Renesas ISL80410EVAL1Z User Manual
User’s Manual
ISL80410EVAL1Z
User’s Manual: Evaluation Board
Industrial Analog and Power
Rev 0.00 Jan 2018
USER’S MANUAL
,1
287
(1
$'-
*1'
&
,1
&
287
5
N
5
ISL80410EVAL1Z
Evaluation Board
1. Overview
The ISL80410EVAL1Z evaluation board is designed to demonstrate the performance of the ISL80410 high voltage
linear regulator. The evaluation board is available with jumpers to set the output voltage from 2.5V to 12V by
configuring a single resistor. The evaluation board can also be configured to give a specific output voltage.
1.1 Key Features
•Wide V
• Adjustable output voltage from 2.5V to 12V
•I
OUT
• Ultra low 18μA typical quiescent current
• ±1% accurate voltage reference
• Overcurrent protection
• Over-temperature/thermal protection
1.2 Specifications
The board has been configured and optimized for the following operating conditions:
•V
IN
•V
OUT
•I
OUT
• Selectable output by setting jumper pins JP2 through JP8
• JP1 for setting custom output voltage
range of 6V to 40V
IN
is 150mA
= 6V to 40V
= 2.5V to 12V
maximum is 150mA
UG157
Rev.0.00
Jan 18, 2018
1.3 Ordering Information
Part Number Description
ISL80410EVAL1Z 40V Linear Regulator, 150mA evaluation board
1.4 Related Literature
• For a full list of related documents, visit our website
• ISL80410
UG157 Rev.0.00 Page 2 of 11
Jan 18, 2018
product page
Figure 1. ISL80410EVAL1Z Block Diagram
ISL80410EVAL1Z 2. Functional Description
V
OUT
1.223V
R
9
R
1
-------1+
=
(EQ. 1)
R
1
18.3k
V
OUT
1.223–
-------------------------------------=
(EQ. 2)
2. Functional Description
The ISL80410EVAL1Z provides a simple platform to evaluate the performance of the ISL80410, a high input voltage,
low quiescent current linear regulator. The ISL80410 can provide 150mA current with only 18µA typical quiescent
current. The regulator features a wide input voltage range of 6V to 40V. The output voltage is adjustable from 2.5V to
12V through a feedback resistor divider. The ISL80410 is ideal for applications that need the load to operate under
“always-on” or “stay alive” conditions of a high input voltage or under load dump conditions in which the system
voltage may peak much higher than normal. In addition, the low dropout performance and high PSRR make this
regulator a good choice as a post regulator for a noisy voltage bus.
The ISL80410EVAL1Z evaluation board is set up so that the user can easily configure the device for a specific output
voltage with a single jumper. Jumper pins JP4 through JP7 set the output voltage through a discrete range of 2.5V to
12V. When jumper JP1 is set, the user must populate R
The regulator uses a voltage divider to set the feedback reference for setting output voltage. The voltage at the output
of the linear regulator when setting a custom output voltage is defined by Equation 1
at 15kΩ. Rearranging for R
yields Equation 2.
1
with a resistor to get a custom output voltage.
1
. R9 is set on the evaluation board
Table 1. Evaluation Board Output Voltage
V
(V) RSET Jumper Setting
OUT
2.5 14kΩ JP4
3.3 8.66kΩ JP5
5 4.75kΩ JP6
12 1.65kΩ JP7
Custom R
= 18.3kΩ/(V
1
- 1.223V) JP1
OUT
2.1 Quick Start Guide
(1) Set the appropriate jumper for the desired output voltage.
(2) Set jumper JP9, shorting pins 1 and 2, to enable the device.
(3) Connect a supply of +6V to +40V to the VIN and GND terminals.
(4) Connect VOUT to a load or a multimeter to evaluate the output.
UG157 Rev.0.00 Page 3 of 11
Jan 18, 2018
ISL80410EVAL1Z 3. PCB Layout Guidelines
3. PCB Layout Guidelines
Good PCB layout is important to achieve expected performance. Take care 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 ADJ feedback trace should be
away from other noisy traces. Connect the exposed pad to the ground plane using as many vias as possible within the
pad for the best thermal relief.
3.1 ISL80410EVAL1Z Evaluation Board
Figure 2. ISL80410EVAL1Z Evaluation Board (Top)
UG157 Rev.0.00 Page 4 of 11
Jan 18, 2018
Loading...