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ADP1740ACPZ-1.8-R7 PDF预览

ADP1740ACPZ-1.8-R7

更新时间: 2024-11-29 12:27:59
品牌 Logo 应用领域
亚德诺 - ADI 稳压器调节器输出元件
页数 文件大小 规格书
20页 743K
描述
2 A, Low VIN, Low Dropout Linear Regulator

ADP1740ACPZ-1.8-R7 数据手册

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2 A, Low VIN, Low Dropout  
Linear Regulator  
Data Sheet  
ADP1740/ADP1741  
FEATURES  
TYPICAL APPLICATION CIRCUITS  
V
IN  
= 1.8V  
V
= 1.5V  
OUT  
Maximum output current: 2 A  
Input voltage range: 1.6 V to 3.6 V  
Low shutdown current: 2 µA  
Low dropout voltage: 160 mV @ 2 A load  
Initial accuracy: 1%  
Accuracy over line, load, and temperature: 2%  
7 fixed output voltage options with soft start:  
0.75 V to 2.5 V (ADP1740)  
4.7µF  
4.7µF  
14  
VIN VIN VOUT VOUT  
13  
16  
15  
1 VIN  
2 VIN  
3 VIN  
4 EN  
VOUT 12  
ADP1740  
TOP VIEW  
(Not to Scale)  
VOUT 11  
VOUT 10  
SENSE 9  
100kΩ  
PG  
Adjustable output voltage options with soft start:  
0.75 V to 3.3 V (ADP1741)  
High PSRR  
PG GND SS NC  
7
8
5
6
65 dB @ 1 kHz  
10nF  
65 dB @ 10 kHz  
54 dB @ 100 kHz  
23 μV rms at 0.75 V output  
Stable with small 4.7 µF ceramic output capacitor  
Excellent load and line transient response  
Current-limit and thermal overload protection  
Power-good indicator  
Figure 1. ADP1740 with Fixed Output Voltage, 1.5 V  
V
= 1.8V  
V
= 0.5V(1 + R1/R2)  
IN  
OUT  
4.7µF  
4.7µF  
14  
VIN VIN VOUT VOUT  
13  
16  
15  
1 VIN  
2 VIN  
3 VIN  
4 EN  
VOUT 12  
Logic-controlled enable  
Reverse current protection  
ADP1741  
TOP VIEW  
(Not to Scale)  
VOUT 11  
VOUT 10  
100kΩ  
APPLICATIONS  
R1  
PG  
ADJ  
PG GND SS NC  
9
Server computers  
Memory components  
R2  
7
8
5
6
Telecommunications equipment  
Network equipment  
10nF  
DSP/FPGA/microprocessor supplies  
Instrumentation equipment/data acquisition systems  
Figure 2. ADP1741 with Adjustable Output Voltage, 0.75 V to 3.3 V  
GENERAL DESCRIPTION  
voltages ranging from 0.75 V to 3.3 V via an external divider.  
The ADP1740/ADP1741 allow an external soft start capacitor  
to be connected to program the startup. A digital power-good  
output allows power system monitors to check the health of the  
output voltage.  
The ADP1740/ADP1741 are low dropout (LDO) CMOS linear  
regulators that operate from 1.6 V to 3.6 V and provide up to 2 A  
of output current. These low VIN/VOUT LDOs are ideal for regu-  
lation of nanometer FPGA geometries operating from 2.5 V down  
to 1.8 V I/O rails, and for powering core voltages down to 0.75 V.  
Using an advanced, proprietary architecture, the ADP1740/  
ADP1741 provide high power supply rejection ratio (PSRR) and  
low noise, and achieve excellent line and load transient response  
with only a small 4.7 µF ceramic output capacitor.  
The ADP1740/ADP1741 are available in a 16-lead, 4 mm ×  
4 mm LFCSP, making them not only very compact solutions,  
but also providing excellent thermal performance for applica-  
tions that require up to 2 A of output current in a small, low  
profile footprint.  
The ADP1740 is available in seven fixed output voltage options.  
The ADP1741 is an adjustable version that allows output  
Rev. E  
Document Feedback  
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 ©2008–2013 Analog Devices, Inc. All rights reserved.  
Technical Support  
www.analog.com  
 
 
 
 

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