1
Multiple Voltage Supervisory ICs
ISL6131, ISL6132
The ISL6131 and ISL6132 are a family of high-accuracy,
multi-voltage supervisory ICs designed to monitor voltages
greater than 0.7V in applications ranging from
microprocessors to industrial power systems. The ISL6131 is
an undervoltage four-supply supervisor, and the ISL6132 is a
two-voltage supervisor monitoring for undervoltage (UV) and
overvoltage (OV) conditions.
Both ICs feature four external resistor programmable voltage
monitoring (VMON) inputs, each with a related STATUS output
that individually reports the related monitor input condition. In
addition, there is a Power-Good (PGOOD) signal that asserts
high when the STATUS outputs are in their correct state. A
stability delay of approximately 160ms ensures that the
monitored supply is stable before STATUS and PGOOD are
released to go high. The PGOOD and STATUS outputs are
open-drain to allow OR’ing of the signals and interfacing to a
wide range of logic levels.
STATUS and PGOOD outputs are guaranteed to be valid with IC
bias lower than 1V, eliminating concern about STATUS and
PGOOD outputs during IC bias up and down. VMON inputs are
designed to ignore momentary transients on the monitored
supplies.
Features
• Operates from 1.5V to 5.5V Supply Voltage
• Four Adjustable Voltage Monitoring Thresholds
• 150ms STATUS/PGOOD Stability Time Delay
• Four Individual Open Drain STATUS Outputs
• Guaranteed STATUS/PGOOD Valid to V
DD
<1V
•V
DD
and VMON Glitch Immunity
•V
DD
Lock-Out
•4mm X 4mm QFN Package
- Compliant to JEDEC PUB95 MO-220
QFN - Quad Flat No Leads - Package Outline
- Near Chip Scale Package footprint, which improves PCB
efficiency and has a thinner profile
• Pb-Free (RoHS Compliant)
Applications
• Multivoltage DSPs and Processors
• µP Voltage Monitoring
• Embedded Control Systems
•Graphics Cards
• Intelligent Instruments
•Medical Equipment
• Network Routers
• Portable Battery-Powered Equipment
•Set-Top Boxes
• Telecommunications Systems
FIGURE 1. ISL6131 TYPICAL APPLICATION USAGE FIGURE 2. ISL6132 TYPICAL APPLICATION USAGE
STATUS D
STATUS C
STATUS B
STATUS A
VMON_B
VMON_A
VMON_D
VMON_C
A IN
GROUND
V
DD
B IN
C IN
D IN
PGOOD
EN
UVSTATUS_1
OVSTATUS_1
UVSTATUS_2
OVSTATUS_2
UVMON_2
UVMON_1
OVMON_2
OVMON_1
V1 IN
GROUND
V
DD
V2 IN
PGOOD1
EN1
PGOOD2
EN2
Ru
Rm
Rl
February 11, 2014
FN9119.6
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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