ANALOG DEVICES ADP3309 Service Manual

anyCAP® 100 mA

C

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FEATURES

±1.2% accuracy over line and load regulations @ 25°C
Ultralow dropout voltage: 120 mV typical @ 100 mA
Requires only C
anyCAP LDOs are stable with all types of capacitors

(including ML
Current and thermal limiting
Low noise
Low shutdown current: 1 μA

2.8 V to 12 V supply range

−20°C to +85°C ambient temperature range
Several fixed voltage options
Ultrasmall 5-lead SOT-23 package
Excellent line and load regulations

APPLICATIONS

Cellular telephones
Notebook, palmtop computers
Battery-powered systems
PCMCIA regulator
Bar code scanners
Camcorders, cameras

= 0.47 μF for stability

OUT

CC)

Low Dropout Linear Regulator

ADP3309

FUNCTIONAL BLOCK DIAGRAM

ADP3309

CC

g

m

BANDGAP

OUTIN

R1

R2

REF

ERR/N

Q1

THERMAL

PROTECTION

Q2

SD

DRIVER

GND

Figure 1.

00141-001

GENERAL DESCRIPTION

The ADP3309 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 LP2981, but offers
performance advantages. The ADP3309 stands out from
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 equivalent series resistance (ESR)
value, including ceramic types for space restricted applications.
The ADP3309 achieves ±1.2% accuracy at room temperature
and ±2.2% overall accuracy over temperature, line, and load
regulations. The dropout voltage of the ADP3309 is only
120 mV (typical) at 100 mA. This device also includes a current
limit and a shutdown feature. In shutdown mode, the ground
current is reduced to ~1 μA.

The ADP3309 operates with a wide input voltage range from

2.8 V t

o 12 V and delivers a load current in excess of 100 mA.
The ADP3309 anyCAP LDO offers a wide range of output
voltages.

4

V

IN

0.47µF

ERR/NC

C1

ADP3309-3.3

1

IN
+
–

3

OFF

SD

Figure 2. Typical Application Circuit

ON

OUT

GND

5

+

C2

0.47µF

–

2

V

= 3.3V

OUT

00141-002

Rev. C

Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her
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.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] www.analog.com
Fax: [phone] ©2006 Analog Devices, Inc. All rights reserved.

ADP3309

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TABLE OF CONTENTS

Features .............................................................................................. 1

Applications....................................................................................... 1

Functional Block Diagram .............................................................. 1

General Description......................................................................... 1

Revision History ............................................................................... 2

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

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

ESD Caution.................................................................................. 4

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

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

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

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

REVISION HISTORY

12/06—Rev. B to Rev. C

Change to Table 1 ............................................................................. 3

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

Changes to the Ordering Guide.................................................... 12

7/04—Rev. A to Rev. B.

Changes to the Ordering Guide...................................................... 3

Updated Outline Dimensions......................................................... 8

12/00—Rev. 0 to Rev. A

9/98—Revision 0: Initial Version

Capacitor Selection: anyCAP.................................................... 10

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

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

Printed Circuit Board Layout Consideration......................... 10

Shutdown Mode ......................................................................... 10

Error Flag Dropout Detector .................................................... 10

Application Circuits ....................................................................... 11

Crossover Switch ........................................................................ 11

Higher Output Current ............................................................. 11

Constant Dropout Post Regulator............................................ 11

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

Ordering Guide .......................................................................... 12

Rev. C | Page 2 of 12

ADP3309

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SPECIFICATIONS

@ TA = −20°C to +85°C, VIN = 7 V, CIN = 0.47 μF, C
options.

Table 1.

Parameter Symbol Conditions Min Typ Max Unit

Output Voltage Accuracy V
I
V
I
Line Regulation

Load Regulation

Ground Current I
I
Ground Current in Dropout I
Dropout Voltage V
I
I
I
Shutdown Threshold V
Off 0.3 V
Shutdown Pin Input Current I

5 < VSD ≤ 12 V @ VIN = 12 V 9 μA

Ground Current in Shutdown Mode IQ VSD = 0 V, VIN = 12 V, TA = 25°C 0.005 1 μA

V

Output Current in Shutdown Mode I
T
Error Pin Output Leakage IEL VEO = 5 V 13 μA
Error Pin Output Low Voltage V
Peak Load Current I
Output Noise @ 5 V Input V

1

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

= 0.47 μF, unless otherwise noted.1 The following specifications apply to all voltage

OUT

VIN = V

OUT

= 0.1 mA to 100 mA, TA = 25°C

L

= V

IN

= 0.1 mA to 100 mA

L

V

= V

ΔV

OUT

ΔV

IN

ΔV

OUT

ΔI

L

IL = 100 mA 0.8 2.0 mA

GND

VIN = 2.4 V, IL = 0.1 mA 0.9 1.7 mA

GND

V

DROP

On 2.0 V

THSD

0 < VSD ≤ 5 V 1 μA

SDIN

TA = 25°C @ VIN = 12 V 2 μA

OSD

EOL

VIN = V

LDPK

f = 10 Hz to 100 kHz 100 μV rms

NOISE

IN

= 25°C

T

A

I

= 0.1 mA to 100 mA, TA = 25°C 0.06 mV/mA

L

= 0.1 mA 0.19 0.3 mA

L

= 98% of V

OUT

= 100 mA 0.12 0.25 V

L

= 10 mA 0.025 0.07 V

L

= 1 mA 0.004 0.015 V

L

= 0 V, VIN = 12 V, TA = 85°C 0.01 3 μA

SD

= 85°C @ VIN = 12 V 4 μA

A

I

= 400 μA 0.12 0.3 V

SINK

+ 0.3 V to 12 V, −1.2 +1.2 %

OUTNOM

+ 0.3 V to 12 V, −2.2 +2.2 %

OUTNOM

+ 0.3 V to 12 V,

OUTNOM

OUTNOM

+ 1 V, TA = 25°C 150 mA

OUTNOM

0.02 mV/V

Rev. C | Page 3 of 12

ADP3309

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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 −55°C to +125°C
Operating Junction Temperature Range −55°C to +125°C

θ

JA

θ

JC

Storage Temperature Range −65°C to +150°C
Lead Temperature (Soldering 10 sec) 300°C

Vapor Phase (60 sec) 215°C

Infrared (15 sec) 220°C

190°C/W
92°C/W

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

ESD CAUTION

Rev. C | Page 4 of 12