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ADP7102ARDZ-3.3-R7 Datasheet(数据表) 1 Page - Analog Devices

部件型号  ADP7102ARDZ-3.3-R7
说明  20 V, 300 mA, Low Noise, CMOS LDO
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制造商  AD [Analog Devices]
网页  http://www.analog.com
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20 V, 300 mA, Low Noise, CMOS LDO
Data Sheet
ADP7102
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
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
©2011 Analog Devices, Inc. All rights reserved.
FEATURES
Input voltage range: 3.3 V to 20 V
Maximum output current: 300 mA
Low noise: 15 µV rms for fixed output versions
PSRR performance of 60 dB at 10 kHz, VOUT = 3.3 V
Reverse current protection
Low dropout voltage: 200 mV at 300 mA load
Initial accuracy: ±0.8%
Accuracy over line, load, and temperature: −2%, +1%
Low quiescent current (VIN = 5 V), IGND = 750 μA with 300 mA
load
Low shutdown current: 40 µA at VIN = 12 V
Stable with small 1 µF ceramic output capacitor
7 fixed output voltage options: 1.5 V, 1.8 V, 2.5 V, 3 V, 3.3 V,
5 V, and 9 V
Adjustable output from 1.22 V to VIN – VDO
Foldback current limit and thermal overload protection
User programmable precision UVLO/enable
Power good indicator
8-lead LFCSP and 8-lead SOIC packages
APPLICATIONS
Regulation to noise sensitive applications: ADC, DAC
circuits, precision amplifiers, high frequency oscillators,
clocks, and PLLs
Communications and infrastructure
Medical and healthcare
Industrial and instrumentation
TYPICAL APPLICATION CIRCUITS
VOUT = 5V
VIN = 8V
PG
VOUT
VIN
PG
GND
SENSE
EN/
UVLO
RPG
100k
R2
100k
R1
100k
COUT
1µF
CIN
1µF
ON
OFF
+
+
Figure 1. ADP7102 with Fixed Output Voltage, 5 V
VOUT = 5V
VIN = 8V
PG
VOUT
VIN
PG
GND
ADJ
EN/
UVLO
RPG
100k
R4
100k
R3
100k
COUT
1µF
CIN
1µF
ON
OFF
+
+
R2
13kΩ
R1
40.2kΩ
Figure 2. ADP7102 with Adjustable Output Voltage, 5 V
GENERAL DESCRIPTION
The ADP7102 is a CMOS, low dropout linear regulator that
operates from 3.3 V to 20 V and provides up to 300 mA of
output current. This high input voltage LDO is ideal for
regulation of high performance analog and mixed signal
circuits operating from 19 V to 1.22 V rails. Using an
advanced proprietary architecture, it provides high power
supply rejection, low noise, and achieves excellent line and
load transient response with just a small 1 µF ceramic
output capacitor.
The ADP7102 is available in 7 fixed output voltage options and
an adjustable version, which allows output voltages that range
from 1.22 V to VIN − VDO via an external feedback divider.
The ADP7102 output noise voltage is 15 μV rms and is inde-
pendent of the output voltage. A digital power good output
allows power system monitors to check the health of the output
voltage. A user programmable precision undervoltage lockout
function facilitates sequencing of multiple power supplies.
The ADP7102 is available in 8-lead, 3 mm × 3 mm LFCSP
and 8-lead SOIC packages. The LFCSP offers a very compact
solution and also provides excellent thermal performance for
applications requiring up to 300 mA of output current in a
small, low-profile footprint.




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