Analog Devices ADP3334AR Datasheet

a

C

NR

ADP3334

OUT

V

IN

IN

GND

V

OUT

ON

OFF

IN

OUT

R1

R2

SD

C

IN

1␮F

FB

C

OUT

1␮F

anyCAP

High Accuracy Low IQ, 500 mA

®

Adjustable Low Dropout Regulator

ADP3334

FEATURES
High Accuracy Over Line and Load: ⴞ0.9% @ 25ⴗC,

ⴞ1.8% over Temperature
Ultralow Dropout Voltage: 200 mV (Typ) @ 500 mA
Requires Only C

= 1.0 ␮F for Stability

O

anyCAP = Stable with Any Type of Capacitor

(Including MLCC)
Current and Thermal Limiting
Low Noise
Low Shutdown Current: < 1.0 ␮A (Typ)

2.6 V to 11 V Supply Range

1.5 V to 10 V Output Range
–40ⴗC to +85ⴗC Ambient Temperature Range
Thermally-Enhanced 8-Lead SO Package

APPLICATIONS
Cellular Phones
Camcorders, Cameras
Networking Systems, DSL/Cable Modems
Cable Set-Top Boxes
DSP Supplies
Personal Digital Assistants

GENERAL DESCRIPTION

The ADP3334 is a member of the ADP333x family of precision
low dropout anyCAP voltage regulators. The ADP3334 operates
with an input voltage range of 2.6 V to 11 V and delivers a
continuous load current up to 500 mA. The novel anyCAP
architecture requires only a very small 1 µF output capacitor for
stability, and the LDO is insensitive to the capacitor’s equiva­lent series resistance (ESR). This makes ADP3334 stable with any
capacitor, including ceramic (MLCC) types for space restricted
applications.

The ADP3334 achieves exceptional accuracy of ±0.9% at room
temperature and ±1.8% over temperature, line, and load. The
dropout voltage of the ADP3334 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
ADP3334 has low quiescent current 90 µA (typical) in light
load situations.

FUNCTIONAL BLOCK DIAGRAM

SD

IN

THERMAL

PROTECTION

Q1

DRIVER

GND

CC

ADP3334

g

m

BANDGAP

REF

OUT

FB

Figure 1. Typical Application Circuit

The ADP3334 also features ADI’s thermally enhanced Thermal
Coastline package. This allows 1 W of power dissipation without
any external heat sinking.

anyCAP is a registered trademark of Analog Devices, Inc.

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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: [phone] www.analog.com
Fax: [phone] © Analog Devices, Inc., 2001

ADP3334–SPECIFICA TIONS

Parameter Symbol Conditions Min Typ Max Unit

OUTPUT

Voltage Accuracy

Line Regulation

Load Regulation I
Dropout Voltage V

Peak Load Current I
Output Noise V

GROUND CURRENT

In Regulation I

In Dropout I
In Shutdown I

SHUTDOWN

Threshold Voltage V
SD Input Current I

Output Current In Shutdown I

NOTES

1

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

2

Ambient temperature of 85°C corresponds to a junction temperature of 125°C under pulsed full load test conditions.

3

Application stable with no load.

4

VIN = 2.6 V to 11 V for models with V

5

Ground current includes current through external resistors.

Specifications subject to change without notice.

4

4

5

OUT(NOM)

V

OUT

DROP

LDPK

NOISE

GND

GND

GNDSD

THSD

SD
OSD

≤ 2.2 V.

(VIN = 6.0 V, CIN = C

VIN = V
I
T
V
I
T
V
I
T
VIN = V
I
T

T
V

OUT(NOM)

= 0.1 mA to 500 mA

L

= 25°C

A

= V

IN

OUT(NOM)

= 0.1 mA to 500 mA

L

= 85°C

A

= V

IN

OUT(NOM)

= 0.1 mA to 500 mA

L

= 150°C

J

OUT(NOM)

= 0.1 mA

L

= 25°C

A

= 0.1 mA to 500 mA 0.04 mV/mA

L

= 25°C

A

= 98% of V

OUT

+ 0.4 V to 11 V –0.9 +0.9 %

+ 0.4 V to 11 V –1.8 +1.8 %

+ 0.4 V to 11 V –2.3 +2.3 %

+ 0.4 V to 11 V 0.04 mV/V

OUT(NOM)

= 1.0 ␮F, TA = –40ⴗC to +85ⴗC, unless otherwise noted.)

OUT

IL = 500 mA 200 400 mV

= 300 mA 140 250 mV

I

L

I

= 100 mA 60 140 mV

L

= 1 mA 10 mV

I

L

VIN = V

OUT(NOM)

+ 1 V 800 mA

f = 10 Hz–100 kHz, CL = 10 µF27µV rms

= 500 mA, CNR = 10 nF

I

L

f = 10 Hz–100 kHz, C

= 10 µF45µV rms

L

IL = 500 mA, CNR = 0 nF

IL = 500 mA 4.5 10 mA
I

= 300 mA 2.6 6 mA

L

I

= 50 mA 0.5 1.5 mA

L

= 0.1 mA 90 130 µA

I

L

VIN = V
I

= 0.1 mA

L

OUT(NOM)

– 100 mV 150 450 µA

SD = 6 V, VIN = 11 V 0.9 3 µA

LDO OFF 2.0 V
LDO ON 0.4 V
0 ≤ SD ≤ 5 V 1.2 3 µA
TA = 25°C, VIN = 11 V 0.01 5 µA
TA = 85°C, VIN = 11 V 0.01 5 µA

1, 2, 3

–2–

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ADP3334

WARNING!

ESD SENSITIVE DEVICE

TOP VIEW

(Not to Scale)

8

7

6

5

1

2

3

4

GND

SD

IN
IN

NC
FB
OUT
OUT

ADP3334

NC = NO CONNECT

ABSOLUTE MAXIMUM RATINGS*

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

Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C

2-Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122.3°C/W

␪

JA

␪

4-Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86.6°C/W

JA

Lead Temperature Range (Soldering 6 sec) . . . . . . . . . 300°C

*This is a stress rating only; operation beyond these limits can cause the device

to be permanently damaged.

ORDERING GUIDE

Model Output Package Package

Description Option

ADP3334AR ADJ Standard Small SO-8

Outline Package
(SOIC-8)

PIN FUNCTION DESCRIPTIONS

Pin
No. Mnemonic Function

1 GND Ground Pin.
2 SD Shutdown Control. Pulling this pin low

turns on the regulator.

3, 4 IN Regulator Input.
5, 6 OUT Output. Bypass to ground with a 1.0 µF

or larger capacitor.

7 FB Feedback Input. FB should be connected

to an external resistor divider which sets
the output voltage.

8 NC No connection.

PIN CONFIGURATION

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 ADP3334 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.

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–3–