Datasheet > AIC1550PPTB

AIC1550PPTB

更新时间： 2024-09-24 04:31:59

品牌	Logo	应用领域
沛亨 - AIC		转换器
页数	文件大小	规格书
15页	957K
描述
Low-Noise Synchronous PWM Step-Down DC/DC Converter

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AIC1550PPTB 数据手册

AIC1550

Low-Noise Synchronous PWM Step-Down

DC/DC Converter

ꢀDESCRIPTION

ꢀFEATURES

The AIC1550 is a low-noise pulse-width-

95% Efficiency or up

ꢁ

modulated (PWM) DC-DC step-down converter.

It powers logic circuits in PDAs and small

wireless systems such as cellular phones,

handy-terminals.

800mA Guaranteed Output Current.

Adjustable Output Voltage from 0.75V to VIN

of a range from +2.5V to 6.5V.

Very Low Quiescent Current: 35µA (Typ.).

ꢁ

Fixed- 500KHz or Adjustable Frequency

Synchronous PWM Operation.

The device features an internal synchronous

rectifier for high conversion efficiency. Excellent

noise characteristics and fixed-frequency

operation provide easy post-filtering. The

AIC1550 is ideally suited for Li-ion battery

applications. It is also suitable for +3V or +5V

fixed input applications. The device can operate

in either one of the following four modes.

Synchronizable

Frequency up to 1MHz.

external

Switching

ꢁ

Accurate Reference: 0.75V (±2%).

100% Duty Cycle in Dropout.

Low Profile 8-Pin MSOP Package.

ꢁ

ꢀAPPLICATIONS

PDAs.

ꢁ

(1) Forced PWM mode operates at a

fixed frequency regardless of the

load.

Digital Still Cameras.

ꢁ

Handy-Terminals.

ꢁ

Cellular Phones.

ꢁ

CPU I/O Supplies.

(2) Synchronizable

PWM

mode

ꢁ

Cordless Phones.

ꢁ

allows the synchronization by

using an external switching

Notebook Chipset Supplies.

Battery-Operated Devices (4 NiMH/ NiCd or 1

Li-ion Cells).

frequency

with

minimum

harmonics.

(3) PWM/PFM Mode extends battery

life by switching to a PFM pulse-

skipping mode under light loads.

(4) Shutdown mode sets device to

standby, reducing supply current

to 0.1µA or under.

The AIC1550 can deliver over 800mA output

current. The output voltage can be adjusted

from 0.75V to VIN ranging from +2.5V to +6.5V.

Other features of the AIC1550 include low

quiescent current, low dropout voltage, and a

0.75V reference of ±2% accuracy. It is available

in a space-saving 8-pin MSOP package.

Analog Integrations Corporation

Si-Soft Research Center

3A1, No.1, Li-Hsin Rd. I , Science Park , Hsinchu 300, Taiwan , R.O.C.

DS-1550P-04 010405

TEL: 886-3-5772500 FAX: 886-3-5772510 www.analog.com.tw

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中文翻译

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