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MIC2124

Synchronous Buck Controller w/Adaptive On-Time Control

Status: In Production

Features:

  • +3V to +18V input voltage
  • 25A output current capability
  • Any Capacitor™ stable
  • Zero ESR to high ESR
  • Output down to 0.8V with ±1% FB accuracy
  • Up to 94% efficiency
  • 300kHz switching frequency
  • All N-Channel MOSFET design
  • Shutdown feature with EN/COMP
  • No current-sense resistor needed
  • Internal 4ms digital soft-start
  • Thermal shutdown
  • Pre-bias output safe
  • Cycle-by-Cycle foldback current-limit protection
  • 10-pin MSOP package
  • -40°C to +125°C junction temperature range
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

The MIC2124 is a member of the Hyper Speed Control™ family of DC-DC controllers. It uses an adaptive on-time current mode control scheme and operates at a constant frequency.

The MIC2124 operates over a supply range of +3V to +18V, and is independent of the IC supply voltage VIN. It operates at a fixed 300kHz switching frequency and can be used to provide up to 25A of output current. The output voltage is adjustable down to +0.8V.

The MIC2124 includes an EN/COMP pin that can be pulled low to shut down the converter. The MIC2124 optimizes performance and ensures stability with external compensation.

The UVLO is provided to ensure proper operation under power-sag conditions and to make sure that the external power MOSFET has enough voltage to work with. An internal digital soft-start ensures reduced inrush current. Cycle-by-cycle current limiting ensures FET protection.

The MIC2124 is available in a 10-pin MSOP package with a junction temperature operating range from -40°C to +125°C.

Additional Features
    • +3V to +18V input voltage
    • 25A output current capability
    • Any Capacitor™ stable
      • Zero ESR to high ESR
    • Output down to 0.8V with ±1% FB accuracy
    • Up to 94% efficiency
    • 300kHz switching frequency
    • All N-Channel MOSFET design
    • Shutdown feature with EN/COMP
    • No current-sense resistor needed
    • Internal 4ms digital soft-start
    • Thermal shutdown
    • Pre-bias output safe
    • Cycle-by-Cycle foldback current-limit protection
    • 10-pin MSOP package
    • -40°C to +125°C junction temperature range
Parametrics
Name
Value
Supported Topologies
Sync. Buck
Supported Outputs
1
Minimum Input Voltage (V)
3
Maximum Input Voltage (V)
18
Minimum Output Voltage (V)
0.8
Typical Tolerance (%)
±1
Duty Cycle Max (%)
0.91
Operating Frequency (Hz)
300K
Soft Start
True
Internal Voltage Bias
True
Enable Pin
True
Current Limit / Short Circuit Protection
True
Input UVLO Typ (V)
2.7
Operating Supply Current (mA)
1.4
Iq Off (µA)
1
Package
10/MSOP

Documents

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Software Library

Development Environment

  • Software Libraries
Software Libraries
Analog Simulation - MIC2124

The Micrel MIC2124 is a member of the Hyper Speed Control™ family of DC-DC controllers. It uses an adaptive on-time current mode control scheme and operates at a constant frequency. The...

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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
MIC2124YMM
0.024500
0.135600
10
MSOP
3x3x1.0mm
NiPdAu
e4
MIC2124YMM-TR
0.024500
0.431180
10
MSOP
3x3x1.0mm
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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