GENERAL DESCRIPTION
The PT6221 is a constant frequency,
6-pin SOT23 current mode step-up converter intended for small, low power
applications. The PT6221 switches at
1MHz and allows the use of tiny, low cost
capacitors and inductors 2mm or less in height. Internal soft-start results in small inrush current and extends battery life.
The PT6221 features automatic shifting
to pulse frequency modulation mode at
light loads. The PT6221 includes
under-voltage lockout, current limiting,
and thermal overload protection to prevent damage in the event of an output overload. The PT6221 is available in a
small 6-pin SOT-23 package.
FEATURES
● Integrated 80mΩ Power MOSFET
● 2V to 24V Input Voltage
● 1MHz Fixed Switching Frequency
● Internal 4A Switch Current Limit
● Adjustable Output Voltage
● Internal Compensation
● Up to 28V Output Voltage
●Automatic Pulse Frequency Modulation
● Mode at Light Loads
● up to 97% Efficiency
● Available in a 6-Pin SOT23-6 Package
APPLICATIONS
●Battery-Powered Equipment
●Set-Top Boxes
●White LED Driver
●DSL and Cable Modems and Routers
●Networking cards powered from PCI or PCI express slots
