ADP3309ART-2.5-RL  Description

The ADP3309 is a member of the ADP330x family of precision low dropout anyCAP voltage regulators. It is pin-for-pin and functionally compatible with National’s LP2981, but offers performance advantages. The ADP3309 stands out from conventional LDOs with a novel architecture and an enhanced

process. Its patented design requires only a 0.47 μF output capacitor for stability. This device is stable with any capacitor regardless of its equivalent series resistance (ESR) value, including ceramic types for space-restricted applications.

The ADP3309 achieves ±1.2% accuracy at room temperature and ±2.2% overall accuracy over temperature, line, and load regulations. The dropout voltage of the ADP3309 is only 120 mV (typical) at 100 mA. This device also includes a current limit and a shutdown feature. In shutdown mode, the ground

current is reduced to ~1 μA. 

ADP3309ART-2.5-RL  Features

±1.2% accuracy over the line and load regulations @ 25°C

Ultralow dropout voltage: 120 mV typical @ 100 mA

Requires only COUT = 0.47 μF for stability

any cap LDOs are stable with all types of capacitors

(including MLCC)

Current and thermal limiting

Low noise

Low shutdown current: 1 μA

2.8 V to 12 V supply range

?20°C to +85°C ambient temperature range

Several fixed voltage options

Ultrasmall 5-lead SOT-23 package

Excellent line and load regulations

ADP3309ART-2.5-RL  Applications

Cellular telephones

Notebook, palmtop computers

Battery-powered systems

PCMCIA regulator

Bar code scanners

Camcorders, cameras