High Accuracy, Ultralow IQ, 1.5 A,
anyCAP® Low Dropout Regulator
ADP3339
FUNCTIONAL BLOCK DIAGRAM
FEATURES
High accuracy over line and load: 0.9ꢀ @ 25°C,
Q1
OUT
IN
1.5ꢀ over temperature
ADP3339
R1
R2
THERMAL
PROTECTION
Ultralow dropout voltage: 230 mV (typ) @ 1.5 A
Requires only CO = 1.0 µF for stability
anyCAP = stable with any type of capacitor (including MLCC)
Current and thermal limiting
CC
g
DRIVER
m
Low noise
2.8 V to 6 V supply range
BANDGAP
REF
–40°C to +85°C ambient temperature range
SOT-223 package
GND
Figure 1.
APPLICATIONS
Notebook, palmtop computers
SCSI terminators
Battery-powered systems
PCMCIA regulators
ADP3339
V
IN
V
OUT
OUT
IN
1µF
1µF
GND
Bar code scanners
Figure 2. Typical Application Circuit
Camcorders, cameras
GENERAL DESCRIPTION
The ADP3339 is a member of the ADP33xx family of precision,
low dropout, anyCAP voltage regulators. The ADP3339 operates
with an input voltage range of 2.8 V to 6 V and delivers a load
current up to 1.5 A. The ADP3339 stands out from the
conventional LDOs with a novel architecture and an enhanced
process that enables it to offer performance advantages and
higher output current than its competition. Its patented design
requires only a 1.0 µF output capacitor for stability. This device
is insensitive to output capacitor equivalent series resistance
(ESR), and is stable with any good quality capacitor, including
ceramic (MLCC) types for space-restricted applications. The
ADP3339 achieves exceptional accuracy of 0.9% at room
temperature and 1.5% over temperature, line, and load
variations. The dropout voltage of the ADP3339 is only 230 mV
(typical) at 1.5 A. The device also includes a safety current limit
and thermal overload protection. The ADP3339 has ultralow
quiescent current: 130 µA (typical) in light load situations.
Rev. A
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