ADP3331 High Accuracy, Ultra-Low Quiescent Current LDO; SOT-23

The ADP3331 is a member of the ADP330x family of precision low dropout anyCAP™ voltage regulators. The ADP3331 operates with an input voltage range of 2.9 V to 12 V and delivers a load current up to 200 mA. The ADP3331 stands out from the conventional LDO's with a novel architecture and an enhanced process which enables it to offer performance advantages and higher output current than its compeititon. Its patented design requires only a 0.47 µF output capacitor for stability. This device is insensitive to capacitor Equivalent Series Resistance (ESR), and is stable with any good quality capacitor, including ceramic (MLCC) types for space restricted applications. The ADP3331 achieves exceptional accuracy of ± 0.7% at room temperature and ± 1.4% overall accuracy over temperature, line and load variations. The dropout voltage of the ADP3331 is only 140 mV (typical) at 200 mA. This device also includes a safety current limit, thermal overload protection and a shutdown feature. In shutdown mode, the ground current is reduced to less than 2 µA. The ADP3331 has ultralow quiescent current 34 µA (typical) in light load situations. The SOT-23-6 package has been thermally enhanced using Analog Device's proprietary Chip-on-Lead™ feature to maximize power dissipation.

Features and Benefits

High Accuracy over Line and Load: ±0.7% @ 25°C, 1.4% over Temperature

Ultralow Dropout Voltage: 140 mV (Typ) @
200 mA

Can Be Used as a High Current (>1 A) LDO Controller

Requires Only CO = 0.47 µF for Stability

anyCAP = Stable with Any Type of Capacitor (Including MLCC)

Current and Thermal Limiting

Low Noise

Low Shutdown Current: 10 nA Typical

2.6 V to 12 V Supply Range

1.5 V to 11.75 V Output Range

–40°C to +85°C Ambient Temperature
Range

Ultrasmall Thermally Enhanced
Chip-on-Lead™ SOT-23-6
Lead Package

Power Management

Linear Regulators

Design Tools

ADI Linear Regulator Design Tool and Parametric Search .

Data Sheets

Document	note
ADP3331: Adjustable Output Ultralow IQ, 200 mA, SOT-23, anyCAP® Low Dropout Regulator Data Sheet (Rev. B)	PDF 350 kB

Application Notes

Document	note
AN-1072: How to Successfully Apply Low Dropout Regulators	PDF 105 kB
AN-262: Low-Noise Low Drop-Out Regulator for Portable Equipment	PDF 341 kB