a
High Accuracy anyCAP™*
300 mA Low Dropout Linear Regulator
ADP3306
FUNCTIONAL BLOCK DIAGRAM
IN
THERMAL
PROTECTION
Q2
SD
BANDGAP
REF
GND
DRIVER
Q1
FEATURES
High Accuracy Over Line and Load Regulations
at 25 C: 1%
Ultralow Dropout Voltage: 300 mV Typical @ 300 mA
Requires Only C
O
= 1 F for Stability
anyCAP™ = Stable with All Types of Capacitors
(Including MLCC)
Current and Thermal Limiting
Low Noise
Dropout Detector
Low Shutdown Current: 1 A
Several Fixed Voltage Options
3.2 V to 12 V Supply Range
–20 C to +85 C Ambient Temperature Range
Thermally Enhanced SO-8 and TSSOP-14 Packages
Excellent Line and Load Regulations
APPLICATIONS
Cellular Telephones
Notebook, Palmtop Computers
Battery Powered Systems
Portable Instruments
Post Regulator for Switching Supplies
Bar Code Scanners
GENERAL DESCRIPTION
ADP3306
OUT
CC
R1
ERR
Gm
R2
The ADP3306 is a member of the ADP330x family of precision
low dropout anyCAP™ voltage regulators. The ADP3306
stands out from the conventional LDOs with a novel architec-
ture, an enhanced process and a new package. Its patented
design requires only a 0.1
µF
output capacitor for stability.
This device is stable with any capacitor, regardless of its ESR
(Equivalent Series Resistance) value, including ceramic types
(MLCC) for space restricted applications. The ADP3306
achieves exceptional accuracy of
±1.0%
at room temperature and
±1.5%
overall accuracy over temperature, line and load regula-
tions. The dropout voltage of the ADP3306 is only 300 mV
(typical) at 300 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 ADP3306 very attrac-
tive for use in portable equipment.
Y
R
A L
IN A
IM IC
L N
E H
R C TA
P E
T DA
V
IN
7
8
NR
3
1
2
ADP3306-5.0
OUT
V
OUT
= +5V
R
1
330k
E
OUT
C2
1 F
IN
C1
0.47 F
ERR
6
4
5
ON
OFF
GND
SD
Figure 1. Typical Application Circuit
The ADP3306 operates with a wide input voltage range from
3.2 V to 12 V and delivers a load current in excess of 300 mA. It
features an error flag that signals when the device is about to lose
regulation or when the short circuit or thermal overload protec-
tion is activated. Other features include shutdown and optional
noise reduction capabilities. The ADP330x anyCAP™ LDO fam-
ily offers a wide range of output voltages and output current
levels from 50 mA to 300 mA:
ADP3300 (50 mA, SOT-23)
ADP3307 (100 mA, SOT-23)
ADP3301 (100 mA)
ADP3302 (100 mA, Dual Output)
ADP3304 (100 mA, Dual Output with Separate Grounds)
ADP3303 (200 mA)
*anyCAP
is a trademark of Analog Devices Inc.
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
World Wide Web Site: http://www.analog.com
Fax: 617/326-8703
© Analog Devices, Inc., 1997
ADP3306
ABSOLUTE MAXIMUM RATINGS*
PIN FUNCTION DESCRIPTIONS
Input Supply Voltage . . . . . . . . . . . . . . . . . . . –0.3 V to +16 V
Shutdown Input Voltage . . . . . . . . . . . . . . . . –0.3 V to +16 V
Error Flag Output Voltage . . . . . . . . . . . . . . . –0.3 V to +16 V
Noise Bypass Pin Voltage . . . . . . . . . . . . . . . . –0.3 V to +5 V
Power Dissipation . . . . . . . . . . . . . . . . . . . . Internally Limited
Operating Ambient Temperature Range . . . –55°C to +125°C
Operation Junction Temperature Range . . . . –55°C to +125°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Lead Temperature Range (Soldering 10 sec) . . . . . . . . +300°C
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . +215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . +220°C
*This is a stress rating only; operation beyond these limits can cause the device to
be permanently damaged.
TSSOP
4, 5
SOIC Mnemonic Function
1, 2
OUT
Output of the Regulator. Fixed
2.7, 3.0, 3.2, 3.3 or 5 volts
output voltage. Bypass to ground
with a 0.1
µF
or larger capaci-
tor.
Output Pins must be
connected together for proper
operation.
Noise Reduction Pin. Used for
reduction of the output noise.
(See text for details). No con-
nection if not used.
Ground Pin.
Active Low Shutdown Pin. Con-
nect to ground to disable the
regulator output. When shut-
down is not used, this pin should
be connected to the input pin.
Open Collector Output, which
goes low to indicate that the
output is about to go out of
regulation.
Regulator Input.
Input pins
must be connected together
for proper operation.
No Connect.
6
3
NR
ORDERING GUIDE
Model
ADP3306AR-2.7
ADP3306AR-3
ADP3306AR-3.2
ADP3306AR-3.3
ADP3306AR-5
ADP3306ARU-3.0
ADP3306ARU-3.3
Voltage Output
2.7 V
3.0 V
3.2 V
3.3 V
5.0 V
3.0 V
3.3 V
Package Options*
SO-8
SO-8
SO-8
SO-8
SO-8
TSSOP-14
TSSOP-14
7
8
4
5
GND
SD
Contact the factory for the availability of other output voltage options.
*SO = Small Outline; TSSOP = Thin Shrink Small Outline.
Other Members of anyCAP™ Family
1
Model
ADP3300
ADP3301
ADP3302
ADP3304
ADP3307
ADP3303
Output
Current
50 mA
100 mA
100 mA
100 mA
100 mA
200 mA
Package
Options
2
SOT-23
SO-8
SO-8
SO-8
SOT-23
SO-8
Y
R
A L
IN A
IM IC
L N
E H
R C TA
P E
T DA
9
6
10, 11
7, 8
IN
1, 2, 3,
12, 13, 14
NC
ERR
Comments
High Accuracy
High Accuracy
Dual Output
Dual Output with
Separate Grounds
High Accuracy
High Accuracy
PIN CONFIGURATIONS
14-Lead TSSOP
8-Lead SOIC
NOTES
1
See individual data sheets for detailed ordering information.
2
SO = Small Outline, SOT = Surface Mount.
NC
NC
NC
OUT
OUT
NR
GND
ADP3306
TOP VIEW
(Not to Scale)
NC
NC
NC
IN
IN
ERR
SD
OUT 1
OUT 2
8 IN
ADP3306
7 IN
6
ERR
5
SD
TOP VIEW
NR 3
(Not to Scale)
GND 4
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the ADP3306 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
REV. 0
–3–
Power technology
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