MIC2196 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 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 allceramic
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 1A 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.
MIC2196 Maximum Ratings
Supply Voltage (VIN) .....................................................15V
Digital Supply Voltage (VDD) ...........................................7V
Comp Pin Voltage (VCOMP) ............................ 0.3V to +3V
Feedback Pin Voltage (VFB) .......................... 0.3V to +3V
Enable Pin Voltage (VEN/UVLO) ..................... 0.3V to 15V
Current Sense Voltage (VCS) ......................... 0.3V to +1V
Power Dissipation (PD) ..................... 285mW @ TA = 85°C
Ambient Storage Temperature ................. 65°C to +150°C
ESD Rating, Note3 ....................................................... 2kV
MIC2196 Features
• 2.9V to 14V input voltage range
• >90% efficiency
• 2 output driver
• 400kHz oscillator frequency
• PWM current mode control
• 0.5A micro power shutdown
• Programmable UVLO
• Front edge blanking
• Cycle-by-cycle current limiting
• Frequency foldback short-circuit protection
• 8-pin SOIC package
MIC2196 Typical Application
• 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
MIC2196 Connection Diagram
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