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MIC2184

14V, Non-Synchronous Buck Controller with External Frequency Sync

Status: In Production

Features:

  • Input voltage range: 2.9V to 14V
  • >90% efficiency
  • Oscillator frequency of 400kHz
  • Frequency divide-by-two pin
  • Frequency sync to 600kHz
  • FreqOut oscillator output allows simple charge pump implementation in low voltage systems
  • 1.245V reference output
  • Front edge blanking
  • 5ω output driver
  • Soft start
  • PWM current mode control
  • 1µA shutdown current
  • Cycle-by-cycle current limiting
  • Frequency foldback short circuit protection
  • Adjustable under-voltage lockout
  • 16-pin narrow-body SOIC and QSOP package options.
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

MIC2184 is a high efficiency PWM buck control IC. With its wide input voltage range of 2.9V to 14V, the MIC2184 can be used to efficiently step voltages down in 1- or 2-cell Li-Ion battery powered applications, as well as in fixed 3.3V, 5V, or 12V systems.

Efficiencies over 90% are achievable over a wide range of load conditions with the MIC2184's PWM control scheme. The operating frequency can be divided by two by raising the FREQ/2 pin to VDD. This allows the user to optimize efficiency versus board space. It also allows the MIC2184 to be externally synchronized to frequencies below its nominal 400KHz.

The MIC2184 features an oscillator output, FreqOut, which can be used to implement a simple charge pump in low voltage applications. The output of the charge pump can be fed into the gate drive power circuitry via the VINP pin, allowing enhanced gate drive, hence higher efficiencies, despite low input voltages.

MIC2184 features a 1µA shutdown mode, and a programmable undervoltage lockout, making it well suited for portable applications.

The MIC2184 is available in a 16-pin SOP (small outline package) and QSOP package options with a junction temperture range range from -40°C to +125°C.

Additional Features
    • Input voltage range: 2.9V to 14V
    • >90% efficiency
    • Oscillator frequency of 400kHz
    • Frequency divide-by-two pin
    • Frequency sync to 600kHz
    • FreqOut oscillator output allows simple charge pump implementation in low voltage systems
    • 1.245V reference output
    • Front edge blanking
    • 5ω output driver
    • Soft start
    • PWM current mode control
    • 1µA shutdown current
    • Cycle-by-cycle current limiting
    • Frequency foldback short circuit protection
    • Adjustable under-voltage lockout
    • 16-pin narrow-body SOIC and QSOP package options.
Parametrics
Name
Value
Supported Topologies
Async. Buck
Supported Outputs
1
Minimum Input Voltage (V)
2.9
Maximum Input Voltage (V)
14
Minimum Output Voltage (V)
1.3
Maximum Output Voltage (V)
12
Typical Tolerance (%)
±1
Duty Cycle Max (%)
1
Operating Frequency (Hz)
200K / 400K
External Clock Sync
True
Soft Start
True
Internal Voltage Bias
True
Enable Pin
True
Current Limit / Short Circuit Protection
True
Operating Supply Current (mA)
1.7
Iq Off (µA)
0.5
Package
16/SOP, 16/QSOP

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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
MIC2184YQS
0.083600
0.160000
16
QSOP
3.90mm(.150in)
Matte Tin
e3
MIC2184YQS-TR
0.083600
0.320000
16
QSOP
3.90mm(.150in)
Matte Tin
e3
MIC2184YM
0.157400
0.300000
16
SOIC
.150in
Matte Tin
e3
MIC2184YM-TR
0.157400
0.307692
16
SOIC
.150in
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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