ANALOG DEVICES ADP3331 Service Manual

a

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Adjustable Output Ultralow IQ, 200 mA,

®

SOT-23, anyCAP

Low Dropout Regulator

ADP3331

FEATURES
High Accuracy over Line and Load: ⴞ0.7% @ 25ⴗC,

1.4% over Temperature
Ultralow Dropout Voltage: 140 mV (Typ) @ 200 mA
Can Be Used as a High Current (>1 A) LDO

Controller

Requires Only C

= 0.47 ␮F for Stability

O

anyCAP = Stable with Any Type of Capacitor

(Including MLCC)
Current and Thermal Limiting
Low Noise
Low Shutdown Current: 10 nA Typical

2.6 V to 12 V Supply Range

1.5 V to 11.75 V Output Range
–40ⴗC to +85ⴗC Ambient Temperature Range
Ultrasmall Thermally Enhanced Chip-on-Lead™

SOT-23-6 Lead Package

APPLICATIONS
Cellular Telephones
Notebook, Palmtop Computers
Battery-Powered Systems
PCMCIA Regulators
Bar Code Scanners
Camcorders, Cameras

ERR

SD

FUNCTIONAL BLOCK DIAGRAM

IN

THERMAL

PROTECTION

Q2

V

IN

0.47␮F

C1

IN

+

Q1

CC

DRIVER

GND

ERR

ADP3331

OUT

OFF

ON

GND

FB

SD

64

R3
330k⍀

R1

R2

ADP3331

g

m

BAND GAP

+

REF

E

V

C2

0.47␮F

OUT

OUT

OUT

FB

Figure 1. Typical Application Circuit

GENERAL DESCRIPTION

The ADP3331 is a member of the ADP330x family of precision
low dropout anyCAP voltage regulators. The ADP3331 operates
with an input voltage range of 2.6 V to 12 V and delivers a load
current up to 200 mA. The ADP3331 stands out from the
conventional LDOs with a novel architecture and an enhanced
process that enables it to offer performance advantages and higher
output current than its competition. Its patented design requires
only a 0.47 mF output capacitor for stability. This device is insensi-
tive to capacitor equivalent series resistance (ESR), and is stable
with any good quality capacitor, including ceramic (MLCC) types

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. 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.

for space restricted applications. The ADP3331 achieves excep­tional accuracy of ± 0.7% at room temperature and ±1.4% overall
accuracy over temperature, line, and load variations. The drop­out voltage of the ADP3331 is only 140 mV (typical) at 200 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 2 mA. The ADP3331 has
ultralow quiescent current 34 mA (typical) in light load situations.
The SOT-23-6 package has been thermally enhanced using
Analog Device’s proprietary Chip-on-Lead feature to maxi­mize power dissipation.

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.

ADP3331–SPECIFICATIONS

www.BDTIC.com/ADI

(TA = –40ⴗC to +85ⴗC, VIN = 7 V, CIN = 0.47 ␮F, C

1, 2

noted.)

= 0.47 ␮F, unless otherwise

OUT

Parameter Symbol Conditions Min Typ Max Unit

OUTPUT VOLTAGE ACCURACY

HIGH OUTPUT VOLTAGE RANGE V

3

VIN = V

I
T
V
V
I
T
V
V
I

OUTNOM

OUTNOM

= 0.1 mA to 200 mA,

L

= 25∞C –0.7 +0.7 %

A

= V

IN

OUTNOM

OUTNOM

= 0.1 mA to 150 mA,

L

= –40∞C to +85∞C –1.4 +1.4 %

A

= V

IN

OUTNOM

OUTNOM

= 0.1 mA to 200 mA,

L

+ 0.25 V to 12 V,

≥ 2.35 V,

+ 0.25 V to 12 V,

≥ 2.35 V,

+ 0.25 V to 12 V,

≥ 2.35 V,

TA = –20∞C to +85∞C –1.4 +1.4 %

OUTPUT VOLTAGE ACCURACY

3

LOW OUTPUT VOLTAGE RANGE V

VIN = 2.6 V to 12 V,

OUTNOM

I

L

T

A

V

IN

V

OUTNOM

I

L

T

A

V

IN

V

OUTNOM

I

L

= 1.5 V to 2.35 V,

= 0.1 mA to 200 mA,

= 25∞C –0.7 +0.7 %

= 2.6 V to 12 V,

= 1.5 V to 2.35 V,

= 0.1 mA to 150 mA,

= –40∞C to +85∞C –1.4 +1.4 %

= 2.6 V to 12 V,

= 1.5 V to 2.35 V,

= 0.1 mA to 200 mA,

TA = –20∞C to +85∞C –1.4 +1.4 %

LINE REGULATION DV

DV

LOAD REGULATION DV

DI

GROUND CURRENT I

GND

O

IN

O

L

VIN = V

OUTNOM

TA = 25∞C 0.06 mV/V

IL= 0.1 mA to 200 mA
TA = 25∞C 0.04 mV/mA

IL = 200 mA, TA = –20∞C to +85∞C 1.6 4.0 mA

= 150 mA 1.2 3.1 mA

I

L

= 50 mA 0.4 1.1 mA

I

L

+ 0.25 V to 12 V

IL = 0.1 mA 34 50 mA

GROUND CURRENT I

GND

VIN = V

OUTNOM

– 100 mV

IN DROPOUT IL = 0.1 mA 37 55 mA

DROPOUT VOLTAGE

2

V

DROP

V

= 98% of V

OUT

OUTNOM

IL = 200 mA, TA = –20∞C to +85∞C 0.14 0.23 V
I

= 150 mA 0.11 0.17 V

L

= 10 mA 0.042 0.06 V

I

L

IL = 1 mA 0.025 0.05 V

PEAK LOAD CURRENT I

OUTPUT NOISE V

SHUTDOWN THRESHOLD V

LDPK

NOISE

THSD

VIN = V

OUTNOM

+ 1 V 300 mA

f = 10 Hz–100 kHz, CL = 10 mF
I

= 200 mA, CNR = 10 nF, V

L

f = 10 Hz–100 kHz, C

= 10 mF

L

IL = 200 mA, CNR = 0 nF, V

= 3 V 47 mV rms

OUT

= 3 V 95 mV rms

OUT

ON 2.0 V
OFF 0.4 V

SHUTDOWN PIN INPUT CURRENT I

SD

0 < SD £ 12 V 1.9 9 mA
0 < SD £ 5 V 1.4 6 mA

GROUND CURRENT IN

SHUTDOWN MODE I

GNDSD

SD = 0 V, VIN = 12 V 0.01 2 mA

–2–

REV. A

ADP3331

www.BDTIC.com/ADI

Parameter Symbol Conditions Min Typ Max Unit

OUTPUT CURRENT IN I

OSD

SHUTDOWN MODE TA = 85∞C @ VIN = 12 V 2 mA

ERROR PIN OUTPUT LEAKAGE I

EL

ERROR PIN OUTPUT

LOW VOLTAGE V

NOTES

1

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

2

Application stable with no load.

3

Assumes the use of ideal resistors. Overall accuracy also depends on the tolerance of the external resistors used to set the output voltage.

Specifications subject to change without notice.

EOL

TA = 25∞C @ VIN = 12 V 1 mA

VEO = 5 V 1 mA

I

= 400 mA 0.19 0.40 V

SINK

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 +125∞C

(4-Layer Board) . . . . . . . . . . . . . . . . . . . . . . . . 165∞C/W

q

JA

q

(2-Layer Board) . . . . . . . . . . . . . . . . . . . . . . . . 190∞C/W

JA

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

*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.

ORDERING GUIDE

Output

Model Voltage Package Option Branding

ADP3331ART ADJ RT-6 (SOT-23-6) L9B

PIN CONFIGURATION

OUT

ERR

1

2

IN

3

ADP3331

TOP VIEW

(Not to Scale)

6

SD

5

FB

4

GND

PIN FUNCTION DESCRIPTIONS

Pin Name Function

1 OUT Output of the Regulator. Bypass to ground

with a 0.47 mF or larger capacitor.

2INRegulator Input.
3 ERR Open Collector Output that goes low to

indicate that the output is about to go out
of regulation.

4GND Ground.

5FBFeedback Input. Connect to an external

resistor divider, which sets the output
voltage.

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.

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 ADP3331 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. A

WARNING!

ESD SENSITIVE DEVICE

–3–

ADP3331

)

)

)

)

)

)

)

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–Typical Performance Characteristics

3.010

V

= 3.0V

OUT

3.008

3.006

IL = 0mA

3.004

IL = 10mA

3.002

IL = 50mA

3.000

IL = 100mA

2.998

2.996

OUTPUT VOLTAGE (V)

2.994

IL = 200mA

2.992

2.990

3.25

4567 89101112

= 150mA

I

L

INPUT VOLTAGE (V

TPC 1. Line Regulation Output
Voltage vs. Supply Voltage

1.6

VIN = 7V

1.4

1.2

1.0

0.8

0.6

0.4

GROUND CURRENT (mA)

0.2

0

0

100 150

50 200

OUTPUT LOAD (mA

TPC 4. Ground Current vs. Load
Current

3.005

3.004

3.003

3.002

3.001

3.000

2.999

2.998

2.997

OUTPUT VOLTAGE (V)

2.996

2.995

2.994
25

50 75 100 125 150 175 200

0

OUTPUT LOAD (mA

V

= 3.0V

OUT

= 7V

V

IN

TPC 2. Output Voltage vs. Load
Current

0.4

0.3

0.2

0.1

OUTPUT VOLTAGE (%)

0.0

–0.1

–45 –25 135–5 15 35 75 95 11555

JUNCTION TEMPERATURE (ⴗC)

IL = 0mA

IL = 50mA

IL = 150mA

IL = 200mA

TPC 5. Output Voltage Variation % vs.
Junction Temperature

45

40

35

30

25

20

15

GROUND CURRENT (␮A)

10

5

0

0

IL = 100␮A

IL = 0␮A

246 810 12

INPUT VOLTAGE (V

V

= 3V

OUT

TPC 3. Ground Current vs. Supply
Voltage

3.0

2.8
IL = 200mA

2.6

2.4

2.2

2.0

1.8

1.6

1.4

1.2

1.0

0.8

GROUND CURRENT (mA)

0.6

0.4

0.2

0

–45 –25 115

IL = 150mA

IL = 50mA

IL = 0mA

–5 15 35 55 75 95

JUNCTION TEMPERATURE (ⴗC)

VIN = 7V

IL = 100mA

TPC 6. Ground Current vs. Junction
Temperature

135

250

200

150

100

50

INPUT/OUTPUT VOLTAGE (mV)

0

025 10050 75

OUTPUT LOAD (mA

125 150 175 200

TPC 7. Dropout Voltage vs.
Output Current

3.5

3.0

2.5

2.0

1.5

1.0

0.5

INPUT/OUTPUT VOLTAGE (V)

0

0 1.0 2.0 3.0 4.0 5.0

TIME (sec

V

OUT

SD = V
RL = 15⍀

TPC 8. Power-Up/Power-Down

–4–

= 3V

IN

CL = 0.47␮F

3

(V)V

2

OUT

V

1

0

10

(V)

5

IN

0

0 100 200 300 400 500

CL = 10␮F

TIME (␮s

VIN = 7V

= 3V

V

OUT

SD = V
RL = 15⍀

IN

TPC 9. Power-Up Response

REV. A