Microchip logo
  • All
  • Products
  • Documents
  • Applications Notes
product primary image

MIC2224

2MHz 600mA PWM Buck Converter w/DAC Input and 40mΩ Bypass Switch

Status: In Production

Features:

  • 2.7V to 5.5V input voltage range
  • DAC-adjustable output voltage down to 0.3V
  • 600mA output current in PWM mode
  • Internally protected 40mΩ bypass switch
  • Allows direct connection of battery to load
  • Over 95% efficient
  • Fully integrated MOSFET switches
  • Constant 2MHz PWM operation
  • Internal soft-start
  • 1% line and load regulation
  • <1µA shutdown current
  • Under-voltage lockout
  • Thermal shutdown and current limit protection
  • –40°C to +125°C junction temperature range
View More
Overview
Documents
Development Environment
RoHS Information
Buy Now

Device Overview

Summary

The MIC2224 is a high efficiency 2MHz PWM synchronous buck switching regulator optimized for powering 2.5G and 3G CDMA RF Power Amplifiers. The output voltage of MIC2224 can be dynamically adjusted with an external DAC to maximize PA efficiency versus required output power. When the PA requires the highest power, the DAC can be used to enable a low on-resistance, 40mΩ, bypass switch that powers the PA directly from the battery.

The 2MHz PWM operation of MIC2224 allows the smallest possible components. It also allows the device to easily meet stringent W-CDMA VOUT response specifications. 

The MIC2224 operates from a 2.7V to 5.5V input, making it ideal for single cell Li-Ion applications. The device features built-in power MOSFETs that can supply up to 600mA of output current in PWM mode, or over 1A in bypass mode. The MIC2224 can operate with a maximum duty cycle of 100% for use in low-dropout conditions.

Additional Features
    • 2.7V to 5.5V input voltage range
    • DAC-adjustable output voltage down to 0.3V
    • 600mA output current in PWM mode
    • Internally protected 40mΩ bypass switch
    • Allows direct connection of battery to load
    • Over 95% efficient
    • Fully integrated MOSFET switches
    • Constant 2MHz PWM operation
    • Internal soft-start
    • 1% line and load regulation
    • <1µA shutdown current
    • Under-voltage lockout
    • 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)
0.3
Output Voltage Range Max (V)
5.5
Output Current (mA) max
600
Quiescent Current (mA) typ
0.36
Switching Frequency (kHz)
2000
Synchronous Rectifier
Yes
Operating Temp Range
-40 to 125
Duty Cycle Max (%)
1
SHUTDOWN Current (µA) (Typ)
1

Documents

Jump to:

Development tools data is currently unavailable.

RoHS Information

Part Number
Device Weight (g)
Shipping Weight (Kg)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
MIC2224YML-TR
0.022700
0.643702
10
VDFN
3x3x0.9mm
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.

Buy from the Microchip Store

Grid
View
Table
View
Filter:
Apply
Clear
Only show products with samples
Product
Leads
Package Type
Temp Range
Packing Media
5K Pricing
Buy