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ADP223CP-EVALZ PDF预览

ADP223CP-EVALZ

更新时间: 2024-09-15 12:20:47
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亚德诺 - ADI /
页数 文件大小 规格书
24页 750K
描述
Dual, 300 mA Output, Low Noise

ADP223CP-EVALZ 数据手册

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Dual, 300 mA Output, Low Noise,  
High PSRR Voltage Regulators  
Data Sheet  
ADP222/ADP223/ADP224/ADP225  
FEATURES  
TYPICAL APPLICATION CIRCUITS  
V
= 4.2V  
IN  
Input voltage range: 2.5 V to 5.5 V  
Small, 8-lead, 2 mm × 2 mm LFCSP package  
Initial accuracy: 1%  
+
C1  
1µF  
R2  
R1  
ON  
OFF  
High PSRR: 70 dB at 10 kHz, 60 dB at 100 kHz, 40 dB at 1 MHz  
Low noise: 27 µV rms at VOUT = 1.2 V, 50 µV rms at VOUT = 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)  
1
2
3
4
8
7
6
5
EN1  
ADJ1  
ADP223/  
ADP225  
ON  
OFF  
VOUT2 = 2.0V  
EN2  
VOUT1  
+
C2  
1µF  
GND  
ADJ2  
VIN  
VOUT1 = 2.8V  
VOUT2  
+
C3  
1µF  
R3  
R4  
Quick output discharge (QOD)ADP224/ADP225  
Overcurrent and thermal protection  
Figure 1. ADP223/ADP225  
APPLICATIONS  
V
= 4.2V  
IN  
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  
+
C1  
1µF  
ON  
ON  
OFF  
1
2
3
4
8
EN1  
SENSE1  
ADP222/  
ADP224  
OFF  
VOUT1 = 1.5V  
7
6
5
EN2  
VOUT1  
+
C2  
1µF  
GND  
VIN  
VOUT2 = 3.3V  
SENSE2  
VOUT2  
+
C3  
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  
©2011 Analog Devices, Inc. All rights reserved.  
 
 
 
 

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