DATASHEET
ISL68300
Scalable Single Output Digital PWM Controller with Integrated Driver and
PMBus
The
ISL68300
is a PMBus compliant, single-phase
digital DC/DC controller optimized for use with discrete
MOSFETs.
The ISL68300 implements the Renesas fully digital
ChargeMode™ control modulation scheme, allowing it
to achieve both industry leading performance and ease of
use. 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.
In conjunction with many other Renesas digital
controllers, the ISL68300 is capable of complex
sequencing and fault spreading. The Digital-DC™
(DDC) bus is a single-wire serial bus which provides
high performance inter-device communication without
the need for external sequencers, reducing overall system
costs.
The PMBus interface facilitates device configuration,
provides supply telemetry and detailed fault reporting
including a parametric capture tool (SnapShot). All of
these features are conveniently accessible through the
PowerNavigator™
software tool. Additionally, a wide
array of common configuration options are
independently configurable through use of pin-strap
resistors.
The ISL68300 supports a comprehensive fault
management system, with dedicated hardware support
for cycle-by-cycle overcurrent, overvoltage,
undervoltage, and temperature faults. The configurable
fault response system is capable of latching off or
restarting the output on a fault-by-fault basis. Integrated
LDOs for device and gate driver bias allow for single
supply operation.
A companion device, the ISL68301, has a PWM output,
which can be paired with the Renesas family of Smart
Power power stages or DrMOS devices.
FN8789
Rev.0.00
Jun 7, 2018
Features
• Unique compensation-free design, which is always
stable
• Output voltage range: 0.45V to 5.5V
• Input voltage range: 4.75V to 16V or 4.5V to 5.5V
• 0.5% output voltage accuracy over line, load, and
temperature
• ChargeMode control achieves fast transient response,
reduced output capacitance, and provides output
stability without compensation
• Single-channel output, can be paralleled with up to
eight devices in a single droop-less current sharing
output
• Switching frequency range of 200kHz to 1.0MHz
• Proprietary single-wire DDC serial bus enables
voltage sequencing and fault spreading with other
Renesas digital power ICs
• Cycle-by-cycle inductor peak current protection
• Digital fault protection for output voltage UV/OV,
input voltage UV/OV, and temperature
• Cycle-by-cycle output current measurement with
adjustable gain settings for sensing with high current,
low DCR inductors
• Monitor ADC measures input voltage, input current,
output voltage, internal temperature, and external
temperature
• Nonvolatile memory (NVRAM) for storing operating
parameters and fault events
• PMBus compliant, supports 112 PMBus commands
Applications
• Servers and storage equipment
• Telecom and datacom equipment
• Power supplies (FPGA, ASIC, DSP, memory)
Related Literature
For a full list of related documents, visit our website
•
ISL68300
product page
FN8789 Rev.0.00
Jun 7, 2018
Page 1 of 116
ISL68300
Simplified Application
V
IN
4.75V - 16V
V5
VDD
VG
V
OUT
0.5V – 5.5V
ISL68300
V1P5
VSET/SA
GH
BOOT
SW
GL
SYNC
ISENP
ISENN
Control and
Status
Inter-Device
Communication
PMBus
EN
PG
DDC
ISHARE
SDA
SCL
SALRT
SGND
VSENP
VSENN
TEMP/
TRK
PGND
Figure 1. Wide Range Input and Output Applications
FN8789 Rev.0.00
Jun 7, 2018
Page 2 of 116
ISL68300
Contents
1.
1.1
1.2
1.3
1.4
1.5
2.
2.1
2.2
2.3
2.4
3.
3.1
3.2
3.3
3.4
3.5
3.6
3.7
4.
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
4.10
4.11
4.12
4.13
4.14
4.15
4.16
4.17
4.18
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
6
8
9
9
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11
11
12
12
ISL68300 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Pin-Strap Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start-Up and Shutdown Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internal Bias Regulators and Input Supply Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start-Up Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ton-Delay and Rise Times. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Enable Pin Operation and Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power-Good. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15
17
17
18
19
19
20
Power Management Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Input Voltage Undervoltage and Overvoltage Protections . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Overvoltage and Undervoltage Protections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Prebias Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inductor Current Sensing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diode Emulation Mode (DEM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Overcurrent and Undercurrent Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Overload Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External Temperature Monitoring and Voltage Tracking (XTEMP/TRK) . . . . . . . . . . . . . . . . .
Control Loop Tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SMBus Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Digital-DC Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Phase Spreading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Sequencing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fault Spreading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Active Current Sharing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nonvolatile Memory and Security Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Monitoring Through SMBus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General PowerPAD Design Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21
21
22
23
23
23
24
24
27
27
28
28
28
29
29
29
30
30
FN8789 Rev.0.00
Jun 7, 2018
Page 3 of 116
ISL68300
5.
6.
6.1
6.2
7.
8.
9.
PMBus Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
PMBus Command Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
PMBus Use Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
PMBus Data Formats. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
PMBus Command Detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Package Outline Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
FN8789 Rev.0.00
Jun 7, 2018
Page 4 of 116
ISL68300
1. Overview
1.
1.1
Overview
Block Diagram
SC PGA
VSENP/N
ADC
ASCR
Digital PWM
Modulator
GH
BOOT
PWM and
MOSFET
Driver
Peak Detector
Com parators
ZCD
SW
GL
TMON
Monitor
ADC
Target Voltage
Generato r
TEMP/TRK
MUX
VDD
ISHARE
Cir cui t
ISHARE
ADC
PGA
OSC
ISENP
Curr ent
Synthesizer
SYNC
CLK
GEN
ISENN
PLL
Microcontroller s
and Non-Volatile
Memory
ZCD
DDC
Digital-DC
Inter-Device
Com municati ons
Peak Detector
Com parators
EN
SDA
SCL
I
2
C and SMBus
Serial Interface
PG
SALRT
Pin-Str ap
Detecto r/GPIO
VD
D
LDO s
VSET/SA
V1P5
Figure 2. Block Diagram
FN8789 Rev.0.00
Jun 7, 2018
VG
V5
Page 5 of 116
