Analog Devices ADP3342 d Datasheet

Ultralow, IQ, anyCAP

®

FEATURES

Accuracy over line and load: ±4.0% @ 25°C,

±5% over temperature
Ultralow dropout voltage: 190 mV (typ) @ 300 mA
Requires only CO = 1.0 µF for stability
anyCAP architecture stable with any type of capacitor

(including MLCC)
Current and thermal limiting
Low shutdown current: < 2 µA

1.7 V ≤ V

2.8 V ≤ V
V

OUT

0°C to +100°C ambient temperature range
Ultrasmall thermally enhanced 8-lead MSOP package

APPLICATIONS

Notebook PCs
Desktop PCs

GENERAL DESCRIPTION

The ADP3342 is a unique member of the ADP33xx family
of precision low dropout anyCAP voltage regulators. The
ADP3342 operates with an input voltage range of 1.7 V to 6 V
and delivers a continuous load current up to 300 mA. In order
to support the ability to regulate from such a low input voltage,
the power rail to the IC, VCC, has been split off from the main
power rail, IN, from which the output is powered.

The ADP3342 stands out from the conventional LDOs because
it has the lowest thermal resistance of any MSOP-8 package and
an enhanced process that enables it to offer performance
advantages beyond its competition. Its patented design requires
only a 1.0 µF output capacitor for stability. This device is
insensitive to output capacitor equivalent series resistance (ESR)
and is stable with any good quality capacitor, including ceramic
(MLCC) types for space-restricted applications. The dropout
voltage of the ADP3342 is only 190 mV (typical) at 300 mA.
This device also includes a safety current limit, thermal
overload protection, and a shutdown control pin.

≤ 6 V

IN

≤ 6 V

CC

= 1.2 V ±5%

PWRGD

Low Dropout Regulator

FUNCTIONAL BLOCK DIAGRAM

Q1

DRIVER

GND

Figure 1.

3.3V

3

VCC

ADP3342

INSDOUT

PWRGD

GND

4

VCC

SD

IN

THERMAL

PROTECTION

ADP3342

V

IN

1.8V

+

1µF1µF

ON

OFF

Figure 2. Typical Application Circuit

CC

27

56

ADP3342

g

m

BAND GAP +

REF –

V

OUT

1.2V

+

02712-002

OUT

02712-001

Rev. D

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.
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]
Fax: [phone] © 2005 Analog Devices, Inc. All rights reserved.

www.analog.com

ADP3342

TABLE OF CONTENTS

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

Capacitor Selection .................................................................... 12

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

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

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

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

Theory of Operation ...................................................................... 11

Application Information................................................................ 12

PC Application—VCCVID ....................................................... 12

REVISION HISTORY

2/05— Rev. C to Rev. D

Format Updated..................................................................Universal

Change to Features........................................................................... 1

Change to Specifications.................................................................. 3

Changes to Table 3............................................................................ 5

11/04—Rev. B to Rev. C

Changes to ORDERING GUIDE ................................................... 3

3/03—Rev. A to Rev. B

Changes to FEATURES .....................................................................1

Changes to Figure 1............................................................................1

Changes to SPECIFICATIONS.........................................................2

Changes to ABSOLUTE MAXIMUM RATINGS..........................3

Changes to PIN FUNCTION DESCRIPTIONS ............................3

Changes to PC Application—VCCVID section .............................7

Deleted Paddle under Lead Package section...................................7

Changes to Calculating Junction Temperature section.................8

Updated OUTLINE DIMENSIONS ................................................8

Input Bypass Capacitor.............................................................. 12

Power Good Monitoring Function .......................................... 12

Shutdown Mode ......................................................................... 12

Thermal Overload Protection .................................................. 12

Calculating Junction Temperature........................................... 12

Outline Dimensions ....................................................................... 13

Ordering Guide .......................................................................... 13

10/02—Rev. 0 to Rev. A

Changes to PIN CONFIGURATION .............................................. 3

Changes to PIN FUNCTION DESCRIPTION.............................. 3

Updated OUTLINE DIMENSIONS ................................................8

Rev. D | Page 2 of 16

ADP3342

SPECIFICATIONS

VCC = 3.0 V, VIN = 1.8 V, CIN = C

= 1 µF, TA = 0°C to 100°C, unless otherwise noted.

OUT

Table 1.

Parameter Symbol Conditions Min Typ Max Unit

OUTPUT

Voltage Accuracy V

OUT

I
T
V
I
T

VCC = 2.8 V to 6 V, VIN = 1.7 V to 6 V −4.0 +4.0 %

= 0.1 mA to 300 mA

L

= 25°C

A

= 2.8 V to 6 V, VIN = 1.7 V to 6 V −5.0 +5.0 %

CC

= 0.1 mA to 300 mA

L

= −40°C to +100°C

A

Line Regulation VCC = 2.8 V to 6 V, VIN = 1.7 V to 6 V 0.04 mV/V
T

= 25°C

A

Load Regulation IL = 0.1 mA to 300 mA 0.12 mV/mA
T
Dropout Voltage V

DROP

I
I
I
Current Limiting I
Output Noise V

LIM

NOISE

I

= 25°C

A

V

= 98% of V

OUT

= 300 mA 190 450 mV

L

= 200 mA 125 mV

L

= 100 mA 70 mV

L

OUTNOM

VCC = 3 V, VIN = 1.8 V 450 mA
f = 10 Hz to 100 kHz, CL = 1 µF 60 µV rms

= 300 mA

L

OPERATING CURRENTS

Ground Current in Regulation I

GND

I
I
I
I
VCC Current in Regulation I
Ground Current in Shutdown I

VCC

GNDSD

IL = 300 mA, TA = −40°C to +100°C 3.0 8.5 mA

= 300 mA, TA = 0°C to 100°C 3.0 6.0 mA

L

= 300 mA, TA = 25°C 3.0 4.0 mA

L

= 200 mA 2.0 mA

L

= 0.1 mA 100 175 µA

L

IL = 300 mA 100 170 µA
SD = 0 V, VCC = 6 V, VIN = 1.8 V 0.01 2 µA

SHUTDOWN

Threshold Voltage V

THSD

On VCC − 0.9 V
Off 0.6 V
SD

Input Current
Output Current in Shutdown I
T

I

SD 0 ≤

OSD

TA = 25°C, VCC = 6 V, VIN = 6 V 0.01 1 µA

SD

≤ 6 V

= 100°C, VCC = 6 V, VIN = 6 V 0.01 2 µA

A

PWRGD

Output Current I
Output Low Voltage V
Output High Voltage V

PWRGDL

PWRGDL

PWRGDH

On-Time Delay TD1
TD2
Off-Time Delay TD3

4

5

6

V

= 1.2 V, VCC = 3.0 V 0.85 1.5 mA

PWRGD

3

I

= 300 µA 0.4 V

PWRGD

3

I

= 300 µA VCC − 0.4 V

PWRGD

IL = 3 mA to 300 mA, C
IL = 3 mA to 300 mA, C
IL = 3 mA to 300 mA, C

= 1 µF to 10 µF 5 300 µs

OUT

= 1 µF to 10 µF 50 300 µs

OUT

= 1 µF to 10 µF 0.05 1 µs

OUT

THERMAL PROTECTION

Shutdown Temperature TH

1

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

2

Ambient temperature of 100°C corresponds to a junction temperature of 125°C under typical full load test conditions.

3

V

, V

PWRGDL

4

TD1: Delay time from V

5

TD2: Delay time from SD high to PWRGD high. Guaranteed by design.

6

TD3: Delay time between SD low and PWRGD low. Guaranteed by design.

: Power good output voltages. Guaranteed by design and characterization.

PWRGDH

crossing 1 V to PWRGD high. Guaranteed by design.

OUT

PROT

IL = 100 mA 165 °C

1, 2

1.4 7 µA

Rev. D | Page 3 of 16

ADP3342

ABSOLUTE MAXIMUM RATINGS

Table 2.

Parameter Rating

Input Supply Voltage −0.3 V to +13 V
Shutdown Input Voltage −0.3 V to +13 V
Power Dissipation Internally Limited
Operating Ambient Temperature Range −40°C to +100°C
Operating Junction Temperature Range −40°C to +150°C
θJA (2-Layer Board) 205°C/W
θJA (4-Layer Board) 142°C/W
θ

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

56°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 listed in the operational sections
of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability. Absolute maximum ratings apply individually
only, not in combination. Unless otherwise specified, all other
voltages are referenced to GND.

ESD 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 this product 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. D | Page 4 of 16

ADP3342

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

NC

1

ADP3342

OUT

2

VCC

GND

TOP VIEW

3

(Not to Scale)

4

NC = NO CONNECT

Figure 3. Pin Configuration

Table 3. Pin Function Descriptions

Pin No. Mnemonic Function

1, 8 NC No Connection.
2 OUT Output of the Regulator. Bypass to ground with a 1.0 µF or larger capacitor.
3 VCC Supply Voltage.
4 GND Ground Pin.
5 PWRGD Power Good. Used to indicate that output is in regulation.
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 VCC pin.

7 IN Regulator Input.

8
7
6
5

NC
IN
SD
PWRGD

02712-003

Rev. D | Page 5 of 16