TPS386000 Quad Supply Voltage Supervisors with Programmable Delay and Watchdog Timer | TI.com

TPS386000 (ACTIVE) Quad Supply Voltage Supervisors with Programmable Delay and Watchdog Timer

 

Description

The TPS3860x0 family of supply voltage supervisors (SVSs) can monitor four power rails that are greater than 0.4 V and one power rail less than 0.4 V (including negative voltage) with a 0.25% (typical) threshold accuracy. Each of the four supervisory circuits (SVS-n) assert a RESETn or RESETn output signal when the SENSEm input voltage drops below the programmed threshold. With external resistors, the threshold of each SVS-n can be programmed (where n = 1, 2, 3, 4 and m = 1, 2, 3, 4L, 4H).

Each SVS-n has a programmable delay before releasing RESETn or RESETn. The delay time can be set independently for each SVS from 1.4 ms to 10 s through the CTn pin connection. Only SVS-1 has an active-low manual reset (MR) input; a logic-low input to MR asserts RESET1 or RESET1.

SVS-4 monitors the threshold window using two comparators. The extra comparator can be configured as a fifth SVS to monitor negative voltage with voltage reference output VREF.

The TPS3860x0 has a very low quiescent current of 11 µA (typical) and is available in a small, 4-mm x 4-mm, VQFN-20 package.

Features

  • Four Independent Voltage Supervisors
  • Channel 1:
    • Adjustable Threshold Down to 0.4 V
    • Manual Reset (MR) Input
  • Channels 2, 3:
    • Adjustable Threshold Down to 0.4 V
  • Channel 4:
    • Adjustable Threshold at Any Positive or Negative Voltage
    • Window Comparator
  • Adjustable Delay Time: 1.4 ms to 10 s
  • Threshold Accuracy: 0.25% Typical
  • Very Low Quiescent Current: 11 µA Typical
  • Watchdog Timer With Dedicated Output
  • Well-Controlled Output During Power Up
  • TPS386000: Open-Drain RESETn and WDO
  • TPS386040: Push-Pull RESETn and WDO
  • Package: 4-mm × 4-mm, 20-Pin VQFN

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Parametrics

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Part number Order Threshold voltage 1 (Typ) (V) Number of supplies monitored VCC (Max) (V) VCC (Min) (V) Output driver type/reset output Time delay (ms) Features Rating Operating temperature range (C) Watchdog timer WDI (sec)
TPS386000 Order now Adjustable     4     6.5     1.8     Active-low
Open-drain    
20
300
Programmable    
Active-low enable
Manual reset
Negative voltage monitoring
Undervoltage and overvoltage monitor
Watchdog timer
Functional safety    
Catalog     -40 to 125     0.6    
TPS386000-Q1 Order now Adjustable     4     6.5     1.8     Active-low
Open-drain    
20
30
Programmable    
Active-low enable
Manual reset
Negative voltage monitoring
Undervoltage and overvoltage monitor
Watchdog timer
Functional safety    
Automotive     -40 to 125     0.6    
TPS386040 Samples not available Adjustable     4     6.5     1.8     Active-low
Push-pull    
20
300
Programmable    
Active-low enable
Manual reset
Negative voltage monitoring
Undervoltage and overvoltage monitor
Watchdog timer    
Catalog     -40 to 125     0.6    
TPS386596 Order now 2.9     4     6.5     1.8     Active-low
Open-drain    
50     Active-low enable
Manual reset    
Catalog     -40 to 125     None