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MIC2194

MICREL
Part Number MIC2194
Manufacturer MICREL
Description 400kHz SO-8 Buck Controller
Published Mar 10, 2011
Detailed Description MIC2194 Micrel MIC2194 400kHz SO-8 Buck Control IC General Description Micrel’s MIC2194 is a high efficiency PWM buck...
Datasheet PDF File MIC2194 PDF File

MIC2194
MIC2194

Overview
MIC2194 Micrel MIC2194 400kHz SO-8 Buck Control IC General Description Micrel’s MIC2194 is a high efficiency PWM buck control IC housed in the SO-8 package.
Its 2.
9V to 14V input voltage range allows it to efficiently step down voltages in 3.
3V, 5V, and 12V systems as well as 1- or 2-cell Li Ion battery powered applications.
The flexible architecture of the MIC2194 allows for it to be configured as a buck or a buck-boost converter.
The MIC2194 solution saves valuable board space.
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 MIC2194 can implement allceramic capacitor solutions.
The MIC2194 drives a high-side P-channel MOSFET.
A low output driver impedance of 2Ω allows the MIC2194 to drive large external MOSFETs to generate a wide range of output currents.
The MIC2194 can achieve maximum duty cycles of 100%, which can be useful in low headroom applications.
The MIC2194 is available in an 8 pin SOIC package with a junction temperature range of –40°C to +125°C.
Features • • • • • • • • • • • • • • • • • • • • 2.
9V to 14V input voltage range 400kHz oscillator frequency PWM current mode control 2Ω output drivers 100% maximum duty cycle 0.
5µA micro-power shutdown Programmable UVLO Front edge blanking Cycle-by-cycle current limiting Frequency foldback short circuit protection 8-lead SOIC package Point of load power supplies Negative voltage buck-boost power supplies Distributed power systems Base stations Wireless modems ADSL line cards Servers Step down conversion in 3.
3V, 5V, 12V systems 1-and 2-cell Li Ion battery operated equipment Applications Typical Application VIN 12V 47µF 20V (×2) 0.
012Ω MIC2194BM VIN CS EN/ OUTP UVLO VDD FB 2k 2.
2nF COMP GND 3.
32k Si4431A (×2) 5.
2µH B530 10k VOUT 5V, 5A 1µF 220µF 10V (×2) Adjustable Output Buck Converter VIN +3.
3V 10µF 16V 0.
040Ω MIC2194BM VIN CS EN/ OUTP UVLO VDD FB 4.
...


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