Microchip Technology

The MIC2288 is a 1.2MHz pulse-width modulation (PWM), DC/DC boost switching regulator. High power density is achieved with the MIC2288's internal 34V/1A switch, allowing it to power large loads in a tiny footprint. The MIC2288 implements a constant frequency 1.2MHz PWM current mode control scheme with internal compensation that offers excellent transient response and output regulation performance. The high frequency operation saves board space by allowing small, low-profile external components. The fixed frequency PWM topology also reduces spurious switching noise and ripple to the input power source.The MIC2288 has a junction temperature range of -40°C to +125°C.

The MIC2290 is a 1.2MHz , PWM, boost-switching regulator. The MIC2290 features an internal Schottky diode that reduces circuit board area and total solution cost. High power density is achieved with the MIC2290's internal 34V/0.5A switch, allowing it to power large loads in a tiny footprint. The MIC2290 implements a constant frequency 1.2MHz PWM control scheme. The high frequency operation saves board space by reducing external component sizes. The fixed frequency PWM topology also reduces switching noise and ripple to the input power source. The MIC2290's wide 2.5V to 10V input voltage allows direct operation from 3- to 4-cell NiCad/NiMH/Alkaline batteries, 1- and 2-cell Li-Ion batteries, as well as fixed 3.3V and 5V systems.

The MIC2291 is a 1.2MHz pulse-width modulation (PWM), boost-switching regulator that is optimized for high-current, white LED photo flash applications. With a guaranteed switch current of 1.2A, the MIC2291 easily drives a string of three white LEDs in series at 100mA, ensuring a high level of brightness and eliminating several ballast resistors. The MIC2291 implements a constant frequency, 1.2MHz PWM control scheme. The high frequency PWM operation saves board space by reducing external component sizes. The added benefit of the constant frequency PWM scheme, in contrast to variable frequency topologies, is much lower noise and input ripple injected back to the battery source. To optimize efficiency, the feedback voltage is set to only 95mV. This reduces the power dissipation in the current set resistor, and allows the lowest total output voltage, hence minimal current draw from the battery. The MIC2291 is available with two levels of over-voltage protection, 15V, and 34V. This allows designers to choose the smallest possible external components with the appropriate voltage ratings for their applications. The MIC2291 has a junction temperature range of -40ºC to +125°C.

The MIC2292C and MIC2293C are high frequency, pulse-width modulator (PWM) boost regulators optimized for constant-current, white LED driver applications. Because of their constant PWM switching frequencies of 1.6MHz and 2MHz, respectively, the MIC2292/93C can use the smallest external components, allowing designers to avoid sensitive IF bands in their RF applications. The products feature an internal Schottky diode and two levels of output overvoltage protection allowing a small size and efficient DC/DC solution that requires only four external components. The 2.5V to 10V input voltage range of MIC2292/3C allows direct operation from 1- and 2-cell Li-Ion as well as 3- to 4-cell NiCad/NiMH/Alkaline batteries.

The MIC22950 is a high efficiency 10A integrated switch synchronous buck (step-down) regulator. The MIC22950 switching frequency is programmable from 400kHz to 2MHz, allowing the customer to optimize designing either for efficiency or for the smallest footprint. The MIC22950 achieves over 95% efficiency while still switching at 2MHz over a broad load range. The ultra-high speed control loop keeps the output voltage within regulation, even under extreme transient load swings commonly found in FPGAs and low voltage ASICs. The output voltage can be adjusted down to 0.7V in order to address all low voltage power needs. The MIC22950 features a full range of sequencing and tracking options. The enable and the delay pins, combined with the power good pin, allow multiple outputs to be sequenced in several ways during turn on and turn off. The RC (Ramp Control™) pin allows the device to be connected to any another device in the MIC22x00 family of products, to keep the output voltages within a certain delta V during start up.

The MIC2296 is a 600kHz, PWM DC/DC boost switching regulator. High power density is achieved with the MIC2296's internal 34V / 1.2A switch, allowing it to power large loads in a tiny footprint. The MIC2296 is a version of the MIC2295 1.2MHz, PWM DC/DC boost switching regulator, that offers improved efficiency resulting from 600kHz operation. The MIC2296 implements constant frequency 600kHz PWM current mode control. The MIC2296 offers internal compensation that offers excellent transient response and output regulation performance. The high frequency operation saves board space by allowing small, low-profile external components. The fixed frequency PWM scheme also reduces spurious switching noise and ripple to the input power source. The MIC2296 has an operating junction temperature range of -40°C to +125°C.