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ADP7112

更新时间： 2024-11-24 02:50:07
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亚德诺 - ADI /
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21页 584K
描述
20 V, 200 mA, Low Noise, CMOS LDO Linear Regulator

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20 V, 200 mA, Low Noise,  
CMOS LDO Linear Regulator  
ADP7112  
Data Sheet  
FEATURES  
TYPICAL APPLICATION CIRCUITS  
Low noise: 11 μV rms independent of fixed output voltage  
PSRR of 88 dB at 10 kHz, 68 dB at 100 kHz, 50 dB at 1 MHz,  
ADP7112  
V
= 6V  
V
= 5V  
OUT  
IN  
VIN  
VOUT  
VOUT = 5 V, VIN = 7 V  
C
C
OUT  
2.2µF  
IN  
2.2µF  
Input voltage range: 2.7 V to 20 V  
Maximum output current: 200 mA  
Initial accuracy: 0.8ꢀ  
Accuracy over line, load, and temperature  
1.8ꢀ, TJ = −40°C to +125°C  
SENSE/ADJ  
ON  
EN  
SS  
C
GND  
SS  
OFF  
1nF  
Figure 1. ADP7112 with Fixed Output Voltage, 5 V  
Low dropout voltage: 200 mV (typical) at a 200 mA load,  
V
OUT = 5 V  
ADP7112  
V
= 7V  
V
= 6V  
User-programmable soft start  
Low quiescent current, IGND = 50 ꢁA (typical) with no load  
Low shutdown current  
IN  
OUT  
VIN  
VOUT  
C
C
OUT  
2.2µF  
IN  
2kΩ  
2.2µF  
SENSE/ADJ  
10kΩ  
ON  
1.8 ꢁA at VIN = 5 V  
3.0 ꢁA at VIN = 20 V  
Stable with a small 2.2 μF ceramic output capacitor  
Fixed output voltage options: 1.8 V, 2.5 V, 3.3 V, and 5.0 V  
15 standard voltages between 1.2 V and 5.0 V are  
available  
EN  
SS  
C
1nF  
GND  
SS  
OFF  
Figure 2. ADP7112 with 5 V Output Adjusted to 6 V  
Adjustable output from 1.2 V to VIN – VDO, output can be  
adjusted above initial set point  
Precision enable  
1 mm × 1.2 mm, 6-ball WLCSP  
APPLICATIONS  
Regulation to noise sensitive applications  
ADC and DAC circuits, precision amplifiers, power for  
VCO VTUNE control  
Communications and infrastructure  
Medical and healthcare  
Industrial and instrumentation  
GENERAL DESCRIPTION  
The ADP7112 is a CMOS, low dropout (LDO) linear regulator  
that operates from 2.7 V to 20 V and provides up to 200 mA of  
output current. This high input voltage LDO is ideal for the  
regulation of high performance analog and mixed-signal circuits  
operating from 19 V down to 1.2 V rails. Using an advanced  
proprietary architecture, the device provides high power supply  
rejection, low noise, and achieves excellent line and load transient  
response with a small 2.2 μF ceramic output capacitor. The  
ADP7112 regulator output noise is 11 ꢀV rms, independent of  
the output voltage for the fixed options of 5 V or less.  
The ADP7112 is available in 15 fixed output voltage options.  
The following voltages are available from stock: 1.2 V  
(adjustable), 1.8 V, 2.5 V, 3.3 V, and 5.0 V. Additional voltages  
available by special order are 1.5 V, 1.85 V, 2.0 V, 2.2 V, 2.75 V,  
2.8 V, 2.85 V, 3.8 V, 4.2 V, and 4.6 V.  
Each fixed output voltage can be adjusted above the initial set  
point with an external feedback divider. This allows the ADP7112  
to provide an output voltage from 1.2 V to VIN − VDO with high  
PSRR and low noise.  
A user-programmable soft start with an external capacitor is  
available in the ADP7112. The ADP7112 is available in a 6-ball  
1 mm × 1.2 mm WLCSP, making it a very compact solution.  
Rev. D  
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  
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 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 ©2014–2020 Analog Devices, Inc. All rights reserved.  
Technical Support  
www.analog.com  
 
 
 
 
 
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