Analog Devices ADP3605ARU-3, ADP3605AR-3, ADP3605AR Datasheet

120 mA Switched Capacitor

SD

OSC

CLOCK

GEN

FEEDBACK

CONTROL

LOOP

SD

SD

B

SD

SDN

C

P

+

C

P

–

PN

N

S1

S3

V

IN

V

OUT

V

SENSE

GND

S2

S4

ADP3605

a

Voltage Inverter with Regulated Output

FEATURES
Fully Regulated Output Voltage (–3 V and Adjustable)
High Output Current: 120 mA
Output Accuracy: ⴞ3%
250 kHz Switching Frequency
Low Shutdown Current: 2 ␮A Typical
Input Voltage Range from 3 V to 6 V
SO-8 and RU-14 Packages
–40ⴗC to +85ⴗC Ambient Temperature Range

APPLICATIONS
Voltage Inverters
Voltage Regulators
Computer Peripherals and Add-On Cards
Portable Instruments
Battery Powered Devices
Pagers and Radio Control Receivers
Disk Drives
Mobile Phones

ADP3605

FUNCTIONAL BLOCK DIAGRAM

GENERAL DESCRIPTION

+

SENSE

*C

4.7mF

–3.0VV

O

The ADP3605 is a 120 mA regulated output switched capacitor
voltage inverter. It provides a regulated output voltage with
minimum voltage loss and requires a minimum number of ex­ternal components. In addition, the ADP3605 does not require
the use of an inductor.

Pin-for-pin and functionally compatible with the ADP3604, the
internal oscillator of the ADP3605 runs at 500 kHz nominal
frequency which produces an output switching frequency of
250 kHz. This allows for the use of smaller charge pump and
filter capacitors.

The ADP3605 provides an accuracy of ±3% with a typical shut­down current of 2 µA. It can also operate from a single positive

V

V

+

IN

OUT

CP+

ADP3605-3

–

C

P

GND

IN

+

*C

IN

4.7mF

OFF

*FOR BEST PERFORMANCE, 10mF IS RECOMMENDED
C

P

C

IN

*C

P

4.7mF

SD

ON

0

: SPRAGUE, 293D475X0010B2W
, CO: TOKIN, 1E475ZY5UC205F

Figure 1. Typical Application Circuit

V

input voltage as low as 3 V. The ADP3605 is offered with the
regulation fixed at –3 V or adjustable via external resistors over
a –3 V to –6 V range.

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., 1999

1, 2, 3

ADP3605–SPECIFICATIONS

Parameter Symbol Conditions Min Typ Max Units

OPERATING SUPPLY RANGE V

SUPPLY CURRENT I

Shutdown Mode V

OUTPUT VOLTAGE

4

LOAD REGULATION ∆V

OUTPUT RESISTANCE

Open Loop R

OUTPUT RIPPLE VOLTAGE V

SWITCHING FREQUENCY F

SHUTDOWN

Logic Input High V
Input Current I
Logic Input Low V
Input Current I

NOTES

1

Capacitors C

2

See Figure 1 Conditions.

3

All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods.

4

For the adjustable device, a 1% resistor should be used to maintain output voltage tolerance. For both device types, tolerances can be improved by >1% using larger
value and lower ESR capacitors for CO and CP.

Specifications subject to change without notice.

IN, CO

and C

in the test circuit are 4.7 µF with 0.1 Ω ESR.

P

S

S

V

O

O

RIPPLE

S

IH

IH

IL

IL

O/IO

(VIN = 5.0 V @ TA = +25ⴗC, CP = CO = 4.7 ␮F unless otherwise noted)

356V

–40°C < TA < +85°C36mA

SD

= V

IN

215µA

–40°C < TA < +85°C

IO = 60 mA –3.09 –3.0 –2.91 V

= 10 mA–120 mA, –3.15 –3 –2.85 V

I

O

–40°C ≤ T

≤ +85°C

A

4.75 V ≤ VS ≤ 6.0 V

IO = 10 mA–60 mA 0.3 mV/mA
IO = 10 mA–120 mA 0.25 mV/mA

9 Ω

C

= C

= 4.7 µF,

IN

I
I

O

= 60 mA 38 mV

LOAD

= 120 mA 75 mV

LOAD

VIN = 5 V 212 250 288 kHz

–40°C < TA < +85°C

2.4 V

1 µA

0.4 V

1 µA

ABSOLUTE MAXIMUM RATINGS

(T

= +25°C unless otherwise noted)

A

Input Voltage (V+ to GND, GND to OUT) . . . . . . . . +7.5 V

Input Voltage (V+ to OUT) . . . . . . . . . . . . . . . . . . . . . +11 V

Output Short Circuit Protection . . . . . . . . . . . . . . . . . . . 1 sec

Power Dissipation, SO-8 . . . . . . . . . . . . . . . . . . . . . . 660 mW

2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C/W

θ

JA

Power Dissipation, RU-14 . . . . . . . . . . . . . . . . . . . . . 600 mW

2

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

θ

JA

1

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

NOTES

1

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

be permanently damaged.

2

θ

is specified for worst case conditions with device soldered on a circuit board.

JA

Operating Temperature Range . . . . . . . . . . . –40°C to +85°C

ORDERING GUIDE

Model Output Voltage Package Description Package Options*

ADP3605AR-3 –3 V Small Outline SO-8
ADP3605AR ADJ Small Outline SO-8
ADP3605ARU-3 –3 V Thin Shrink Small Outline Package (TSSOP) RU-14

*Contact the factory for the availability of other output voltage options.

–2–

REV. A

ADP3605

WARNING!

ESD SENSITIVE DEVICE

ADP3605

NC
NC
NC
V

IN

V

OUT

NC
V

SENSE

NC
NC
NC

SD

CP–

GND

C

P

+

NC = NO CONNECT

Table I. Other Members of ADP36xx Family

1

Output Package

Model Current Option2Comments

ADP3603AR 50 mA SO-8 Nom.–3 ± 3% Inverter
ADP3604AR 120 mA SO-8 Nom.–3 ± 3% Inverter

ADP3610ARU 320 mA TSSOP-16 Nom. 3.3 VIN Doubler

NOTES

1

See individual data sheets for detailed ordering information.

2

SO = Small Outline; TSSOP = Thin Shrink Small Outline Package.

Table II. Alternative Capacitor Technologies

High

Type Life Freq Temp Size Cost

Aluminum
Electrolytic
Capacitor Fair Fair Fair Small Low

Multilayer
Ceramic
Capacitor Long Good Poor Fair1High

Solid
Tantalum Above
Capacitor Avg Avg Avg Avg Avg

OS-CON Above
Capacitor Avg Good Good Good Avg

NOTE

1

Refer to capacitor manufacturer's data sheet for operation below 0°C.

Table III. Recommended Capacitor Manufacturers

Manufacturer Capacitor Capacitor Type

Sprague 672D, 673D,

674D, 678D Aluminum Electrolytic

Sprague 675D, 173D,

199D Tantalum
Nichicon PF and PL Aluminum Electrolytic
Mallory TDC and TDL Tantalum
TOKIN MLCC Multilayer Ceramic
MuRata GRM Multilayer Ceramic

PIN FUNCTION DESCRIPTIONS

Pin Pin
SO-8 TSSOP Name Function

14 C

+ Positive Terminal for the Pump

P

Capacitor.
2 5 GND Device Ground.
36 C

– Negative Terminal for the Pump

P

Capacitor.
4 7 SD Logic Level Shutdown Pin. Apply a

logic high or connect to V

to shut-

IN

down the device. In shutdown mode,

the charge pump is turned off and

quiescent current is reduced to 2 µA

(typical). Apply a logic low or con-

nect to ground for normal operation.
58 V

SENSE

Output Voltage Sense Line. This is

used to improve load regulation by

eliminating IR drop on the high

current carrying output traces. For

normal operation, connect V

V

. See Application section for

OUT

SENSE

to

more detail.
6 1, 2, 3,

9, 12,
13, 14 NC No Connection.

710 V

OUT

Regulated Negative Output Voltage.

Connect a low ESR, 4.7 µF or larger

capacitor between this pin and de-

vice GND.
811 V

IN

Positive Supply Input Voltage. Con-

nect a low ESR bypass capacitor

between this pin and device ground

to minimize supply transients.

PIN CONFIGURATIONS

RU-14 SO-8

1

+

C

P

2

ADP3605

GND

TOP VIEW

3

C

–

P

(Not to Scale)

4

SD

NC = NO CONNECT

8

V

IN

7

V

OUT

6

NC

5

V

SENSE

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 ADP3605 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges larger than 600 V HBM.
Therefore, proper ESD precautions are recommended to avoid performance degradation or loss
of functionality.

–3–REV. A