MIC2155 _ BDTIC a Leading Distributor in China

MIC2155

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.

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

Parameter

Parameter Name Value	Value
Supported Topologies Sync. Buck	Sync. Buck
Supported Outputs 1	1
Minimum Input Voltage (V) 4.5	4.5
Maximum Input Voltage (V) 14.5	14.5
Minimum Output Voltage (V) 0.7	0.7
Maximum Output Voltage (V) 3.6	3.6
Typical Tolerance (%) ±1	±1
Duty Cycle Max (%) 0.8	0.8
Operating Frequency (Hz) 500K	500K
External Clock Sync True	True
Power Good Signal True	True
Soft Start True	True
Internal Voltage Bias True	True
Enable Pin True	True
Current Limit / Short Circuit Protection True	True
Operating Supply Current (mA) 6	6
Iq Off (µA) 210	210
Package 32/5x5 MLF	32/5x5 MLF