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 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.

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
Parameter
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) 28 28
Minimum Output Voltage (V) 0.8 0.8
Maximum Output Voltage (V) 5.5 5.5
PFM, Discontinuous, Hyperlight load, or Skip Mode False False
Typical Tolerance (%) ±1 ±1
Duty Cycle Max (%) 0.82 0.82
Operating Frequency (Hz) 600K 600K
External Clock Sync False False
Power Good Signal True True
Soft Start True True
Internal Compensation True True
Internal Voltage Bias True True
Enable Pin True True
Current Limit / Short Circuit Protection True True
Input UVLO Typ (V) 4.2 4.2
Operating Supply Current (mA) 0.95 0.95
Iq Off (µA) 5 5
Package 10/MSOP 10/MSOP
Documents
MIC2166 - Adaptive On-Time DC-DC ControllerData Sheets11/05/2015724KB
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MIC2166YMME0.0248000.13560010MSOP3x3x1.0mmMatte Tine3
MIC2166YMME-TR0.0248000.20614810MSOP3x3x1.0mmMatte Tine3
MIC2166 - Adaptive On-Time DC-DC Controller MIC2166
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