The MIC2155 and MIC2156 are a family of 2-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. 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.
Additional Features
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
The MIC2155 and MIC2156 are a family of 2-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. 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.
Additional Features
- 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
