Datasheet > CDRH2D14NP-1R5

CDRH2D14NP-1R5

更新时间： 2024-11-09 09:22:39

品牌	Logo	应用领域
英特矽尔 - INTERSIL		转换器
页数	文件大小	规格书
17页	778K
描述
3MHz Dual Step-Down Converters and Dual Low-Input LDOs

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CDRH2D14NP-1R5 数据手册

3MHz Dual Step-Down Converters and Dual Low-Input

LDOs with I C Compatible Interface

ISL9305

Features

The ISL9305 is an integrated mini Power Management IC

(mini-PMIC) ideal for applications of powering low-voltage

microprocessor or multiple voltage rails with battery as input

sources, such as a single Li-ion or Li-Polymer. ISL9305

integrates two high-efficiency 3MHz synchronous step-down

converters (DCD1 and DCD2) and two low-input, low-dropout

linear regulators (LDO1 and LDO2).

• Dual 800mA, Synchronous Step-down Converters and Dual

300mA, General-purpose LDOs

• Input Voltage Range

- DCD1/DCD2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3V to 5.5V

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

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

Between the Host Controller and the ISL9305

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

• Adjustable Output Voltage

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

- Fixed Output I C Programmability

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

through I C interface to operate in forced PWM mode

regardless of the load current condition. The I C interface

• LDO1/LDO2 Output Voltage I C Programmability

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 800mA load

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

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

for each Enabled LDO

current. The default output voltage can be set from 0.8V to V

using external feedback resistors on the adjustable version, or

the ISL9305 can be ordered in factory pre-set power-up default

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

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

Voltages

• DCD1/DCD2 I C Programmable Skip Mode Under Light

The ISL9305 also provides two 300mA low dropout (LDO)

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

power-up 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

• PDAs, Portable Media Players, Portable Instruments

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

• DSP Core Power

The ISL9305 is available in a 4mmx4mm 16 Ld TQFN

package.

Related Literature

• FN7724, ISL9305H Data Sheet

• AN1564 “ISL9305IRTZEVAL1Z and ISL9305HIRTZEVAL1Z

Evaluation Boards”

= 1.5µH

800mA

SW1

FB1

2.3V TO 5.5V

VINDCD1

VINDCD2

4.7µF

10µF

= 1.5µH

800mA

SDAT

SCLK

SW2

FB2

ISL9305

1.5V TO 5.5V

VINLDO1

4.7µF

1µF

300mA

VOLDO1

VOLDO2

VINLDO2

1µF

GNDDCD1GNDDCD2GNDLDO

1µF

*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

FN7605.0

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.

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