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MIC2285A

8MHz 600mA Synchronous Buck Regulator w/LowQ® Mode

Status: In Production

Features:

  • Light load LowQ® LDO mode
  • 8MHz PWM mode
  • Adjustable output voltage option down to 1V
  • Ultra-fast transient response
  • Requires only a 0.47µH inductor
  • Enables sub 0.55mm profile solution
  • Fully integrated MOSFET switches
  • Micropower shutdown
  • Thermal shutdown and current limit protection
  • -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 MIC2285A is a high efficiency 8MHz PWM synchronous buck (step-down) regulator that features a LowQ® LDO standby mode that draws only 18µA of quiescent current. The MIC2285A allows an ultra-low noise, small size, and high efficiency solution for portable power applications.

In PWM mode, the MIC2285A operates with a constant frequency 8MHz PWM control. Under light load conditions, such as in system sleep or standby modes, the PWM switching operation can be disabled to reduce switching losses. In this light load LowQ® mode, the LDO maintains the output voltage and draws only 18µA of quiescent current. The LDO mode of operation saves battery life while not introducing spurious noise and high ripple as experienced with pulse skipping or bursting mode regulators.

The MIC2285A operates from 2.7V to 5.5V input and features internal power MOSFETs that can supply up to 600mA output current in PWM mode. It can operate with a maximum duty cycle of 100% for use in low-dropout conditions.

Additional Features
    • Light load LowQ® LDO mode
    • 8MHz PWM mode
    • Adjustable output voltage option down to 1V
    • Ultra-fast transient response
    • Requires only a 0.47µH inductor
    • Enables sub 0.55mm profile solution
    • Fully integrated MOSFET switches
    • Micropower shutdown
    • Thermal shutdown and current limit protection
    • -40°C to +125°C junction temperature range
Parametrics
Name
Value
Regulator Type
Step Down (Buck)
# of Outputs
1
Input Voltage Range Min (V)
2.7
Input Voltage Range Max (V)
5.5
Output Voltage Range Min (V)
1
Output Voltage Range Max (V)
5.5
Output Current (mA) max
600
Quiescent Current (mA) typ
0.79
Switching Frequency (kHz)
8000
Synchronous Rectifier
Yes
Operating Temp Range
-40 to 125
Vfb (V)
1
Duty Cycle Max (%)
100
SHUTDOWN Current (µA) (Typ)
0.01

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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
MIC2285AYMT-TR
0.006200
0.073000
10
UDFN
2x2x0.6mm
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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