19-5251; Rev 0; 4/10
KIT
ATION
EVALU
E
BL
AVAILA
12-Channel/8-Channel EEPROM-Programmable
System Managers with Nonvolatile Fault Registers
General Description
The MAX16046A/MAX16048A EEPROM-configurable sys-
tem managers monitor, sequence, track, and margin mul-
tiple system voltages. The MAX16046A manages up to
twelve system voltages simultaneously, and the
MAX16048A manages up to eight supply voltages. These
devices integrate an analog-to-digital converter (ADC) for
monitoring supply voltages, digital-to-analog converters
(DAC) for adjusting supply voltages, and configurable out-
puts for sequencing and tracking supplies (during power-
up and power-down). Nonvolatile EEPROM registers are
configurable for storing upper and lower voltage limits,
setting timing and sequencing requirements, and for
storing critical fault data for readback following failures.
An internal 1% accurate 10-bit ADC measures each input
and compares the result to one upper, one lower, and
one selectable upper or lower limit. A fault signal asserts
when a monitored voltage falls outside the set limits. Up
to three independent fault output signals are configurable
to assert under various fault conditions.
The integrated sequencer/tracker allows precise control
over the power-up and power-down order of up to twelve
(MAX16046A) or up to eight (MAX16048A) power sup-
plies. Four channels (EN_OUT1–EN_OUT4) support
closed-loop tracking using external series MOSFETs. Six
outputs (EN_OUT1–EN_OUT6) are configurable with
charge-pump outputs to directly drive MOSFETs without
closed-loop tracking.
The MAX16046A/MAX16048A include twelve/eight inte-
grated 8-bit DAC outputs for margining power supplies
when connected to the trim input of a point-of-load
(POL) module.
The MAX16046A/MAX16048A include six programmable
general-purpose inputs/outputs (GPIOs). GPIOs are
EEPROM configurable as dedicated fault outputs, as a
watchdog input or output (WDI/WDO), as a manual reset
(MR), or for margin control inputs.
The MAX16046A/MAX16048A feature two methods of
fault management for recording information during sys-
tem shutdown events. The fault logger records a failure
in the internal EEPROM and sets a lock bit protecting
the stored fault data from accidental erasure.
An I
2
C/SMBus™-compatible or a JTAG serial interface
configures the MAX16046A/MAX16048A. These devices
are offered in a 56-pin, 8mm x 8mm TQFN package or a
64-pin, 10mm x 10mm TQFP package and are fully speci-
fied from -40°C to +125°C.
Features
o
Operates from 3V to 14V
o
1% Accurate 10-Bit ADC Monitors 12/8 Inputs
o
12/8 Monitored Inputs with 1 Overvoltage/
1 Undervoltage/1 Selectable Limit
o
12/8 8-Bit DAC Outputs for Margining or Voltage
Adjustments
o
Nonvolatile Fault Event Logger
o
Power-Up and Power-Down Sequencing
Capability
o
12/8 Outputs for Sequencing/Power-Good
Indicators
o
Closed-Loop Tracking for Up to Four Channels
o
Two Programmable Fault Outputs and One Reset
Output
o
Six General-Purpose Input/Outputs Configurable as:
Dedicated Fault Output
Watchdog Timer Function
Manual Reset
Margin Enable Input
o
I
2
C/SMBus-Compatible and JTAG Interface
o
EEPROM-Configurable Time Delays, Thresholds,
and DAC Outputs
o
100 Bytes of Internal User EEPROM
o
-40°C to +125°C Operating Temperature Range
MAX16046A/MAX16048A
Applications
Servers
Workstations
Storage Systems
Networking/Telecom
Ordering Information
PART
MAX16046ACB+
MAX16046ATN+
MAX16048ACB+
MAX16048ATN+
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
PIN-PACKAGE
64 TQFP-EP*
56 TQFN-EP*
64 TQFP-EP*
56 TQFN-EP*
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*EP
= Exposed pad.
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.
12-Channel/8-Channel EEPROM-Programmable
System Managers with Nonvolatile Fault Registers
MAX16046A/MAX16048A
Typical Operating Circuit
V
SUPPLY
IN
DC-DC
EN
GND
OUT
10μF
FB
MON1
DACOUT1
EN_OUT1
V
CC
+3.3V
IN
DC-DC
OUT
MON2–MON11
SCL
SDA
V
CC
MAX16046A
EN
GND
FB
DACOUT2–
DACOUT11
EN_OUT1–
EN_OUT11
IN
DC-DC
EN
GND
FB
OUT
MON12
RESET
FAULT
WDI
WDO
RESET
INT
I/O
INT
μC
ABP
DBP
1μF
A0
DACOUT12
EN_OUT12
GND
EN
1μF
Selector Guide
PART
MAX16046A
MAX16048A
VOLTAGE-DETECTOR
INPUTS
12
8
DAC OUTPUTS
12
8
GENERAL-PURPOSE
INPUTS/OUTPUTS
6
6
SEQUENCING
OUTPUTS
12
8
2
_______________________________________________________________________________________
12-Channel/8-Channel EEPROM-Programmable
System Managers with Nonvolatile Fault Registers
ABSOLUTE MAXIMUM RATINGS
V
CC
to GND ....................……………………………-0.3V to +15V
EN, MON_, SCL, SDA, A0 ........................................-0.3V to +6V
GPIO_,
RESET
(configured as open drain) to GND.....-0.3V to +6V
EN_OUT1–EN_OUT6 (configured as open drain)
to GND.................................................................-0.3V to +12V
EN_OUT7–EN_OUT12 (configured as open drain)
to GND...................................................................-0.3V to +6V
GPIO_, EN_OUT_,
RESET
(configured as push-pull) to GND .........-0.3V to (V
DBP
+ 0.3V)
DBP, ABP to GND .........-0.3V to the lower of 3V or (V
CC
+ 0.3V)
TCK, TMS, TDI.......................................................-0.3V to +3.6V
TDO ..........................................................-0.3V to (V
DBP
+ 0.3V)
DACOUT_.................………………………-0.3V to (V
ABP
+ 0.3V)
EN_OUT1–EN_OUT6
(configured as charge pump) ............-0.3V to (V
MON1–6
+ 6V)
Continuous Current (all pins)............................................±20mA
56-Pin TQFN (derate 47.6mW/°C above +70°C) .........3810mW*
Thermal Resistance:
θ
JA
....................................................................................21°C/W
θ
JC
...................................................................................0.6°C/W
64-Pin TQFP (derate 43.5mW/°C above +70°C) ....3478.3mW*
Thermal Resistance:
θ
JA
....................................................................................23°C/W
θ
JC
......................................................................................1°C/W
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
*As
per JEDEC 51 Standard, Multilayer Board (PCB).
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.
MAX16046A/MAX16048A
ELECTRICAL CHARACTERISTICS
(V
CC
= 3V to 14V, T
A
= -40°C to +125°C, unless otherwise specified. Typical values are at V
CC
= 3.3V, T
A
= +25°C.) (Note 1)
PARAMETER
Operating Voltage Range
Undervoltage Lockout
Undervoltage-Lockout
Hysteresis
Supply Current
DBP Regulator Voltage
ABP Regulator Voltage
Boot Time
Internal Timing Accuracy
ADC
ADC Resolution
MON_ range set to ‘00’
T
A =
-40°C to
+85°C
ADC Total Unadjusted Error
(Note 4)
ADC
ERR
T
A =
-40°C to
+125°C
ADC Integral Nonlinearity
ADC Differential Nonlinearity
ADC Total Monitoring Cycle
Time
MON_ Input Impedance
ADC
INL
ADC
DNL
t
CYCLE
R
IN
MAX16046A, all channels monitored,
no MON_ fault detected (Note 5)
MON1–MON4
MON5–MON12
46
65
120
MON_ range set to ‘01’
MON_ range set to ‘10’
MON_ range set to ‘00’
MON_ range set to ‘01’
MON_ range set to ‘10’
10
0.65
0.75
0.95
0.85
0.95
1.15
0.8
0.8
150
100
140
LSB
LSB
μs
k
%FSR
Bits
SYMBOL
V
CC
V
UVLO
UVLO
HYS
I
CC
V
DBP
V
ABP
t
BOOT
(Note 2)
V
CC
= 14V, V
EN
= 3.3V, no load on any
output
C
DBP
= 1μF, no load on any output
C
ABP
= 1μF, no load on any DACOUT_
V
CC
> V
UVLO
(Note 3)
-10
2.6
2.78
50
4.8
2.7
2.88
0.8
6.5
2.8
2.96
1.5
+10
CONDITIONS
RESET
output asserted low
MIN
1.4
3
14
2.85
TYP
MAX
UNITS
V
V
mV
mA
V
V
ms
%
_______________________________________________________________________________________
3
12-Channel/8-Channel EEPROM-Programmable
System Managers with Nonvolatile Fault Registers
MAX16046A/MAX16048A
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 3V to 14V, T
A
= -40°C to +125°C, unless otherwise specified. Typical values are at V
CC
= 3.3V, T
A
= +25°C.) (Note 1)
PARAMETER
ADC MON_ Ranges
SYMBOL
ADC
RNG
CONDITIONS
MON_ range set to ‘00’ in r0Fh–r11h
MON_ range set to ‘01’ in r0Fh–r11h
MON_ range set to ‘10’ in r0Fh–r11h
MON_ range set to ‘00’ in r0Fh–r11h
ADC LSB Step Size
ADC
LSB
V
TH_EN_R
V
TH_EN_F
I
EN
MON_ range set to ‘01’ in r0Fh–r11h
MON_ range set to ‘10’ in r0Fh–r11h
EN Input-Voltage Threshold
EN Input Current
EN Input Voltage Range
CLOSED-LOOP TRACKING
Tracking Differential Voltage
Stop Ramp
Tracking Differential Voltage
Hysteresis
Tracking Differential Fault
Voltage
V
TRK_F
V
INS_
> V
TH_PL
, V
INS_
< V
TH_PG
Slew-rate register set to ‘00’
Track/Sequence Slew-Rate
Rising or Falling
TRK
SLEW
Slew-rate register set to ‘01’
Slew-rate register set to ‘10’
Slew-rate register set to ‘11’
Power-good register set to ‘00’,
V
MON
_ = 3.5V
Power-good register set to ‘01’,
V
MON
_ = 3.5V
Power-good register set to ‘10’,
V
MON
_ = 3.5V
Power-good register set to ‘11’,
V
MON
_ = 3.5V
Power-Good Threshold
Hysteresis
Power-Low Threshold
Power-Low Hysteresis
GPIO_ Input Impedance
INS_ to GND Pulldown
Impedance when Enabled
V
PG_HYS
V
TH_PL
V
TH_PL_HYS
GPIO
INR
INS
RPD
GPIO_ configured as INS_
V
INS_
= 2V
75
INS_ falling
125
280
640
320
150
70
94
91.5
89
86.5
V
TRK
V
INS_
> V
TH_PL,
V
INS_
< V
TH_PG
150
20
325
800
400
200
100
95
92.5
90
87.5
0.5
142
10
100
100
145
160
370
960
480
250
115
96
93.5
%V
MON_
91
88.5
%V
TH_PG
mV
mV
k
V/s
mV
%V
TRK
mV
EN voltage rising
EN voltage falling
0.486
-0.5
0
MIN
TYP
5.6
2.8
1.4
5.46
2.73
1.36
0.525
0.500
0.517
+0.5
5.5
V
μA
V
mV
V
MAX
UNITS
INS_ Power-Good Threshold
V
TH_PG
4
_______________________________________________________________________________________
12-Channel/8-Channel EEPROM-Programmable
System Managers with Nonvolatile Fault Registers
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 3V to 14V, T
A
= -40°C to +125°C, unless otherwise specified. Typical values are at V
CC
= 3.3V, T
A
= +25°C.) (Note 1)
PARAMETER
DAC
DAC Resolution
DACOUT_ range set to ‘11’
DAC Output Voltage Range
DAC
RNG
DACOUT_ range set to ‘10’
DACOUT_ range set to ‘01’
DACOUT_ range set to ‘11’
DAC LSB Step Size
DACOUT_ range set to ‘10’
DACOUT_ range set to ‘01’
T
A
= +25°C
I
DACOUT
= ±50μA,
mid code, DACOUT_
range set to ‘11’
T
A
= -5°C to
+85°C
T
A
= -40°C to
+125°C
T
A
= +25°C
DAC Center Code Absolute
Accuracy
DAC
ACC
I
DACOUT
= ±50μA,
mid code, DACOUT_
range set to ‘10’
T
A
= -5°C to
+85°C
T
A
= -40°C to
+125°C
T
A
= +25°C
I
DACOUT
= ±50μA,
mid code, DACOUT_
range set to ‘01’
T
A
= -5°C to
+85°C
T
A
= -40°C to
+125°C
1.195
1.190
1.187
0.896
0.890
0.888
0.597
0.592
0.590
-0.8
-1.0
-8
-150
50
DAC
PSRR
DAC
DNL
DAC
INL
DC
100mV step in 20ns with 50pF load
DACOUT_ code from 07h to F8h,
any range
DACOUT_ code from 07h to F8h,
any range
-0.6
-0.9
60
40
+0.6
+0.9
+150
50
0.601
0.901
8
0.8
0.6
0.4
3.137
2.353
1.568
1.202
1.208
1.215
1.218
0.907
0.912
0.915
0.606
0.612
0.615
+0.8
+1.0
+8
%
mV
mV
nA
pF
μs
dB
LSB
LSB
V
mV
V
Bits
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX16046A/MAX16048A
Gain Error
DAC Output Sink Capability
DAC Output Source Capability
DAC Output Switch Leakage
DAC Output Capacitive Load
DAC Output Settling Time
DAC Power-Supply Rejection
Ratio
DAC Differential Nonlinearity
DAC Integral Nonlinearity
DAC
SINK
DAC
SOURCE
Any range, T
A =
-40°C to +85°C
Any range, T
A =
-40°C to +125°C
Sinking current, I
DACOUTMAX
= 0.5mA
Sourcing current, I
DACOUTMAX
= -0.5mA
DACOUT_ switch off
(Note 5)
_______________________________________________________________________________________
5
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