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MIC261201

28V/12A DC-DC Buck Regulator w/Hyper Speed Control™

Status: In Production

Features:

  • Hyper Speed Control™ architecture enables
  • High delta V operation (VIN = 28V and VOUT = 0.8V)
  • Small output capacitance
  • 4.5V to 28V voltage input
  • 12A output current capability, up to 95% efficiency
  • Adjustable output from 0.8V to 5.5V
  • ±1% feedback accuracy
  • Any Capacitor® stable - zero-to-high ESR
  • 600kHz switching frequency
  • No external compensation
  • Power Good (PG) output
  • Foldback current-limit and "hiccup" mode short-circuit protection
  • Supports safe startup into a pre-biased load
  • -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 MIC261201 is a constant-frequency, synchronous buck regulator featuring a unique adaptive on-time control architecture. The MIC261201 operates over an input supply range of 4.5V to 28V and provides a regulated output of up to 12A of output current. The output voltage is adjustable down to 0.8V with a guaranteed accuracy of ±1%, and the device operates at a switching frequency of 600kHz. Hyper Speed Control™ architecture allows for ultra-fast transient response while reducing the output capacitance and also makes (High VIN)/(Low VOUT) operation possible. This adaptive tON ripple control architecture combines the advantages of fixed-frequency operation and fast transient response in a single device. The MIC261201 offers a full suite of protection features to ensure protection of the IC during fault conditions. These include undervoltage lockout to ensure proper operation under power-sag conditions, internal soft-start to reduce inrush current, foldback current limit, hiccup mode short-circuit protection and thermal shutdown. An open-drain Power Good (PG) pin is provided.

Additional Features
    • Hyper Speed Control™ architecture enables
      • High delta V operation (VIN = 28V and VOUT = 0.8V)
      • Small output capacitance
    • 4.5V to 28V voltage input
    • 12A output current capability, up to 95% efficiency
    • Adjustable output from 0.8V to 5.5V
    • ±1% feedback accuracy
    • Any Capacitor® stable - zero-to-high ESR
    • 600kHz switching frequency
    • No external compensation
    • Power Good (PG) output
    • Foldback current-limit and "hiccup" mode short-circuit protection
    • Supports safe startup into a pre-biased load
    • -40°C to +125°C junction temperature range

     

Parametrics
Name
Value
Regulator Type
Step Down (Buck)
# of Outputs
1
Input Voltage Range Min (V)
4.5
Input Voltage Range Max (V)
28
Output Voltage Range Min (V)
0.8
Output Voltage Range Max (V)
5.5
Output Current (mA) max
12000
Quiescent Current (mA) typ
0.45
Switching Frequency (kHz)
600
Synchronous Rectifier
Yes
Operating Temp Range
-40 to 125
Vfb (V)
0.8
Duty Cycle Max (%)
0.82
SHUTDOWN Current (µA) (Typ)
5

Documents

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Development Environment

  • Software Libraries
Software Libraries
Analog Simulation - MIC261201

The Micrel MIC261201 is a constant-frequency, synchronous buck regulator featuring a unique adaptive on-time control architecture. The MIC261201 operates over an input supply range of 4.5V to 28V and...

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (Kg)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
MIC261201YJL-TR
0.081600
0.227180
28
VQFN
5x6x0.9mm
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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