Analog Devices ADP3335 a Datasheet

High Accuracy, Ultralow IQ, 500 mA,

FEATURES

High accuracy over line and load: ±0.9% @ 25°C,

±1.8% over temperature
Ultralow dropout voltage: 200 mV (typ) @ 500 mA
Requires only C
anyCAP = stable with any type of capacitor

(Including MLCC)
Current and thermal limiting
Low noise
Low shutdown current: < 10 nA (typ)

2.6 V to 12 V supply range
–40°C to +85°C ambient temperature range

APPLICATIONS

PCMCIA cards
Cellular phones
Camcorders, cameras
Networking systems, DSL/cable modems
Cable set-top box
MP3/CD players
DSP supplies

= 1.0 µF for stability

O

anyCAP® Low Dropout Regulator

ADP3335

FUNCTIONAL BLOCK DIAGRAM

SD

IN

THERMAL

PROTECTION

Q1

DRIVER

GND

CC

ADP3335

gm

BANDGAP

REF

+
–

Figure 1.

5

NR

ADP3335

3

OUT
OUT
OUT
GND

2
1

++

4

C
1µF

OUT

V

OUT

IN

7

V

IN

1µF

8

OFF

IN

SD

6

ON

C

IN

Figure 2. Typical Application Circuit

R1

R1

R2

00147-0-002

OUT

NR

00147-0-001

GENERAL DESCRIPTION

The ADP3335 is a member of the ADP333x family of precision,
low dropout, anyCAP voltage regulators. It operates with an
input voltage range of 2.6 V to 12 V, and delivers a continuous
load current up to 500 mA. The ADP3335 stands out from
conventional low dropout regulators (LDOs) by using an
enhanced process enabling it to offer performance advantages
beyond its competition. Its patented design requires only a

1.0 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)

Rev. A

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.

types for space-restricted applications. The ADP3335 achieves
exceptional accuracy of ±0.9% at room temperature and ±1.8%
over temperature, line, and load.

The dropout voltage of the ADP3335 is only 200 mV (typical) at
500 mA. This device also includes a safety current limit, thermal
overload protection, and a shutdown feature. In shutdown
mode, the ground current is reduced to less than 1 µA. The
ADP3335 has a low quiescent current of 80 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] © 2004 Analog Devices, Inc. All rights reserved.

ADP3335

TABLE OF CONTENTS

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

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

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

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

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

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

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

Input Bypass Capacitor .............................................................. 10

REVISION HISTORY

1/04 changed from Rev. 0 to Rev. A

Format updated...............................................................Universal

Renumbered figures .......................................................Universal

Removed Figure 22....................................................................... 6

Change to Printed Circuit Board

Layout Considerations section.................................................. 11

Added LFCSP Layout Considerations section........................ 11

Added Package Drawing................................................Universal

Changes to Ordering Guide...................................................... 16

Noise Reduction ......................................................................... 10

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

Calculating Junction Temperature........................................... 10

Printed Circuit Board Layout Considerations........................ 11

LFCSP Layout Considerations.................................................. 11

Shutdown Mode ......................................................................... 11

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

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

Rev. A | Page 2 of 16

ADP3335

SPECIFICATIONS

All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC) methods. Ambient
temperature of 85°C corresponds to a junction temperature of 125°C under pulsed full-load test conditions. Application stable with no
load. V

Table 1.

Parameter Symbol Conditions Min Typ Max Unit

OUTPUT

I
T
V
I
T
V
I
T

I
T

T

I
I
I
I

I
f = 10 Hz to 100 kHz, CL = 10 µF 95 µV rms
I
GROUND CURRENT

I
I
I

I

SHUTDOWN

OFF 0.4 V

1

VIN = 2.6 V to 12 V for models with V

= 6.0 V, C = C = 1.0 µF, T = –40°C to +85°C, unless otherwise noted.

IN IN OUT A

Voltage Accuracy

Line Regulation1 V

1

V

VIN = V

OUT

+ 0.4 V to 12 V –0.9 +0.9 %

OUT(NOM)

= 0.1 mA to 500 mA

L

= 25°C

A

= V

IN

= 0.1 mA to 500 mA

L

= 85°C

A

= V

IN

= 0.1 mA to 500 mA

L

= 150°C

J

= V

IN

= 0.1 mA

L

= 25°C

A

+ 0.4 V to 12 V –1.8 +1.8 %

OUT(NOM)

+ 0.4 V to 12 V –2.3 +2.3 %

OUT(NOM)

+ 0.4 V to 12 V 0.04 mV/V

OUT(NOM)

Load Regulation IL = 0.1 mA to 500 mA 0.04 mV/mA

= 25°C

A

Dropout Voltage V

Peak Load Current I

Output Noise V

In Regulation I

In Dropout I

In Shutdown

Threshold Voltage

SD

Input Current

Output Current in Shutdown

≤ 2.2 V.

OUT(NOM)

V

DROP

VIN = V

LDPK

f = 10 Hz to 100 kHz, CL = 10 µF 47 µV rms

NOISE

IL = 500 mA 4.5 10 mA

GND

VIN = V

GND

I

GNDSD

V

THSD

I

SD

I

OSD

= 98% of V

OUT

= 500 mA 200 370 mV

L

= 300 mA 140 230 mV

L

= 50 mA 30 110 mV

L

= 0.1 mA 10 40 mV

L

+ 1 V 800 mA

OUT(NOM)

= 500 mA, CNR = 10 nF

L

= 500 mA, CNR = 0 nF

L

= 300 mA 2.6 6 mA

L

= 50 mA 0.5 2.5 mA

L

= 0.1 mA 80 110 µA

L

– 100 mV 120 400 µA

OUT(NOM)

= 0.1 mA

L

SD

= 0 V, VIN = 12 V

OUT(NOM)

0.01 1 µA

ON 2.0 V

0 ≤ SD ≤ 5 V
VIN = 12 V, V

= 0 V 0.01 5 µA

OUT

1.2 3 µA

Rev. A | Page 3 of 16

ADP3335

ABSOLUTE MAXIMUM RATINGS

Table 2.

Parameter Rating

Input Supply Voltage –0.3 V to +16 V
Shutdown Input Voltage –0.3 V to +16 V
Power Dissipation Internally Limited
Operating Ambient Temperature Range –40°C to +85°C
Operating Junction Temperature Range –40°C to +150°C
θJA, 2-layer MSOP-8 220°C/W
θJA, 4-layer MSOP-8 158°C/W
θJA, 2-layer LFCSP-8 62°C/W
θJA, 4-layer LFCSP-8 48°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

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 listed in the operational sections
of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.

Rev. A | Page 4 of 16

ADP3335

PIN CONFIGURATIONS AND FUNCTIONAL DESCRIPTIONS

1

OUT

ADP3335

OUT

2

OUT

GND

TOP VIEW

3

(Not to Scale)

4

Figure 3. 8-Lead MSOP

8

IN
IN

7

SD

6

NR

5

00147-0-022

1

OUT

ADP3335

OUT

2

OUT

GND

TOP VIEW

3

(Not to Scale)

4

Figure 4. 8-Lead LFCSP

8

IN
IN

7

SD

6

NR

5

00147-0-025

Table 3. Pin Function Descriptions

Pin No. Mnemonic Function

1, 2, 3 OUT

Output of the Regulator. Bypass to ground with a 1.0 µF or larger capacitor. All pins must be connected together

for proper operation.
4 GND Ground Pin.
5 NR

Noise Reduction Pin. Used for further reduction of output noise (see the Noise Reduction section for further

details).
6

SD

Active Low Shutdown Pin. Connect to ground to disable the regulator output. When shutdown is not used, this

pin should be connected to the input pin.
7, 8 IN Regulator Input. All pins must be connected together for proper operation.

Rev. A | Page 5 of 16