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ISL80510EVAL1Z Evaluation Board User Guide
Description
The ISL80510EVAL1Z provides a simple platform to evaluate
performances of the ISL80510
and ISL80505. It comes with
jumpers to provide an easy way to set popular output voltages.
The ISL80510 is a high performance, low voltage, high current,
low dropout linear regulator specified at 1A. Rated for input
voltages from 2.2V to 6V, the LDO can provide output voltages
from 0.8V to 5.5V.
Specifications
This board has been configured and optimized for the following
operating conditions:
•V
IN
= 2.2 to 6V (ISL80510), 1.8V to 6V (ISL80505)
•V
OUT
= 1V, 1.2V, 1.8V, 2.5V, 3.3V, or 5V (Jumper selectable)
•I
MAX
= 1A (ISL80510), 500mA (ISL80505)
Key Features
•Small, compact design
•V
IN
range of 2.2V to 6V (ISL80510), 1.8V to 6V (ISL80505)
•V
OUT
adjustable from 0.8V to 5.5V
• Convenient power connection
References
ISL80510 datasheet
ISL80505
datasheet
Ordering Information
PART NUMBER DESCRIPTION
ISL80510EVAL1Z ISL80510 evaluation board
FIGURE 1. ISL80510EVAL1Z BLOCK DIAGRAM
V
IN
VOUT
ISL80510/ISL80505
C
SS
C
OUT
10nF
C
IN
R
1
R
2
2
3
4
1
5
8
7
6
V
OUT
FB
GND
V
IN
V
IN
ENABLE
SS
EPAD
V
OUT
C
PB
10µF
10µF
10nF
GND
2.61kΩ
NOTE: The ISL80505 is another high performance, low dropout linear regulator specified at 500mA in the same family as ISL80510. The
ISL80505 is rated for input voltage from 1.8V to 6V and can provide output voltages from 0.8V to 5.5V. The ISL80505 is pin-to-pin compatible
with ISL80510 and can simply replace ISL80510 on ISL80510EVAL1Z for evaluation. (For ISL80505 samples, please contact Intersil.)
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
| Copyright Intersil Americas LLC 2015. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
September 3, 2015
UG044.0
User Guide 044
User Guide 044
UG044.0
September 3, 2015
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Functional Description
The ISL80510EVAL1Z evaluation board provides a simple
platform to demonstrate the features of the ISL80510 and
ISL80505. The ISL80510EVAL1Z has a functionally optimized
ISL80510/ISL80505 circuit layout that allows efficient operation
up to the maximum output current.
The ISL80510EVAL1Z evaluation board is shown in Figures 2
and
3
. The “ISL80510EVAL1Z Circuit Schematic” on page 4 shows
the schematic, bill of materials and PCB layers for reference.
Figure 7 through 16 show performance data taken using this
hardware.
Operating Range
The board V
IN
range is 2.2V to 6V (ISL80510) or 1.8V to 6V
(ISL80505). The board V
OUT
setting is set to 1.8V out of the box.
The output voltage can be set be an external resistor divider
network. The values of resistors R
1
and R
2
can be calculated by
using Equation 1.
The output voltage can be easily changed to different voltage
setting by jumpers from J1 through J6. Table 1
lists the output
voltage options included in the ISL80510EVAL along with the
corresponding jumper.
PCB Layout Guidelines
A good PCB layout is important to achieve expected
performance. Consideration should be taken when placing the
components and routing the trace to minimize the ground
impedance, and keep the parasitic inductance low. The input and
output capacitors should have a good ground connection and be
placed as close to the IC as possible. The ‘FB’ trace must be away
from noisy planes and traces.
The large 2x3 via pattern under the ISL80510/ISL80505 is
connected to a large ground copper plane on the bottom layer for
effective thermal dissipation.
Quick Start Guide
1. Select the desired output voltage by shorting one of the
jumpers from J1 through J6.
2. Connect the input supply to VIN and GND.
3. Connect the load to VOUT and GND.
4. Enable the IC using jumper JP1 and observe the output.
TABLE 1.
V
OUT
(V)
R
1
(kΩ)
R
2
(kΩ)JUMPER
1.0 2.61 2.61 J1
1.2 2.61 1.87 J2
1.8 2.61 1.00 J3
2.5 2.61 0.649 J4
3.3 2.61 0.464 J5
5.0 2.61 0.287 J6
R
1
R
2
V
OUT
0.5
----------------
1–
=
(EQ. 1)