MAX6841IUKD3+T Maxim Integrated, MAX6841IUKD3+T Datasheet - Page 11

• Manufacturer Part Number: MAX6841IUKD3+T
• Description: Supervisory Circuits
• Manufacturer: Maxim Integrated
• Series: MAX6841, MAX6842, MAX6843, MAX6844, MAX6845r

Specifications of MAX6841IUKD3+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): 280 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

PIN
10
11
12
13
14
15
16
17
18
19
20
21
1
2
3
4
5
6
7
8
9
PWRGD
NAME
GNDS
PGND
VPOS
TIME
BST2
VID0
VID1
VID2
VID3
VID4
GND
______________________________________________________________________________________
DH2
V
ILIM
CS2
REF
LX2
DL2
EN
FB
DD
Controllers with Controlled VID Change
Two-Phase Desktop CPU Core Supply
Voltage Identification Input Bit 0. See Table 1. Internal 100kΩ pullup resistor to V
Voltage Identification Input Bit 1. See Table 1. Internal 100kΩ pullup resistor to V
Connect to an external resistor (47kΩ to 470kΩ) for VID change slew-rate control.
Voltage Identification Input Bit 2. See Table 1. Internal 100kΩ pullup resistor to V
Voltage Identification Input Bit 3. See Table 1. Internal 100kΩ pullup resistor to V
Voltage Identification Input Bit 4. See Table 1. Internal 100kΩ pullup resistor to V
Voltage Positioning. Connect a resistor between VPOS and REF to set the output voltage-positioning
droop, or connect directly to REF for no output voltage positioning. Connect a 47pF capacitor from
VPOS to GND.
IC Analog Power-Supply Input. Connect a 5V supply to V
Current-Limit Threshold per Phase. Connect ILIM to V
connect to a voltage-divider from REF to GND to adjust the current limit. See the Setting the Current
Limit section.
Ground
Remote Ground Sense. Connect GNDS to the output ground at the load. For VRM applications, also
connect a 100Ω resistor from GNDS to PGND locally.
Reference Output. Connect a 0.1µF capacitor from REF to GND.
Enable Input. Leave unconnected or drive high for normal operation. Drive low for shutdown.
Remote Feedback Sense. Connect FB to the output at the load. For VRM applications, also connect
a 100Ω resistor from FB to the output locally.
Power-Good Output. Open-drain output is high impedance when the output is in regulation and
pulled low when the output deviates more than 12.5% from the voltage set by the VID code. PWRGD
is also low in shutdown or during any fault condition. To use as a logic output, connect a pullup
resistor from PWRGD to the logic supply.
High-Side MOSFET Gate-Driver Bootstrap Input. Connect 0.22µF or higher value bypass capacitor
from BST2 to LX2. Keep trace length as short as possible. Connect a Schottky diode between BST2
and VLG. See the Selecting a BST Capacitor section.
High-Side MOSFET Gate-Drive Output. Connect to the high-side MOSFET gate. DH2 is pulled low in
shutdown.
Inductor Connection. Connect to the switched side of the inductor.
Negative Current-Sense Input. Connect to a current-sense resistor in series with the low-side
MOSFET, or connect to LX2 to use the low-side MOSFET’s on-resistance for current sensing.
Low-Side MOSFET Gate-Driver Output. Connect to the low-side MOSFET gate. DL2 is pulled low in
shutdown.
Power Ground. Connect to power ground at the point where the current-sense resistors or low-side
MOSFET sources connect. PGND is used as the positive current-sense connection.
FUNCTION
DD
DD
to set a default current limit of 120mV, or
.
Pin Description
DD
DD
DD
DD
DD
.
.
.
.
.
11