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ADP7185-3.3-EVALZ

P1-P3P4-P6P7-P9
ADP7183-EVALZ/ADP7185-EVALZ User Guide
UG-795
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 ADP7183 and ADP7185 Ultralow Noise, High PSRR, Low Dropout
Linear Regulators
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. A | Page 1 of 9
FEATURES
Input voltage range: −2.0 V to −5.5 V
Output current range
ADP7183: 0 mA to −300 mA
ADP7185: 0 mA to −500 mA
Output voltage accuracy
ADP7183: ±2.6%
ADP7185: ±2.2%
Operating temperature range: −40°C to +125°C
Adjustable option voltage set with two external resistors
(R1 and R2), V
OUT
= −0.5 V × (1 + R1/R2)
GENERAL DESCRIPTION
The ADP7183 and ADP7185 evaluation boards demonstrate
the functionality of the ADP7183 and ADP7185 series of linear
regulators.
Simple device measurements such as line and load regulation,
dropout voltage, and ground current can be demonstrated with
only a single voltage supply, a voltmeter, an ammeter, and load
resistors.
For full details on the ADP7183 and ADP7185 linear regulators,
see ADP7183 and ADP7185 data sheet, which must be con-
sulted in conjunction with this user guide when using these
evaluation boards.
ADP7183 AND ADP7185 EVALUATION BOARDS
12921-001
Figure 1. ADP7183 and ADP7185 Fixed V
OUT
Board
12921-002
Figure 2. ADP7183 and ADP7185 Adjustable V
OUT
Board
UG-795 ADP7183-EVALZ/ADP7185-EVALZ User Guide
Rev. A | Page 2 of 9
TABLE OF CONTENTS
Features .............................................................................................. 1
General Description ......................................................................... 1
ADP7183 and ADP7185 Evaluation Boards ................................. 1
Revision History ............................................................................... 2
Evaluation Board Hardware ............................................................ 3
Evaluation Board Configurations .............................................. 3
Voltage, Regulation, and Current Mesurements .......................... 4
Output Voltage Measurements ................................................... 4
Dropout Voltage Measurements..................................................4
Line Regulation Measurements ...................................................5
Load Regulation Measurements ..................................................5
Ground Current Measurements ..................................................6
Evaluation Board Schematics and Artwork ...................................7
Ordering Information .......................................................................9
Bill of Materials ..............................................................................9
REVISION HISTORY
5/2017—Rev. 0 to Rev. A
Added ADP7185 ............................................................ Throughout
Changes to Title, Features Section, and General Description .... 1
Changes to Figure 1 and Figure 2 ................................................... 1
Changes to Figure 5, Load Regulation Measurements Section,
and Figure 6 ....................................................................................... 5
Changes to Ground Current Consumption Section and Figure 8 ... 6
Changed Schematics and Silkscreens Section to Evaluation
Board Schematics and Artwork Section ......................................... 7
Changes to Figure 9 and Figure 10 .................................................. 7
Changes to Table 2 ............................................................................. 9
10/2016—Revision 0: Initial Version
ADP7183-EVALZ/ADP7185-EVALZ User Guide UG-795
Rev. A | Page 3 of 9
EVALUATION BOARD HARDWARE
EVALUATION BOARD CONFIGURATIONS
The ADP7183 and ADP7185 evaluation boards are supplied
with different components, depending on which version (fixed or
adjustable) of the evaluation board is ordered. Components
common to both versions are C1, C2, C3, C4, C5, and JP1. The
R1 and R2 resistors set the output voltage of the adjustable
evaluation board. Figure 9 and Figure 10 show the schematics of
these evaluation board configurations, and Table 1 describes the
hardware components.
The ADP7183 and ADP7185 fixed option uses a −3.3 V output
model. Do not connect R1 and R2 for the fixed output option.
The adjustable output of the ADP7183 and ADP7185 has a
range of −0.5 V to −4.5 V. The output voltage is set by
V
OUT
= −0.5 V × (1 + R1/R2)
With the values shown in Figure 10, the output voltage is
approximately −2.5 V.
Table 1. Evaluation Board Hardware Components
Component Description
U1 ADP7183 and ADP7185 linear regulators.
For the fixed output option, U1 uses the −3.3 V output option of the ADP7183 and ADP7185.
For the adjustable output option, U1 uses the adjustable option of the ADP7183 and ADP7185 and is set to −2.5 V.
C1 Input bypass capacitor (C
IN
), 4.7 µF, 0805 size.
C2 Regulator capacitor (C
REG
), 1 µF, 0603 size.
C3 Output voltage reference feedback capacitor (C
AFB
), 0.01 µF, 0603 size.
C4 Low noise reference voltage capacitor (C
A
), 1 µF, 0805 size.
C5 Output capacitor (C
OUT
), 4.7 µF, 0805 size.
JP1 Jumper (connects EN to VIN for automatic startup).
R1, R2 Part of the external resistor divider (composed of R1 and R2 that sets the output voltage for the adjustable option).
P1-P3P4-P6P7-P9

ADP7185-3.3-EVALZ

Mfr. #:
Buy ADP7185-3.3-EVALZ
Manufacturer:
Analog Devices Inc.
Description:
3.3V VOUT EVALUATION BOARD
Lifecycle:
New from this manufacturer.
Delivery:
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