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ISL9123xIIx-EVZ
The ISL9123xIIx-EVZ platform allows quick
evaluation of the high-performance features of the
ISL9123,
ISL9123A, and
The ISL9123 is a highly integrated buck switching
regulator that accepts input voltages above the
regulated output voltage. It features a remarkably low
quiescent current consumption, excellent efficiency,
2
and an I
C interface that allows access its internal
registers for output voltage and operation mode
control.
VIN
GND
R16UZ0031EU0101 Rev.1.01
Jul 26, 2023
ISL9123B
buck regulator.
VIN
EN
SDA
SCL
2
I
C
Figure 1. ISL9123xIIx-EVZ Block Diagram
Evaluation Board Manual
Features
▪ Small, compact design
2
▪ I
C interface for programmable V
various operation modes (Forced Bypass
(ISL9123/A only), Auto-PFM, Forced PWM)
▪ Connectors, test points, and jumpers for easy
probing
Specifications
The board operates with the following conditions:
▪ Input voltage rating from 1.8V to 5.5V
▪ Programmable output voltage range of 0.4V to
5.375V (ISL9123/A), and to 1.180V (ISL9123B),
and selectable transition slew rate through I
interface
▪ Up to 600mA output current (VIN > 2.5V)
▪ Operating temperature range: -40°C to +85°C
LX
VOUT
VSW
GND
, slew rate and
OUT
VOUT
GND
VSW
© 2022-2023 Renesas Electronics
2
C
Page 1

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Summary of Contents for Renesas ISL9123xIIx-EVZ

  • Page 1 Evaluation Board Manual ISL9123xIIx-EVZ Features The ISL9123xIIx-EVZ platform allows quick evaluation of the high-performance features of the ▪ Small, compact design ISL9123, ISL9123A, and ISL9123B buck regulator. ▪ I C interface for programmable V , slew rate and The ISL9123 is a highly integrated buck switching...
  • Page 2: Table Of Contents

    ISL9123xIIx-EVZ (WLCSP) ........
  • Page 3: Functional Description

    ISL9123xIIx-EVZ Evaluation Board Manual Functional Description The evaluation board (EVB) provides a simple platform to evaluate the feature-rich ISL9123/A/B buck regulator. The board regulates to the device default output voltage after start-up. The output voltage can be programmed by C. Each evaluation board is optimized to perform best with the ISL9123/A/B IC series. The input power and load connections are provided through multi-pin connectors for high-current operations.
  • Page 4 ISL9123xIIx-EVZ Evaluation Board Manual Therefore, depending on the performance specifications of the capacitor, an additional output capacitor might be required for higher output voltage settings. 6. Monitor the output voltage start-up sequence on the scope. The waveforms should look similar to those shown Figure 7.
  • Page 5: Evaluation Software Installation And Use

    ISL9123xIIx-EVZ Evaluation Board Manual Evaluation Software Installation and Use The ISL9123 evaluation software and evaluation software manual are available for download from the Renesas website. 1. Save the evaluation software executable file and install the evaluation software (see the evaluation software manual).
  • Page 6 ISL9123xIIx-EVZ Evaluation Board Manual Figure 4. ISL9123 Evaluation Software Window Figure 5. ISL9123A Evaluation Software Window R16UZ0031EU0101 Rev.1.01 Page 6 Jul 26, 2023...
  • Page 7 ISL9123xIIx-EVZ Evaluation Board Manual Figure 6. ISL9123B Evaluation Software Window R16UZ0031EU0101 Rev.1.01 Page 7 Jul 26, 2023...
  • Page 8: Board Design

    ISL9123xIIx-EVZ Evaluation Board Manual Board Design ISL9123xIIx-EVZ (WLCSP) 2.1.1 Board Image Figure 7. ISL9123xIIx-EVZ Evaluation Board (Top) R16UZ0031EU0101 Rev.1.01 Page 8 Jul 26, 2023...
  • Page 9: Circuit Schematic

    ISL9123xIIx-EVZ Evaluation Board Manual 2.1.2 Circuit Schematic Figure 8. ISL9123xIIx-EVZ Circuit Schematic 2.1.3 Bill of Materials Reference Manufacturer Part Description Manufacturer Designator Number CAP, SMD, 1210, 47µF, 16V, 20%, ROHS GRM32ER61C476ME15 Murata CAP, SMD, 0603, 10µF, 6.3V, 20%, X5R, ROHS...
  • Page 10: Board Layout

    2. All related WLCSP packaged device(s) use the same printed circuit board design (ISL9123IIN-EVZ), with an appropriate silk screen or label according to the unique orderable evaluation board part number. 2.1.4 Board Layout Figure 9. ISL9123xIIx-EVZ Top Layer Silk Screen R16UZ0031EU0101 Rev.1.01 Page 10 Jul 26, 2023...
  • Page 11 ISL9123xIIx-EVZ Evaluation Board Manual Figure 10. ISL9123xIIx-EVZ Inner Layer 2 Figure 11. ISL9123xIIx-EVZ Inner Layer 3 R16UZ0031EU0101 Rev.1.01 Page 11 Jul 26, 2023...
  • Page 12 ISL9123xIIx-EVZ Evaluation Board Manual Figure 12. ISL9123xIIx-EVZ Bottom Layer Silk Screen R16UZ0031EU0101 Rev.1.01 Page 12 Jul 26, 2023...
  • Page 13: Layout Guidelines

    ISL9123xIIx-EVZ Evaluation Board Manual Layout Guidelines The evaluation board PCB layout is optimized for electrical and thermal performance. ▪ Position the input and output capacitors as close to the IC as possible. The input currents are discontinuous in a buck converter; therefore, it is important to place the input capacitors as close as possible.
  • Page 14 Renesas' products are provided only subject to Renesas' Terms and Conditions of Sale or other applicable terms agreed to in writing. No use o any Renesas resources expands or otherwise alters any applicable warranties or warranty disclaimers for these products.

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