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MIC2166

28V Synchronous Buck Controllers Featuring Adaptive ON-Time Control and Hyper Speed Control™

Status: In Production

Features:

  • Hyper Speed Control™ architecture enables
  • High delta V operation (V IN=28V and V OUT=0.8V)
  • Smallest output capacitance
  • Built-in 5V regulator for single-supply operation
  • Any Capacitor™ stable
  • Zero ESR to high ESR
  • Power Good (PGOOD) output
  • Input voltage range: 4.5V to 28V
  • 5µA typical shutdown current
  • 25A output current drive capability
  • Adjustable output from +0.8V to 5.5V with ±1% accuracy
  • 600kHz switching frequency
  • Internal 5ms digital soft-start
  • Thermal shutdown and "hiccup" current limit protection
  • No external current-sense resistor required
  • Safe start-up into pre-biased loads
  • 10-pin MSOP ePad 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 MIC2166 is a synchronous adaptive on-time buck controller targeting high performance, cost sensitive applications such as set-top boxes, gateways, routers, computing peripherals, and telecom/networking equipment.

The MIC2166 operates over a supply range of 4.5V to 28V. It has an internal linear regulator which provides a regulated 5V supply to power the internal control circuitry. MIC2166 operates at a constant 600kHz switching frequency and can be used to drive up to 25A of output current. The output voltage is adjustable from 0.8V to 5.5V.

A unique Hyper Speed Control™ architecture enables ultra-fast transient response while reducing the output capacitance and also makes High VIN/Low VOUT operation possible.

A UVLO feature is provided to ensure proper operation under power-sag conditions to prevent the external power MOSFET from over heating. Also, a soft-start feature is provided to reduce the inrush current. Short current sensing on the bottom MOSFET with hiccup mode operation ensures protection in case of an output short circuit. Further, the MIC2166 includes an EN pin to shut down the converter and a Power-Good (PGOOD) pin to allow simple sequencing.

The MIC2166 is available in a 10 pin MSOP ePad package with a junction operating termperature range from -40°C to +125°C.

Additional Features
    • Hyper Speed Control™ architecture enables
      • High delta V operation (V IN=28V and V OUT=0.8V)
      • Smallest output capacitance
    • Built-in 5V regulator for single-supply operation
    • Any Capacitor™ stable
      • Zero ESR to high ESR
    • Power Good (PGOOD) output
    • Input voltage range: 4.5V to 28V
    • 5µA typical shutdown current
    • 25A output current drive capability
    • Adjustable output from +0.8V to 5.5V with ±1% accuracy
    • 600kHz switching frequency
    • Internal 5ms digital soft-start
    • Thermal shutdown and "hiccup" current limit protection
    • No external current-sense resistor required
    • Safe start-up into pre-biased loads
    • 10-pin MSOP ePad package
    • -40°C to +125°C junction temperature range
Parametrics
Name
Value
Supported Topologies
Sync. Buck
Supported Outputs
1
Minimum Input Voltage (V)
4.5
Maximum Input Voltage (V)
28
Minimum Output Voltage (V)
0.8
Maximum Output Voltage (V)
5.5
PFM, Discontinuous, Hyperlight load, or Skip Mode
False
Typical Tolerance (%)
±1
Duty Cycle Max (%)
0.82
Operating Frequency (Hz)
600K
External Clock Sync
False
Power Good Signal
True
Soft Start
True
Internal Compensation
True
Internal Voltage Bias
True
Enable Pin
True
Current Limit / Short Circuit Protection
True
Input UVLO Typ (V)
4.2
Operating Supply Current (mA)
0.95
Iq Off (µA)
5
Package
10/MSOP

Documents

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Development Environment

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Software Libraries
Analog Simulation - MIC2166

The Micrel MIC2166 is a synchronous adaptive on-time buck controller targeting high performance, cost sensitive applications such as set-top boxes, gateways, routers, computing peripherals, and...

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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
MIC2166YMME
0.024800
0.135600
10
MSOP
3x3x1.0mm
Matte Tin
e3
MIC2166YMME-TR
0.024800
0.206148
10
MSOP
3x3x1.0mm
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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