Datasheet > ADP223

ADP223

更新时间： 2024-11-23 12:20:47

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
24页	750K
描述
Dual, 300 mA Output, Low Noise

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ADP223 数据手册

Dual, 300 mA Output, Low Noise,

High PSRR Voltage Regulators

Data Sheet

ADP222/ADP223/ADP224/ADP225

FEATURES

TYPICAL APPLICATION CIRCUITS

= 4.2V

Input voltage range: 2.5 V to 5.5 V

Small, 8-lead, 2 mm × 2 mm LFCSP package

Initial accuracy: 1%

1µF

OFF

High PSRR: 70 dB at 10 kHz, 60 dB at 100 kHz, 40 dB at 1 MHz

Low noise: 27 µV rms at V_OUT= 1.2 V, 50 µV rms at V_OUT= 2.8 V

Excellent transient response

Low dropout voltage: 170 mV at 300 mA load

65 µA typical ground current at no load, both LDOs enabled

Fixed output voltage from 0.8 V to 3.3 V (ADP222/ADP224)

Adjustable output voltage range from 0.5 V to 5.0 V

(ADP223/ADP225)

EN1

ADJ1

ADP223/

ADP225

OFF

VOUT2 = 2.0V

EN2

VOUT1

1µF

GND

ADJ2

VIN

VOUT1 = 2.8V

VOUT2

1µF

Quick output discharge (QOD)—ADP224/ADP225

Overcurrent and thermal protection

Figure 1. ADP223/ADP225

APPLICATIONS

= 4.2V

Portable and battery-powered equipment

Portable medical devices

Post dc-to-dc regulation

Point of sale terminals

Credit card readers

Automatic meter readers

Wireless network equipment

1µF

OFF

EN1

SENSE1

ADP222/

ADP224

OFF

VOUT1 = 1.5V

EN2

VOUT1

1µF

GND

VIN

VOUT2 = 3.3V

SENSE2

VOUT2

1µF

Figure 2. ADP222/ADP224

GENERAL DESCRIPTION

The 300 mA, adjustable dual output ADP223/ADP225 and

fixed dual output ADP222/ADP224 combine high PSRR, low

noise, low quiescent current, and low dropout voltage in a

voltage regulator that is ideally suited for wireless applications

with demanding performance and board space requirements.

100 kHz while operating with a low headroom voltage. The

ADP222/ADP223/ADP224/ADP225 offer much lower noise

performance than competing LDOs without the need for a

noise bypass capacitor. Overcurrent and thermal protection

circuitry prevent damage in adverse conditions.

The ADP222/ADP224 are available with fixed outputs voltages

from 0.8V to 3.3V. The adjustable output ADP223/ADP225 may

be set to output voltages from 0.5 V to 5.0 V. The low quiescent

current, low dropout voltage, and wide input voltage range of

the ADP222/ADP223/ADP224/ADP225 extend the battery life

of portable devices.

The ADP224 and ADP225 are identical to the ADP222 and

ADP223, respectively, but with the addition of a quick output

discharge (QOD) feature.

The ADP222/ADP223/ADP224/ADP225 are available in a

small 8-lead, 2 mm × 2 mm LFCSP package and are stable with

tiny 1 µF, 30% ceramic output capacitors, resulting in the smallest

possible board area for a wide variety of portable power needs.

The ADP222/ADP223/ADP224/ADP225 maintain power

supply rejection greater than 60 dB for frequencies as high as

Rev. B

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rightsof third parties that may result fromits use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks andregisteredtrademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

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