August 2004

1

MIC2196

MIC2196

Micrel

MIC2196

400kHz SO-8 Boost Control IC

Final Information

General Description

Micrel’s MIC2196 is a high efficiency PWM boost control IC

housed in a SO-8 package. The MIC2196 is optimized for low

input voltage applications. With its wide input voltage range

of 2.9V to 14V, the MIC2196 can be used to efficiently boost

voltages in 3.3V, 5V, and 12V systems, as well as 1- or 2-cell

Li Ion battery powered applications. Its powerful 2

Ω output

driver allows the MIC2196 to drive large external MOSFETs.

The MIC2196 is ideal for space-sensitive applications. The

device is housed in the space-saving SO-8 package, whose

low pin-count minimizes external components. Its 400kHz

PWM operation allows a small inductor and small output

capacitors to be used. The MIC2196 can implement all-

ceramic capacitor solutions.

Efficiencies over 90% are achievable over a wide range of

load conditions with the MIC2196’s PWM boost control

scheme. Its fixed frequency PWM architecture also makes

the MIC2196 is ideal for noise-sensitive telecommunications

applications.

MIC2196 features a low current shutdown mode of 1

µA and

programmable undervoltage lockout.

The MIC2196 is available in an 8-pin SOIC package with a

junction temperature range from –40

°C to +125°C.

Typical Application

5V

47

µF

16V

4.7

µH

Si4884

(

×2)

10k

10nF

1

µF

B530

1.15k

120

µF

20V

(

×3)

10k

0.01

Ω

MIC2196BM

VIN

EN/

UVLO

OUTN

CS

COMP

VDD

GND

FB

12V, 3A

Adjustable Output Boost Converter

Features

• 2.9V to 14V input voltage range

• >90% efficiency

• 2

Ω output driver

• 400kHz oscillator frequency

• PWM current mode control

• 0.5

µA micro power shutdown

• Programmable UVLO

• Front edge blanking

• Cycle-by-cycle current limiting

• Frequency foldback short-circuit protection

• 8-pin SOIC package

Applications

• Step-up conversion in telecom/datacom systems

• SLIC power supplies

• SEPIC power supplies

• Low input voltage flyback and forward converters

• Wireless modems

• Cable modems

• ADSL line cards

• Base stations

• 1-and 2-cell Li Ion battery operated equipment

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

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OUTPUT CURRENT (A)

MIC2196

5V to 12V Efficiency

V