ANALOG DEVICES ADP3338 Service Manual

High Accuracy, Ultralow IQ, 1 A,

www.BDTIC.com/ADI

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
anyCAP is 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

= 1.0 µF for stability

O

anyCAP® Low Dropout Regulator

ADP3338

FUNCTIONAL BLOCK DIAGRAM

DRIVER

IN

Q1

CC

GND

Figure 1.

ADP3338

GND

g

OUT

ADP3338

m

BANDGAP

REF

1µF

IN

THERMAL

PROTECTION

V

IN

1µF

Figure 2. Typical Application Circuit

OUT

R1

R2

02050-001

V

OUT

02050-002

GENERAL DESCRIPTION

The ADP3338 is a member of the ADP33xx family of precision,
low dropout (LDO), 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 offers 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

Rev. B

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.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.

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.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] www.analog.com
Fax: [phone] ©2005 Analog Devices, Inc. All rights reserved.

ADP3338

www.BDTIC.com/ADI

TABLE OF CONTENTS

Specifications..................................................................................... 3

Capacitor Selection .................................................................... 10

Absolute Maximum Ratings............................................................ 4

ESD Caution.................................................................................. 4

Pin Configuration and Function Descriptions............................. 5

Typical Performance Characteristics ............................................. 6

Theory of Operation ........................................................................ 9

Application Information ................................................................ 10

REVISION HISTORY

6/05—Data Sheet Changed from Rev. A to Rev. B

Added Pin Function Descriptions Table ....................................... 5

hanges to Ordering Guide.......................................................... 13

C

6/04—Data Sheet Changed from Rev. 0 to Rev. A

Updated Format .............................................................. Universal

C

hanges to Figures 5, 11, 12, 13, 14, 15..................................... 6

Updated Outline Dimensions................................................... 12

Changes to Ordering Guide...................................................... 12

Output Current Limit................................................................ 10

Thermal Overload Protection .................................................. 10

Calculating Power Dissipation ................................................. 10

Printed Circuit Board Layout Considerations ....................... 10

Outline Dimensions ....................................................................... 12

Ordering Guide .......................................................................... 13

6/01—Rev. 0: Initial Version

Rev. B | Page 2 of 16

ADP3338

www.BDTIC.com/ADI

SPECIFICATIONS

VIN = 6.0 V, CIN = C

Table 1.

Parameter

1, , 2 3

OUTPUT

Voltage Accuracy V
V
V
Line Regulation VIN = V
Load Regulation IL = 0.1 mA to 1 A, TJ = 25°C 0.006 mV/mA
Dropout Voltage V
I
I
I
Peak Load Current I
Output Noise V

GROUND CURRENT

In Regulation I
I
I
I
In Dropout I

1

All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC) methods.

2

Application stable with no load.

3

VIN = 2.7 V for models with V

= 1 µF, TJ = −40°C to +125°C, unless otherwise noted.

OUT

Symbol Conditions Min Typ Max Unit

OUT

DROP

LDPK

NOISE

GND

GND

OUTNOM

VIN = V

= V

IN

= V

IN

V

= 98% of V

OUT

= 1 A 190 400 mV

L

= 500 mA 125 200 mV

L

= 100 mA 70 150 mV

L

VIN = V
f = 10 Hz to 100 kHz, CL = 10 µF, IL = 1 A 95 µV rms

IL = 1 A 9 30 mA

= 500 mA 4.5 15 mA

L

= 100 mA 0.9 3 mA

L

= 0.1 mA 110 190 µA

L

VIN = V

≤ 2.2 V.

+ 0.4 V to 8 V, IL = 0.1 mA to 1 A, TJ = 25°C −0.8 +0.8 %

OUTNOM

+ 0.4 V to 8 V, IL = 0.1 mA to 1 A, TJ = −40°C to +125°C −1.4 +1.4 %

OUTNOM

+ 0.4 V to 8 V, IL = 50 mA to 1 A, TJ = 150°C −1.6 +1.6 %

OUTNOM

+ 0.4 V to 8 V, TJ = 25°C 0.04 mV/V

OUTNOM

OUTNOM

+ 1 V 1.6 A

OUTNOM

– 100 mV, IL = 0.1 mA 190 600 µA

OUTNOM

Rev. B | Page 3 of 16

ADP3338

www.BDTIC.com/ADI

ABSOLUTE MAXIMUM RATINGS

Unless otherwise specified, all voltages are referenced to GND.

Table 2.

Parameter Rating

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

θ

JC

Storage Temperature Range −65°C to +150°C
Lead Temperature (Soldering 10 sec) 300°C
Vapor Phase (60 sec) 215°C
Infrared (15 sec) 220°C

62.3°C/W

26.8°C/W

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.

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 indicated in the operational
section 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.

Rev. B | Page 4 of 16

ADP3338

www.BDTIC.com/ADI

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

IN

3

ADP3338

OUT

NOTE: PIN 2 AND TAB ARE INTERNALLY CONNECTED

TOP VIEW

(Not to Scale)

Figure 3. Pin Configuration

Table 3. Pin Function Descriptions

Pin No. Mnemonic Description

1 GND Ground Pin.
2 OUT Regulator Output. Bypass to ground with a 1 µF or larger capacitor.
3 IN Regulator Input. Bypass to ground with a 1 µF or larger capacitor.

OUT

22

GND

1

02050-003

Rev. B | Page 5 of 16