1 Features

• VIN range:

– Legacy chip: 2.2 V to 16 V

– New chip: 2.5 V to 16V

• VOUT range:

– Legacy chip: 1.23 V to 15.0 V

– New chip: 1.2 V to 15.0 V

• VOUT(typ) accuracy:

– Legacy chip: ±1

– New chip: ±0.5

• Output accuracy over load and temperature:

– Legacy chip: ±3.5

– New chip: ±1

• Output current: Up to 50 mA

• Quiescent current, low IQ (new chip):

– 55 μA at ILOAD = 0 mA

– 350 μA at ILOAD = 50 mA

• Shutdown current over temperature:

– Legacy chip: < 1 μA

– New chip: ≤ 0.8 μA

• Output current limiting and thermal protection

• Stable with 2.2-μF ceramic capacitors (new chip)

• High PSRR (new chip):

– 70 dB at 1 kHz, 42 dB at 1 MHz

• Operating junction temperature: –40°C to +125°C

• Package: 5-pin SOT-23 (DBV)

2 Applications

• Residential breakers

• Solid state drives (SSD)

• Electricity meters

• Appliances

• Building automation

3 Description

The LP2980-ADJ is an adjustable-output, wide-input,

low-dropout voltage regulator supporting an input

voltage range up to 16 V and up to 50 mA of load

current. The LP2980-ADJ supports an output range

of 1.2 V to 15.0 V (new chip) and 1.23 V to 15.0 V

(legacy chip).

Additionally, the LP2980-ADJ (new chip) has a 1

output accuracy across load and temperature that

can meet the needs of low-voltage microcontrollers

(MCUs) and processors.

In the new chip, wide bandwidth PSRR performance

of greater than 70 dB at 1 kHz and 45 dB at

1 MHz helps attenuate the switching frequency of

an upstream DC/DC converter and minimize post

regulator filtering.

The internal soft-start time and current-limit protection

reduce inrush current during start up, thus minimizing

input capacitance. Standard protection features, such

as overcurrent and overtemperature protection, are

included.

The LP2980-ADJ is available in a 5-pin, 2.9-mm ×

1.6-mm SOT-23 (DBV) package.