LM3280 Overview
The LM3280 is a multi-functional Power Management Unit, optimized for low-power handheld applications such as Cellular Phones. The LM3280 incorporates three low-dropout LDO voltage regulators and one step down PWM DC-DC converter with an internal Bypass FET. The step down converter's output voltage can be set using an analog input (VCON) for optimizing efficiency of the RF PA at various power levels.
LM3280 Key Features
- 2MHz (typ.) PWM Switching Frequency
- Operates from a single Li-Ion cell (2.7V to 5.5V)
- Adjustable Output Voltage (0.8V to 3.6V) DC-DC
- High-efficiency synchronous buck converter
- 300mA Maximum load capability (PWM mode)
- 500mA Maximum load capability (Bypass mode)
- PWM, Forced and Automatic Bypass Mode
- 3 Low-dropout and fast transient response LDOs
- 16-pin micro SMD Package
- Current Overload Protection
