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ADP171-BL1-EVZ

更新时间： 2024-11-23 12:27:59
品牌 Logo 应用领域
亚德诺 - ADI 稳压器
页数 文件大小 规格书
20页 538K
描述
300 mA, Low Quiescent Current, CMOS Linear Regulators

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300 mA, Low Quiescent Current,  
CMOS Linear Regulators  
ADP170/ADP171  
TYPICAL APPLICATION CIRCUITS  
FEATURES  
Maximum output current: 300 mA  
Input voltage range: 1.6 V to 3.6 V  
Low quiescent current  
V
V
IN  
OUT  
1
2
3
VIN  
5
VOUT  
C1  
C2  
ADP170  
GND  
I
I
GND = 23 μA with 0 mA load  
GND = 170 μA with 300 mA load  
ON  
EN  
NC  
4
Low shutdown current: <1 μA  
OFF  
Low dropout voltage: 66 mV at 300 mA load  
Output voltage accuracy: 1ꢀ  
Up to 31 fixed-output voltage options available from 0.8 V to  
3.0 V  
Figure 1. ADP170 with Fixed Output Voltage, 1.8 V  
V
= 2.3V  
IN  
V
= 1.8V  
Adjustable-output voltage range  
0.8 V to 3.0 V (ADP171)  
OUT  
1
2
3
VIN  
5
4
VOUT  
ADJ  
C
C
OUT  
IN  
1µF  
ADP171  
GND  
1µF  
Accuracy over line, load, and temperature: 3ꢀ  
Stable with small 1 μF ceramic output capacitor  
PSRR performance of 70 dB at 10 kHz and 73 dB at 1 kHz  
Low noise: 30 μV rms at VOUT = 0.8 V  
Current limit and thermal overload protection  
Logic-controlled enable  
R1  
ON  
EN  
OFF  
R2  
Figure 2. ADP171 with Adjustable Output Voltage  
Compact 5-lead TSOT package  
APPLICATIONS  
Mobile phones  
Digital camera and audio devices  
Portable and battery-powered equipment  
DSP/FPGA/microprocessor supplies  
Post dc-dc regulation  
GENERAL DESCRIPTION  
The ADP170/ADP171 are low voltage input, low quiescent  
current, low-dropout (LDO) linear regulators that operate from  
1.6 V to 3.6 V and provide up to 300 mA of output current. The  
low 66 mV dropout voltage at 300 mA load improves efficiency  
and allows operation over a wide input voltage range. The low  
23 μA of quiescent current at a 0 mA load makes the ADP170/  
ADP171 ideal for battery-operated portable equipment.  
performance and occupy minimal board space. Compared with  
commodity types of LDOs, the ADP170/ADP171 provide 20 dB  
to 40 dB better power supply rejection ratio (PSRR) at 100 kHz,  
making the ADP170/ADP171 an ideal power source for analog-  
to-digital converter (ADC) mixed-signal processor systems and  
allowing use of smaller size bypass capacitors. In addition, low  
output noise performance without the need for an additional  
bypass capacitor further reduces printed circuit board (PCB)  
component count.  
The ADP170 is capable of 31 fixed-output voltage options, ranging  
from 0.8 V to 3.0 V. ADP171 is an adjustable version, which allows  
output voltages that range from 0.8 V to 3.0 V via an external  
divider. The ADP170/ADP171 are optimized for stable operation  
with small 1 μF ceramic output capacitors. Ideal for powering  
digital processors, the ADP170/ADP171 exhibit good transient  
Short-circuit protection and thermal overload protection circuits  
prevent damage in adverse conditions. The ADP170/ADP171  
are available in tiny 5-lead TSOT for the smallest footprint  
solution to meet a variety of portable power applications.  
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  
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 registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
www.analog.com  
Fax: 781.461.3113 ©2009–2010 Analog Devices, Inc. All rights reserved.  
 
 
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