ANALOG DEVICES ADP3334 Service Manual

High Accuracy, Low I

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Adjustable Low Dropout Regulator

, anyCAP

Q

®

ADP3334

FEATURES
High Accuracy over Line and Load: 0.9% @ 25C,

1.8% over Temperature
500 mA Current Capability
Ultralow Dropout Voltage
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
–40C to +85C Ambient Temperature Range

APPLICATIONS
Cellular Phones
TFT LCD Modules
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 the 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 of 90 µA (typical) in light
load situations.

FUNCTIONAL BLOCK DIAGRAM

SD

IN

THERMAL

PROTECTION

Q1

DRIVER

GND

CC

ADP3334

g

m

BAND GAP

REF

OUT

FB

The ADP3334 is available in three different package options:

1. Excellent thermal capability, space saving 3 mm ⫻ 3 mm LFCSP.

2. Popular low profile MSOP-8.

3. Traditional thermal enhanced SOIC-8.

ADP3334

SD

GND

OUT

OUT

V

C
1F

OUT

OUT

C

R1

FB

NR

R2

IN

V

IN

C

IN

1F

IN

OFF

ON

Figure 1. Typical Application Circuit

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. 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 companies.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] www.analog.com
Fax: [phone] © 2003 Analog Devices, Inc. All rights reserved.

ADP3334–SPECIFICATIONS

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1, 2, 3

(VIN = 6.0 V, CIN = C

= 1.0 F, TA = –40C to +85C, unless otherwise noted.)

OUT

Parameter Symbol Conditions Min Typ Max Unit

OUTPUT

Voltage Accuracy

Line Regulation

Load Regulation I

Dropout Voltage V

4

4

V

OUT

DROP

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)

IL = 500 mA 200 400 mV
I

= 300 mA 140 250 mV

L

= 100 mA 60 140 mV

I

L

= 1 mA 10 mV

I
Peak Load Current I
Output Noise V

LDPK

NOISE

L

VIN = V

OUT(NOM)

+ 1 V 800 mA

f = 10 Hz–100 kHz, CL = 10 µF 27 µV rms

= 500 mA, CNR = 10 nF

I

L

f = 10 Hz–100 kHz, C

= 10 µF 45 µV rms

L

IL = 500 mA, CNR = 0 nF

GROUND CURRENT

In Regulation I

In Dropout I

In Shutdown I

5

GND

GND

GNDSD

IL = 500 mA 4.5 10 mA

= 300 mA 2.6 6 mA

I

L

= 50 mA 0.5 1.5 mA

I

L

I

= 0.1 mA 90 130 µA

L

VIN = V

= 0.1 mA

I

L

OUT(NOM)

– 100 mV 150 450 µA

SD = 6 V, VIN = 11 V 0.9 3 µA

SHUTDOWN

Threshold Voltage V

THSD

LDO OFF 2.0 V

LDO ON 0.4 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 V

5

Ground current includes current through external resistors.

Specifications subject to change without notice.

OUT(NOM)

£ 2.2 V.

SD

OSD

0 £ SD £ 5 V 1.2 3 µA

SD = 2 V, VIN = 11 V 0.01 5 µA

REV. B–2–

ADP3334

TOP VIEW

(Not to Scale)

8

7

6

5

1

2

3

4

GND

SD

IN

IN

NC

FB

OUT

OUT

ADP3334AR

NC = NO CONNECT

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ABSOLUTE MAXIMUM RATSINGS*

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 SOIC-8 . . . . . . . . . . . . . . . . . . . . . . . . 122.3°C/W

␪

JA

4-Layer SOIC-8 . . . . . . . . . . . . . . . . . . . . . . . . . 86.6°C/W

␪

JA

␪

2-Layer LFCSP-8 . . . . . . . . . . . . . . . . . . . . . . . . . . 62°C/W

JA

4-Layer LFCSP-8 . . . . . . . . . . . . . . . . . . . . . . . . . . 48°C/W

␪

JA

2-Layer MSOP-8 . . . . . . . . . . . . . . . . . . . . . . . . . 220°C/W

␪

JA

␪

4-Layer MSOP-8 . . . . . . . . . . . . . . . . . . . . . . . . . 158°C/W

JA

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

*Stresses above those listed under Absolute Maximum Ratings may cause perma-

nent 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.

PIN CONFIGURATIONS

OUT

OUT

FB

NC

1

2

3

4

ADP3334ARM

TOP VIEW

(Not to Scale)

NC = NO CONNECT

8

IN

7

IN

6

SD

5

GND

OUT

OUT

FB

NC

1

2

3

4

ADP3334ACP

TOP VIEW*

*PINS UNDERSIDE
NC = NO CONNECT

PIN FUNCTION DESCRIPTIONS

Mnemonic Function

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

turns on the regulator.

IN Regulator Input.

OUT Output. Bypass to ground with a 1.0 µF or

larger capacitor.

FB Feedback Input. FB should be connected to

an external resistor divider that sets the
output voltage.

NC No Connection.

8

IN

7

IN

6

SD

5

GND

ORDERING GUIDE

Package Package

Model Output Description Option Brand

ADP3334AR ADJ Standard Small Outline RN-8

Package (SOIC-8)

ADP3334ACP ADJ Lead Frame Chip CP-8 LLA

Scale Package (LFCSP)
3 mm ⫻ 3 mm Body, 8-Lead

ADP3334ARM ADJ MSOP Package RM-8 LLA

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.

REV. B

–3–

ADP3334–Typical Performance Characteristics

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2.202

IL = 0

2.201

2.200

2.199
150mA

2.198

2.197

300mA

2.196

OUTPUT VOLTAGE – V

2.195

2.194

24 12

500mA

6810

INPUT VOLTAGE – V

V

OUT

TPC 1. Line Regulation Output
Voltage vs. Supply Voltage

5.0
VIN = 6V

= 2.2V

V

OUT

4.0

3.0

2.0

1.0

GROUND CURRENT – mA

0

0 100 500

200 300 400

OUTPUT LOAD – mA

TPC 4. Ground Current vs.
Load Current

= 2.2V

2.201

2.200

2.199

2.198

2.197

2.196

2.195

OUTPUT VOLTAGE – V

2.194

2.193
0 100 500

200 300 400

OUTPUT LOAD – mA

V

= 2.2V

OUT

V

= 6V

IN

TPC 2. Output Voltage vs.
Load Current

0.5

0.4

0.3

0.2

0.1

0

OUTPUT CHANGE – %

500mA

–0.1

0

–0.2

–25 0 25 50 75 100

–50 125

JUNCTION TEMPERATURE – C

0mA

300mA

500mA

TPC 5. Output Voltage Variation %
vs. Junction Temperature

150

140

120

100

80

60

40

GROUND CURRENT – A

20

0

IL = 100A

IL = 0

012

24 68 10

INPUT VOLTAGE – V

V

= 2.2V

OUT

TPC 3. Ground Current vs.
Supply Voltage

8

IL = 500mA

7

6

5

300mA

4

3

100mA

2

GROUND CURRENT – mA

50mA

1

0

0

–50 125

–25 0 25 50 75 100

JUNCTION TEMPERATURE – C

VIN = 6V
V

= 2.2V

OUT

150

TPC 6. Ground Current vs.
Junction Temperature

250

V

= 2.2V

OUT

200

150

100

50

DROPOUT VOLTAGE – mV

0

0 100 500

200 300 400

OUTPUT LOAD – mA

TPC 7. Dropout Voltage vs.
Output Current

V

3.0

2.5

2.0

1.5

1.0

0.5

0

INPUT/OUTPUT VOLTAGE – V

1 234

TIME – s

OUT

SD = GND

= 4.4

R

L

TPC 8. Power-Up/Power-Down

= 2.2V

3

– V

C

= 1F

OUT

2

OUT

1

0

4

– V V

2

IN

V

0

C

= 10F

OUT

200 400 600 800

TIME – s

TPC 9. Power-Up Response

V

= 2.2V

OUT

SD = GND

= 4.4

R

L

REV. B–4–