MIC2196 Datasheet, PDF (1/11 Pages) Micrel Semiconductor – 400kHz SO-8 Boost Control IC

MIC2196
MIC2196
400kHz SO-8 Boost Control IC
Final Information
Micrel
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.
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
V_IN
5V
47µF
16V
1µF
10nF
Si4884
4.7µH _(×2)
MIC2196BM
VIN OUTN
EN/
CS
UVLO
0.01Ω
VDD GND
10k _{COMP FB}
B530
10k
1.15k
V_OUT
12V, 3A
120µF
20V
(×3)
Adjustable Output Boost Converter
MIC2196
5V to 12V Efficiency
100
95
90
85
80
75
70
65
60
55
V_IN = 5V
500 _{0.5 1 1.5 2 2.5 3 3.5 4}
OUTPUT CURRENT (A)
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com
August 2004
1
MIC2196