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ADP3338AKC-1.8-RL-ADP3338AKC-1.8RL7-ADP3338AKC-2.5-RL-ADP3338AKC-2.5-RL7-ADP3338AKC-2.85-R7-ADP3338AKC-3.0-RL7-ADP3338AKC-5-REEL
High Accuracy Ultralow Quiscent Current, 1A, anyCAP® Dropout Regulator
High Accuracy, Ultralow IQ, 1 A,
anyCAP® Low Dropout Regulator
Rev. A
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 CO = 1.0 µF 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
APPLICATIONS
Notebook, palmtop computers
SCSI terminators
Battery-powered systems
Bar code scanners
Camcorders, cameras
Home entertainment systems
Networking systems
DSP/ASIC supplies
GENERAL DESCRIPTION The ADP3338 is a member of the ADP33xx family of precision,
low dropout, anyCAP voltage regulators. The ADP3338 operates
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 conventional
LDOs with a novel architecture and an enhanced process that
allows 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 variations. The dropout voltage
of the ADP3338 is only 190 mV (typical) at 1 A. The device also
includes a safety current limit and thermal overload protection.
The ADP3338 has ultralow quiescent current: 110 µA (typical)
in light load situations.
FUNCTIONAL BLOCK DIAGRAM
GNDFigure 1.
VIN
1µF
VOUT02050-0-002
Figure 2. Typical Application Circuit
TABLE OF CONTENTS Specifications.....................................................................................3
Absolute Maximum Ratings............................................................4
ESD Caution..................................................................................4
Pin Configuration and Function Descriptions.............................5
Typical Performance Characteristics.............................................6
Theory of Operation........................................................................9
Application Information................................................................10
Capacitor Selection....................................................................10
Output Current Limit................................................................10
Thermal Overload Protection..................................................10
Calculating Power Dissipation.................................................10
Printed Circuit Board Layout Considerations........................10
Outline Dimensions.......................................................................12
Ordering Guide..........................................................................12
REVISION HISTORY
6/04—Data Sheet Changed from Rev. 0 to Rev. A Updated Format..............................................................Universal
Changes to Figures 5, 11, 12, 13, 14, 15......................................6
Updated Outline Dimensions...................................................12
Changes to Ordering Guide......................................................12
6/01—Rev. 0: Initial Version
SPECIFICATIONS1, , 23VIN = 6.0 V, CIN = COUT = 1 µF, TJ = −40°C to +125°C, unless otherwise noted.
Table 1. 1All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC) methods. Application stable with no load.
3VIN = 2.7 V for models with VOUTNOM ≤ 2.2 V.
ABSOLUTE MAXIMUM RATINGS Unless otherwise specified, all voltages are referenced to GND.
Table 2. Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those listed in the operational sections
of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability. Only one absolute maximum rating may be
applied at any one time.
ESD 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 this product 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.
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
OUTOUT
GND02050-0-003
NOTE: PIN 2 AND TAB ARE INTERNALLY CONNECTED Figure 3. 3-Lead SOT-223 Pin Configuration
Table 3. Pin Function Descriptions TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted.
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
2.495Figure 4. Line Regulation Output Voltage vs. Input Voltage
OUTPUT VOLTAGE (V)
2.49502050-0-005
LOAD CURRENT (A)0.81.00.60.40.2Figure 5. Output Voltage vs. Load Current
INPUT VOLTAGE (V)
GROUND CURRE
NT (048
30002050-0-006
OUTPUT LOAD (A)
GROUND CURRE
NT (mA)00.20.40.60.8
1.002050-0-007
Figure 7. Ground Current vs. Load Current
JUNCTION TEMPERATURE (°C)
OUTPUT VOLTAGE (%)
0.402050-0-008
Figure 8. Output Voltage Variation % vs. Junction Temperature
JUNCTION TEMPERATURE (°C)
GROUND CURRE
NT (mA)02050-0-009
