19-4807; Rev 1; 2/10
±0.3% Accurate, Quad, Power-Supply Controller with
Active-Voltage Output Control and PMBus Interface
General Description
The MAX16064 is a fully integrated 4-channel digital
power-supply controller and monitor IC that can be con-
nected up to four power supplies to provide complete
digital configurability. By interfacing to the power-supply
reference input or feedback node, and the output enable,
the MAX16064 takes control of the power supply to pro-
vide tracking, soft-start, sequencing, margining, and
dynamic adjustment of the output voltage.
Power-supply sequencing can be performed
autonomously or controlled over the PMBus™ interface.
Sequencing is controlled during power-down as well as
power-up. Multiple MAX16064s can be combined to
autonomously sequence more supplies. The sequencing
order is stored in an external configuration EEPROM so
sequence order changes can be reprogrammed without
changing the PCB layout.
The MAX16064 features an internal temperature sensor
providing an additional level of system monitoring.
Other features include a reset output and an SMBus™
alert output.
Each channel of the MAX16064 includes an accurate
12-bit analog-to-digital converter (ADC) input and a differen-
tial amplifier for accurately monitoring and reporting the volt-
age at the load without being influenced by any difference in
ground potentials. An integrated 12-bit digital-to-analog con-
verter (DAC) can margin power supplies and dynamically
adjust the output voltage using a closed-loop control system
to provide an output-voltage accuracy of ±0.3%.
The user-programmable registers provide flexible and
accurate control of time events such as delay time and
transition period, monitoring for overvoltage and under-
voltage, overtemperature fault and warning handling.
The closed-loop operation is also programmable to make
sure the MAX16064 works with any existing power sup-
ply to provide superior regulation accuracy and accurate
margining.
The MAX16064 operates using a PMBus-compliant com-
munication protocol. The device can be programmed
using this protocol or with a free graphic-user interface
(GUI) available from the Maxim website that significantly
reduces development time. Once the configuration is
complete, the results can be saved into an EEPROM or
loaded into the device through PMBus at power-up. This
allows remote configuration of any power supply using
the MAX16064, replacing expensive recalls or field ser-
vice. The MAX16064 can be programmed with up to 114
distinct addresses to support large systems. The
MAX16064 is offered in a space-saving, 36-pin, lead-free,
6mm x 6mm TQFN package and is fully specified from
-40°C to +85°C.
Features
♦
Accurate Voltage Output Control (AVOC) Controls
Output Voltage with ±0.3% Accuracy
♦
PMBus Interface for Programming, Monitoring,
Sequencing Up and Down, and Margining
♦
Output Voltage and Temperature Monitoring with
Adjustable Monitor Rate
♦
Programmable Soft-Start and Soft-Stop Ramp
Rates
♦
Power-Supply Control using REFIN or FB
Terminals
♦
Master-Slave Clocking Option Provides Accurate
Timing Reference Across Multiple Devices
♦
External EEPROM Interface for Autoboot on
Power-Up
♦
3.0V to 3.6V Operating Voltage Range
♦
6mm x 6mm, 36-Pin TQFN Package
MAX16064
Applications
Routers
Servers
Storage Systems
Telecom/Networking
DC-DC Modules and Power Supplies
Ordering Information
PART
MAX16064ETX+
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
36 TQFN-EP*
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*EP
= Exposed pad.
Pin Configuration and Typical Operating Circuit appears at
end of data sheet.
PMBus is a trademark of SMIF, Inc.
SMBus is a trademark of Intel Corp.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
±0.3% Accurate, Quad, Power-Supply Controller with
Active-Voltage Output Control and PMBus Interface
MAX16064
ABSOLUTE MAXIMUM RATINGS
AVDD, DVDD to AGND ............................................-0.3V to +4V
AVDD to DVDD......................................................-0.3V to +0.3V
AGND to DGND.....................................................-0.3V to +0.3V
AGND1 to DGND...................................................-0.3V to +0.3V
RS_+, RS_- to AGND................................................-0.3V to +6V
RS_C, A1/SCLE, A2/SDAE,
A3/CONTROL to AGND ......................-0.3V to (AVDD + 0.3V)
RESET, SMBALERT,
ENOUT_ to AGND...................-0.3V to +6V
SCL, SDA to DGND ..................................................-0.3V to +4V
DACOUT_, EN, CLKIO, REFO to AGND.....-0.3V to (AVDD + 0.3V)
DACOUT_ Current ..............................................................10mA
SDA Current ........................................................-1mA to +50mA
Input/Output Current (all other pins) ...................................20mA
Continuous Power Dissipation (T
A
= +70°C)
36-Pin 6mm x 6mm TQFN
(derate 35.7mW/°C above +70°C) .............................2857mW
Thermal Resistance (Note 1)
θ
JA
................................................................................28°C/W
θ
JC
..................................................................................1°C/W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to
www.maxim-ic.com/thermal-tutorial.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
AVDD
= V
DVDD
= 3.0V to 3.6V, V
EN
= 2V, V
RS_+
- V
RS_-
= 2V, V
RS_-
= 0V, T
A
= T
J
= -40°C to +85°C, unless otherwise specified.
Typical values are at V
AVDD
= V
DVDD
= 3.3V, T
A
= +25°C.) (Note 2)
PARAMETER
AVDD/DVDD Operating Voltage
Range
AVDD Undervoltage Lockout
(AVDD Rising)
AVDD Undervoltage Lockout
Hysteresis
AVDD and DVDD Total Supply
Current
OUTPUT-VOLTAGE SENSING
Voltage Regulation Accuracy
(2V Range)
T
A
= +25°C, V
RS_+
= 1.0V, V
RS_-
= 0V
T
A
= -40°C to +85°C, V
RS_+
= 1.0V,
V
RS_-
= 0V
T
A
= +25°C, V
RS_+
= 2.5V, V
RS_-
= 0V
T
A
= -40°C to +85°C, V
RS_+
= 2.5V,
V
RS_-
= 0V
-4
-6
-11
-16.5
0
-250
2V range, V
RS_+
= -0.25V to +2V
5.5V range, V
RS_+
= -0.25V to +5.5V
2V or 5.5V range, V
RS_-
= -0.25V to +0.25V
-20
-20
-20
+4
+6
+11
+16.5
5.5
+250
+20
+100
0
mV
mV
mV
mV
V
mV
μA
μA
V
UVLO
V
UVLO-HYS
V
RS_+
= V
RS_-
= 0V
SYMBOL
CONDITIONS
MIN
3.0
2.75
2.8
100
12
18.5
TYP
MAX
3.6
2.95
UNITS
V
V
mV
mA
Voltage Regulation Accuracy
(5.5V Range)
RS_+, RS_- Differential Mode
Range
RS_- to AGND Differential Voltage
RS_+ Input Bias Current
RS_- Input Bias Current
2
_______________________________________________________________________________________
±0.3% Accurate, Quad, Power-Supply Controller with
Active-Voltage Output Control and PMBus Interface
ELECTRICAL CHARACTERISTICS (continued)
(V
AVDD
= V
DVDD
= 3.0V to 3.6V, V
EN
= 2V, V
RS_+
- V
RS_-
= 2V, V
RS_-
= 0V, T
A
= T
J
= -40°C to +85°C, unless otherwise specified.
Typical values are at V
AVDD
= V
DVDD
= 3.3V, T
A
= +25°C.) (Note 2)
PARAMETER
Temperature Sensing Accuracy
INTERNAL OSCILLATOR
Frequency
ADC
Resolution
INTERNAL REFERENCE
Reference Voltage
DAC
Resolution
Differential Nonlinearity
Maximum Output-Voltage Range
Capacitive Load
Output-Voltage Slew Rate
DAC Output Resistance
DAC Driving Capability
DAC Output Leakage Current
CLKIO
Input Logic-Low Voltage
Input Logic-High Voltage
Input Bias Current
Input Clock Duty Cycle
Output Low Voltage
Output High Leakage
CLKIO Pullup Voltage
CLKIO Input Frequency Range
CLKIO Output Frequency
ENABLE INPUT (EN)
EN Falling Threshold Voltage
EN Rising Threshold Voltage
EN Input Leakage Current
OUTPUTS (ENOUT_,
RESET, SMBALERT)
Output Low Voltage
Output Leakage
V
OL
I
SINK
= 10mA
V
AVDD
= V
DVDD
= 1.1V, I
SINK
= 100μA
V
ENOUT_
= 5V, 0V
-1
0.4
0.4
+1
V
V
μA
V
EN_TH
1.17
1.175
-0.25
1.21
1.23
1.23
1.281
+0.25
V
V
μA
f
EXT_CLK
100
1
CLKIO in output mode, I
SINK
= 4mA
V
CLKIO
= 3.6V
-1
V
CLKIO
= 3.6V or 0V
2.1
-1
50
0.4
+1
3.6
1000
+1
0.8
V
V
μA
%
V
μA
V
kHz
MHz
DAC output > 100mV; output error < 25mV
DAC output switch open,
V
DACOUT
_ = V
REF
or 0V
-1
-250
DNL
No load
-2.5
V
REF -
1 LSB
200
0.35
10
+1
+250
12
+2.5
Bits
LSB
V
pF
V/μs
Ω
mA
nA
V
REF
T
A
= +25°C
2.048
V
12
Bits
7.6
8
8.4
MHz
SYMBOL
CONDITIONS
T
A
= 0°C to +85°C
MIN
TYP
±3
MAX
UNITS
°C
INTERNAL TEMPERATURE SENSOR
MAX16064
_______________________________________________________________________________________
3
±0.3% Accurate, Quad, Power-Supply Controller with
Active-Voltage Output Control and PMBus Interface
MAX16064
ELECTRICAL CHARACTERISTICS (continued)
(V
AVDD
= V
DVDD
= 3.0V to 3.6V, V
EN
= 2V, V
RS_+
- V
RS_-
= 2V, V
RS_-
= 0V, T
A
= T
J
= -40°C to +85°C, unless otherwise specified.
Typical values are at V
AVDD
= V
DVDD
= 3.3V, T
A
= +25°C.) (Note 2)
PARAMETER
Input Logic-Low Voltage
Input Logic-Low Hysteresis
Input Logic-High Voltage
Input Logic-High Hysteresis
Input Leakage Current
SMBus INTERFACE (SCL, SDA) (Note 3)
SCL, SDA Input Low Voltage
SCL, SDA Input High Voltage
SCL, SDA Input Leakage Current
(Per Pin)
Input Capacitance
SCL, SDA Output Low Voltage
SMBUS TIMING
Serial-Clock Frequency
Bus Free Time Between STOP
and START Condition
START Condition Setup Time
START Condition Hold Time
STOP Condition Setup Time
Clock Low Period
Clock High Period
Data Setup Time
Output Fall Time
Data Hold Time
Pulse Width of Spike Suppressed
SMBus Timeout
OTHER TIMING PARAMETERS
PMBus Command Response
Time
Fault Response Time
Recovery Time After Device
Reset
t
PMB_RSP
t
FAULT_RSP
t
RST_WAIT
No external EEPROM
300
5
15
μs
ms
ms
f
SCL
t
BUF
t
SU:STA
t
HD:STA
t
SU:STO
t
LOW
t
HIGH
t
SU:DAT
t
OF
t
HD:DAT
t
SP
t
TIMEOUT
SMBCLK time low for reset
25
C
BUS
= 10pF to 400pF
From 50% SCL falling to SDA change
300
30
55
10
4.7
4.7
4.0
4.0
4.7
4.0
250
300
100
kHz
μs
μs
μs
μs
μs
μs
ns
ns
ns
ns
ms
C
IN
V
OL
I
SINK
= 3mA
V
IL
V
IH
Input voltage falling
Input voltage rising
Device powered or unpowered, V
AVDD
= 0
to 3.6V, V
SCL
= V
SDA
= 0V or V
AVDD
2.1
-1
10
0.4
+1
0.8
V
V
μA
pF
V
-12
V
AVDD
- 0.4
50
+12
50
SYMBOL
CONDITIONS
MIN
TYP
MAX
0.3
UNITS
V
mV
V
mV
μA
ADDRESS PINS (A1/SCLE, A2/SDAE, A3/CONTROL)
Note 2:
100% production tested at T
A
= +25°C. Limits over temperature are guaranteed by design.
Note 3:
The MAX16064 supports SCL clock stretching.
4
_______________________________________________________________________________________
±0.3% Accurate, Quad, Power-Supply Controller with
Active-Voltage Output Control and PMBus Interface
Typical Operating Characteristics
(V
AVDD
= V
DVDD
= 3.3V, T
A
= +25°C, unless otherwise noted.)
TOTAL SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX16064 toc01
MAX16064
NORMALIZED EN THRESHOLD
vs. TEMPERATURE
MAX16064 toc02
NORMALIZED RESET TIMEOUT
PERIOD vs. TEMPERATURE
1.08
NORMALIZED RESET TIMEOUT
1.06
1.04
1.02
1.00
0.98
0.96
0.94
0.92
0.90
NORMALIZED AT T
A
= +25NC
MAX16064 toc03
20
TOTAL SUPPLY CURRENT (mA)
16
12
8
T
A
= +85NC
4
0
1.010
1.008
NORMALIZED EN THRESHOLD
1.006
1.004
1.002
1.000
0.998
0.996
0.994
0.992
0.990
NORMALIZED AT T
A
= +25NC
1.10
T
A
= -40NC
T
A
= +25NC
2.6
2.8
3.0
3.2
3.4
3.6
-40
-15
10
35
60
85
-40
-15
10
35
60
85
V
AVDD
= V
DVDD
(V)
TEMPERATURE (NC)
TEMPERATURE (NC)
UV_FAULT TO RESET RESPONSE
MAX16064 toc04
ENOUT_ OUTPUT LOW VOLTAGE
vs. SINK CURRENT
MAX16064 toc05
POWER SUPPLIES OUTPUT ACCURACY
vs. TEMPERATURE
POWER SUPPLIES OUTPUT ACCURACY (%)
0.4
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
-40
-15
10
35
60
85
V
OUT0
= 5V
V
OUT1
= 3.3V
V
OUT3
= 1.1V
V
OUT2
= 1.8V
MAX16064 toc06
0.8
ENOUT_ OUTPUT LOW VOLTAGE (V)
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
5
10
15
20
25
30
35
0.5
5V
V
OUT0
2V/div
3.3V
RESET
2V/div
1ms/div
40
I
SINK
(mA)
TEMPERATURE (NC)
ENOUT_WITH AVDD = DVDD RISING
AVDD = DVDD RISING 3.3V/ms
MAX16064 toc07
ENOUT_ WITH AVDD = DVDD FALLING
MAX16064 toc08
AVDD = DVDD
1V/div
AVDD = DVDD
1V/div
ENOUT0,1,2,3
2V/div
200ms/div
400Fs/div
ENOUT1,2,3,4
2V/div
_______________________________________________________________________________________
5
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