The MIC2253 is a high power density, 1 MHz PWM DC/DC boost regulator. A 12-pin 3mm x 3mm DFN package with a 3.5-A minimum switching current limit combined with a 1 MHz switching frequency allows the MIC2253 to use a smaller inductor and deliver high power in a tiny solution size.
Typical Application Circuit
The 2.5V to 10V input voltage range of the MIC2253 allows direct operation from 1 and 2 battery Li-ion as well as 3-4 battery NiCad, NIMH, alkaline or lithium batteries. Maximum battery life with low 0.1μa shutdown current guaranteed. To prevent high inrush current, the MIC2253 has a minimum soft start period of 1ms by default and can be extended with an external capacitor.
Functional Block Diagram
Feratures
● 3.5A Minimum Switch Current
● 1.245V ±3% Feedback Voltage
● 2.5V to 10V Input Voltage
● Output Overvoltage Protection (OVP)
● Externally Programmable Soft-Start
● Output Voltage Up to 30V
● Fixed 1 MHz Operation
● < 1% Line Regulation
● 0.1 µA Shutdown Current
● Overtemperature Protection
● Undervoltage Lockout (UVLO)
● 12-Pin 3 mm x 3 mm Leadless DFN Package
● - 40°C to +125°C Junction Temperature Range
Applications
● Mobile Handsets
● Portable Media/MP3 Players
● Portable Navigation Devices (GPS)
● WiFi/WiMax/WiBro Modules
● Digital Cameras
● Wireless LAN Cards
● USB-Powered Devices
● Portable Applications
Package Type
