ADP3031

REV. PrB

–3–

PRELIMINARY TECHNICAL DATA

ABSOLUTE MAXIMUM RATINGS*

Input Voltage .............................................. –0.3 V to +6 V

SW Voltage ................................................................. 14 V

COMP Voltage ........................................ –0.3 V to +2.5 V

FB Voltage ............................................... –0.3 V to +1.3 V

SD Voltage .................................................. –0.3 V to +6 V

RT Voltage ............................................... –0.3 V to +1.2 V

PGND TO GND ................................................ ±200 mV

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

Operating Junction Temperature Range ..... –40°C to 125°C

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

θ

JA

Two Layer ..................................................... 206°C/W

θ

JA

Four Layer ..................................................... 142°C/W

Lead Temperature Range (Soldering, 60 sec.) .......... 300°C

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

to be permanently damaged. Unless otherwise specified, all voltages are

referenced to GND

ORDERING GUIDE

Voltage Package Branding

Model

Output

Option

Information

ADP3031ARM

ADJ

MSOP-8 P8A

PIN FUNCTION DESCRIPTIONS

Pin

Mnemonic

Function

1

COMP

Compensation Input.

2

FB

Feedback voltage sense input.

3

SD

Shutdown Input.

4

PGND

Power Ground. Ground return for

power transistor.

5

SW

Switching Output.

6

IN

Main Power Supply Input.

7

RT

Frequency Setting Input. A resistor

between this pin and GND sets the

switching frequency of the device.

8

GND

Analog Ground. The control

circuitry is referenced to this ground.

PIN CONFIGURATION

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 device features proprietary ESD protection circuitry, permanent damage may occur on devices

subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recom-

mended to avoid performance degradation or loss of functionality.

Figure 1. Typical Application

1

2

3

4

8

7

6

5

TOP VIEW

(Not to Scale)

MSOP8

COMP

FB

SW

SD

PGND

IN

RT

GND

REF

RAMP

GEN

Q

S

R

F/F

DRIVER

CURRENT

SENSE

AMPLIFIER

COMP

SW

FB

IN

COMPARATOR

ERROR

AMP

PGND

BIAS

1

gm

2

5

SD

VOUT

ADP3031

7

IN

VOUT

OSC

RT

GND

4

6

8

R1

R2

RT

CC

3

CIN

COUT

D1

L1

RC