DATASHEET
ISL68134
Digital Dual Output, 4-Phase Configurable, PWM Controller with Adaptive Voltage
Scaling Bus
The
ISL68134
is a digital dual output, flexible multiphase
(X+Y
≤
4) PWM controller with Adaptive Voltage Scaling (AVSBus)
interface. Either output can be configured to support any desired
phase assignments up to a maximum of four phases across the
two outputs (X+Y). For example, 3+1, 2+2, 2+1, or even a single
output operation as a 4+0 configuration are supported. The
flexible phase arrangement, combined with PMBus and AVSBus
interfaces, allows the device to support any demanding power
supply requirement. The ISL68134 with AVSBus complements
PMBus by providing a common interface that accelerates
point-to-point communication between the controller and the load
to statically and dynamically control processor voltage, thus
delivering a balanced and power efficient solution. AVSBus can be
used exclusively after the device is configured using PMBus. The
ISL68134 uses Intersil’s proprietary linear synthetic digital
current modulation scheme to achieve the industry’s best
combination of transient response and ease of tuning while
addressing the challenges of modern multiphase designs.
Device configuration and telemetry monitoring is accomplished
using Intersil's intuitive PowerNavigator™ GUI. The ISL68134
device supports on-chip nonvolatile memory to store various
configuration settings that are user selectable through pin-strap,
giving system designers increased power density to configure and
deploy multiple configurations. The device supports an automatic
phase add/drop feature to allow maximum efficiency across all
load ranges. Thresholds for automatic phase add/drop are user
programmable using the powerful PowerNavigator GUI.
The ISL68134 supports a comprehensive fault management
system to enable the design of highly reliable systems. From a
multitiered overcurrent protection scheme, to the configurable
power-good and output overvoltage/undervoltage fault
thresholds and temperature monitoring, almost any need is
accommodated.
With minimal external components, easy configuration, robust
fault management, and highly accurate regulation capability,
implementing a high performance multiphase regulator has
never been easier.
FN8817
Rev.1.00
Jun 19, 2017
Features
• PMBus 1.3 and AVSBus compliant
- Telemetry - V
IN
, V
OUT
, I
OUT
, power IN/OUT, temperature,
and various fault status registers
- Individual AVSBus interface enables high speed voltage
changes
• Advanced linear digital modulation scheme
- Zero latency synthetic current control for excellent HF
current balance
- Dual edge modulation for fastest transient response
• Auto phase add/drop for excellent load vs efficiency profile
• Flexible phase configuration
- 4+0, 3+1, 2+2 phase operation
- Operation using less than four phases between two
outputs is also supported
• Diode braking for overshoot reduction
• Differential remote voltage sensing supports ±0.5% closed
loop system accuracy over load, line, and temperature
• Highly accurate current sensing for excellent load line
regulation and accurate OCP
- Supports ISL99227 60A smart power stage
- Supports DCR sense with integrated temperature
compensation
• Comprehensive fault management enables high reliability
systems
- Pulse-by-pulse phase current limiting
- Total output current protection
- Output and input OV/UV
- Open voltage sense detect
- Black box recording capability for faults
• Intuitive configuration using
PowerNavigator
GUI
- NVM to store up to eight configurations
• Pb-free (RoHS compliant)
Applications
• Networking equipment
• Telecom/datacom equipment
• Server/storage equipment
• Point-of-load power supply (Memory, DSP, ASIC, FPGA)
Related Literature
• For a full list of related documents, visit our website
-
ISL68134
product page
FN8817 Rev.1.00
Jun 19, 2017
Page 1 of 50
ISL68134
Table of Contents
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Functional Pin Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Driver, DrMOS and Smart Power Stage Recommendation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Internal Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Typical Application: 2+2 Configuration with ISL99227 SPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Typical Application: 3+1 Configuration with ISL99227 SPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Typical Application: 2+2 Configuration with DCR Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Thermal Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Typical Performance Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PWM Modulation Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PMBus Address Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Phase Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Phase Add and Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Voltage Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Switching Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lossless Input Current and Power Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage Regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power-On Reset (POR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Soft-Start Delay and Ramp Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stored Configuration Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fault Monitoring and Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power-Good Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Voltage Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Current Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Smart Power Stage OC Fault Detect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Monitoring and Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11
11
11
12
12
12
12
13
13
14
14
15
15
15
15
15
16
16
16
16
16
18
18
Layout and Design Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
PMBus Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
PMBus Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
PMBus Command Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
PMBus Use Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
PMBus Data Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
PMBus Command Detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Adaptive Voltage Scaling (AVSBus) Functionality and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
AVSBus Master Send Subframe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
AVSBus Slave Response Subframe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
AVSBus Command Detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
About Intersil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Package Outline Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
FN8817 Rev.1.00
Jun 19, 2017
Page 2 of 50
ISL68134
Ordering Information
PART NUMBER
(Notes
1, 2, 3)
ISL68134IRAZ
ISL68134-31P-EV1Z
NOTES:
1. Add “-T” suffix for 6k unit or “-T7A” suffix for 250 unit tape and reel options. Refer to
TB347
for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials and 100% matte tin
plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free
products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), see the product information page for
ISL68134.
For more information on MSL, see
TB363.
PART
MARKING
ISL68134 IRZ
Evaluation Board
TEMP. RANGE
(°C)
-40 to +85
PACKAGE
(RoHS COMPLIANT)
40 Ld 5x5 TQFN
PKG.
DWG. #
L40.5x5D
TABLE 1. KEY DIFFERENCES BETWEEN FAMILY OF PARTS
PART NUMBER
ISL68137
ISL68134
ISL68127
ISL68124
PHASE CONFIGURATION
OUTPUT X/OUTPUT Y
X+Y
≤
7
X+Y
≤
4
X+Y
≤
7
X+Y
≤
4
SPECIFICATION SUPPORTED
PMBus/AVSBus
PMBus/AVSBus
PMBus
PMBus
PACKAGE
QFN 48 Ld, 6x6mm
TQFN 40 Ld, 5x5mm
QFN 48 Ld, 6x6mm
TQFN 40 Ld, 5x5mm
Pin Configuration
ISL68134
(40 LD TQFN)
TOP VIEW
TMON1
TMON0
RGND0
31
30 CS0
29 CSRTN0
28 CS1
27 CSRTN1
26 CS2
GND
(EPAD)
25 CSRTN2
24 CS3
23 CSRTN3
22 RGND1
21 VSEN1
11
EN0
12
EN1
13
TWARN
14
PG0
15
PG1
16
SCL
17
SDA
18
SALRT
19
CONFIG
20
VINSEN
VSEN0
32
VCCS
36
DNC
DNC
DNC
VCC
35
SA
37
40
PWM0
PWM1
PWM2
PWM3
AVS_CLK
AVS_SDA
AVS_MDA
AVS_VDDIO
DNC
DNC
1
2
3
4
5
6
7
8
9
10
39
38
34
33
FN8817 Rev.1.00
Jun 19, 2017
Page 3 of 50
ISL68134
Functional Pin Descriptions
PIN NUMBER
4, 3, 2, 1
5
6
7
8
9, 10, 38, 39,
40
11
12
13
14
15
16
17
18
19
20
21
22
PIN NAME
Refer to
Table 4 on page 19
for design layout considerations.
DESCRIPTION
PWM[3:0] Pulse width modulation outputs. Connect these pins to the PWM input pins of 3.3V logic compatible Intersil smart power
stages, driver IC(s), or power stages.
AVS_CLK
AVS_SDA
AVSBus clock input pin. Connect to ground if not used.
AVSBus data output pin. Leave open if not used.
AVS_MDA AVSBus data input pin. Connect to ground if not used.
AVS_VDDIO AVSBus reference voltage input pin. Leave open if not used.
DNC
EN0
EN1
TWARN
PG0
PG1
SCL
SDA
SALRT
CONFIG
VINSEN
VSEN1
RGND1
Do not connect any signals to these pins.
Input pin used for enable control of Output 0. Active high. Connect to ground if not used.
Input pin used for enable control of Output 1. Active high. Connect to ground if not used.
Thermal warning flag. This open-drain output will be pulled low in the event of a sensed over-temperature at TMON pins
without disabling the regulators. Maximum pull-up voltage is V
CC
.
Open-drain, power-good indicators for Output 0. Maximum pull-up voltage is V
CC
.
Open-drain, power-good indicators for Output 1. Maximum pull-up voltage is V
CC
.
Serial clock signal pin for SMBus interface. Maximum pull-up voltage is V
CC
.
Serial data signal pin for SMBus interface. Maximum pull-up voltage is V
CC
.
Serial alert signal pin for SMBus interface. Maximum pull-up voltage is V
CC
.
Configuration ID selection pin. See
Table 3 on page 16
for more details.
Input voltage sense pin. Connect to VIN through a resistor divider (typically 40.2k/10k) with a 10nF decoupling capacitor.
Positive differential voltage sense input for Output 1. Connect to positive remote sensing point. Connect to ground if not
used.
Negative differential voltage sense input for Output 1. Connect to negative remote sensing point. Connect to ground if not
used.
23, 25, 27, 29 CSRTN[3:0] The CS and CSRTN pins are current sense inputs to individual phase differential amplifiers. Unused phases should have
their respective current sense inputs grounded. The ISL68134 supports smart power stage, DCR and resistor sensing.
24, 26, 28, 30
CS[3:0] Connection details depend on current sense method chosen.
31
32
33
34
35
36
37
EPAD
RGND0
VSEN0
TMON0
TMON1
VCC
VCCS
SA
GND
Negative differential voltage sense input for Output 0. Connect to negative remote sensing point. Connect to ground if not
used.
Positive differential voltage sense input for Output 0. Connect to positive remote sensing point. Connect to ground if not
used.
Input pin for external temperature measurement at Output 0. Supports diode based temperature sensing as well as smart
power stage sensing. Refer to
“Temperature Compensation” on page 14
for more information.
Input pin for external temperature measurement at Output 1. Supports diode based temperature sensing as well as smart
power stage sensing. Refer to
“Temperature Compensation” on page 14
for more information.
Chip primary bias input. Connect this pin directly to a +3.3V supply with a high quality MLCC bypass capacitor.
Internally generated 1.2V LDO logic supply from VCC. Decouple with 4.7µF or greater MLCC (X5R or better).
PMBus Address selection pin. See
Table 2 on page 12
for more details.
Package pad serves as GND return for all chip functions. Connect directly to system GND plane with multiple thermal vias.
FN8817 Rev.1.00
Jun 19, 2017
Page 4 of 50
ISL68134
Driver, DrMOS, and Smart Power Stage Recommendation
INTERSIL PART
NUMBER
ISL99227
ISL99140
ISL6596
QUIESCENT CURRENT
(mA)
4.85
0.19
0.19
GATE
DRIVE VOLTAGE
(V)
5
5
5
NUMBER OF
DRIVERS
Single
Single
Single
COMMENTS
60A, 5x5 smart power stage
40A, 6x6 DrMOS
Connect ISL6596 VCTRL to 3.3V
Internal Block Diagram
PG0
CS0
CSRTN0
CS1
CSRTN1
CS2
CSRTN2
CS3
CSRTN3
ADC
CYCLE-
CYCLE OCP
CYCLE-
CYCLE OCP
CYCLE-
CYCLE OCP
CYCLE-
CYCLE OCP
CPU
SUMMED
OCP
NVM
VDROOP
CURRENT
AC FB
ISUM1
VSEN0
RGND0
DIGITAL
DUAL EDGE
MODULATOR
OV
VDROOP
Current
AC FB
-
+
-
+
P
H
A
S
E
M
A
N
A
G
E
R
SUMMED
OCP
BLACKBOX
LOOP
MANAGER
EN0
EN1
STATUS
MANAGER
PG1
TWARN
ADC
ADC
ADC
CONFIG
SA
ISUM0
VSA
ADC
PID
PWM0
PWM1
PWM2
PWM3
UV
VSEN1
RGND1
VSA
ADC
PID
OV
-
+
-
+
DIGITAL
DUAL EDGE
MODULATOR
VINSEN
TMON0
TMON1
VCC
LDO
VCCS
ADC
UV
PMBUS
INTERFACE
SCL
SDA
SALRT
AVS_CLK
AVS_MDA
AVS_SDA
AVS_VDDIO
FAULT AND
TELEMETRY
MANAGER
AVSBUS
INTERFACE
FIGURE 1. INTERNAL BLOCK DIAGRAM
FN8817 Rev.1.00
Jun 19, 2017
Page 5 of 50
