MIC2196

400kHz SO-8 Boost Control IC

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

September 2008

M9999-092908

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 2Ω 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 1μA

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.

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

Features

• 2.9V to 14V input voltage range

• >90% efficiency

• 2Ω output driver

• 400kHz oscillator frequency

• PWM current mode control

• 0.5μA 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

_________________________________________________________________________________________________________

Typical Application

5V

47µF

16V

4.7µH

Si4884

(x2)

10k

10nF

1µF

B530

1.15k

120µF

20V

(x3)

10k

MIC2196BM

VIN

EN/

UVLO

OUTN

CS

COMP

VDD

GND

FB

VOUT

12V, 3A

Adjustable Output Boost Converter

50

55

60

65

70

75

80

85

90

95

100

0 0.511.522.533.5 4

OUTPUT CURRENT (A)

MIC2196

5V to 12V Efficiency

V