MIC2267 _ BDTIC 中国领先电子元器件代理商

MIC2267

The MIC2267 is a USB Power Maximizer which transfers the maximum power from the limited USB current source by shaping the input current limit profile. It incorporates a high efficiency, integrated synchronous step down regulator. Internal 150mΩ switches and adjustable operating frequency allows the MIC2267 to achieve greater than 90% efficiency across a broad load range. It replaces the USB current limit switch, 5V buck regulator and minimizes capacitance for many USB applications. The adjustable frequency control can be utilized to move harmonics away from sensitive frequency bands.

The MIC2267 allows the input current limit profile to be shaped for various applications. With a current mode control with external compensation, the MIC2267 transient response can be optimized over load and output capacitance making it highly flexible for many applications

Additional features include 1µA shutdown current, output current limit and thermal shutdown protection. The MIC2267 is available in a 12-pin 3mm x 3mm MLF^® with a junction operating range from -40°C to +125°C.

产品特性

Input voltage range: 3.0V to 5.5V
Output voltage adjustable down to 1.0V
Up to 96% efficiency at 500mA output
Efficiency <90% across a broad load range
Fast transient response
Adjustable frequency from 400kHz to 1.5MHz
Adjustable input current limiting 100mA to over 1A
100% maximum duty cycle
Fully integrated MOSFET switches
Micropower shutdown
Thermal shutdown and output current limitÂ protection
12-pin 3mm x 3mm MLF®
Junction temperature range: -40°C to +125°C

技术参数

aspxParamName aspxParamValue	aspxParamValue
Regulator Type Step Down (Buck)	Step Down (Buck)
# of Outputs 1	1
Input Voltage Range Min (V) 3	3
Input Voltage Range Max (V) 5.5	5.5
Output Voltage Range Min (V) 1	1
Output Voltage Range Max (V) 5.5	5.5
Output Current (A) max 2	2
Quiescent Current (mA) typ 1	1
Synchronous Rectifier Yes	Yes
Operating Temp Range -40 to 125	-40 to 125
Vfb (V) 1	1
Duty Cycle Max (%) 1	1
SHUTDOWN Current (µA) (Typ) 1	1