Datasheet > ISL78228ARZ

ISL78228ARZ

更新时间： 2024-11-19 11:12:43

品牌	Logo	应用领域
英特矽尔 - INTERSIL		稳压器
页数	文件大小	规格书
18页	1795K
描述
Dual 800mA Low Quiescent Current 2.25MHz High Efficiency Synchronous Buck Regulator

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ISL78228ARZ 数据手册

Dual 800mA Low Quiescent Current 2.25MHz High

Efficiency Synchronous Buck Regulator

ISL78228

Features

The ISL78228 is a high efficiency, dual synchronous step-down

DC/DC regulator that can deliver up to 800mA continuous

output current per channel. The supply voltage range of 2.75V

to 5.5V allows for the use of a 3.3V or 5V input. The current

mode control architecture enables very low duty cycle

operation at high frequency with fast transient response and

excellent loop stability. The ISL78228 operates above the AM

radio band as well as the 2.25MHz switching frequency,

allowing for the use of small, low cost inductors and

capacitors. Each channel is optimized for generating an output

voltage as low as 0.6V.

• Internal Current Mode Compensation

• 100% Maximum Duty Cycle for Lowest Dropout

• Selectable Forced PWM Mode and PFM Mode

• External Synchronization up to 4MHz

• Start-up with Pre-biased Output

• Soft-Stop Output Discharge During Disabled

• Internal Digital Soft-Start - 2ms

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

• TS16949 Compliant

The ISL78228 has a user configurable mode of

• AEC - Q100 Tested

operation-forced PWM mode and PFM/PWM mode. The forced

PWM mode operation reduces noise and RF interference while

the PFM mode operation provides high efficiency by reducing

switching losses at light loads. In PFM mode of operation, both

channels draw a total quiescent current of only 30µA, hence

enabling high light load efficiency in order to maximize battery

life.

• Pb-free (RoHS Compliant)

Applications

• DC/DC POL Modules

• µC/µP, FPGA and DSP Power

• Rear Camera Systems

• Navigation Systems

The ISL78228 offers a 1ms Power-Good (PG) to monitor both

outputs at power-up. When shutdown, ISL78228 discharges

the outputs capacitor. Other features include internal digital

soft-start, enable for power sequence, overcurrent protection,

and thermal shutdown. The ISL78228 is offered in a

• Infotainment Systems

3mmx3mm 10 Ld DFN package with 1mm maximum height.

The complete converter occupies less than 1.8cm area.

The ISL78228 is both AEC - Q100 rated and fully TS16949

compliant. The ISL78228 is rated for the automotive

temperature range (-40°C to +105°C).

100

2.5V

-PFM

OUT

1.8V

-PFM

OUT

-PWM

2.5V

OUT

1.8V

-PWM

OUT

VIN = 5V

0.0 0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

OUTPUT LOAD (A)

FIGURE 1. EFFICIENCY CHARACTERISTICS CURVE

May 2, 2011

FN7849.0

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...18

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与ISL78228ARZ相关器件

型号	品牌	获取价格	描述	数据表
ISL78228ARZ-T13	RENESAS	获取价格	DUAL SWITCHING CONTROLLER
ISL78228ARZ-T7	RENESAS	获取价格	DUAL SWITCHING CONTROLLER
ISL78229	INTERSIL	获取价格	2-Phase Boost Controller with Drivers
ISL78229	RENESAS	获取价格	2-Phase Boost Controller with Drivers and I2C/PMBus
ISL78229ARZ	INTERSIL	获取价格	2-Phase Boost Controller with Integrated Drivers
ISL78229ARZ	RENESAS	获取价格	2-Phase Boost Controller with Drivers and I2C/PMBus
ISL78229EV1Z	INTERSIL	获取价格	2-Phase Boost Controller with Drivers
ISL78229EV1Z	RENESAS	获取价格	2-Phase Boost Controller with Drivers and I2C/PMBus
ISL78233	RENESAS	获取价格	3A and 4A Compact Synchronous Buck Regulators
ISL78233	INTERSIL	获取价格	Automotive 5A Synchronous Buck Regulator

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