ADP3309ART-2.7-REEL7

GENERAL 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 type of capacitor regardless of its ESR (equivalent series resistance) 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.
The ADP3309 operates with a wide input voltage range from 2.8 V to 12 V and delivers a load current in excess of 100 mA. The ADP3309 anyCAP LDO offers a wide range of output voltages. For a 50 mA version, refer to the ADP3308 data sheet.

FEATURES

±1.2% Accuracy Over Line and Load Regulations @ 25°C
Ultralow Dropout Voltage: 120 mV Typical @ 100 mA
Requires Only CO = 0.47 μF for Stability
anyCAP = 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 SOT-23-5 Package
Excellent Line and Load Regulations

APPLICATIONS
Cellular Telephones
Notebook, Palmtop Computers
Battery-Powered Systems
PCMCIA Regulator
Bar Code Scanners
Camcorders, Cameras