Analog Devices ADP1109 Datasheet

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DRIVER

SW

V

IN

GND

COMPARATOR

A1

R1

SENSE

R2
250kV

SHUTDOWN

+

ADP1109-3.3: R1 = 152kV
ADP1109-5: R1 = 83kV
ADP1109-12: R1 = 29kV

Q1

120kHz

OSCILLATOR

1.25V

REFERENCE

DRIVER

SW

V

IN

GND

COMPARATOR

A1

FB

SHUTDOWN

+

ADP1109

Q1

120kHz

OSCILLATOR

1.25V

REFERENCE

SW

GND

ADP1109-12

+

D1

C1
22mF
16V

SENSE

L1

33

mH

V

IN

5V

V

IN

SHUTDOWN

SHUTDOWN/PROGRAM

V

OUT

12V
60mA

Fixed 3.3 V , 5 V, 12 V and Adjustable

a

FEATURES
Operates at Supply Voltages 2 V to 12 V
Fixed 3.3 V, 5 V, 12 V and Adjustable Output
Minimum External Components Required
Ground Current: 320 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

ADP1109

FUNCTIONAL BLOCK DIAGRAMS

Fixed Output

GENERAL DESCRIPTION

The ADP1109 is a versatile step-up switching regulator. The
device requires only minimal external components to operate as
a complete switching regulator.

The ADP1109-5 can deliver 100 mA at 5 V from a 3 V input
and the ADP1109-12 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.

Adjustable Output

TYPICAL APPLICATION

Flash Memory VPP Generator

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., 1998

ADP1109–SPECIFICA TIONS

SW

GND

ADP1109-12

+

1N5818

22mF
16V

SENSE

L1

15mH

L1 = CTX15-1

V

IN

= 2V

V

IN

300mA

at 3V INPUT

50mA

at 2V INPUT

+5V

SHUTDOWN

SHUTDOWN

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

Parameter Conditions Symbol Min Typ Max Units

QUIESCENT CURRENT Switch Off I
INPUT VOLTAGE V

Q

IN

29V

450 590 µA

COMPARATOR TRIP POINT

VOLTAGE 1.20 1.25 1.30 V
COMPARATOR HYSTERESIS ADP1109 8 14 mV
OUTPUT VOLTAGE

ADP1109-3.3 2 V ≤ V

ADP1109-5 3 V ≤ V

≤ 3 V V

IN

≤ 5 V 4.75 5.00 5.25 V

IN

OUT

3.13 3.30 3.46 V

ADP1109-12 3 V ≤ VIN ≤ 12 V 11.45 12.00 12.55 V
OUTPUT VOLTAGE RIPPLE ADP1109-3.3 16 40 mV

ADP1109-5 20 50 mV
ADP1109-12 40 110 mV

OSCILLATOR FREQUENCY T

= +25°Cf

A

OSC

100 120 140 kHz

90 155 kHz
DUTY CYCLE Full Load DC 40 50 70 %
SWITCH-ON TIME T

= +25°Ct

A

ON

3.1 4.2 5.9 µs

3.0 6.5 µs

SWITCH SATURATION VOLTAGE I

= 500 mA V

SW

CESAT

ADP1109-3.3 VIN = 3 V 0.4 0.8 V
ADP1109-5 V

= 3 V 0.4 0.8 V

IN

ADP1109-12 VIN = 5 V 0.4 0.8 V
SWITCH LEAKAGE CURRENT VSW = 12 V, TA = +25°C110µA
SHUTDOWN PIN HIGH V
SHUTDOWN PIN LOW V
SHUTDOWN PIN INPUT CURRENT V
SHUTDOWN PIN INPUT CURRENT V

SHUTDOWN

SHUTDOWN

= 2 V I
= 0.8 V I

IH

IL

IH

IL

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

Specifications subject to change without notice.

IN

= 2V

L1 = CTX15-1

L1

15mH

V

IN

ADP1109-12

SW

SENSE

GND

1N5818

+12V

40mA

at 3V INPUT

10mA

at 2V INPUT

10mF

+

20V

L1 = CTX15-1

L1

= 2V

V

IN

15mH

V

ADP1109-5

1N5818

SW

SENSE

IN

GND

+5V

300mA

at 3V INPUT

50mA

at 2V INPUT

22mF

+

16V

V

2.0 V

0.8 V
10 µA
20 µA

Figure 1. 2 V to 5 V Converter

Figure 2. 2 V to 12 V Converter

–2– REV. 0

Figure 3. 2 V to 5 V Converter
With Shutdown

ADP1109

WARNING!

ESD SENSITIVE DEVICE

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.

ORDERING GUIDE

Output Package Package

Model Voltage Description Options

ADP1109AN ADJ Plastic DIP N-8
ADP1109AR ADJ Small Outline IC SO-8
ADP1109AN-3.3 3.3 V Plastic DIP N-8
ADP1109AR-3.3 3.3 V Small Outline IC SO-8
ADP1109AN-5 5 V Plastic DIP N-8
ADP1109AR-5 5 V Small Outline IC SO-8
ADP1109AN-12 12 V Plastic DIP N-8
ADP1109AR-12 12 V Small Outline IC SO-8

PIN FUNCTION DESCRIPTIONS

PIN CONFIGURATIONS

8-Lead Plastic DIP

(N-8)

1

V

IN

ADP1109A

2

NC

TOP VIEW

3

SW

(Not to Scale)

4

NC = NO CONNECT

*FIXED VERSIONS

8

FB(SENSE)*

7

SHUTDOWN

6

NC

5

NCGND

8-Lead SOIC

(SO-8)

1

V

IN

ADP1109A

2

NC

TOP VIEW

3

SW

(Not to Scale)

GND

4

NC = NO CONNECT

*FIXED VERSIONS

8

FB(SENSE)*

7

SHUTDOWN

6

NC

5

NC

Pin Mnemonic Function

1V

IN

Input Supply Voltage.
2, 5, 6 NC No Connection.
3 SW Collector Node of Power Transistor.
4 GND Ground.
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 ADP1109-3.3,

ADP1109-5 and ADP1109-12, this

pin is connected through the internal

resistor that sets the output voltage.

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 ADP1109 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