LM3280 Datasheet (National Semiconductor) - Adjustable Step-Down DC-DC Converter and 3 LDOs

LM3280, Adjustable Step-Down DC-DC Converter and 3 LDOs

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

LM3280 Features

* a separate enable pin for each output. The LM3280 is available in a 16-pin lead free micro SMD package. 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 b