2 A, Ultralow Noise,
High PSRR, RF Linear Regulator
ADP7158
Data Sheet
FEATURES
TYPICAL APPLICATION CIRCUIT
Input voltage range: 2.3 V to 5.5 V
16 standard voltages between 1.2 V and 3.3 V available
Maximum load current: 2 A
ADP7158
V
= 3.8V
V
= 3.3V
IN
OUT
C
VIN
VOUT
C
10µF
IN
OUT
10µF
VOUT_SENSE
Low noise
ON
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: 1.7 nV/√Hz from 10 kHz to 1 MHz
Power supply rejection ratio (PSRR)
EN
REF
OFF
C
REF
1µF
BYP
C
BYP
REF_SENSE
1µF
70 dB from 1 kHz to 100 kHz; 50 dB at 1 MHz, VOUT = 3.3 V,
VREG
C
REG
1µF
V
IN = 4.0 V
GND (EPAD)
Dropout voltage: 200 mV typical at IOUT = 2 A, VOUT = 3.3 V
Initial accuracy: 0.6% at ILOAD = 10 mA
Accuracy over line, load, and temperature: 1.5%
Quiescent current: IGND = 4.0 mA at no load, 9.0 mA at 2 A
Low shutdown current: 0.2 μA
Figure 1.
Stable with a 10 µF ceramic output capacitor
10-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC packages
Precision enable
Table 1. Related Devices
Input
Output
Fixed/
Supported by ADIsimPower tool
Model
Voltage
Current Adj1
Package
ADP7159
2.3 V to 5.5 V
2 A
Adj
10-lead LFCSP/
8-lead SOIC
APPLICATIONS
ADP7156,
ADP7157
ADM7150, 4.5 V to 16 V
ADM7151
ADM7154, 2.3 V to 5.5 V
ADM7155
ADM7160
2.3 V to 5.5 V
1.2 A
Fixed/
Adj
Fixed/
Adj
Fixed/
Adj
Fixed
10-lead LFCSP/
8-lead SOIC
8-lead LFCSP/
8-lead SOIC
8-lead LFCSP/
8-lead SOIC
6-lead LFCSP/
5-lead TSOT
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
800 mA
600 mA
200 mA
2.2 V to 5.5 V
GENERAL DESCRIPTION
The ADP7158 is a linear regulator that operates from 2.3 V to
5.5 V and provides up to 2 A of output current. 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.
1 Adj means adjustable.
1k
C
C
C
C
= 1µF
= 10µF
= 100µF
= 1000µF
BYP
BYP
BYP
BYP
100
10
1
There are 16 standard output voltages for the ADP7158. The
following voltages are available from stock: 1.2 V, 1.8 V, 2.0 V,
2.5 V, 2.8 V, 3.0 V and 3.3 V. Additional voltages available by
special order are 1.3 V, 1.5 V, 1.6 V, 2.2 V, 2.6 V, 2.7 V, 2.9 V,
3.1V and 3.2 V.
The ADP7158 regulator typical output noise 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 ADP7158 is available in a
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
2 A of output current in a small, low profile footprint.
0.1
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Figure 2. Noise Spectral Density at Various Values of CBYP, VOUT = 3.3 V
Rev. B
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
Technical Support
©2016 Analog Devices, Inc. All rights reserved.
www.analog.com