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ADP7157 PDF Datasheet ( 特性, スペック, ピン接続図 )

部品番号 ADP7157
部品説明 RF Linear Regulator
メーカ Analog Devices
ロゴ Analog Devices ロゴ 



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ADP7157 Datasheet, ADP7157 PDF,ピン配置, 機能
Data Sheet
1.2 A, Ultralow Noise,
High PSRR, RF Linear Regulator
ADP7157
FEATURES
Input voltage range: 2.3 V to 5.5 V
Adjustable output voltage range (VOUT): 1.2 V to 3.3 V
Maximum load current: 1.2 A
Low noise
0.9 µV rms typical output noise from 100 Hz to 100 kHz
1.6 µV rms typical output noise from 10 Hz to 100 kHz
Noise spectral density: 1.7 nV/√Hz from 10 kHz to 1 MHz
Power supply rejection ratio (PSRR)
82 dB from 1 kHz to 100 kHz
55 dB at 1 MHz
Dropout voltage: 120 mV typical at IOUT = 1.2 A, VOUT = 3.3 V
Initial accuracy: ±0.6% at ILOAD = 10 mA
Accuracy over line, load, and temperature: ±1.5%
Operating supply current (IGND)
4.0 mA typical at 0 µA
7.0 mA typical at 1.2 A
Low shutdown current: 0.2 μA typical
Stable with a 10 µF ceramic output capacitor
10-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC packages
Precision enable
Supported by ADIsimPower tool
APPLICATIONS
Regulation to noise sensitive applications: phase-locked
loops (PLLs), voltage controlled oscillators (VCOs), and
PLLs with integrated VCOs
Communications and infrastructure
Backhaul and microwave links
GENERAL DESCRIPTION
The ADP7157 is an adjustable linear regulator that operates from
2.3 V to 5.5 V and provides up to 1.2 A of output current. Output
voltages from 1.2 V to 3.3 V are possible depending on the model.
Using an advanced proprietary architecture, the device provides
high power supply rejection and ultralow noise, achieving excellent
line and load transient response with only a 10 µF ceramic
output capacitor.
The ADP7157 is available in four models that optimize power
dissipation and PSRR performance as a function of the input
and output voltage. See Table 9 and Table 10 for selection guides.
The typical output noise the ADP7157 regulator is 0.9 μV rms from
100 Hz to 100 kHz and 1.7 nV/√Hz for noise spectral density from
10 kHz to 1 MHz. The ADP7157 is available in 10-lead, 3 mm ×
3 mm LFCSP and 8-lead SOIC packages, making it not only a
very compact solution, but also providing excellent thermal
performance for applications requiring up to 1.2 A of output
current in a small, low profile footprint.
Rev. A
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
TYPICAL APPLICATION CIRCUIT
VIN = 3.8V
CIN
10µF
ON
OFF
CBYP
1µF
CREG
1µF
ADP7157
VIN VOUT
VOUT_SENSE
EN REF
BYP
REF_SENSE
VREG
GND
VOUT = 3.3V
COUT
10µF
CREF
1µF
R1
VOUT = 1.2V × (R1 + R2)/R2
R2
1kΩ < R2 < 200kΩ
Figure 1. Regulated 3.3 V Output from a 3.8 V Input
Table 1. Related Devices
Model
Input
Output
Voltage Current
ADP7159, 2.3 V to 2 A
ADP7158 5.5 V
ADP7156 2.3 V to 1.2 A
5.5 V
ADM7150, 4.5 V to 800 mA
ADM7151 16 V
ADM7154, 2.3 V to 600 mA
ADM7155 5.5 V
ADM7160 2.2 V to 200 mA
5.5 V
1k
100
Fixed/
Adjustable
Fixed
Fixed/
Adjustable
Fixed/
Adjustable
Fixed/
Adjustable
Fixed
Package
10-lead LFCSP/
8-lead SOIC
10-lead LFCSP/
8-lead SOIC
8-lead LFCSP/
8-lead SOIC
8-lead LFCSP/
8-lead SOIC
6-lead LFCSP/
5-lead TSOT
CBYP = 1µF
CBYP = 10µF
CBYP = 100µF
CBYP = 1000µF
10
1
0.1
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
Figure 2. Noise Spectral Density at Different Values of CBYP, VOUT = 3.3 V
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com

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