MAX6841IUKD4+T Maxim Integrated, MAX6841IUKD4+T Datasheet - Page 21

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

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

where f
charge of the high-side MOSFET, and Q
charge of the low-side MOSFET. The values used for
the gate charge are at the gate drive voltage (V
The “2” in the above equation is due to the two phases
of the converter. If multiple MOSFETs are used in paral-
lel, add the gate charges of each MOSFET to find the
total gate charge used in the above equation.
Make sure that the maximum power dissipation of the IC
is not exceeded (see the Absolute Maximum Ratings).
A properly designed PC board layout is important in any
switching DC-DC converter circuit. If possible, mount
the MOSFETs, inductor, input/output capacitors, and
current-sense resistor on the top side of the PC board.
Connect the ground for these devices close together on
a power ground plane. Make all other ground connec-
tions to a separate analog ground plane. Connect the
analog ground plane to power ground at a single point.
To help dissipate heat, place high-power components
(MOSFETs, inductor, and current-sense resistor) on a
large PC board area, or use a heat sink. Keep high cur-
SW
is approximately 250kHz, Q
Applications Information
______________________________________________________________________________________
PC Board Layout Guidelines
Controllers with Controlled VID Change
Two-Phase Desktop CPU Core Supply
GH
GL
is the gate
is the gate
VLG
).
rent traces short and wide to reduce the resistance in
these traces. Also make the gate-drive connections (DH_
and DL_) short and wide, measuring 10 to 20 squares
(50mils to 100mils wide if the MOSFET is 1in from the
controller IC).
Use Kelvin sense connections for the current-sense
resistors.
Place the REF capacitor, the V
BST_ diode and capacitor as close as possible to the IC.
If the IC is far from the input capacitors, bypass V
GND with an additional 0.1µF or greater ceramic capaci-
tor close to the V
For an example PC board layout, refer to the MAX1937
or MAX1938 evaluation kit.
TRANSISTOR COUNT: 6243
PROCESS: BiCMOS
CC
pin.
Chip Information
DD
capacitor, and the
CC
21
to