1

DATASHEET

3A Synchronous Buck Converter In 2x2 DFN Package

ISL80030, ISL80030A, ISL80031, ISL80031A

The ISL80030, ISL80030A, ISL80031 and ISL80031A are highly

efficient, monolithic, synchronous step-down DC/DC converters

that can deliver up to 3A of continuous output current from a 2.7V

to 5.5V input supply. They use peak current mode control

architecture to allow very low duty cycle operation. They operate

at either a 1MHz or 2MHz switching frequency, thereby providing

superior transient response and allowing for the use of small

inductors. They have excellent stability.

The ISL80030, ISL80030A, ISL80031 and ISL80031A integrate

addition, since the high-side MOSFET is a PMOS, the need for a

Boot capacitor is eliminated, thereby reducing external

component count. They can operate at 100% duty cycle.

The ISL80031, ISL80031A configured for PFM discontinuous

conduction operation, provides high efficiency by reducing

switching losses at light loads.

ISL80030, ISL80030A configured for PWM pulse width

modulation operation, provides a fast transient response,

which helps reduce the output noise and RF interference.

These devices are offered in a space saving 8 pin 2mmx2mm

DFN lead-free package with exposed pad for improved thermal

performance. The complete converter occupies less than

Features

• Up to 3A of output current

• Switching frequency is 1MHz or 2MHz (see Table 1 on page 3)

• 35µA quiescent current (ISL80031/A)

• Overcurrent and short-circuit protection

• Over-temperature/thermal protection

• Negative current protection

• Power-good and enable

• 100% duty cycle

• Internal soft-start and soft-stop

• Up to 95% peak efficiency

Applications

• General purpose POL

• Industrial, instrumentation and medical equipment

• Telecom and networking equipment

•Game console

FIGURE 1. TYPICAL APPLICATION CIRCUIT CONFIGURATION

VFB

------------ 1

–





=

(EQ. 1)

VIN

VIN

EN

PG

PHASE

FB

PGND

PGND

1

3

2

4

8

6

7

5

VOUT

L1

C1

22µF

C2

GND

VIN

GND

EN

PG

ISL80030/ISL80031

EPAD

9

+2.7V …+5.5V

+1.8V/3A

22µF

100k

 1%

0.6V

C3

22pF

R2

R1

200k

 1%

7

60

67

73

80

87

93

100

0

0.3

0.6

0.9

1.2

1.5

1.8

2.1

2.4

2.7

3.0

LOAD (A)

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774

Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.

All other trademarks mentioned are the property of their respective owners.

July 20, 2015

FN8766.0