1

®

FN6616.0

ISL8012

2A Low Quiescent Current 1MHz High

Efficiency Synchronous Buck Regulator

The ISL8012 is a high efficiency, monolithic, synchronous

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

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

uses a current control architecture to deliver very low duty

cycle operation at high frequency with fast transient

response and excellent loop stability.

The ISL8012 integrates a pair of low ON-resistance

P-Channel and N-Channel internal MOSFETs to maximize

efficiency and minimize external component count. The

100% duty-cycle operation allows less than 240mV dropout

voltage at 2A output current. High 1MHz pulse-width

modulation (PWM) switching frequency allows the use of

small external components.

The ISL8012 can be configured for discontinuous or forced

continuous operation at light load. Forced continuous

operation reduces noise and RF interference while

discontinuous mode provides high efficiency by reducing

switching losses at light loads.

Fault protection is provided by internal current limiting during

short circuit and overcurrent conditions, an output over

voltage comparator and over-temperature monitor circuit. A

power good output voltage monitor indicates when the

output is in regulation.

The ISL8012 offers a 1ms Power Good (PG) timer at

power-up. When shutdown, ISL8012 discharges the output

capacitor. Other features include internal soft-start, internal

compensation, overcurrent protection, and thermal

shutdown.

The ISL8012 is offered in a space saving 3mmx3mm 10 Ld

DFN package lead free package with exposed pad lead

frames for low thermal. The complete converter occupies

Features

• High Efficiency Synchronous Buck Regulator with up to

95% Efficiency

• Power-Good (PG) Output with a 1ms Delay

• 2.7V to 5.5V Supply Voltage

• 3% Output Accuracy Over-Temperature/Load/Line

• 2A Guaranteed Output Current

• Start-up with Pre-Biased Output

• Internal Soft-Start - 1ms

• Soft-Stop Output Discharge During Disabled

• 40µA Quiescent Supply Current in PFM Mode

• Selectable Forced PWM Mode and PFM Mode

• Less than 1µA Logic Controlled Shutdown Current

• 100% Maximum Duty Cycle

• Internal Current Mode Compensation

• Peak Current Limiting and Hiccup Mode Short Circuit

Protection

• Over-Temperature Protection

• Small 10 Ld 3mmx3mm DFN

• Pb-Free (RoHS Compliant)

Applications

• DC/DC POL Modules

• µC/µP, FPGA and DSP Power

• Plug-in DC/DC Modules for Routers and Switchers

• Portable Instruments

• Test and Measurement Systems

• Li-ion Battery Powered Devices

• Small Form Factor (SFP) Modules

• Bar Code Readers

Pinout

ISL8012

(10 LD DFN)

TOP VIEW

Ordering Information

PART

NUMBER

(Note)

PART

MARKING

TEMP.

RANGE

(°C)

PACKAGE

(Pb-free)

PKG.

DWG. #

ISL8012IRZ*

012Z

-40 to +85 10 Ld 3x3 DFN L10.3x3C

*Add “-T” suffix for tape and reel. Please refer to TB347 for details

on reel specifications.

NOTE: These Intersil Pb-free plastic packaged products employ

special Pb-free material sets; molding compounds/die attach

materials and 100% matte tin plate PLUS ANNEAL - e3 termination

finish, which is RoHS compliant and compatible with both SnPb and

Pb-free soldering operations. Intersil Pb-free products are MSL

classified at Pb-free peak reflow temperatures that meet or exceed

the Pb-free requirements of IPC/JEDEC J STD-020.

VIN

VCC

EN

PG

LX

PGND

SGND

VFB

MODE

RSI

2

3

4

1

5

9

8

7

10

6

Data Sheet

March 11, 2008

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

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

Copyright Intersil Americas Inc. 2008. All Rights Reserved

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