UG173 Rev.0.00 Page 2 of 22
Jul 12, 2018
UG173
Rev.0.00
Jul 12, 2018
ISL68300EVAL3Z
Evaluation Board
USER’S MANUAL
1. Overview
The ISL68300 is a PMBus compliant, single-phase digital DC/DC controller with integrated gate drivers for use with
N-channel MOSFETs. The ISL68300 implements the Renesas fully digital ChargeMode™ control modulation scheme,
allowing both ease of use and industry leading performance. ChargeMode control provides an inherently stable control
loop that can respond to load transients in a single switching cycle, significantly decreasing output capacitor requirements.
A dedicated current share bus allows for paralleling up to eight devices in a current share configuration, allowing
support for a wide range of load currents.
The ISL68300EVAL3Z evaluation board is a 2.7inx3.0in 6-layer FR4 board with 2oz. copper on all layers. This
evaluation board comes with a placeholder for pin-strap resistors to adjust output voltage, switching frequency, and the
device PMBus address. More configurations, such as soft-start and fault limits, can be easily programmed or changed
using a PMBus compliant serial bus interface.
This evaluation board includes the ZLUSBEVAL3Z (USB to PMBus adapter), 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.
1.1 Key Features
•V
IN range of 4.5V to 16V, VOUT adjustable from 0.5V to 2.5V
• Programmable VOUT, margining, UV/OV, IOUT limit, soft-start/stop, sequencing, and external synchronization
• Monitor: VIN, VOUT, IOUT, temperature, duty cycle, switching frequency, and faults
• ChargeMode control tunable with PMBus
• On-board load step circuit
• Mechanical switch for enable and power-good LED indicator
1.2 Specifications
This board highlights the current-sharing feature of the ISL68300 in the 2-phase configuration. It is configured for
the following operating conditions by default:
•V
IN = 7V to 16V
•V
OUT = 1.0V
•I
MAX = 60A
•f
SW = 400kHz
• Peak efficiency: >89% at 50% load
• On/off delay = 5ms, on/off ramp time = 5ms
1.3 Ordering Information
1.4 Related Literature
For a full list of related documents, visit our website
•ISL68300 product page
Part Number Description
ISL68300EVAL3Z ISL68300 evaluation board (EVB, ZLUSBEVAL3Z adapter, USB cable)
