MAX6841IUKD4+T Maxim Integrated, MAX6841IUKD4+T Datasheet - Page 13

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MAX6841IUKD4+T

Manufacturer Part Number
MAX6841IUKD4+T
Description
Supervisory Circuits
Manufacturer
Maxim Integrated
Series
MAX6841, MAX6842, MAX6843, MAX6844, MAX6845r
Datasheet

Specifications of MAX6841IUKD4+T

Number Of Voltages Monitored
1
Monitored Voltage
0.9 V to 1.5 V
Undervoltage Threshold
1.35 V
Overvoltage Threshold
1.425 V
Output Type
Active High, Active Low, Push-Pull
Manual Reset
Resettable
Watchdog
No Watchdog
Battery Backup Switching
No Backup
Power-up Reset Delay (typ)
2240 ms
Supply Voltage - Max
1.8 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
SOT-23
Chip Enable Signals
No
Maximum Power Dissipation
571 mW
Minimum Operating Temperature
- 40 C
Power Fail Detection
No
Supply Current (typ)
8.1 uA
Supply Voltage - Min
0.75 V
While the on-time is set by the input and output voltage,
other factors contribute to the switching frequency. The
on-time guaranteed in the Electrical Characteristics is
influenced by switching delays in the external high-side
MOSFET. Resistive losses in the inductor, both MOSFETs,
output capacitor ESR, and PC board copper losses in
Table 1. VID Programmed Output Voltage
Note: In the above table, a zero indicates the VID_ pin is connected to GND or driven low, indicates the VID_ pin is driven high or
not connected.
VID4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
VID3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
______________________________________________________________________________________
Controllers with Controlled VID Change
VID2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
Two-Phase Desktop CPU Core Supply
VID1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
VID0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
MAX1937
Shutdown
1.550
1.525
1.500
1.475
1.450
1.425
1.400
1.375
1.350
1.325
1.300
1.275
1.250
1.225
1.200
1.175
1.150
1.125
1.100
1.075
1.050
1.025
1.000
0.975
0.950
0.925
0.900
0.875
0.850
0.825
0.800
the output and ground, tend to raise the switching fre-
quency at higher output currents. Switch dead-time can
also increase the effective on-time, reducing the
switching frequency. This effect occurs when the
inductor current reverses at light or negative load cur-
rents. With reversed inductor current, the inductor’s
MAX1938
Shutdown
V
OUT
1.850
1.825
1.800
1.775
1.750
1.725
1.700
1.675
1.650
1.625
1.600
1.575
1.550
1.525
1.500
1.475
1.450
1.425
1.400
1.375
1.350
1.325
1.300
1.275
1.250
1.225
1.200
1.175
1.150
1.125
1.100
(V)
MAX1939
Shutdown
Shutdown
2.000
1.950
1.900
1.850
1.800
1.750
1.700
1.650
1.600
1.550
1.500
1.450
1.400
1.350
1.300
1.275
1.250
1.225
1.200
1.175
1.150
1.125
1.100
1.075
1.050
1.025
1.000
0.975
0.950
0.925
13

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