ISL88031

Quintuple Voltage Monitor

Product Status: Mass Production

OVERVIEW

The ISL88031 is a quintuple voltage-monitoring supervisor combining competitive reset threshold accuracy and low power consumption. This device combines popular functions such as Power-On Reset, Undervoltage Supply Supervision, reset signaling and Manual Reset. Monitoring up to five different voltages in a small 8 Ld MSOP package, the ISL88031 devices can help to lower system cost, reduce board space requirements, and increase the reliability of multi-voltage systems.

Low VDD detection circuitry protects the user's system from low voltage conditions, resetting the system when VDD or any of the other monitored power supply voltages fall below their respective minimum voltage thresholds. The reset signal remains asserted until all of these voltages return to proper operating levels and stabilize.

With two of the five voltage monitors being preset for common supplies, users can adjust the threshold voltages of the third, fourth, and fifth voltage monitors in order to meet specific system level requirements.

KEY FEATURES

  • Quintuple Voltage Monitoring
  • Fixed-Voltage Options Allow Precise Monitoring of +5.0V, +3.3V, +3.0V, +2.5V and +1.8V Power Supplies
  • Adjustable Voltage Inputs Monitor Voltages > 0.6V
  • 120ms Nominal Reset Pulse Width
  • Manual Reset Capability
  • Reset Signals Valid Down to VDD = 1V
  • Accurate ±1.8% Voltage Threshold
  • Immune to Power-Supply Transients
  • Low 19µA Maximum Supply Current at 5V
  • Pb-Free (RoHS Compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL88031
Basic Information
Production Status
Mass Production
# of Voltage Monitors
5
Monitor Voltage Min (V)
1.8
Monitor Voltage Max (V)
5
VMONITOR
Ch1 3V or 5V Ch2 1.8V, 2.5V, 3.3V Ch3-Ch5 Adj to 0.6V Ref
Reset Output Type
Active Low
Manual Reset
Yes
TwinPin™ MR#/RST#
No
WDT
No
Adjustable POR Timeout
No
Adjustable Vtrip
Yes
Fixed Vtrip
Yes
Bus/Output Interface
N/A
Input Voltage Min (V)
2
Input Voltage Max (V)
5.5
Qualification Level
Standard
Can Sample
YES
Temperature Range
-40 to +85

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