ADP1111

–3–

REV. 0

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 ADP1111 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.

ORDERING GUIDE

Model

Output Voltage

Package*

ADP1111AN

ADJ

N-8

ADP1111AR

ADJ

SO-8

ADP1111AN-3.3

3.3 V

N-8

ADP1111AR-3.3

3.3 V

SO-8

ADP1111AN-5

5 V

N-8

ADP1111AR-5

5 V

SO-8

ADP1111AN-12

12 V

N-8

ADP1111AR-12

12 V

SO-8

*N = Plastic DIP, SO = Small Outline Package.

ABSOLUTE MAXIMUM RATINGS

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 V

SW1 Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 V

Feedback Pin Voltage (ADP1111) . . . . . . . . . . . . . . . . . 5.5 V

Switch Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 A

Maximum Power Dissipation . . . . . . . . . . . . . . . . . . 500 mW

Operating Temperature Range

ADP1111A . . . . . . . . . . . . . . . . . . . . . . . . . . . 0

°C to +70°C

Storage Temperature Range . . . . . . . . . . . . . –65

°C to 150°C

Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . . 300

°C

PIN DESCRIPTIONS

Mnemonic

Function

For normal conditions this pin is connected to

Limiting the switch current to 400 mA is achieved

by connecting a 220

Ω resistor.

Input Voltage.

SW1

Collector Node of Power Transistor. For step-

configuration, connect to an inductor/diode.

SW2

Emitter Node of Power Transistor. For step-

down configuration, connect to inductor/diode.

For step-up configuration, connect to ground.

Do not allow this pin to go more than a diode

drop below ground.

GND

Ground.

AO

Auxiliary Gain (GB) Output. The open collector

can sink 300

µA. It can be left open if unused.

SET

Gain Amplifier Input. The amplifier’s positive

input is connected to SET pin and its negative

input is connected to the 1.25 V reference. It can

be left open if unused.

FB/SENSE

On the ADP1111 (adjustable) version this pin

is connected to the comparator input. On the

ADP1111-3.3, ADP1111-5 and ADP1111-12,

the pin goes directly to the internal application

resistor that sets output voltage.

WARNING!

ESD SENSITIVE DEVICE

TYPICAL APPLICATION

10µF

(OPTIONAL)

SW1

SW2

GND

ADP1111AR-5

SUMIDA

CD54-220K

22µH

5V

100mA

33µF

SENSE

3V

INPUT

MBRS120T3

Figure 1. 3 V to 5 V Step-Up Converter

PIN CONFIGURATIONS

8-Lead Plastic DIP

8-Lead SOIC

(N-8)

(SO-8)

A0

SW1

GND

SW2

*FIXED VERSIONS

FB (SENSE)*

SET

1

2

3

4

8

7

6

5

ADP1111

TOP VIEW

(Not to Scale)

A0

SW1

GND

SW2

*FIXED VERSIONS

FB (SENSE)*

SET

1

2

3

4

8

7

6

5

ADP1111

TOP VIEW

(Not to Scale)