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MAX6876ETX+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39
MAX6876
EEPROM-Programmable, Quad,
Power-Supply Tracker/Sequencer Circuit
_______________________________________________________________________________________ 7
GND
GND
GND
GND
V
TRKEN
V
TRKEN
BUS VOLTAGE MONITORED THROUGH TRKEN INPUT
RESET
MONITORED THROUGH SET THRESHOLDS ON IN_ INPUTS
(EEPROM-SELECTABLE)
IN4 = 1.5V
IN3 = 1.8V
IN2 = 2.5V
IN1 = 3.3V
OUT4 = 1.5V
OUT3 = 1.8V
OUT2 = 2.5V
OUT1 = 3.3V
EEPROM-
ADJUSTED
SLEW RATE
t
GATE
t
GATE
t
GATE
t
GATE
t
RESET
Figure 2. Sequencing Timing Diagram
Timing Diagrams (continued)
MAX6876
EEPROM-Programmable, Quad,
Power-Supply Tracker/Sequencer Circuit
8 _______________________________________________________________________________________
ENABLE
SYNCH
OUT1 = 4V
OUT2 = 3V
OUT3 = 2V
OUT4 = 1V
Figure 4. Sequencing Ramp Down Diagram
FULL TRK
MIX WITH 2 RAMP
FULL SEQ
MIX WITH 3 RAMP
(FAST SHUTDOWN BIT SET)
Figure 5. Mixed-Mode Tracking/Sequencing Examples
Timing Diagrams (continued)
GND
GND
GND
GND
t
RESET
GATE
BUS VOLTAGE MONITORED THROUGH TRKEN INPUT
MONITORED THROUGH SET THRESHOLDS ON IN_ INPUTS
(EEPROM-SELECTABLE)
IN1 = 2.5V
IN2 = 1.8V
IN4 = 0.7V
IN3 = 0.9V
OUT1 = 2.5V
OUT2 = 1.8V
OUT3 = 0.9V
OUT4 = 0.7V
EEPROM-
SELECTED
SLEW RATE
EEPROM-
SELECTED
SLEW RATE
(FORCED INTO
QUICK SHUTDOWN
WHEN IN1 FAILS)
V
TRKEN
V
TRKEN
RESET
Figure 3. Voltage Tracking with Forced Shutdown (IN1 UV Failure)
MAX6876
EEPROM-Programmable, Quad,
Power-Supply Tracker/Sequencer Circuit
_______________________________________________________________________________________ 9
Typical Operating Characteristics
(V
CC
= 3.3V, ENABLE = MARGIN = MR = ABP = TRKEN, T
A
= +25°C, unless otherwise noted.)
0.90
1.00
1.10
1.20
1.30
1.40
1.50
1.60
1.70
1.80
1.90
2.00
2.7 3.4 4.1 4.8 5.5
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX6876 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
1.100
1.050
1.000
0.950
0.900
-40 10-15 35 60 85
NORMALIZED TIMEOUT PERIOD
vs. TEMPERATURE
MAX6876 toc02
TEMPERATURE (
°
C)
NORMALIZED TIMEOUT PERIOD
0.975
0.980
0.985
0.990
0.995
1.000
1.005
1.010
1.015
-40 -15 10 35 60 85
NORMALIZED IN_ THRESHOLD
vs. TEMPERATURE
MAX6876 toc03
TEMPERATURE (
°
C)
NORMALIZED IN_
MAXIMUM IN_ TRANSIENT DURATION
vs. IN_ THRESHOLD OVERDRIVE
MAX6876 toc04
IN_ THRESHOLD OVERDRIVE (mV)
MAXIMUM IN_ TRANSIENT DURATION (µs)
10010
10
20
30
40
50
60
70
80
90
100
110
120
130
0
1 1000
0
1.0
0.5
2.5
2.0
1.5
3.0
3.5
4.5
4.0
5.0
0693 1215182124273033
GATE OUTPUT-VOLTAGE LOW
vs. SINK CURRENT
MAX6876 toc05
I
SINK
(mA)
V
GOL
(V)
0.985
0.990
1.000
0.995
1.005
1.010
-40 10-15 35 60 85
NORMALIZED PG AND OC THRESHOLD
vs. TEMPERATURE
MAX6876 toc06
TEMPERATURE (°C)
NORMALIZED PG AND OC
10ms/div
TRACKING MODE
OUT_
0V
MAX6876 toc07
OUT4
OUT3
OUT2
OUT1
1V/div
20ms/div
TRACKING MODE WITH
FAST SHUTDOWN
OUT_
0V
MAX6876 toc08
OUT4
OUT3
OUT2
OUT1
1V/div
10ms/div
SEQUENCING MODE
OUT_
0V
MAX6876 toc09
OUT4
OUT3
OUT2
OUT1
1V/div
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39

MAX6876ETX+

Mfr. #:
Buy MAX6876ETX+
Manufacturer:
Maxim Integrated
Description:
Supervisory Circuits EEPROM-Prog Quad Power-Sup Sequence
Lifecycle:
New from this manufacturer.
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