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MIC2111B

5V, 2MHZ High Performnace Driverless PWM Controller

Status: In Production

Features:

  • Single 3.3V or 5V supply
  • Supports load currents up to 40A
  • Programmable valley-current/voltage-mode PWM architecture
  • 3.3V logic PWM output compatible with power-stage modules and DrMOS modules
  • Single tri-state PWM output
  • Programmable switching frequency: 200kHz to 2MHz
  • Differential remote sensing for output voltage and inductor current
  • 0.6V reference voltage with total ±1% accuracy for output
  • Adjustable soft-start/soft-stop and pre-biased safe startup
  • Supports light load and outside audio modes
  • Programmable slope compensation and loop compensation
  • Enable input, power-good (PG) output for sequencing
  • Programmable OCP, output OVP, thermal OTP, and dedicated FAULTb pin for system safe startup/stop
  • Internal thermal shutdown and UVLO
  • -40°C to +125°C junction temperature range
  • Available in 20-pin 3mm x 3mm TQFN package
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

MIC2111B is a programmable-frequency, valley-current/voltage-mode PWM controller that provides the control and protection features necessary for power devices and drivers that use current sensing across the inductor. The MIC2111B can provide single tri-state PWM logic signal to work with either power-stage modules or discrete driver and MOSFETs. The device has precision enable and power-good (PG) functions for sequencing of multiple power supplies. In addition, the solution is compatible with intelligent power stages in a high-current, step-down DC/DC converter.To optimize system size and system efficiency, the MIC2111B frequency can be programmed from 200kHz to 2MHz. The device operates in power-saving mode at light loads by reducing frequency. Optional outside audio range operation is possible when the power-stage is configured in light load mode. The solution uses differential current sensing for better current-limit accuracy and a dedicated differential amplifier for remote output sensing for accurate output voltage control. The MIC2111B has a high-gain transconductance amplifier for loop compensation. External slope compensation can be added through a resistor to avoid sub-harmonic oscillations. Other features include programmable OCP, output OVP, and thermal OTP protections. The MIC2111B offers proprietary bi-directional, single wire fault communication for total system protection.The MIC2111B is available in a 20-pin 3mm x 3mm TQFN package and has a junction temperature range of -40°C to +125°C.

Additional Features
      • Single 3.3V or 5V supply
      • Supports load currents up to 40A
      • Programmable valley-current/voltage-mode PWM architecture
      • 3.3V logic PWM output compatible with power-stage modules and DrMOS modules
      • Single tri-state PWM output
      • Programmable switching frequency: 200kHz to 2MHz
      • Differential remote sensing for output voltage and inductor current
      • 0.6V reference voltage with total ±1% accuracy for output
      • Adjustable soft-start/soft-stop and pre-biased safe startup
      • Supports light load and outside audio modes
      • Programmable slope compensation and loop compensation
      • Enable input, power-good (PG) output for sequencing
      • Programmable OCP, output OVP, thermal OTP, and dedicated FAULTb pin for system safe startup/stop
      • Internal thermal shutdown and UVLO
      • -40°C to +125°C junction temperature range
      • Available in 20-pin 3mm x 3mm TQFN package
Parametrics
Name
Value
Supported Topologies
Buck
Supported Outputs
1
Minimum Input Voltage (V)
3.3
Maximum Input Voltage (V)
5
PFM, Discontinuous, Hyperlight load, or Skip Mode
True
Typical Tolerance (%)
1
Operating Frequency (Hz)
200k - 2M
External Clock Sync
False
Power Good Signal
True
Soft Start
False
Internal Compensation
False
Internal Voltage Bias
False
Enable Pin
False
Current Limit / Short Circuit Protection
False

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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
MIC2111BYMT-T5
0.120800
20
WQFN
3x3x0.6mm
Matte Tin
e3
MIC2111BYMT-TR
0.120800
20
WQFN
3x3x0.6mm
Matte Tin
e3
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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