of 85µA,

and a typical shutdown current of 0.1µA. It’s 330kHz

operation allows small surface mount external components

to be used. The MIC2142 is capable of efficiencies over

85% in a small board area.

The MIC2142 can be conﬁgured to efficiently power a

variety of loads. It is capable of providing a few mA output

for supplying low power bias voltages; it is also capable of

providing the 80mA needed to drive 4 white LEDs.

The MIC2142 is available in a SOT23-5 package with an

ambient operating temperature range from –40°C to

+85°C.

Data sheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

___________________________________________________________________________________________________________

Typical Application

2.8V to 4.7V

October 2007

10µF

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (

Typical Configuration

VCC SW

MIC2142

33µH

GND

365k

124k

+5V @60mA

22µF

OUT

Features

• 2.2V to 16V input voltage

• Up to 22V output voltage

• 330kHz switching frequency

• 0.1µA shutdown current

• 85µA quiescent current

• Implements low-power boost, SEPIC, or ﬂyback

• SOT23-5 package

Applications

• LCD bias supply

• White LED driver

• 12V Flash memory supply

• Local 3V to 5V conversion

408

) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

Micropower Boost Converter

Efficiency vs. Output Current

0.90

0.85

0.80

0.75

0.70

0.65

0.60

0.55

0.50

0.45

0.40

MIC2142

10 20 30 40 50 60 70

OUTPUT CURRENT (mA)

vs. Output Current

Efficiency

= 3.0V

= 4.2V

M9999-102507

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