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a
ADP3301
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
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GENERAL DESCRIPTION
The ADP3301 is a member of the ADP330x family of precision
low dropout anyCAP™* voltage regulators. The ADP3301
stands out from the conventional LDOs with a novel architec-
ture, an enhanced process and a new package. Its patented
design includes a noninverting wideband driver and a stage that
permits the use of an internal “pole splitting” capacitor to
stabilize the feedback loop with a single output capacitor as
small as 0.47 µF. This device is stable with any type of capacitor
regardless of its ESR (Equivalent Serial Resistance) value,
including ceramic types (MLCC) for space restricted applica-
tions. The ADP3301 achieves exceptional accuracy of ±0.8% at
room temperature and ±1.4% overall accuracy over tempera-
ture, line and load regulations. The dropout voltage of the
ADP3301 is only 100 mV (typical) at 100 mA.
In addition to the new architecture and process, ADI’s new
proprietary thermally enhanced package (Thermal Coastline)
can handle 1 W of power dissipation without external heat sink
or large copper surface on the PC board. This keeps PC board
real estate to a minimum and makes the ADP3301 very
attractive for use in portable equipment.
High Accuracy anyCAP™*
100 mA Low Dropout Linear Regulator
FEATURES
High Accuracy (Over Line and Load Regulations
at +258C): 60.8%
Ultralow Dropout Voltage: 100 mV Typical @ 100 mA
Requires Only C
O
= 0.47 mF for Stability
anyCAP™* = Stable with All Types of Capacitors
Current and Thermal Limiting
Low Noise
Dropout Detector
Low Shutdown Current: 1 mA
Several Fixed Voltage Options
3.0 V to 12 V Supply Range
–208C to +858C Ambient Temperature Range
Thermally Enhanced SO-8 Package
Excellent Line and Load Regulations
APPLICATIONS
Cellular Telephones
Notebook, Palmtop Computers
Battery Powered Systems
Portable Instruments
Post Regulator for Switching Supplies
Bar Code Scanners
The ADP3301 operates with a wide input voltage range from
3 V to 12 V and delivers a load current in excess of 100 mA. It
features an error flag that signals when the device is about to
lose regulation or when the short circuit or thermal overload
protection is activated. Other features include shutdown and
optional noise reduction capabilities. The ADP330x anyCAP™*
LDO family offers a wide range of output voltages and output
current levels from 50 mA to mA:
ADP3300 (50 mA, SOT-23)
ADP3301-5.0
5
4
6
3
NR
OUT
IN
1
2
7
8
ERR
R1
330kΩ
E
OUT
C2
0.47µF
V
OUT
= +5V
ON
OFF
GND
C1
0.47µF
V
IN
Figure 1. Typical Application Circuit
FUNCTIONAL BLOCK DIAGRAM
Q2
THERMAL
PROTECTION
Gm
Q1
CC
BANDGAP
REF
DRIVER
R1
R2
ADP3301
OUT
IN
ERR
SD
GND
*anyCAP is a trademark of Analog Devices Inc.
© Analog Devices, Inc., 1997–2014
