ISL9112IRT7Z Intersil Corporation, ISL9112IRT7Z Datasheet

ISL9112IRT7Z

Manufacturer Part Number

ISL9112IRT7Z

Description

Manufacturer

Intersil Corporation

Datasheet

1.ISL9110IRT7Z.pdf (20 pages)

Specifications of ISL9112IRT7Z

Pack_quantity

100

Comm_code

85423990

Lead_time

555

Current page: 1 of 20
Download datasheet (2Mb)

1.2A High Efficiency Buck-Boost Regulators

ISL9110, ISL9112

The ISL9110 and ISL9112 are highly-integrated Buck-Boost

switching regulators that accept input voltages either above or

below the regulated output voltage. Unlike other Buck-Boost

regulators, these regulators automatically transition between

operating modes without significant output disturbance.

Both parts are capable of delivering up to 1.2A output current,

and provide excellent efficiency due to their fully synchronous

4-switch architecture. No-load quiescent current of only 35µA

also optimizes efficiency under light-load conditions. Forced

PWM and/or synchronization to an external clock may also be

selected for noise sensitive applications.

The ISL9110 is designed for standalone applications and

supports 3.3V and 5V fixed output voltages or variable output

voltages with an external resistor divider. Output voltages as low

as 1V, or as high as 5.2V are supported using an external resistor

divider.

The ISL9112 supports a broader set of programmable features

that may be accessed via an I

programmable output voltage range of 1.9V to 5V, the ISL9112

is ideal for applications requiring dynamically changing supply

voltages. A programmable slew rate can be selected to provide

smooth transitions between output voltage settings.

The ISL9110 and ISL9112 require only a single inductor and very

few external components. Power supply solution size is

minimized by a tiny 3mmx3mm package and a 2.5MHz

switching frequency, which further reduces the size of external

components.

June 16, 2011

FN7649.0

1.8V TO 5.5V

OUTPUTS

STATUS

10µF

FIGURE 1. TYPICAL APPLICATION

PVIN

VIN

MODE

BAT

ISL9110IRTNZ

C bus interface. With a

VOUT

LX1

LX2

FB 12

2.2µH

10µF

3.3V/1A

OUT

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.

Features

• Accepts Input Voltages Above or Below Regulated Output

• Automatic and Seamless Transitions Between Buck and Boost

• Input Voltage Range: 1.8V to 5.5V

• Output Current: Up to 1.2A

• High Efficiency: Up to 95%

• 35µA Quiescent Current Maximizes Light-load Efficiency

• 2.5MHz Switching Frequency Minimizes External Component

• Selectable Forced-PWM Mode and External Synchronization

• I

• Fully Protected for Overcurrent, Over-temperature and

• Small 3mmx3mm TDFN Package

Applications

• Regulated 3.3V from a Single Li-Ion Battery

• Smart Phones and Tablet Computers

• Handheld Devices

• Point-of-Load Regulators

Related Literature

• See AN1648 “ISL9110IRTNZ/IRT7Z/IRTAZ-EVAL1Z Evaluation

• See AN1647 “ISL9112IRTNZ/IRT7Z-EVAL1Z Evaluation Board

Voltage

Modes

Size

Undervoltage

Board User Guide”

User Guide”

100

C Interface (ISL9112)

0.01

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

OUT

= 3V

= 3.3V

= 5V

FIGURE 2. EFFICIENCY

0.05

= 2.5V

OUT

(A)

0.25

1.25

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