Datasheet > ISL9305IRTHAANLZ-T

ISL9305IRTHAANLZ-T

更新时间： 2024-11-13 11:13:07

品牌	Logo	应用领域
英特矽尔 - INTERSIL		转换器
页数	文件大小	规格书
16页	650K
描述
3MHz Dual 1.5A Step-Down Converters and Dual Low-Input LDOs with I2C Compatible

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3MHz Dual 1.5A Step-Down Converters and Dual

Low-Input LDOs with I C Compatible Interface

ISL9305H

Features

ISL9305H is an integrated mini Power Management IC (mini-

PMIC) for powering low-voltage microprocessor, or applications

using a single Li-Ion or Li-Polymer cell battery to power multiple

voltage rails. ISL9305H integrates two high-efficiency 3MHz

synchronous step-down converters (DCD1 and DCD2) and two

low-input, low-dropout linear regulators (LDO1 and LDO2).

• Dual 1.5A, Synchronous Step-down Converters and Dual

300mA, General-purpose LDOs

• Input Voltage Range

- DCD1/DCD2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5V to 5.5V

- LDO1/LDO2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5V to 5.5V

• 400kb/s I C-Bus Series Interface Transfers the Control Data

The 3MHz PWM switching frequency allows the use of very

small external inductors and capacitors. Both step-down

converters can enter skip mode under light load conditions to

further improve the efficiency and maximize the battery life.

For noise sensitive applications, they can also be programmed

Between the Host Controller and the ISL9305H

• Adjustable Output Voltage

- DCD1/DCD2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.8V to V

- Fixed Output I C Programmability

through I C interface to operate in forced PWM mode

• At 25mV/Step . . . . . . . . . . . . . . . . . . . . . . . . . .0.825V to 3.6V

regardless of the load current condition. The I C interface

supports on-the-fly slew rate control of the output voltage from

0.825V to 3.6V at 25mV/step size for dynamic power saving.

Each step-down converter can supply up to 1.5A load current.

The default output voltage can be set from 0.8V to VIN using

external feedback resistors on the adjustable version, or the

ISL9305H can be ordered in factory pre-set power-up default

voltages in increments of 100mV from 0.9V to 3.6V.

• LDO1/LDO2 Output Voltage I C Programmability

- At 50mV/Step . . . . . . . . . . . . . . . . . . . . . . . . . . 0.9V to 3.3V

• 50μA I (Typ) with DCD1/DCD2 in Skip Mode; 20μA I (Typ)

for Each Enabled LDO

• On-the-fly I C Programming of DC/DC and LDO Output

Voltages

ISL9305H also provides two 300mA low dropout (LDO)

• DCD1/DCD2 I C Programmable Skip Mode Under Light

regulators. The input voltage range is 1.5V to 5.5V allowing them

to be powered from one of the on-chip step-down converters or

directly from the battery. The default LDO output comes with

factory pre-set fixed output voltage options between 0.9V to 3.3V.

Load or Forced Fixed Switching Frequency PWM Mode

• Small, Thin 4mmx4mm TQFN Package

Applications

• Cellular Phones, Smart Phones

ISL9305H is available in a 4mmx4mm 16 Ld TQFN package.

• PDAs, Portable Media Players, Portable Instruments

• Single Li-Ion/Li-Polymer Battery-Powered Equipment

• DSP Core Power

Related Literature

• FN7605, ISL9305 Data Sheet

• AN1564 “ISL9305IRTZEVAL1Z and ISL9305HIRTZEVAL1Z

Evaluation Boards”

= 1.5µH

1.5A

SW1

FB1

2.5V TO 5.5V

VINDCD1

10µF

VINDCD2

10µF

= 1.5µH

1.5A

SDAT

SCLK

SW2

FB2

ISL9305H

10µF

1.5V TO 5.5V

VINLDO1

1µF

300mA

VOLDO1

VOLDO2

1.5V TO 5.5V

VINLDO2

GNDDCD1 GNDDCD2

1µF

GNDLDO

*ONLY FOR ADJUSTABLE OUTPUT VERSION. FOR FIXED OUTPUT VERSION, DIRECTLY

CONNECT THE FB PIN TO THE OUTPUT OF THE BUCK CONVERTER.

FIGURE 1. TYPICAL APPLICATION DIAGRAM

November 8, 2010

FN7724.0

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

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.

12 3 4 5 6 7...16

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与ISL9305IRTHAANLZ-T相关器件

型号	品牌	获取价格	描述	数据表
ISL9305IRTHBCNLZEV1Z	RENESAS	获取价格	3MHz Dual 1.5A Step-Down Converters and Dual Low-Input LDOs with I2C Compatible Interface
ISL9305IRTHBCNLZ-T	INTERSIL	获取价格	3MHz Dual 1.5A Step-Down Converters and Dual Low-Input LDOs with I2C Compatible
ISL9305IRTHBCNLZ-T	RENESAS	获取价格	3MHz Dual 1.5A Step-Down Converters and Dual Low-Input LDOs with I2C Compatible Interface
ISL9305IRTHBFNCZEV1Z	RENESAS	获取价格	3MHz Dual 1.5A Step-Down Converters and Dual Low-Input LDOs with I2C Compatible Interface
ISL9305IRTHBFNCZ-T	INTERSIL	获取价格	3MHz Dual 1.5A Step-Down Converters and Dual Low-Input LDOs with I2C Compatible
ISL9305IRTHBFNCZ-T	RENESAS	获取价格	3MHz Dual 1.5A Step-Down Converters and Dual Low-Input LDOs with I2C Compatible Interface
ISL9305IRTHWBNLZEV1Z	RENESAS	获取价格	3MHz Dual 1.5A Step-Down Converters and Dual Low-Input LDOs with I2C Compatible Interface
ISL9305IRTHWBNLZ-T	INTERSIL	获取价格	3MHz Dual 1.5A Step-Down Converters and Dual Low-Input LDOs with I2C Compatible
ISL9305IRTHWBNLZ-T	RENESAS	获取价格	3MHz Dual 1.5A Step-Down Converters and Dual Low-Input LDOs with I2C Compatible Interface
ISL9305IRTHWCLBZEV1Z	RENESAS	获取价格	3MHz Dual 1.5A Step-Down Converters and Dual Low-Input LDOs with I2C Compatible Interface

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