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Analog Devices Semiconductor Electronic Components Datasheet

ADM7155 Datasheet

RF Linear Regulator

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ADM7155 pdf
Data Sheet
600 mA, Ultralow Noise,
High PSRR, RF Linear Regulator
ADM7155
FEATURES
Input voltage range: 2.3 V to 5.5 V
Output voltage range: 1.2 V to 3.4 V
Maximum load current: 600 mA
Low noise
0.9 µV rms total integrated noise from 100 Hz to 100 kHz
1.6 µV rms total integrated noise from 10 Hz to 100 kHz
Noise spectral density: 1.5 nV/√Hz from 10 kHz to 1 MHz
PSRR: >90 dB from 200 Hz to 200 kHz; 57 dB at 1 MHz
Dropout voltage: 120 mV typical at VOUT = 3.3 V, IOUT = 600 mA
Initial accuracy: ±0.5%
Accuracy over line, load, and temperature: −2.0% (minimum),
+1.5% (maximum)
Quiescent current, IGND = 4 mA at no load
Low shutdown current: 0.2 μA
Stable with a 10 µF ceramic output capacitor
8-lead LFCSP and 8-lead SOIC packages
Precision enable
Supported by ADIsimPower tool
APPLICATIONS
Regulation to noise sensitive applications: PLLs, VCOs, and
PLLs with integrated VCOs
Communications and infrastructure
Backhaul and microwave links
GENERAL DESCRIPTION
The ADM7155 is an adjustable linear regulator that operates
from 2.3 V to 5.5 V and provides up to 600 mA of load current.
Output voltages from 1.2 V to 3.4 V are possible depending on
the model. Using an advanced proprietary architecture, it
provides high power supply rejection and ultralow noise,
achieving excellent line and load transient response with only a
10 µF ceramic output capacitor.
The ADM7155 is available in four models that optimize power
dissipation and PSRR performance as a function of input and
output voltage. See Table 9 and Table 10 for selection guides.
The ADM7155 regulator typical output noise is 0.9 μV rms from
100 Hz to 100 kHz for fixed output voltage options and 1.5 nV/√Hz
for noise spectral density from 10 kHz to 1 MHz. The ADM7155
is available in 8-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 600 mA of load 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 = 3.5V
CIN
10µF
ON
OFF
ADM7155
VIN VOUT
EN REF
CBYP
1µF
VBYP
BYP
REF_SENSE
CREG
10µF
VREG
VREG
GND
VOUT = 3.0V
COUT
10µF
REF = 1.2V
CREF
R1 1µF
VOUT = 1.2V × (R1 + R2)/R2
R2
1kΩ < R2 < 200kΩ
Figure 1. Regulated 3.0 V Output from 3.5 V Input
10k
NOISE FLOOR
1.0µF
3.3µF
1k 10µF
33µF
100µF
330µF
100 1000µF
10
1
0.1
0.1 1 10 100 1k 10k 100k 1M
FREQUENCY (Hz)
Figure 2. Noise Spectral Density for Different Values of CBYP
Table 1. Related Devices
Model
Input
Voltage
ADM7150ACP 4.5 V to 16 V
ADM7150ARD 4.5 V to 16 V
ADM7151ACP 4.5 V to 16 V
ADM7151ARD 4.5 V to 16 V
ADM7154ACP 2.3 V to 5.5 V
ADM7154ARD 2.3 V to 5.5 V
Output
Current
800 mA
800 mA
800 mA
800 mA
600 mA
600 mA
Fixed/
Adj1
Fixed
Fixed
Adj
Adj
Fixed
Fixed
Package
8-Lead LFCSP
8-Lead SOIC
8-Lead LFCSP
8-Lead SOIC
8-Lead LFCSP
8-Lead SOIC
1 Adj means adjustable.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2014 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com


Analog Devices Semiconductor Electronic Components Datasheet

ADM7155 Datasheet

RF Linear Regulator

No Preview Available !

ADM7155 pdf
ADM7155
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Typical Application Circuit ............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 5
Thermal Data ................................................................................ 5
Thermal Resistance ...................................................................... 5
ESD Caution.................................................................................. 5
Pin Configurations and Function Descriptions ........................... 6
Typical Performance Characteristics ............................................. 7
Theory of Operation ...................................................................... 14
REVISION HISTORY
12/14—Rev. 0 to Rev. A
Changes to Figure 35 to Figure 40................................................ 12
Changes to Figure 45...................................................................... 15
10/14—Revision 0: Initial Version
Data Sheet
Applications Information .............................................................. 15
ADIsimPower Design Tool ....................................................... 15
Capacitor Selection .................................................................... 15
Undervoltage Lockout (UVLO) ............................................... 16
Programmable Precision Enable .............................................. 17
Start-Up Time ............................................................................. 17
REF, BYP, and VREG Pins......................................................... 18
Current-Limit and Thermal Overload Protection................. 18
Thermal Considerations............................................................ 18
Printed Circuit Board Layout Considerations............................ 22
Outline Dimensions ....................................................................... 23
Ordering Guide .......................................................................... 24
Rev. A | Page 2 of 24


Part Number ADM7155
Description RF Linear Regulator
Maker Analog Devices
Total Page 24 Pages
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