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.

产品特性
  • 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
技术参数
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
文档资料
MIC2155/6 - Two-Phase, Single-Output, PWM Synchronous Buck Control ICData Sheets11/05/2015616KB
订购型号
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
MIC2155YML-TR32VQFN-40C to +125CT/R**********
器件无铅环保信息
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MIC2155YML-TR0.0641000.21400032VQFN5x5x0.9mmNiPdAue4
MIC2155/6 - Two-Phase, Single-Output, PWM Synchronous Buck Control IC MIC2155