Renesas lSL8273MEVAL1Z User Manual
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Renesas lSL8273MEVAL1Z User Manual

Renesas lSL8273MEVAL1Z User Manual

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lSL8273MEVAL1Z

Evaluation Board

Description
The
ISL8273M
is a 80A step-down DC/DC power supply
module with an integrated digital PWM controller, dual-phase
synchronous power switches, inductors and passives. Only
input/output capacitors and minimal passives are needed to
finish the design. 80A of continuous output current can be
delivered without a need of airflow or heatsink. The ISL8273M
uses ChargeMode™ control (ASCR) architecture, which
responds to a transient load within a single switching cycle.
The ISL8273MEVAL1Z evaluation board is a 4.7inx4.8in
8-layer FR4 board with 2oz. copper on all layers. This
evaluation board comes with placeholders for pin-strap
resistor population to adjust output voltage, switching
frequency, soft-start/stop timing and input UVLO threshold,
ASCR gain and residual parameters and device PMBus™
address. More configurations, such as sequencing, Digital-DC™
(DDC) bus configuration and fault limits can be easily
programmed or changed via PMBus compliant serial bus
interface.
The optional ZLUSBEVAL3Z (USB to PMBus adapter) is
provided with this evaluation board, which connects the
evaluation board to a PC to activate the PMBus
communication interface. The PMBus command set is
accessed by using the PowerNavigator™ evaluation software
from a PC running Microsoft Windows. The ISL8273MEVAL1Z
can operate in pin-strap mode without needing the
ZLUSBEVAL3Z adapter or PMBus communication.
References
ISL8273M
datasheet
PMBus DONGLE
UG036 Rev 0.00
August 7, 2015
V
IN
5V TO 12V
VIN
VDD
EN
PG
SDA
SCL
CONNECTION
(OPTIONAL)
SALRT
FIGURE 1. BLOCK DIAGRAM

Key Features

• V
range of 4.5V to 14V, V
IN
• Programmable V
I
limit, OTP/UTP, soft-start/stop, sequencing and
OUT
external synchronization
• Monitor: V
, V
IN
OUT
frequency and faults
• ChargeMode™ control tunable with PMBus
• Mechanical switch for enable and power-good LED indicator

Specifications

This board has been configured for the following operating
conditions by default:
• V
= 5V to 12V
IN
• V
= 1V
OUT
• I
= 80A
MAX
• f
= 364kHz
SW
• Peak efficiency: >90% at 70% load
• Output ripple: <10mV
• ASCR gain = 200, ASCR residual = 90
• On/off delay = 5ms; On/off ramp time = 5ms

Ordering Information

PART NUMBER
ISL8273MEVAL1Z
INTER-DEVICE CONNECTION
(OPTIONAL)
VOUT
ISL8273M
VSENP
VSENN
USER'S MANUAL
August 7, 2015
adjustable from 0.6V to 2.5V
OUT
, margining, input and output UVP/OVP,
OUT
, I
, temperature, duty cycle, switching
OUT
P-P
DESCRIPTION
ISL8273M evaluation board, ZLUSBEVAL3Z
adapter, USB cable
V
1V
OUT
(CAN BE ADJUSTED
0.6V TO 2.5V)
Page 1 of 17
UG036
Rev 0.00

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Summary of Contents for Renesas lSL8273MEVAL1Z

  • Page 1: Evaluation Board

    USER’S MANUAL lSL8273MEVAL1Z UG036 Evaluation Board Rev 0.00 August 7, 2015 Description Key Features ISL8273M is a 80A step-down DC/DC power supply • V range of 4.5V to 14V, V adjustable from 0.6V to 2.5V module with an integrated digital PWM controller, dual-phase •...
  • Page 2 PGOOD LED INTERCONNECTS DDC INTERCONNECTS DDC AND AND SYNC ENABLE SWITCH SYNC BETWEEN BOARDS BETWEEN BOARDS TO DAISY CHAIN PMBus CONNECTION CONNECT TO ZLUSBEVAL3Z DONGLE. FOR MULTIPLE BOARD EVALUATION, CONNECT TO PMBus DONGLE OUT CONNECTION OF OTHER BOARD VOUT REGULATION MONITOR FIGURE 2.

  • Page 3: Recommended Equipment

    Recommended Equipment placeholder location on bottom layer. Refer to the “Switching Frequency Resistor Settings” table in the ISL8273M • DC power supply with minimum 15V/40A sourcing capacity datasheet for recommended values. 11. To change soft-start/stop delay and ramp time, disconnect •...

  • Page 4: Pcb Layout Guidelines

    Thermal Considerations and settings, disable the module and use the command RESTORE_FACTORY and STORE_USER_ALL. Current Derating 12. PowerNavigator™ tutorial videos are available on the Intersil website. www.intersil.com/powernavigator Board layout is very critical in order to make the module operate safely and deliver maximum allowable power.
  • Page 5 ISL8273MEVAL1Z Schematic FROM PREQUEL FROM PREQUEL SALRT SYNC VI2C TO SEQUEL TO SEQUEL ENABLE DISABLE COMMUNICATION CONNECTION INTER-DEVICE CONNECTION VOUT PHASE1 TP10 TP12 VSENP PAD1 SALRT VOUT PAD3 SALRT PGND PAD5 PGND SYNC SWD1 PAD14 4.75K ISL8273MAIRZ SYNC PAD13 PGND VSENP VSENN VSET...

  • Page 6: Bill Of Materials

    Bill of Materials REFERENCE DESIGNATORS MANUFACTURER MANUFACTURER PART DESCRIPTION PANASONIC ECJ-2VB1E104K CAP, SMD, 0805, 0.1µF, 25V, 10%, X7R, ROHS CVSEN JOHANSON 6R3R15X226KV4E CAP, SMD, 0805, 22µF, 6.3V, 10%, X5R, ROHS DIELECTRICS INC C8, C9, C10, C11, C12, C17 VENKEL C1206X7R250-106KNE CAP, SMD, 1206, 10µF, 25V, 10%, X7R, ROHS...

  • Page 7: Configuration File

    Configuration File Sample Configuration File for ISL8273M Module. Copy and paste (from RESTORE_FACTORY TO ### End User Store) to a notepad and save it as Confile_file_name.txt. The # symbol is used for a comment line. Following settings are already loaded to ISL8273M module as factory defaults.
  • Page 8 Layout FIGURE 6. SILKSCREEN TOP FIGURE 7. TOP LAYER COMPONENT SIDE UG036 Rev 0.00 Page 8 of 17 August 7, 2015...
  • Page 9 Layout (Continued) FIGURE 8. LAYER 2 FIGURE 9. LAYER 3 UG036 Rev 0.00 Page 9 of 17 August 7, 2015...
  • Page 10 Layout (Continued) FIGURE 10. LAYER 4 FIGURE 11. LAYER 5 UG036 Rev 0.00 Page 10 of 17 August 7, 2015...
  • Page 11 Layout (Continued) FIGURE 12. LAYER 6 FIGURE 13. LAYER 7 UG036 Rev 0.00 Page 11 of 17 August 7, 2015...
  • Page 12 Layout (Continued) FIGURE 14. BOTTOM LAYER SOLDER SIDE FIGURE 15. SILKSCREEN BOTTOM UG036 Rev 0.00 Page 12 of 17 August 7, 2015...

  • Page 13: Typical Performance Data

    Typical Performance Data The following data was acquired using a ISL8273MEVAL1Z evaluation board. 421kHz +25°C 533kHz +65°C 300kHz 889kHz +45°C 0°C ACTUAL OUTPUT CURRENT (A) ACTUAL OUTPUT CURRENT (A) FIGURE 16. OUTPUT CURRENT MEASUREMENT ACCURACY AT FIGURE 17. OUTPUT CURRENT MEASUREMENT ACCURACY AT...
  • Page 14 Typical Performance Data The following data was acquired using a ISL8273MEVAL1Z evaluation board. (Continued) ASCR GAIN = 140 ASCR GAIN = 220 RESIDUAL = 90 RESIDUAL = 90 (50mV/DIV) (100mV/DIV) (20A/DIV) (20A/DIV) 50µs/DIV 50µs/DIV FIGURE 22. LOAD TRANSIENT RESPONSE AT V...
  • Page 15 Typical Performance Data The following data was acquired using a ISL8273MEVAL1Z evaluation board. (Continued) SW1 (10V/DIV) SW1 (10V/DIV) SW2 (10V/DIV) SW2 (10V/DIV) (1V/DIV) (1V/DIV) (5A/DIV) (5A/DIV) 50ms/DIV 50ms/DIV FIGURE 28. OUTPUT SHORT-CIRCUIT PROTECTION WITH FIGURE 29. OUTPUT SHORT-CIRCUIT RECOVERY FROM CONTINUOUS CONTINUOUS RETRY ENABLED (HICCUP MODE), RETRY (HICCUP MODE).
  • Page 16 Typical Performance Data The following data was acquired using a ISL8273MEVAL1Z evaluation board. (Continued) FIGURE 34. THERMAL IMAGE AT V = 12V, V = 1V, I = 80A, FIGURE 35. THERMAL IMAGE AT V = 12V, V = 1.8V, I...

  • Page 17: Sales Offices

    10. It is the responsibility of the buyer or distributor of Renesas Electronics products, or any other party who distributes, disposes of, or otherwise sells or transfers the product to a third party, to notify such third party in advance of the contents and conditions set forth in this document.

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