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| 型号： | ADP224ACPZ-2818-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 2.8V/1.8V .3A 8-LFCSP |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 2.8V，1.8V |
| 输入电压： | 2.5 V ~ 5.5 V |
| 电压 - 压降（标准）： | 0.17V @ 300mA，- |
| 稳压器数量： | 2 |
| 电流 - 输出： | 300mA |
| 电流 - 限制（最小）： | 340mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-UFDFN 裸露焊盘，CSP |
| 供应商设备封装： | 8-LFCSP-UD（2x2） |
| 包装： | 标准包装 |
| 其它名称： | ADP224ACPZ-2818-R7DKR |
Dual, 300 mA Output, Low Noise,
High PSRR Voltage Regulators
Data Sheet
FEATURES
Input voltage range: 2.5 V to 5.5 V
TYPICAL APPLICATION CIRCUITS
V IN = 4.2V
Small, 8-lead, 2 mm × 2 mm LFCSP package
Initial accuracy: ±1%
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
OFF
OFF
+ C1
1μF
ON
ON
1 EN1 ADJ1 8
ADP223/
ADP225
2 EN2 VOUT1 7
3 GND VIN 6
R2
R1
VOUT2 = 2.0V
+ C2
1μF
+ C3
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
4 ADJ2
VOUT2 5
VOUT1 = 2.8V
R3
1μF
R4
Overcurrent and thermal protection
APPLICATIONS
Portable and battery-powered equipment
Portable medical devices
V IN = 4.2V
+ C1
1μF
Post dc-to-dc regulation
Point of sale terminals
Credit card readers
Automatic meter readers
Wireless network equipment
OFF
OFF
ON
ON
1
2
EN1
EN2
SENSE1 8
ADP222/
ADP224
VOUT1 7
VOUT1 = 1.5V
+ C2
1μF
3
GND
VIN 6
VOUT2 = 3.3V
4
SENSE2
VOUT2 5
+ C3
1μF
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.
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 ADP222 / ADP223 / ADP224 / ADP225 maintain power
supply rejection greater than 60 dB for frequencies as high as
100 kHz while operating with a low headroom voltage. The
performance than competing LDOs without the need for a
noise bypass capacitor. Overcurrent and thermal protection
circuitry prevent damage in adverse conditions.
The ADP224 and ADP225 are identical to the ADP222 and
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.
Rev. D
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
rights of third parties that may result from its 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 and registered trademarks 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 ?2011–2013 Analog Devices, Inc. All rights reserved.
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