ADP3338 0

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a
High-Accuracy Ultralow I
Q
, 1 A, anyCAP
®
Low Dropout Regulator
ADP3338
FEATURES
High Accuracy Over Line and Load:
0.8% @ 25
C,
1.4% Over Temperature
Ultralow Dropout Voltage: 190 mV (Typ) @ 1 A
Requires Only C
O
= 1
F for Stability
anyCAP = Stable with Any Type of Capacitor
(Including MLCC)
Current and Thermal Limiting
Low Noise
2.7 V to 8 V Supply Range
–40
C to +85
C Ambient Temperature Range
SOT-223 Package
FUNCTIONAL BLOCK DIAGRAM
IN
Q1
OUT
THERMAL
PROTECTION
ADP3338
R1
CC
DRIVER
g
m
R2
BANDGAP
REF
APPLICATIONS
Notebook, Palmtop Computers
SCSI Terminators
Battery-Powered Systems
Bar Code Scanners
Camcorders, Cameras
Home Entertainment Systems
Networking Systems
DSP/ASIC Supply
GND
GENERAL DESCRIPTION
The ADP3338 is a member of the ADP33xx family of precision
low dropout anyCAP voltage regulators. The ADP3338 oper-
ates with an input voltage range of 2.7 V to 8 V and delivers a
load current up to 1 A. The ADP3338 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 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
ADP3338 achieves exceptional accuracy of ± 0.8% at room
temperature and ± 1.4% over temperature, line and load varia-
tions. The dropout voltage of the ADP3338 is only 190 mV
(typical) at 1 A. This device also includes a safety current limit
and thermal overload protection. The ADP3338 has ultralow
quiescent current 110 µA (typical) in light load situations.
ADP3338
V
IN
IN
OUT
V
OUT
1
F
1
F
GND
Figure 1. Typical Application Circuit
anyCAP is a registered 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 that
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: 781/329-4700
www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2001
ADP3338–SPECIFICATIONS
1, 2, 3
(V
IN
= 6.0 V, C
IN
= C
OUT
= 1
F, T
J
= –40
C to +125
C, unless otherwise
noted.)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
OUTPUT
Voltage Accuracy
V
OUT
V
IN
= V
OUTNOM
+ 0.4 V to 8 V
–0.8
+0.8
%
I
L
= 0.1 mA to 1 A
T
J
= 25°C
V
IN
= V
OUTNOM
+ 0.4 V to 8 V
–1.4
+1.4
%
I
L
= 0.1 mA to 1 A
T
J
= –40°C to +125°C
V
IN
= V
OUTNOM
+ 0.4 V to 8 V
–1.6
+1.6
%
I
L
= 50 mA to 1 A
T
J
= 150 °C
Line Regulation
V
IN
= V
OUTNOM
+ 0.4 V to 12 V
0.04
mV/V
T
J
= 25°C
Load Regulation
I
L
= 0.1 mA to 1 A
0.006
mV/mA
T
J
= 25°C
Dropout Voltage
V
DROP
V
OUT
= 98% of V
OUTNOM
I
L
= 1 A
190
400
mV
I
L
= 500 mA
125
200
mV
I
L
= 100 mA
70
150
mV
Peak Load Current
I
LDPK
V
IN
= V
OUTNOM
+ 1 V
1.6
A
Output Noise
V
NOISE
f = 10 Hz–100 kHz, C
L
= 10 µF
95
µV rms
I
L
= 1 A
GROUND CURRENT
In Regulation
I
GND
I
L
= 1 A
9
30
mA
I
L
= 500 mA
4.5
15
mA
I
L
= 100 mA
0.9
3
mA
I
L
= 0.1 mA
110
190
µ
A
In Dropout
I
GND
V
IN
= V
OUTNOM
– 100 mV
190
600
µ
A
I
L
= 0.1 mA
NOTES
1
All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods.
2
Application stable with no load.
3
V
IN
= 2.7 V for models with V
OUTNOM
≤
–2–
REV. 0
2.2 V.
Specifications subject to change without notice.
ADP3338
ABSOLUTE MAXIMUM RATINGS
*
Input Supply Voltage . . . . . . . . . . . . . . . . . . –0.3 V to +8.5 V
Power Dissipation . . . . . . . . . . . . . . . . . . . Internally Limited
Operating Ambient Temperature Range . . . . –40°C to +85°C
Operating Junction Temperature Range . . . –40°C to +150°C
θ
JA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62.3°C/W
θ
JC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26.8°C/W
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. Unless otherwise specified, all voltages are referenced
to GND.
PIN FUNCTION DESCRIPTIONS
Pin
No.
Mnemonic Function
1
GND
Ground Pin.
2
OUT
Output of the Regulator. Bypass to
ground with a 1 µF or larger capacitor.
3
IN
Regulator Input. Bypass to ground with
a 1 µF or larger capacitor.
PIN CONFIGURATION
3
2
1
IN
ADP3338
OUT
OUT
GND
TOP VIEW
(Not to Scale)
ORDERING GUIDE
Output
Package
Package
Model
Voltage
*
Option
Description
ADP3338AKC-1.8
1.8 V
KC (SOT-223)
Plastic Surface Mount
ADP3338AKC-2.5
2.5 V
KC (SOT-223)
Plastic Surface Mount
ADP3338AKC-2.85
2.85 V
KC (SOT-223)
Plastic Surface Mount
ADP3338AKC-3.3
3.3 V
KC (SOT-223)
Plastic Surface Mount
ADP3338AKC-5
5 V
KC (SOT-223)
Plastic Surface Mount
*
Contact the factory for other voltage options.
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 ADP3338 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–
ADP3338
–Typical Performance Characteristics
(T
A
= 25
C unless otherwise noted.)
2.515
2.504
2.503
300
V
IN
= 6V
V
OUT
= 2.5V
V
OUT
= 2.5V
I
LOAD
= 0A
I
L
= 0A
250
2.510
2.502
I
L
= 0.5A
2.501
200
2.505
2.500
I
L
= 1A
2.499
150
2.500
2.498
100
2.497
2.495
50
2.496
2.495
2.490
2.5
0
4.5
6.5
8.5
10.5
12.5
0
0.2
0.4
0.6
0.6
0.8 1.0
0
2
4
6
8
10
12
INPUT VOLTAGE – V
LOAD CURRENT – A
INPUT VOLTAGE – V
TPC 1. Line Regulation Output
Voltage vs. Supply Voltage
TPC 2. Output Voltage vs. Load
Current
TPC 3. Ground Current vs. Supply
Voltage
12
0.4
18
V
OUT
= 2.5V
V
IN
= 6V
V
OUT
= 2.5V
V
IN
= 6V
I
L
= 1A
16
I
LOAD
= 1A
I
L
= 0.7A
I
LOAD
= 700mA
I
LOAD
= 500mA
I
LOAD
= 300mA
10
0.3
14
I
L
= 0.5A
8
12
I
L
= 0.3A
0.2
10
6
8
4
0.1
6
IL = 0A
4
2
0
2
0
0
0.2
0.4
0.6
0.8
1.0
–0.05
–40 –20 0
20 40 60 80 100 120
–40
–20 0 20 40 60 80 100 120 140 150
OUTPUT LOAD – A
JUNCTION TEMPERATURE –
C
JUNCTION TEMPERATURE –
C
TPC 4. Ground Current vs. Load
Current
TPC 5. Output Voltage Variation %
vs. Junction Temperature
TPC6. GroundCurrentvs.Junction
Temperature
250
V
OUT
= 2.5V
C
OUT
= 1
V
OUT
= 2.5V
3
V
OUT
= 2.5V
R
LOAD
= 2.5
2.51
F
R
LOAD
= 2.5
200
2.50
2.49
2
150
1
100
4.5
0
3.5
50
01234567890
TIME – sec
80
120
140
180
TIME –
s
0
0
0.2
0.4
0.6
0.8
1.0
LOAD CURRENT – A
TPC 7. Dropout Voltage vs.
Load Current
TPC 8. Power-Up/Power-Down
TPC 9. Line Transient Response
–4–
REV. 0
ADP3338
V
OUT
= 2.5V
C
OUT
= 10
T
V
IN
= 6V
C
OUT
= 1
F
R
LOAD
= 2.5
T
V
IN
= 6V
C
OUT
= 10
F
2.51
F
R
LOAD
= 2.5
2.6
2.6
2.50
2.49
2.5
2.4
2.5
2.4
1
1
4.5
3.5
0
0
80
120
140
180
200
300
600
800
200
400
600
800
TIME –
s
TIME –
s
TIME –
s
TPC 10. Line Transient Response
TPC 11. Load Transient Response
TPC 12. Load Transient Response
0
300
V
OUT
= 2.5V
2.5
–10
0.0
–20
C
L
= 1
F
250
I
L
= 1A
400m
SHORT
–30
C
L
= 10
F
200
FULL SHORT
I
L
= 1A
1.5
–40
V
IN
= 6V
1.0
0.5
–50
150
–60
I
L
= 1A
100
–70
0.0
–80
C
L
= 1
F
I
L
= 0
C
L
= 10
F
50
0.4
0.6
0.8
1
I
L
= 0
–90
TIME – s
I
L
= 0A
0
0
10
100
1k
10k
100k
1M
10
20
30
40
50
FREQUENCY – Hz
C
L
–
F
TPC 13. Short-Circuit Current
TPC 14. Power Supply Ripple
Rejection
TPC 15. RMS Noise vs. C
L
(10 Hz–100 kHz)
100
10
C
L
= 1
F
1
0.1
C
L
= 10
F
0.01
0.001
10
100
1k
10k
100k
1M
FREQUENCY – Hz
TPC 16. Output Noise Density
REV. 0
–5–
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