LM3280TL/NOPB Description
The LM3280TL/NOPB is a multi-functional Power Management Unit, optimized for low-power handheld applications such as Cellular Phones. The LM3280TL/NOPB 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 the efficiency of the RF PA at various power levels. The LDO operates a nominal output voltage of 2.85V and a maximum load current capability of 20mA for a reference voltage required by linear RF power amplifiers. The LM3280TL/NOPB additionally features a separate enable pin for each output. The LM3280TL/NOPB is available in a 16-pin lead-free DSBGA package.
LM3280TL/NOPB Features
2MHz (Typ.) PWM Switching Frequency
Operates from a Single Li-lon 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 DSBGA Package
Current Overload Protection
Thermal Overload Protection
LM3280TL/NOPB Applications
Cellular Phones
Hand-Held Radios
Battery-Powered RF Devices
Automotive
Body electronics & lighting
Communications equipment
Wireless infrastructure
Personal electronics
Connected peripherals & printers
