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MIC2155

14.5V, Dual Output Synchronous Buck Controller IC, 500 KHZ

Status: In Production

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
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

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

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (grams)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
MIC2155YML-TR
0.064100
0.214000
32
VQFN
5x5x0.9mm
NiPdAu
e4
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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