Analog Devices ADP1109AAR-5, ADP1109AAR-3.3, ADP1109AAR-12, ADP1109AAR, ADP1109AAN-5 Datasheet

Micropower Low Cost

120kHz

OSCILLATOR

ADP1109A-3.3: R1 = 152kV
ADP1109A-5: R1 = 83kV
ADP1109A-12: R1 = 29kV

V

IN

SENSE

SW

PGND

SHUTDOWN

GND

1.25V

REFERENCE

R2
250kV

R1

DRIVER

COMPARATOR

Q1

A1

120kHz

OSCILLATOR

ADP1109A

V

IN

FB

SW

PGND

SHUTDOWN

GND

1.25V

REFERENCE

DRIVER

COMPARATOR

Q1

A1

Fixed 3.3 V , 5 V, 12 V and Adjustable

a

FEATURES
Operates at Supply Voltages 2 V to 9 V
Fixed 3.3 V, 5 V, 12 V and Adjustable Output
Minimum External Components Required
Ground Current: 460 mA
Oscillator Frequency: 120 kHz
Logic Shutdown
8-Lead DIP and SO-8 Packages

APPLICATIONS
Cellular Telephones
Single-Cell to 5 V Converters
Laptop and Palmtop Computers
Pagers
Cameras
Battery Backup Supplies
Portable Instruments
Laser Diode Drivers
Hand-Held Inventory Computers

DC-to-DC Converter

ADP1109A

FUNCTIONAL BLOCK DIAGRAM

GENERAL DESCRIPTION

The ADP1109A is a versatile step-up switching regulator. The
device requires only minimal external components to operate as
a complete switching regulator.

The ADP1109A-5 can deliver 100 mA at 5 V from a 3 V input
and the ADP1109A-12 can deliver 60 mA at 12 V from a 5 V
input. The device also features a logic controlled shutdown
capability that, when a logic low is applied, will shut down the
oscillator. The 120 kHz operating frequency allows for the use
of small surface mount components.

The gated oscillator capability eliminates the need for frequency
compensation.

TYPICAL APPLICATION

L1

33mH

3

V

IN

5V

7

SHUTDOWN/PROGRAM

SW

V

IN

ADP1109A-12

SHUTDOWN

PGND GND

4

Flash Memory VPP Generator

D1

SENSE

5

81

V

OUT

12V
60mA

C1

+

22mF
16V

REV. 0

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., 1997

ADP1109A–SPECIFICA TIONS

(08C ≤ TA ≤ 708C, VIN = 3 V unless otherwise noted)

Parameter Conditions V

QUIESCENT CURRENT Switch Off I
INPUT VOLTAGE V

S

Q

IN

Min Typ Max Units

460 580 µA

29V

COMPARATOR TRIP POINT

VOLTAGE 1.20 1.25 1.30 V
COMPARATOR HYSTERESIS ADP1109A 8 12.5 mV
OUTPUT VOLTAGE

ADP1109A-3.3 2 V ≤ V

ADP1109A-5 2 V ≤ V

ADP1109A-12 2 V ≤ V

≤ 3 V V

IN

≤ 5 V 4.75 5.00 5.25 V

IN

≤ 9 V 11.45 12.00 12.55 V

IN

OUT

3.13 3.30 3.47 V

OUTPUT VOLTAGE RIPPLE ADP1109A-3.3 15 35 mV

ADP1109A-5 25 50 mV
ADP1109A-12 60 120 mV

OSCILLATOR FREQUENCY f

OSC

95 120 155 kHz
DUTY CYCLE Full Load DC 57 67 77 %
SWITCH-ON TIME t
SWITCH SATURATION VOLTAGE I

= 500 mA V

SW

ON

CESAT

3.8 5.6 7.4 µs

ADP1109A-3.3 VIN = 3 V 0.4 0.8 V
ADP1109A-5 V

= 3 V 0.4 0.8 V

IN

ADP1109A-12 VIN = 3 V 0.4 0.8 V
SWITCH LEAKAGE CURRENT VSW = 9 V, TA = +25°C110µA
SHUTDOWN PIN HIGH V
SHUTDOWN PIN LOW V
SHUTDOWN PIN INPUT CURRENT V
SHUTDOWN PIN INPUT CURRENT V

NOTES
All limits at temperature extremes are guaranteed via correlation using standard quality control methods.

Specifications subject to change without notice.

SHUTDOWN

SHUTDOWN

= 4 V I
= 0 V I

IH

IL

IH

IL

2.0 V

0.8 V
10 µA
20 µA

ABSOLUTE MAXIMUM RATINGS*

Supply Voltage, V

. . . . . . . . . . . . . . . . . . . . –0.4 V to 20 V

OUT

SW Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . –0.4 V to 50 V

Shutdown Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 6.0 V

Switch Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 A

Maximum Power Dissipation . . . . . . . . . . . . . . . . . . 300 mW

Operating Temperature Range . . . . . . . . . . . . 0°C to +70°C

Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C

Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . +300°C

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

be permanently damaged.

–2–

REV. 0

ADP1109A

WARNING!

ESD SENSITIVE DEVICE

PIN FUNCTION DESCRIPTIONS

Pin Mnemonic Function

1V

IN

Input Supply Voltage.
2 NC No Connection.
3 SW Collector Node of Power Transistor.
4 PGND Power Ground.
5 GND Ground.
6 NC No Connection.
7 SHUTDOWN When logic low is applied to this pin,

oscillator is shut down.
8 FB(SENSE) On the ADP1109A (Adjustable), this

pin goes directly to the comparator input.

On the ADP1109A-3.3, ADP1109A-5

and ADP1109A-12, this pin is connected

through the internal resistor that sets

the output voltage.

ORDERING GUIDE

Output Package Package

Model Voltage Description Options

ADP1109AAN ADJ Plastic DIP N-8
ADP1109AAR ADJ Small Outline IC SO-8
ADP1109AAN-3.3 3.3 V Plastic DIP N-8
ADP1109AAR-3.3 3.3 V Small Outline IC SO-8
ADP1109AAN-5 5 V Plastic DIP N-8
ADP1109AAR-5 5 V Small Outline IC SO-8
ADP1109AAN-12 12 V Plastic DIP N-8
ADP1109AAR-12 12 V Small Outline IC SO-8

PIN CONFIGURATIONS

8-Lead Plastic DIP

(N-8)

1

V

IN

2

NC

3

SW

4

PGND

*FIXED VERSIONS
NC = NO CONNECT

ADP1109A

TOP VIEW

(Not to Scale)

8

FB(SENSE)*

7

SHUTDOWN

6

NC

5

GND

8-Lead SOIC

(SO-8)

1

V

IN

2

NC

3

SW

4

PGND

*FIXED VERSIONS

NC = NO CONNECT

ADP1109A

TOP VIEW

(Not to Scale)

8

FB(SENSE)*

7

SHUTDOWN

6

NC

5

GND

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 ADP1109A 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. 0