AD EVAL-ADP7159 Power supply rejection ratio Datasheet

EVAL-ADP7159 User Guide
UG-811
One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com
Evaluating the ADP7159 Ultralow Noise, 2 A, Adjustable Output,
RF Linear Regulator
FEATURES
EVALUATION BOARD LAYOUTS
Power supply rejection ratio (PSRR)
68 dB from 1 kHz to 100 kHz; 45 dB at 1 MHz,
V OUT = 3.3 V, VIN = 3.8 V
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: 1.7 nV/√Hz from 10 kHz to 1 MHz
Low dropout voltage: 200 mV typical at VOUT = 3.3 V, IOUT = 2 A
Maximum output current: 2 A
Input voltage range: 2.3 V to 5.5 V
Low quiescent and shutdown current
Initial accuracy: ±0.6% at ILOAD = 10 mA
Accuracy over line, load, and temperature: ±1.5%
10-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC packages
EVALUATION KIT CONTENTS
12953-001
ADP7159CP-04-EVALZ or ADP7159RD-04-EVALZ
evaluation board
Figure 1. ADP7159CP-04-EVALZ (10-Lead LFCSP)
Printed Circuit Board (PCB) Layout
ADDITIONAL EQUIPMENT NEEDED
A dc power supply
Multimeters for voltage and current measurements
Electronic or resistive loads
GENERAL DESCRIPTION
The ADP7159CP-04-EVALZ and ADP7159RD-04-EVALZ
evaluation boards demonstrate the operation and functionality
of the ADP7159 ultralow noise, 2 A, adjustable output, radio
frequency (RF) linear regulator.
Simple device measurements such as line and load regulation,
dropout voltage, and ground current, can be demonstrated
using only a single voltage supply, load resistors, and a
voltmeter or an ammeter.
12953-002
Complete specifications for the ADP7159 ultralow noise, 2 A,
adjustable output, radio frequency (RF) linear regulator are
available in the ADP7159 data sheet available from Analog
Devices, Inc., and should be consulted in conjunction with this
user guide when using the evaluation boards.
Figure 2. ADP7159RD-04-EVALZ (8-Lead SOIC) PCB Layout
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. 0 | Page 1 of 9
UG-811
EVAL-ADP7159 User Guide
TABLE OF CONTENTS
Features........................................................................................... 1
Line Regulation Measurements................................................ 6
Evaluation Kit Contents ................................................................ 1
Load Regulation Measurements............................................... 6
Additional Equipment Needed..................................................... 1
Dropout Voltage Measurements............................................... 6
General Description ...................................................................... 1
Ground Current Measurements ............................................... 7
Evaluation Boards.......................................................................... 1
Ground Current Consumption................................................. 8
Revision History ............................................................................ 2
Ordering Information ................................................................... 9
Evaluation Board Hardware.......................................................... 3
Bill of Materials.......................................................................... 9
Evaluation Board Configurations............................................. 3
Output Voltage Measurements ................................................. 5
REVISION HISTORY
3/16—Revision 0: Initial Version
Rev. 0 | Page 2 of 9
EVAL-ADP7159 User Guide
UG-811
EVALUATION BOARD HARDWARE
EVALUATION BOARD CONFIGURATIONS
The ADP7159 evaluation boards come supplied with either the
ADP7159ACPZ-04-R7 or ADP7159ARDZ-04-R7 linear regulator,
depending on the version ordered. The schematics of these
evaluation board configurations are shown in Figure 3 and
Figure 4, and the components installed in the board are shown
in Table 1.
Table 1. ADP7159CP-04-EVALZ and ADP7159RD-04EVALZ Hardware Components
The ADP7159 is available in four models that optimize power
dissipation and PSRR performance as a function of input and
output voltage. See Table 2 for selection guides.
Component
U1
C1
C2
C3
C4
C5
C6, C7
Resistors R1 and R2 set the output voltage. The output voltage
(VOUT) is determined by
R1, R2
JP1
VOUT = 1.2 V × (1 + R1/R2)
Description
ADP7159ACPZ-04-R7 or ADP7159ARDZ-04-R7
Input bypass capacitor (CIN )
VREG bypass capacitor (CREG )
VREF bypass capacitor (CREF)
Bypass capacitor (CBYP)
Output capacitor (COUT)
Optional output capacitors (not installed in the
evaluation board)
Output resistor divider (sets the output voltage)
Jumper (connects the EN pin to the VIN pin for
automatic startup)
Table 2. Model Selection Guide for Input Voltage
Model
ADP7159-01
ADP7159-02
ADP7159-03
ADP7159-04
Adjustable VOUT Range (V)
1.2 to 1.8
1.2 to 2.3
1.2 to 2.9
1.2 to 3.3
V OUT Range (V) for Optimized PSRR
1.2 to 1.8
1.8 to 2.3
2.3 to 2.9
2.9 to 3.3
Rev. 0 | Page 3 of 9
V REG (V)
2.1
2.6
3.2
3.6
V IN Range (V)
2.3 to 5.5
2.8 to 5.5
3.4 to 5.5
3.8 to 5.5
UG-811
EVAL-ADP7159 User Guide
TP1
1
P5
1
2
3
4
5
6
7
8
C1
10µF
JP1
1
ADP7159
TP3
1
2
C4
AGND
1µF
AGND
C2
1µF
R1
AGND
C3
1µF
AGND
TP2
U1
P6
1
9
1
VIN
VOUT
10
2
VIN
VOUT
3
5
EN VOUT_SENSE
4
BYP
8
VREG
7
REF
6
REF_SENSE
EP
PAD
AGND
C5
10µF
C6
DNI1
C7
DNI1
AGND
1
2
3
4
5
6
7
8
280kΩ
R2
160kΩ
AGND
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
P4
P3
P2
P1
12953-003
AGND
1DNI = DO NOT INSTALL. DO NOT INSTALL THIS COMPONENT IN THE EVALUATION BOARD.
Figure 3. ADP7159CP-04-EVALZ Evaluation Board Schematic (10-Lead LFCSP)
TP1
P5
1
1
2
3
4
5
6
7
8
ADP7159
TP3
C1
10µF
1
AGND
JP1
8
1
2
4
C4
3
1µF
7
AGND
6
5
C2
1µF
R1
AGND
VIN
TP2
U1
VOUT
EN VOUT_SENSE
1
2
P6
1
C5
10µF
BYP
AGND
VREG
C6
DNI1
C7
DNI1
1
2
3
4
5
6
7
8
REF
REF_SENSE
EP
PAD
C3
280kΩ
1µF
AGND
AGND
R2
160kΩ
AGND
P1
P3
P2
1
2
3
4
1
2
3
4
P4
1
2
3
4
1
2
3
4
1DNI
= DO NOT INSTALL. DO NOT INSTALL THIS COMPONENT IN THE EVALUATION BOARD.
Figure 4. ADP7159RD-04-EVALZ Evaluation Board Schematic (8-Lead SOIC)
Rev. 0 | Page 4 of 9
12953-104
AGND
EVAL-ADP7159 User Guide
UG-811
OUTPUT VOLTAGE MEASUREMENTS
VOLTMETER
VOLTAGE
SOURCE
3.29999
+
–
+
–
12953-004
LOAD
Figure 5. Output Voltage Measurement Setup, ADP7159CP-04-EVALZ (10-Lead LFCSP)
VOLTMETER
VOLTAGE
SOURCE
3.29999
+
+
–
–
12953-005
LOAD
Figure 6. Output Voltage Measurement Setup, ADP7159RD-04-EVALZ (8-Lead SOIC)
Figure 5 and Figure 6 show the connections to a voltage source and
a voltmeter for basic output voltage accuracy measurements for the
ADP7159CP-04-EVALZ and ADP7159RD-04-EVALZ. Use a
resistor as the load for the regulator. Ensure the resistor has a power
rating that can handle the power dissipated across it. An electronic
load can also be used as an alternative to using a resistor load.
Ensure that the voltage source supplies enough current for the
expected load levels.
The steps on how to connect either the ADP7159CP-04-EVALZ
or ADP7159RD-04-EVALZ to a voltage source and a voltmeter
are as follows:
1.
2.
Connect the negative terminal of the voltage source to one
of the GND pins on the evaluation board.
Connect the positive terminal of the voltage source to the
VIN pin on the evaluation board.
3.
4.
5.
Connect a load between the evaluation board VOUT pin
and one of the GND pins.
Connect the negative terminal of the voltmeter to one of
the GND pins on the evaluation board.
Connect the positive terminal of the voltmeter to the
VOUT pin on the evaluation board.
When these steps are complete, turn on the voltage source. If
the JP1 jumper is inserted (connecting the EN pin to the
VIN pin for automatic startup), the regulator powers up.
If the load current is large, connect the voltmeter as close as
possible to the output capacitor to reduce the effects of voltage drops.
Rev. 0 | Page 5 of 9
UG-811
EVAL-ADP7159 User Guide
LINE REGULATION MEASUREMENTS
3.35
For line regulation measurements, the change in the output of
the regulator is measured when the input is varied. For good
line regulation, the output must maintain a minimal change in
voltage with respect to varying input voltage levels. To ensure
that the device is not in dropout mode during this
measurement, vary VIN between VIN_MIN and VIN_MAX . See Table 2
for selection guides. For example, for the ADP7159-04, VIN can
vary from 3.8 V to 5.5 V. This measurement can be repeated
under different load conditions. The typical line regulation
performance of an ADP7159 with a 3.3 V output is shown in
Figure 7.
3.34
3.34
3.33
VOUT (V)
VOUT (V)
3.30
3.29
3.28
3.27
3.26
3.25
0.1m
1m
10m
100m
1
10
ILOAD (A)
= 0mA
= 10mA
= 100mA
= 600mA
= 1200mA
= 2000mA
Figure 8. Output Voltage (VOUT) vs. Load Current (I LOAD), VOUT = 3.3 V, TA = 25°C,
CIN = COUT = 10 µF
DROPOUT VOLTAGE MEASUREMENTS
3.32
Dropout voltage is defined as the input to output voltage
differential when the input voltage is set to the nominal output
voltage. This definition is only applicable to output voltages
above 2.3 V. Dropout voltage increases with larger loads. Figure 5
and Figure 6 show the configuration for measuring dropout
voltage.
3.31
3.30
3.29
3.28
3.27
4.0
4.2
4.4
4.6
4.8
5.0
5.2
VIN (V)
5.4
5.6
12953-008
3.26
3.25
3.8
3.31
12953-007
ILOAD
ILOAD
ILOAD
ILOAD
ILOAD
ILOAD
3.32
Figure 7. Output Voltage (VOUT) vs. Input Voltage (VIN), VOUT = 3.3 V, TA = 25°C,
CIN = COUT = 10 µF
For more accurate measurements, use a second voltmeter to
monitor the input voltage across the input capacitor. The input
supply voltage may require adjusting for voltage drops, especially if
using large load currents. The typical curve of dropout voltage
measurements over varying load current levels is shown in Figure 9.
LOAD REGULATION MEASUREMENTS
0.25
For load regulation measurements, the output voltage of the
regulator is monitored while the load current is varied. For a good
load regulation, the output must maintain a minimal voltage
change with respect to varying load current levels. Hold the input
voltage constant during this measurement. The load current can
vary from 0 mA to 2 A. The typical load regulation performance of
an ADP7159 with a 3.3 V output for an input voltage of 3.8 V is
shown in Figure 8.
VDROPOUT (V)
0.20
0.15
0.10
0.05
0
10m
100m
1
ILOAD (A)
10
12953-009
3.35
3.33
Figure 9. Dropout Voltage vs. Load Current (I LOAD ), VOUT = 3.3 V, TA = 25°C,
CIN = COUT = 10 µF
Rev. 0 | Page 6 of 9
EVAL-ADP7159 User Guide
UG-811
GROUND CURRENT MEASUREMENTS
VOLTAGE
SOURCE
–
+
LOAD
AMMETER
0.004599
+
12953-010
–
Figure 10. Ground Current Measurement Setup, ADP7159CP-04-EVALZ (10-Lead LFCSP)
VOLTAGE
SOURCE
–
+
LOAD
AMMETER
0.004599
+
12953-011
–
Figure 11. Ground Current Measurement Setup, ADP7159RD-04-EVALZ (8-Lead SOIC)
Figure 10 and Figure 11 show the connections to a voltage
source and an ammeter for ground current measurements for
the ADP7159CP-04-EVALZ and ADP7159RD-04-EVALZ. Use
a resistor as the load for the regulator. Ensure the resistor has a
power rating that can handle the power dissipated across it. An
electronic load can also be used as an alternative to using a resistor
load. Ensure the voltage source supplies enough current for the
expected load levels.
3.
4.
When these steps are complete, turn on the voltage source. If the
JP1 jumper is inserted (connecting the EN pin to the VIN pin
for automatic startup), the regulator powers up.
The steps on how to connect either of the ADP7159CP-04EVALZ and ADP7159RD-04-EVALZ to a voltage source and an
ammeter are as follows:
1.
2.
Connect the negative terminal of the ammeter to the
negative terminal of the voltage source.
Connect a load between the evaluation board VOUT pin
and the negative terminal of the voltage source.
Connect the positive terminal the voltage source to the
VIN pin on the evaluation board.
Connect the positive terminal of the ammeter to one of the
GND pins on the evaluation board.
Rev. 0 | Page 7 of 9
UG-811
EVAL-ADP7159 User Guide
GROUND CURRENT CONSUMPTION
14
13
Ground current measurements can determine how much current
the internal circuits of the regulator consume while the circuits
perform the regulation function. For efficiency, the regulator must
consume as little current as possible. Typically, the regulator uses
the maximum current when supplying the largest load level (2 A).
The typical ground current consumption for various load current
levels at VOUT = 3.3 V and TA = 25°C is shown in Figure 12.
12
11
ILOAD = 2000mA
10
IGND (mA)
9
8
7
6
ILOAD = 1200mA
ILOAD = 600mA
ILOAD = 100mA
5
4
When the device is disabled (EN = GND), the ground current
typically drops to 0.2 µA.
ILOAD = 10mA
ILOAD = 0mA
3
2
0
3.8
4.0
4.2
4.4
4.6
4.8
VIN (V)
5.0
5.2
5.4
5.6
12953-012
1
Figure 12. Ground Current (I GND ) vs. Input Voltage (VIN), VOUT = 3.3 V, TA = 25°C,
CIN = COUT = 10 µF
Rev. 0 | Page 8 of 9
EVAL-ADP7159 User Guide
UG-811
ORDERING INFORMATION
BILL OF MATERIALS
Table 3. ADP7159CP-04-EVALZ (10-Lead LFCSP)
Reference Designator
U1
C1, C5, C61, C71
C2, C4
C3
R1, R2
JP1
Description
ADP7159, IC, ultralow noise, low dropout, linear regulator
Capacitor, MLCC, 10 μF, 10 V, 0805, X5R, 10%
Capacitor, MLCC, 1 μF, 10 V, 0805, X5R, 10%
Capacitor, MLCC, 1 μF, 10 V, 0603, X5R, 10%
Resistor, 1%, 0603 case
Jumper, PLUG, 2-position, single row
VIN, VOUT, GND
Header 0.100, single, straight, two pins
1
Manufacturer
Analog Devices, Inc.
TDK or equivalent
TDK or equivalent
TDK or equivalent
Vishay Dale
Omron Electronics
Inc-EMC Div
Sullins Electronics/3M
Part Number
ADP7159ACPZ-04-R7
C2012X5R1A106K125AB
C2012X5R1A105K/10
C1608X5R1A105K080AC
CRCW0603xxxxF
XG8S-0241
Manufacturer
Analog Devices, Inc.
TDK or equivalent
TDK or equivalent
TDK or equivalent
Vishay Dale
Omron Electronics
Inc-EMC Div
Sullins Electronics/3M
Part Number
ADP7159ARDZ-04-R7
C2012X5R1A106K125AB
C2012X5R1A105K/10
C1608X5R1A105K080AC
CRCW0603xxxxF
XG8S-0241
S1012E-36-ND
Not installed in the evaluation board.
Table 4. ADP7159RD-04-EVALZ (8-Lead SOIC)
Reference Designator
U1
C1, C5, C61, C7
C2, C4
C3
R1, R2
JP1
Description
ADP7159, IC, ultralow noise, low dropout, linear regulator
Capacitor, MLCC, 10 μF, 10 V, 0805, X5R, 10%
Capacitor, MLCC, 1 μF, 10 V, 0805, X5R, 10%
Capacitor, MLCC, 1 μF, 10 V, 0603, X5R, 10%
Resistor, 1%, 0603 case
Jumper, PLUG, 2-position, single row
VIN, VOUT, GND
Header 0.100, single, straight, two pins
1
S1012E-36-ND
Not installed in the evaluation board.
ESD Caution
ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection
circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.
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By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and conditions
set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation Board until you
have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you (“Customer”) and Analog Devices, Inc.
(“ADI”), with its principal place of business at One Technology Way, Norwood, MA 02062, USA. Subject to the terms and conditions of the Agreement, ADI hereby grants to Customer a free, limited, personal,
temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY. Customer understands and agrees that the Evaluation Board is provided
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promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile or reverse engineer chips on the Evaluation Board. Customer shall inform ADI of any
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UG12953-0-3/16(0)
Rev. 0 | Page 9 of 9
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