Analog Devices ADP3308 Datasheet

anyCAP™ 50 mA

CC

OUT

GND

R1

R2

Q1

IN

SD

ADP3308

BANDGAP

REF

Q2

ERR/NC

DRIVER

THERMAL

PROTECTION

Gm

a

FEATURES
ⴞ1.2% Accuracy Over Line and Load Regulations

@ 25ⴗC
Ultralow Dropout Voltage: 80 mV Typical @ 50 mA
Requires Only C
anyCAP = Stable with All Types of Capacitors

(Including MLCC)
Current and Thermal Limiting
Low Noise
Low Shutdown Current: 1 ␮A

3.0 V to 12 V Supply Range
–20ⴗC to +85ⴗC Ambient Temperature Range
Several Fixed Voltage Options
Ultrasmall SOT-23-5 Package
Excellent Line and Load Regulations

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

= 0.47 ␮F for Stability

O

Low Dropout Linear Regulator

ADP3308

FUNCTIONAL BLOCK DIAGRAM

GENERAL DESCRIPTION

4

IN

0.47mF

ERR/NC

C1

ADP3308-3.3

1

IN

3

OFF

SD

ON

OUTV

GND

5

2

Figure 1. Typical Application Circuit

C2

0.47mF

V

OUT

= +3.3V

The ADP3308 is a member of the ADP330x family of precision
low dropout anyCAP voltage regulators. It is pin-for-pin and
functionally compatible with National’s LP2980, but offers
performance advantages. The ADP3308 stands out from the
conventional LDOs with a novel architecture and an enhanced

process. Its patented design requires only a 0.47 µF output

capacitor for stability. This device is stable with any type of
capacitor regardless of its ESR (Equivalent Serial Resistance)
value, including ceramic types for space restricted applications.

The ADP3308 achieves ±1.2% accuracy at room temperature
and ±2.2% overall accuracy over temperature, line and load

regulations. The dropout voltage of the ADP3308 is only
80 mV (typical) at 50 mA. This device also includes a current
limit and a shutdown feature. In shutdown mode, the ground

current is reduced to ~1 µA.

The ADP3308 operates with a wide input voltage range from

3.0 V to 12 V and delivers a load current in excess of 100 mA.
The ADP3308 anyCAP LDO offers a wide range of output
voltages. For 100 mA version, refer to the ADP3309 data sheet.

anyCAP is a trademark of Analog Devices, Inc.

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
which 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] World Wide Web Site: http://www.analog.com
Fax: [phone] © Analog Devices, Inc., 1998

ADP3308-xx–SPECIFICATIONS

(@TA = –20ⴗC to +85ⴗC, VIN = 7 V, CIN = 0.47 ␮F, C
otherwise noted.)1 The following specifications apply to all voltage options.

= 0.47 ␮F, unless

OUT

Parameter Symbol Conditions Min Typ Max Units

OUTPUT VOLTAGE ACCURACY V

OUT

VIN = V
I
T
V

OUTNOM

= 0.1 mA to 50 mA

L

= +25°C –1.2 +1.2 %

A

= V

IN

OUTNOM

+ 0.3 V to 12 V

+ 0.3 V to 12 V

IL = 0.1 mA to 50 mA –2.2 +2.2 %

∆V

∆V

∆V

∆I

GND

O

IN

O

L

LINE REGULATION V

LOAD REGULATION I

GROUND CURRENT I

= V

IN

T

T

OUTNOM

= +25°C 0.02 mV/V

A

= 0.1 mA to 50 mA

L

= +25°C 0.06 mV/mA

A

+ 0.3 V to 12 V

IL = 50 mA 0.54 1.4 mA
IL = 0.1 mA 0.19 0.3 mA

GROUND CURRENT IN DROPOUT I

GND

VIN = 2.4 V
IL = 0.1 mA 0.9 1.7 mA

V

DROPOUT VOLTAGE V

DROP

= 98% of V

OUT

OUTNOM

IL = 50 mA 0.08 0.17 V

= 10 mA 0.025 0.07 V

I

L

IL = 1 mA 0.004 0.030 V

SHUTDOWN THRESHOLD V

THSD

ON 2.0 0.75 V
OFF 0.75 0.3 V

SHUTDOWN PIN INPUT CURRENT I

GROUND CURRENT IN SHUTDOWN I

SDIN

Q

MODE T

OUTPUT CURRENT IN SHUTDOWN I

OSD

MODE T

ERROR PIN OUTPUT LEAKAGE I

EL

0 < V
5 < V

VSD = 0 V, VIN = 12 V

V
T

T

≤ 5 V 1 µA

SD

≤ 12 V @ VIN = 12 V 9 µA

SD

= +25°C 0.005 1 µA

A

= 0 V, VIN = 12 V

SD

= +85°C 0.01 3 µA

A

= +25°C @ VIN = 12 V 2 µA

A

= +85°C @ VIN = 12 V 4 µA

A

13 µA

ERROR PIN OUTPUT

“LOW” VOLTAGE V

PEAK LOAD CURRENT I

OUTPUT NOISE @ 5 V OUTPUT V

NOTES

1

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

Specifications subject to change without notice.

EOL

LDPK

NOISE

I

= 400 µA 0.12 0.3 V

SINK

VIN = V

OUTNOM

+ 1 V, T

= +25°C 150 mA

A

f = 10 Hz–100 kHz 100 µV

rms

–2–

REV. A

ADP3308

1
2
3

4

5

TOP VIEW

(Not to Scale)

IN

GND

OUT

ADP3308

SD ERR/NC

NC = NO CONNECT

WARNING!

ESD SENSITIVE DEVICE

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 . . . –55°C to +125°C
Operating Junction Temperature Range . . . –55°C to +125°C

␣ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165°C/W

θ

JA

θ

␣ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92°C/W

JC

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

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

be permanently damaged.

ORDERING GUIDE

Voltage Package Marking

Model Output Option* Code

ADP3308ART-2.7 2.7 V SOT-23 DAC
ADP3308ART-2.85 2.85 V SOT-23 DJC
ADP3308ART-2.9 2.9 V SOT-23 DKC
ADP3308ART-3 3.0 V SOT-23 DCC
ADP3308ART-3.3 3.3 V SOT-23 DEC
ADP3308ART-3.6 3.6 V SOT-23 DFC

*SOT = Surface Mount.
Contact the factory for the availability of other output voltage options.

PIN FUNCTION DESCRIPTIONS

Pin Name Function

1 IN Regulator Input.
2 GND Ground Pin.
3 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.

4 ERR/NC Open Collector. Output that goes low

to indicate the output is about to go out
of regulation or no connect.

5 OUT Output of the Regulator, fixed 2.7, 2.85,

2.9, 3.0, 3.3, or 3.6 volts output voltage.

Bypass to ground with a 0.47 µF or larger

capacitor.

PIN CONFIGURATION

Other Member of anyCAP Family

Model Output Current Package Option

1

2

ADP3309 100 mA SOT-23-5 Lead

NOTES

1

See individual data sheet for detailed ordering information.

2

SOT = Surface Mount.

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 ADP3308 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.

–3–REV. A