The ISL8002B is a highly efficient, monolithic, synchronous

step-down DC/DC converter that can deliver up to 2A of

continuous output current from a 2.7V to 5.5V input supply. It

uses peak current mode control architecture to allow very low

duty cycle operation. ISL8002B operates at a 2MHz switching

frequency, thereby providing superior transient response and

allowing for the use of a small inductor. ISL8002B also has

excellent stability.

The ISL8002B integrates very low rDS(ON) MOSFETs in order to

maximize efficiency. In addition, since the high-side MOSFET is a

PMOS, the need for a boot capacitor is eliminated, thereby

reducing external component count.

The device can be configured for either PFM (discontinuous

conduction) or PWM (continuous conduction) operation at light

load. PFM provides high efficiency by reducing switching

losses at light loads and PWM for fast transient response,

which helps reduce the output noise and RF interference.

The device is offered in a space saving 8 Ld 2mmx2mm TDFN

Pb-free package with exposed pad for improved thermal

performance. The complete converter occupies less than

64mm2 area.

Features

• VIN range 2.7V to 5.5V

• IOUT maximum is 2A

• External soft-start programmable

• Output tracking and sequencing

• Switching frequency is 2MHz

• Selectable PFM or PWM operation option

• Overcurrent and short-circuit protection

• Over-temperature/thermal protection

• VIN undervoltage lockout and VOUT overvoltage protection

• Up to 95% peak efficiency

Applications

• General purpose POL

• Industrial, instrumentation and medical equipment

• FPGAs

• Telecom and networking equipment

• Game console