MAX16063TG+ Maxim Integrated Products, MAX16063TG+ Datasheet - Page 9

• Manufacturer Part Number: MAX16063TG+
• Description: IC PWR MNTR/OVRVOLT PROT 24TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX16063TG+

• Applications: Power Supply Monitor, Overvoltage Protection
• Voltage - Supply: 1 V ~ 5.5 V
• Current - Supply: 45µA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 24-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Input: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

The MAX16063 is an adjustable quad window voltage
detector in a small thin QFN package. This device is
designed to provide a higher level of system reliability by
monitoring multiple supply voltages and providing a fault
signal when any of the voltages exceeds its overvoltage
threshold or falls below its undervoltage threshold.
This device offers user-adjustable thresholds that allow
voltages to be monitored down to 0.4V. It allows the
upper and lower trip thresholds of each window detector
to be set externally with the use of three external resistors.
Each monitored threshold has an independent open-
drain output for signaling a fault condition. The outputs
can be wire-ORed together to provide a single fault out-
put. The open-drain outputs are internally pulled up
with a 30µA current, but can be externally driven to
other voltage levels for interfacing to other logic levels.
The MAX16063 features a margin input to disable the
outputs during margin testing or any other time after
power-up operations and a reset output that deasserts
after a reset timeout period after all voltages are within
their threshold specification. The reset timeout is inter-
nally set to 140ms (min), but can be externally adjusted
to other reset timeouts using an external capacitor. In
addition, a manual reset input is offered.
The MAX16063 features undervoltage and overvoltage
comparators for window detection (see Figure 2).
UVOUT_/OVOUT_ deassert high when the monitored
voltage is within the “selected window.” When the moni-
tored voltage falls below the lower limit of the window
(V
voltage exceeds the upper limit (V
asserts low. The application in Figure 2 shows the
MAX16063 enabling the DC-DC converter when the
monitored voltage is in the selected window.
TRIPLOW
), UVOUT_ asserts low; or if the monitored
Applications Information
_______________________________________________________________________________________
Detailed Description
Voltage Monitoring
TRIPHIGH
Quad Window Voltage Detector
), OVOUT_
1% Accurate, Low-Voltage,
The resistor values R1, R2, and R3 can be calculated
as shown:
where R
Use the following steps to determine the values for R1,
R2, and R3:
1) Choose a value for R
Figure 2. MAX16063 Monitor Circuit
R3. Because the MAX16063 has very low input bias
current (2nA typ), R
Large-value resistors help minimize power con-
sumption. Lower-value resistors can be used to
maintain overall accuracy.
+5V
R1
R2
R3
TOTAL
UVIN_
OVIN_
= R1 + R2 + R3.
V
V
TRIPLOW
TRIPHIGH
MAX16063
V
CC
TOTAL
UVOUT_
OVOUT_
=
=
TOTAL
V
V
TH
TH
, the sum of R1, R2, and
⎛
⎜
⎝
⎛
⎜
⎝
R
R
R
can be up to 2MΩ.
2
TOTAL
TOTAL
R
EN
+
3
R
REGULATOR
3
DC-DC
GND
⎞
⎟
⎠
⎞
⎟
⎠
IN
OUT
9