ISL8024AIRTAJZ Intersil Corporation, ISL8024AIRTAJZ Datasheet

ISL8024AIRTAJZ

Manufacturer Part Number

ISL8024AIRTAJZ

Description

Manufacturer

Intersil Corporation

Datasheets

1.ISL8024IRTAJZ.pdf (19 pages)

2.ISL8023IRTAJZ.pdf (19 pages)

3.ISL8023AIRTAJZ.pdf (20 pages)

Specifications of ISL8024AIRTAJZ

Pack_quantity

100

Comm_code

85423990

Lead_time

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Compact Synchronous Buck Regulator

ISL8023, ISL8024

The ISL8023, ISL8024 are highly efficient, monolithic,

synchronous step-down DC/DC converters that can deliver 3A

(ISL8023) or 4A (ISL8024) of continuous output current from a

2.7V to 5.5V input supply. The devices uses current mode control

architecture to deliver very low duty cycle operation at high

frequency with fast transient response and excellent loop stability.

The ISL8023 and ISL8024 integrate a very low On-resistance

P-Channel (45mΩ) high side FET and N-Channel (19mΩ) low

side FET to maximize efficiency and minimize external

component count. The 100% duty-cycle operation allows less

than 200mV dropout voltage at 4A output current. The

operation frequency of the pulse-width modulator (PWM) is

adjustable from 500kHz to 4MHz. The default switching

frequency of 1MHz is set by connecting the FS pin high, which

allows for the use of small external components.

The ISL8023, ISL8024 can be configured for discontinuous or

forced continuous operation at light load. Forced continuous

operation reduces noise and RF interference while

discontinuous mode provides higher efficiency by reducing

switching losses at light loads.

Fault protection is provided by internal hiccup mode current

limiting during short circuit and overcurrent conditions. Other

protection, such as overvoltage and over-temperature are also

integrated into the device. A power-good output voltage

monitor indicates when the output is in regulation.

The ISL8023, ISL8024 offer a 1ms Power-Good (PG) timer at

power-up. When in shutdown, ISL8023, ISL8024 discharges

the output capacitor through an internal soft-stop switch. Other

features include internal fixed or adjustable soft-start and

internal/external compensation.

The ISL8023 and ISL8024 are offered in a space saving 16 Ld

3x3 Pb-free QFN package with an exposed pad for improved

thermal performance and 1mm maximum height. The

complete converter occupies less than 0.22 in

Various fixed output voltages are available upon request. See

the “Ordering Information” on page 4 for more details.

March 1, 2012

FN7812.1

FIGURE 1. EFFICIENCY T = +25°C V

100

area.

0.0

3.3V

0.5

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

3.3V

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

OUT

1.0

OUT

PWM

PFM

1.5

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

OUT

2.0

Features

• 2.7V to 5.5V Input Voltage Range

• Very Low On-Resistance FET’s - P-Channel 45mΩ and

• High Efficiency Synchronous Buck Regulator with up to 95%

• 0.8% Reference Accuracy Over-temperature/Load/Line

• Complete BOM with as Few as 3 External Parts

• Start-up with Pre-Biased Output

• Internal Soft-Start - 1ms or Adjustable

• Soft-Stop Output Discharge During Disabled

• Adjustable Frequency from 500kHz to 4MHz - Default at

• External Synchronization up to 4MHz

• Over-temperature, Overcurrent, Overvoltage and Negative

• Tiny 3x3 QFN package

Applications

• DC/DC POL Modules

• μC/uP, FPGA and DSP Power

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

• Portable Instruments

• Test and Measurement Systems

• Li-ion Battery Powered Devices

Related Literature

• See AN1660, “3A/4A Low Quiescent Current High Efficiency

(A)

N-channel 19mΩ Typical Values

Efficiency

1MHz (8023/24), 2MHz (8023A/24A)

Overcurrent protection

Synchronous Buck Regulator”

2.5

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

3.0

= 5V

3.5

4.0

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