Micrel MIC2156
The MIC2155 and MIC2156 are a family of two-phase, single-output synchronous buck control ICs featuring small size, high efficiency, and a high level of flexibility. The ICs implement a 500kHz (MIC2155) and 300kHz (MIC2156) voltage mode PWM control, with the outputs switching 180° out of phase. The result of the out-of-phase operation is 1MHz (or 600kHz) input ripple with ripple current cancellation, minimizing the required input filter capacitance.| Part No. | MIC2156 |
|---|---|
| Datasheet | MIC2156 Download |
| Manufacturer |  Micrel |
| Description | PWM Synchronous Buck Controller |
| Buy | Stock & Price |
GENERAL DESCRIPTION
A 1% output voltage tolerance allows the maximum level of system performance. Internal drivers with adaptive gate drive allow the highest efficiency with the minimum external components. Two independent enable pins and a power good output are provided, allowing a high level of control and sequencing capability. The MIC215x family has a junction operating range from -40°C to +125°C. Data sheets and support documentation can be found on Micrel’s web site atFEATURES
● Synchronous buck control ICs with outputs switching 180° out-of-phase● Remote sensing with internal differential amplifier
● 4.5V to 14.5V input voltage range
● Adjustable output voltages down to 0.7V
● 1% output voltage accuracy
● Starts up into a pre-biased output
● 500kHz PWM operation (MIC2155)
● 300kHz PWM operation (MIC2156)
● Adaptive gate drive allows efficiencies over 95%
● Adjustable current limit with no sense resistor
● Senses low-side MOSFET current
● Internal drivers allow 25A per phase
●...
