Renesas lSL8273MEVAL1Z, ISL8273M User Manual

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USER’S MANUAL

ISL8273M

VIN

VDD

SDA

SCL

SALRT

VOUT

VSENP

VSENN

SYNC

DDC

5V TO 12V

INTER-DEVICE CONNECTION

(OPTIONAL)

PMBus DONGLE

CONNECTION

(OPTIONAL)

OUT

(CAN BE ADJUSTED

0.6V TO 2.5V)

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™ responds to a transient load within a single switching cycle.

The ISL8273MEVAL1Z evaluation board is a 4.7inx 4.8in 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.

control (ASCR) architecture, which

UG036

Rev 0.00

August 7, 2015

Key Features

•VIN range of 4.5V to 14V, V

•Programmable V limit, OTP/UTP, soft-start/stop, sequencing and

OUT

, margining, input and output UVP/OVP,

OUT

external synchronization

, V

• Monitor: V

OUT

, I

OUT

frequency and faults

•ChargeMode™

control tunable with PMBus

• Mechanical switch for enable and power-good LED indicator

adjustable from 0.6V to 2.5V

OUT

, temperature, duty cycle, switching

Specifications

This board has been configured for the following operating conditions by default:

= 5V to 12V

•V

= 1V

•V

OUT

= 80A

•I

MAX

= 364kHz

•f

• Peak efficiency: >90% at 70% load

• Output ripple: <10mV

P-P

• ASCR gain = 200, ASCR residual = 90

• On/off delay = 5ms; On/off ramp time = 5ms

Ordering Information

References

ISL8273M datasheet

PART NUMBE R DESCRIPTION

ISL8273MEVAL1Z ISL8273M evaluation board, ZLUSBEVAL3Z

FIGURE 1. BLOCK DIAGRAM

adapter, USB cable

UG036 Rev 0.00 Page 1 of 17 August 7, 2015

lSL8273MEVAL1Z

INTERCONNECTS DDC AND SYNC BETWEEN BOARDS

CONNECT TO ZLUSBEVAL3Z DONGLE. FOR MULTIPLE BOARD EVALUATION, CONNECT TO PMBus DONGLE OUT CONNECTION OF OTHER BOARD

INTERCONNECTS DDC

BETWEEN BOARDS

TO DAISY CHAIN PMBus CONNECTION

PGOOD LED

ENABLE SWITCH

VOUT REGULATION MONITOR

AND SYNC

RESISTOR PLACEHOLDERS

FIGURE 2. TOP SIDE

FIGURE 3. BOTTOM SIDE

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lSL8273MEVAL1Z

Recommended Equipment

• DC power supply with minimum 15V/40A sourcing capacity

• Electronic load capable of sinking current up to 80A

• Digital Multimeters (DMMs)

• Oscilloscope with higher than 100MHz bandwidth

Functional Description

The ISL8273MEVAL1Z provides all circuitry required to evaluate the features of the ISL8273M. A majority of the features of the ISL8273M, such as compensation-free ChargeMode™ control, soft-start delay and ramp times, supply sequencing and voltage margining are available on this evaluation board. For sequencing evaluation, the board can be connected to any Intersil digital module evaluation board that supports the DDC bus.

Figures 2

evaluation board.

and 3 show the board images of the ISL8273MEVAL1Z

Quick Start Guide

Pin-strap Option

ISL8273MEVAL1Z can be configured in pin-strap mode with standard 1% 0603 resistors. PMBus interface is not required to evaluate ISL8273M in pin-strap mode. Output voltage (V switching frequency (f input undervoltage protection (UVLO) threshold, ASCR gain and residual, and device PMBus address can be changed by populating recommended resistors at placeholders provided in the evaluation board. By default, the evaluation board operates in pin-strap mode and regulates at V soft-start/stop delay time = 5ms, soft-start/stop ramp time = -5ms to 5ms, UVLO = 4.5V, ASCR gain = 200, ASCR residual = 90 and PMBus address = 28h. Follow these steps to evaluate the ISL8273M in pin-strap mode.

1. Set ENABLE switch to “DISABLE”.

2. Connect Load to VOUT lug connectors (J7-J8 and J9-J10).

3. Connect power supply to VIN connectors (J5 and J6). Make sure power supply is not enabled when making connection.

4. Turn power supply on.

5. Set ENABLE switch to “ENABLE”.

6. Measure 1V V MONITOR” (J11).

7. Observe switching frequency of 364kHz at probe points labeled “PHASE1” (TP10) and “PHASE2” (TP11).

8. To measure the module efficiency, connect the multimeter voltage probes at probe points labeled “VIN” (TP1), “GND” (TP2) and “VOUT” (TP12).

9. To change V populate a 1% standard 0603 resistor at RVSET placeholder location on bottom layer. Refer to the “Output Voltage Resistor Settings” table in the ISL8273M recommended values. By default, VOUT_MAX is set to 110% of V

OUT

10. To change switching frequency, disconnect board from the setup and populate a 1% standard 0603 resistor at the RFSET

OUT,

set by pin-strap resistor.

), soft-start/stop delay and ramp time,

= 1V, fSW = 364kHz,

OUT

at probe point labeled “VOUT REGULATION

OUT

disconnect board from the setup and

datasheet for

OUT

placeholder location on bottom layer. Refer to the “Switching Frequency Resistor Settings” table in the ISL8273M datasheet for recommended values.

11. To change soft-start/stop delay and ramp time, disconnect board from the setup and populate a 1% standard 0603 resistor at R6 placeholder location on bottom layer. Refer to the “Soft Start/Stop Resistor Settings” table in the ISL8273M datasheet for recommended values.

12. To change UVLO, disconnect board from the setup and populate a 1% standard 0603 resistor at the R6 placeholder location on bottom layer. Refer to the “UVLO Resistor Settings” table in the ISL8273M Notice that the UVLO programming shares the same pin with soft-start/stop programming.

13. To change ASCR gain and residual, disconnect board from the setup and populate a 1% standard 0603 resistor at the R7 placeholder location on bottom layer. Refer to the “ASCR Resistor Settings” table and the design guide matrix in the

ISL8273M

datasheet for recommended values.

PMBus Option

ISL8273MEVAL1Z can be evaluated for all features using the provided ZLUSBEVAL3Z dongle and PowerNavigator™ evaluation software. Follow these steps to evaluate theISL8273M with PMBus option.

1. Install PowerNavigator™ software from the following Intersil website: www.intersil.com/powernavigator

2. Set ENABLE switch to “DISABLE”.

3. Connect Load to VOUT lug connectors (J7-J8 and J9-J10).

4. Connect power supply to VIN connectors (J5 and J6). Make sure power supply is not enabled when making connection.

5. Connect the ZLUSBEVAL3Z dongle (USB to PMBus™ adapter) to the ISL8273MEVAL1Z board using the 6-pin male connector labeled “PMBus DONGLE IN”.

6. Turn power supply on.

7. Connect supplied USB cable from computer USB to ZLUSBEVAL3Z dongle.

8. Launch PowerNavigator™ software.

9. It is optional to load a predefined setup from a configuration file using the PowerNavigator™ software. The ISL8273M device on the board operates in pin-strap mode from factory default, but the user may modify the operating parameters through the evaluation software or by loading a predefined set-up from a configuration file. A sample “

on page 7 is provided and can be copied to a notepad editor

to make desired changes. The default pin-strap configurations will be overwritten if a user-defined configuration file is loaded.

10. Set the ENABLE switch to “ENABLE”. Alternatively, the PMBus ON_OFF_CONFIG and OPERATION commands may be used from the PowerNavigator™ software to allow PMBus Enable.

11. Monitor and configure the ISL8273MEVAL1Z board using the PMBus commands in the evaluation software. To store the configuration changes, disable the module and use the command STORE_USER_ALL. To restore factory default

Configuration File”

UG036 Rev 0.00 Page 3 of 17 August 7, 2015

lSL8273MEVAL1Z

VOUT

J16

47k

10m

J15

BSC010NE2LSI

TRANSIENT LOAD

PULSE INPUT

TRANSIENT LOAD

MONITOR



settings, disable the module and use the command RESTORE_FACTORY and STORE_USER_ALL.

12. PowerNavigator™ tutorial videos are available on the Intersil website. www.intersil.com/powernavigator

13. For sequencing via Digital-DC Bus (DDC) or to evaluate multiple Intersil digital power products using a single ZLUSBEVAL3Z dongle, the ISL8273M can be daisy chained with other digital power evaluation boards. The PMBus address can be changed by placing a 1% standard 0603 resistor at the R Refer to the “SMBus Address Resistor Selection” table in the

ISL8273M

placeholder location on the bottom layer.

datasheet for recommended values.

Evaluation Board Information

If input voltage is less than 5.3V, tie the VCC test point directly to VIN or to a separate 5V power supply for best efficiency.

If external synchronization is used, connect the SYNC test point to the external clock. Note that the external clock signal should be active before the module is enabled.

Transient Response Check

OUT

The ISL8273MEVAL1Z board has a built-in transient load test circuit (see the schematic in Figure 4). A 100A N-Channel MOSFET (Manufacturer PN: BSC010NE2LSI) is connected across VOUT and PGND next to the remote voltage sensing location (CVSEN). A 10mΩ current-sense resistor R monitoring the drain-to-source current of the MOSFET. For a transient load test, inject the gate drive pulse signal at J16. The load current can be monitored through J15. Because the MOSFET will operate in the saturation region instead of the linear region when the gate turn-on signal is applied, the pulse width and duty cycle of the gate signal must be limited small enough to avoid MOSFET overheating (recommended duty cycle should be less than 2%). The amplitude of the gate driver pulse voltage can be adjusted to obtain a desired transient load current step size.

FIGURE 4. SCHEMATIC FOR TRANSIENT LOAD MEASUREMENT

is used for

Thermal Considerations and Current Derating

Board layout is very critical in order to make the module operate safely and deliver maximum allowable power. To work in the high temperature environments and carry large currents, the board layout needs to be carefully designed to maximize thermal performance. To achieve this, select enough trace width, copper weight and the proper connectors.

The ISL8273MEVAL1Z evaluation board is designed for running 80A at room temperature without additional cooling systems needed. However, if the output voltage is increased or the board is operated at elevated temperatures, then the available current is derated. Refer to the derated current curves in the ISL8273M datasheet to determine the maximum output current the evaluation board can supply. JA is measured by inserting a thermocouple inside the module to measure peak junction temperature.

PCB Layout Guidelines

The ISL8273MEVAL1Z board layout has been optimized for electrical performance, low loss and good thermal performance.

The key features of the ISL8273MEVAL1Z layout are:

• Large PGND planes and a separate SGND plane. The SGND plane is connected to PGND on the second layer with a single point connection. Multiple vias are used for small pins such as J16, H16, K16, M5, M14, M17 and N5 to connect to inner SGND or PGND layer.

• Ceramic capacitors between VIN and PGND, VOUT and PGND, and bypass capacitors between VDD, VDRV and the ground plane are placed close to the module to minimize high frequency noise. Some output ceramic capacitors are placed close to the VOUT pads in the direction of the load current path to create a low impedance path for the high frequency inductor ripple current.

• Large copper areas are used for power path (VIN, PGND, VOUT) to minimize conduction loss and thermal stress. Multiple vias are used to connect the power planes in different layers.

• Remote sensing traces are connected from the regulation point to VSENP and VSENN pins. The two traces are placed in parallel, to achieve tight output voltage regulation. The regulation point is on the right side of the board in between the VOUT power lugs and the PGND power lugs.

• Multiple vias are used to connect PAD14 and 16 (SW1 and SW2) to inner layers for better thermal performance. The inner layer SW1 and SW2 traces are limited in area and are surrounded by PGND planes to avoid noise coupling. Caution was taken that no sensitive traces, such as the remote sensing traces, were placed close to these noisy planes.

• SWD1 (L3) and SWD2 (P10) pins are connected to SW1 and SW2 pads respectively with short loop wires of 40mil width. The wire width should be at least 20mils.

UG036 Rev 0.00 Page 4 of 17 August 7, 2015

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August 7, 2015

lSL8273MEVAL1Z

ISL8273MEVAL1Z Schematic

FIGURE 5. SCHEMATIC

RELEASED BY:

DRAWN BY:

SHEET

HRDWR ID

DATE:

TESTER

FILENAME:

MASK# REV.

DATE:ENGINEER:

TITLE:

UPDATED BY:

TIM KLEMANN

11/14/2014

ISL8273MEVAL1Z

SCHEMATIC

EVALUATION BOARD

ISL8273M 80A

TAO TAO

TIM KLEMANN

04/21/2015

GND

TO SEQUEL

FROM PREQUELFROM PREQUEL

TO SEQUEL

GND

PGND TIED TO SGND

DISABLE

ENABLE

UNDER DUT

COMMUNICATION CONNECTION INTER-DEVICE CONNECTION

DDC

PHASE1

PHASE2

SALRT

SCL

SDA

SYNC

UVLO

V25

VCC

VI2C

VIN

VMON

VOUT

VR5

VR55

VR6

VSENN

VSENP

4.75K

J15

DNP

TP8

J10

0.1UF

SW1

TP3

3 5

4 6

1 2 3 4 5 6

TP6

3 5

4 6

1 2 3 4 5 6

470UF

R54

0.01

22UF

100UF

C27

SCL SDA SALRT

VIN

PGND

VDRV1

NC VSET

VOUT

VSENP VSENN

VOUT

NC NC PG

ASCR

VDRV

SS/UVLO

MGN

PGND

VCC

V25

VR5

VR6

SWD2

SWD1

SW1

PGND

SW2

PGND

PGND PGND

PGND

VMON SGND SGND SGND SGND SGND

DDC SYNC

PGND

VR55

VDD

ISL8273MAIRZ

PAD6

M14

K16

J16

H16

D13

C10

C11

C12

C13

PAD8

N6 PAD9

N16 PAD11

G15 K14

L14

M13 L2

M10

PAD10

PAD12 R8

M5 R17

M17

N5 E14

D14

G14

F15

E15

PAD15

PAD16

P11

PAD7

PAD4

PAD2

PAD13

PAD14

PAD5

PAD3

PAD1

3 5

4 6

1 2 3 4 5 6

TP5

C23

100UF

DNP

R57

47K

DNP

100UF

C21

DNP

RVSET

21.5K

C16

100UF

10UF

C30

100UF

1.5K

J16

47UF

R12

C12

10UF

22UF

CVSEN

22UF

470UF

C18

470UF

C24

TP2

C13

100UF

TP4

R11

R13

200

R10

10K

RED

GRN

I00000273

47UF

C26

C31

470UF

22UF

100UF

C14

100UF

C28

J11

C17

10UF

470UF

C19

10UF

470UF

C25

TP1

TP12

22UF

C22

100UF

TP9

6.65K

TP11

2N7002L

10UF

C10

C32

470UF

RFSET

17.8K

BSC010NE2LSI

4 5

C29

100UF

100K

TP10

C20

100UF

10UF

C11

1.5K

100UF

C15

TP7

3 5

4 6

1 2 3 4 5 6

lSL8273MEVAL1Z

Bill of Materials

REFERENCE DESIGNATORS QTY MANUFACTURER MANUFACTURER PART DESCRIPTION

C1 1 PANASONIC ECJ-2VB1E104K CAP, SMD, 0805, 0.1µF, 25V, 10%, X7R, ROHS

CVSEN 1 JOHANSON

DIELECTRICS INC

C8, C9, C10, C11, C12, C17 6 VENKEL C1206X7R250-106KNE CAP, SMD, 1206, 10µF, 25V, 10%, X7R, ROHS

C13-C16, C20-C23, C27-C30 12 MURATA GRM31CR60J107ME39L CAP, SMD, 1206, 100µF, 6.3V, 20%, X5R, ROHS

C2, C4, C5, C6 4 MURATA GRM32ER71C226KE18L CAP, SMD, 1210, 22µF, 16V, 10%, X7R, ROHS

C7, C26 2 TDK C3225X5R1C476M CAP, SMD, 1210, 47µF, 16V, 20%, X5R, ROHS

C18, C19, C24, C25, C31, C32 6 SANYO 6TPE470MI CAP-POSCAP, LOW ESR, SMD, D4, 470µF, 6.3V, 20%,

C3 1 PANASONIC EEE-1EA471P CAP, SMD, 10mm, 470µF, 25V, 20%, ALUM.ELEC.,

J5, J6 2 JOHNSON

COMPONENTS

TP1-TP12 12 KEYSTONE 5005 CONN-COMPACT TEST PT, VERTICAL, RED, ROHS

J11, J15, J16 3 BERG/FCI 69190-202HLF CONN-HEADER, 1x2, RETENTIVE, 2.54mm, 0.230x0.120,

J2, J4 2 SAMTEC SSQ-103-02-T-D-RA CONN-SOCKET STRIP, TH, 2x3, 2.54mm, TIN, R/A, ROHS

J1, J3 2 SAMTEC TSW-103-08-T-D-RA CONN-HEADER, 2x3, BRKAWY, 2.54mm, TIN, R/A, ROHS

D1 1 LUMEX SSL-LXA3025IGC-TR LED, SMD, 3x2.5mm, 4P, RED/GREEN, 12/20MCD, 2V

U1 1 INTERSIL ISL8273MAIRZ IC-80A DIGITAL DC/DC MODULE, 42P, HDA, ROHS

Q1 1 ON SEMICONDUCTOR 2N7002LT1G TRANSISTOR-MOS, N-CHANNEL, SMD, SOT23, 60V,

U2 1 INFINEON

TECHNOLOGY

R4-R7 0 RESISTOR, SMD, 0603, 0.1%, MF, DNP-PLACE HOLDER

R11, R12 2 VENKEL CR0603-10W-000T RES, SMD, 0603, 0Ω, 1/10W, TF, ROHS

R10 1 KOA RK73H1JT1002F RES, SMD, 0603, 10k, 1/10W, 1%, TF, ROHS

R1 1 VENKEL CR0603-10W-1003FT RES, SMD, 0603, 100k, 1/10W, 1%, TF, ROHS

R8, R9 2 VENKEL CR0603-10W-1501FT RES, SMD, 0603, 1.5k, 1/10W, 1%, TF, ROHS

RFSET 1 PANASONIC ERJ-3EKF1782V RES, SMD, 0603, 17.8k, 1/10W, 1%, TF, ROHS

R13 1 VENKEL CR0603-10W-2000FT RES, SMD, 0603, 200Ω, 1/10W, 1%, TF, ROHS

RVSET 1 VENKEL CR0603-10W-2152FT RES, SMD, 0603, 21.5k, 1/10W, 1%, TF, ROHS

R57 1 YAGEO RC0603FR-0747KL RES, SMD, 0603, 47k, 1/10W, 1%, TF, ROHS

R3 1 VENKEL CR0603-10W-4751FT RES, SMD, 0603, 4.75k, 1/10W, 1%, TF, ROHS

R2 1 YAGEO RC0603FR-076K65L RES, SMD, 0603, 6.65k, 1/10W, 1%, TF, ROHS

R54 1 VISHAY WSL2512R0100FEA RES-CURR.SENSE, SMD, 2512, 0.01Ω, 1W, 1%, ROHS

SW1 1 C&K COMPONENTS GT13MCBE SWITCH-TOGGLE, THRU-HOLE, 5PIN, SPDT, 3POS, ON-OFF-

J7-J10 4 BERG/FCI KPA8CTP HDWARE,MTG, CABLE TERMINAL,6-14AWG, LUG and

6R3R15X226KV4E CAP, SMD, 0805, 22µF, 6.3V, 10%, X5R, ROHS

18mΩ, ROHS

380mA, ROHS

108-0740-001 CONN-JACK, BANANA-SS-SDRLESS, VERTICAL, ROHS

ROHS

115mA, ROHS

BSC010NE2LSI TRANSIST-MOS, N-CHANNEL, 8P, PG-TDSON-8, 25V, 100A,

ROHS

ON, ROHS

SCREW, ROHS

UG036 Rev 0.00 Page 6 of 17 August 7, 2015

lSL8273MEVAL1Z

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.

RESTORE_FACTORY # reset device to the factory setting STORE_USER_ALL # Clears user memory space # VOUT Related VOUT_COMMAND VOUT_MAX VOUT_MARGIN_HIGH VOUT_MARGIN_LOW VOUT_OV_FAULT_LIMIT VOUT_OV_FAULT_RESPONSE 0x80 # Disable and no retry VOUT_OV_WARN_LIMIT VOUT_UV_WARN_LIMIT VOUT_UV_FAULT_LIMIT VOUT_UV_FAULT_RESPONSE 0x80 # Disable and no retry POWER_GOOD_ON VOUT_TRANSITION_RATE 0xba00 # 1 mV/us VOUT_DROOP 0x0000 # 0 mV/A VOUT_CAL_OFFSET 0x0000 # 0 mV/A # IOUT Related IOUT_CAL_GAIN 0xb370 # 0.86 mV/A IOUT_CAL_OFFSET 0x0000 # 0 A IOUT_OC_FAULT_LIMIT IOUT_UC_FAULT_LIMIT MFR_IOUT_OC_FAULT_RESPONSE 0x80 # Disable and no retry MFR_IOUT_UC_FAULT_RESPONSE 0x80 # Disable and no retry ISENSE_CONFIG # Other Faults OT_FAULT_LIMIT 0xebe8 # 125 °C OT_FAULT_RESPONSE 0x80 # Disable and no retry OT_WARN_LIMIT 0xeb70 # 110 °C UT_WARN_LIMIT 0xdc40 # -30 °C UT_FAULT_LIMIT 0xe530 # -45 °C UT_FAULT_RESPONSE 0x80 # Disable and no retry VIN_OV_FAULT_LIMIT 0xd380 # 14 V VIN_OV_FAULT_RESPONSE 0x80 # Disable and no retry VIN_OV_WARN_LIMIT 0xd353 # 13.3 V VIN_UV_WARN_LIMIT 0xca5d # 4.73 V VIN_UV_FAULT_LIMIT 0xca40 # 4.5 V VIN_UV_FAULT_RESPONSE 0x80 # Disable and no retry #Enable, Timing and Sequence Related ON_OFF_CONFIG 0x16 # Pin Enable, Soft Off TON_DELAY 0xca80 # 5 ms TON_RISE 0xca80 # 5 ms TOFF_DELAY 0xca80 # 5 ms TOFF_FALL 0xca80 # 5 ms POWER_GOOD_DELAY 0xca00 # 4 ms FREQUENCY_SWITCH SYNC_CONFIG 0x00 # Use Pin-strap for FSW setting SEQUENCE 0x0000 # Sequence Disabled # Manufacturer Related MFR_ID Intersil Corp # Example Only MFR_MODEL # Example Only MFR_REVISION Rev-1 # Example Only MFR_LOCATION Milpitas, CA # Example Only MFR_DATE 09/05/2014 # Example Only MFR_SERIAL 1234 # Example Only USER_DATA_00 Module # Example Only # Advance Settings USER_CONFIG 0x80 # ASCR on for Start, Open Drain PG DDC_CONFIG 0x0a01 # DDC rail ID = 10, 2-phase DDC_GROUP 0x00000000 # All Broadcast disabled # Loop Compensation ASCR_CONFIG # ASCR gain = , Residual = STORE_USER_ALL # Store all above settings to NVRAM ### End User Store

UG036 Rev 0.00 Page 7 of 17 August 7, 2015

lSL8273MEVAL1Z

Layout

FIGURE 6. SILKSCREEN TOP

UG036 Rev 0.00 Page 8 of 17 August 7, 2015

FIGURE 7. TOP LAYER COMPONENT SIDE

lSL8273MEVAL1Z

Layout (Continued)

FIGURE 8. LAYER 2

UG036 Rev 0.00 Page 9 of 17 August 7, 2015

FIGURE 9. LAYER 3

lSL8273MEVAL1Z

Layout (Continued)

FIGURE 10. LAYER 4

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FIGURE 11. LAYER 5

lSL8273MEVAL1Z

Layout (Continued)

FIGURE 12. LAYER 6

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FIGURE 13. LAYER 7

lSL8273MEVAL1Z

Layout (Continued)

FIGURE 14. BOTTOM LAYER SOLDER SIDE

UG036 Rev 0.00 Page 12 of 17 August 7, 2015

FIGURE 15. SILKSCREEN BOTTOM

lSL8273MEVAL1Z

0 1020304050607080

ACTUAL OUTPUT CURRENT (A)

READ_IOUT

300kHz

421kHz

533kHz

889kHz

0 1020304050607080

ACTUAL OUTPUT CURRENT (A)

READ_IOUT

0°C

+25°C

+45°C

+65°C

0 1020304050607080

ACTUAL OUTPUT CURRENT (A)

READ_IOUT

471kHz

571kHz

670kHz

889kHz

0 1020304050607080

ACTUAL OUTPUT CURRENT (A)

READ_IOUT

0°C

+25°C

+45°C

+65°C

100

0 1020304050607080

0.8V, 300kHz

1V, 300kHz

1.2V, 300kHz

1.5V, 346kHz

1.8V, 346kHz

2.5V, 530kHz

LOAD CURRENT (A)

EFFICIENCY (%)

300 350 400 450 500 550 600 650 700

0.8V

2.5V

1.2V

1.5V

1.8V

EFFICIENCY (%)

FREQUENCY (kHz)

Typical Performance Data The following data was acquired using a ISL8273MEVAL1Z evaluation board.

FIGURE 16. OUTPUT CURRENT MEASUREMENT ACCURACY AT

= 12V, V

SWITCHING FREQUENCIES

= 1V, TA = +25°C FOR VARIOUS

OUT

FIGURE 18. OUTPUT CURRENT MEASUREMENT ACCURACY AT

= 12V, V

= 2.5V, TA = +25°C FOR VARIOUS

OUT

SWITCHING FREQUENCIES

FIGURE 17. OUTPUT CURRENT MEASUREMENT ACCURACY AT

= 12V, V

AMBIENT TEMPERATURES

= 1V, fSW = 300kHz FOR VARIOUS

OUT

FIGURE 19. OUTPUT CURRENT MEASUREMENT ACCURACY AT

= 12V, V

= 2.5V, fSW = 571kHz FOR VARIOUS

OUT

AMBIENT TEMPERATURES

FIGURE 20. EFFICIENCY vs OUTPUT CURRENT AT V

UG036 Rev 0.00 Page 13 of 17 August 7, 2015

VARIOUS OUTPUT VOLTAGES

= 12V, FOR

FIGURE 21. EFFICIENCY vs SWITCHING FREQUENCY AT V

= 70A FOR VARIOUS OUTPUT VOLTAGES

OUT

= 12V,

lSL8273MEVAL1Z

OUT

(50mV/DIV)

OUT

(20A/DIV)

50µs/DIV

ASCR GAIN = 140

RESIDUAL = 90

ASCR GAIN = 220

RESIDUAL = 90

OUT

(100mV/DIV)

OUT

(20A/DIV)

50µs/DIV

ENABLE

OUT

(500mV/DIV)

POWER GOOD

5ms/DIV

ENABLE

OUT

(500mV/DIV)

POWER GOOD

5ms/DIV

SW1 (10V/DIV)

SW2 (10V/DIV)

OUT

(500mV/DIV)

50µs/DIV

5A/DIV

SW1 (10V/DIV)

SW2 (10V/DIV)

OUT

(500mV/DIV)

50µs/DIV

Typical Performance Data The following data was acquired using a ISL8273MEVAL1Z evaluation board. (Continued)

FIGURE 22. LOAD TRANSIENT RESPONSE AT VIN = 12V, V

= 0A TO 40A (>100A/μs), fSW = 300kHz.

OUT

=14x 100μF CERAMIC + 6 x 470μF POSCAP

OUT

FIGURE 24. SOFT-START AT V

TON_RISE = 5ms, POWER_GOOD_DELAY = 3ms

= 12V, V

= 1V, TON_DELAY = 5ms,

OUT

= 1V,

FIGURE 23. LOAD TRANSIENT RESPONSE AT V

= 0A TO 40A (>100A/μs), fSW = 800kHz.

OUT

=6x 100μF CERAMIC + 3 x 470μF POSCAP

OUT

FIGURE 25. SOFT-STOP AT V

TOFF_FALL = 5ms

= 12V, V

= 1V, TOFF_DELAY = 5ms,

OUT

= 12V, V

OUT

= 2.5V,

FIGURE 26. OUTPUT SHORT-CIRCUIT PROTECTION AT V

UG036 Rev 0.00 Page 14 of 17

= 1V, fSW = 421kHz

OUT

August 7, 2015

= 12V,

FIGURE 27. OUTPUT OVERVOLTAGE PROTECTION AT VIN = 12V,

= 1V, f

OUT

VOUT_OV_FAULT_LIMIT = 1.15V

= 421kHz,

lSL8273MEVAL1Z

SW1 (10V/DIV)

SW2 (10V/DIV)

OUT

(1V/DIV)

50ms/DIV

(5A/DIV)

SW1 (10V/DIV)

SW2 (10V/DIV)

OUT

(1V/DIV)

(5A/DIV)

50ms/DIV

5ms/DIV

VOUT_3 (1V/DIV)

VOUT_2 (1V/DIV)

VOUT_1 (1V/DIV)

ENABLE

MODULE #1:V

OUT

= 1V

MODULE #2:V

OUT

= 1.5V

MODULE #3:V

OUT

= 2.5V

5ms/DIV

VOUT_3 (1V/DIV)

VOUT_2 (1V/DIV)

VOUT_1 (1V/DIV)

ENABLE

MODULE #1:V

OUT

= 1V

MODULE #2:V

OUT

= 1.5V

MODULE #3:V

OUT

= 2.5V

OUT

(200mV/DIV)

5ms/DIV

10V/DIV

SW1 OF MODULE #1

SW2 OF MODULE #1

SW1 OF MODULE #2

SW2 OF MODULE #2

1µs/DIV

Typical Performance Data The following data was acquired using a ISL8273MEVAL1Z evaluation board. (Continued)

FIGURE 28. OUTPUT SHORT-CIRCUIT PROTECTION WITH

CONTINUOUS RETRY ENABLED (HICCUP MODE), V

= 12V, V

OUT

= 1V

FIGURE 30. SOFT-START WITH OUTPUT SEQUENCING AT V

THREE ISL8273MEVAL1Z BOARDS ARE CONNECTED IN DAISY CHAIN

= 12V,

FIGURE 29. OUTPUT SHORT-CIRCUIT RECOVERY FROM CONTINUOUS

RETRY (HICCUP MODE). V

FIGURE 31. SOFT-STOP WITH OUTPUT SEQUENCING AT V

THREE ISL8273MEVAL1Z BOARDS ARE CONNECTED IN

= 12V, V

OUT

= 1V

= 12V,

DAISY CHAIN

FIGURE 32. DYNAMIC VOLTAGE SCALING WITH V

CHANGE FROM 1V TO 1.1V, V VOUT_TRANSITION_RATE = 1mV/µs

UG036 Rev 0.00 Page 15 of 17 August 7, 2015

OUT

= 12V,

FIGURE 33. PHASE SPREADING/INTERLEAVING, TWO

ISL8273MEVAL1Z BOARDS ARE CONNECTED IN DAISY CHAIN, MODULE #1 RAIL POSITION: 0; MODULE #2 RAIL POSITION:4. V VOUT_2 = 1.2V, f

= 12V, VOUT_1 = 1.8V,

= 421kHz

lSL8273MEVAL1Z

Typical Performance Data The following data was acquired using a ISL8273MEVAL1Z evaluation board. (Continued)

FIGURE 34. THERMAL IMAGE AT VIN = 12V, V

= 300kHz, TA = +25°C, NO AIRFLOW

OUT

= 1V, I

OUT

= 80A,

FIGURE 35. THERMAL IMAGE AT V

= 350kHz, TA = +25°C, NO AIRFLOW

= 12V, V

OUT

= 1.8V, I

OUT

= 80A,

UG036 Rev 0.00 Page 16 of 17 August 7, 2015

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(Rev.4.0-1 November 2017)

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Renesas lSL8273MEVAL1Z, ISL8273M User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual