TPS3870-Q1 Automotive high-accuracy overvoltage reset IC with time delay and manual reset | TI.com

TPS3870-Q1
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Automotive high-accuracy overvoltage reset IC with time delay and manual reset

 

Description

The TPS3870-Q1 device is an integrated overvoltage (OV) monitor or reset IC in industry’s smallest 6-pin DSE package. This highly accurate voltage supervisor is ideal for systems that operate on low-voltage supply rails and have narrow margin supply tolerances. Low threshold hysteresis prevent false reset signals when the monitored voltage supply is in its normal range of operation. Internal glitch immunity and noise filters further eliminate false resets resulting from erroneous signals.

The TPS3870-Q1 does not require any external resistors for setting overvoltage reset thresholds, which further optimizes overall accuracy, cost, solution size, and improves reliability for safety systems. The Capacitor Time (CT) pin is used to select between the two available reset time delays designed into each device and also to adjust the reset time delay by connecting a capacitor. A separate SENSE input pin and VDD pin allow for the redundancy sought by high-reliability systems.

This device has a low typical quiescent current specification of 4.5 µA (typical). The TPS3870-Q1 is suitable for automotive applications and is qualified for AEC-Q100 Grade 1.

Features

  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C7B
  • Input voltage range: 1.7 V to 5.5 V
  • Undervoltage lockout (UVLO): 1.7 V
  • Low quiescent current: 7 µA (Max)
  • High threshold accuracy:
    • ± 0.25% (typical)
    • ± 0.7% (–40°C to +125°C)
  • Fixed threshold levels
    • 50-mV steps from 500 mV to 1.3 V
    • 1.5 V, 1.8 V, 2.5 V, 2.8 V, 2.9 V 3.3 V, 5 V
  • User adjustable voltage threshold levels
  • Internal glitch immunity and hysteresis
  • Tolerance available from 3% to 7% in 1% steps
  • Fixed time delay options: 50 µs, 1 ms, 5 ms, 10 ms, 20 ms, 100 ms, 200 ms
  • Programmable time delay option with a single external capacitor
  • Open-drain active low OV monitor
  • RESET voltage latching output mode

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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)
TPS3870-Q1 Order now 0.8
3.3    
1     5.5     1.7     Active-low
Open-drain    
Programmable
0.05
1
5
10
20
100
200    
Overvoltage monitor
Latching
Manual reset
Reset time delay
Safety documentation    
Automotive     -40 to 125     None    
TPS3703-Q1 Order now 0.8
0.9
1.1
1.2
1.25
1.8
2.8
2.9
3.3
5    
1     5.5     1.7     Active-low
Open-drain    
Programmable
0.05
1
5
10
20
100
200    
Undervoltage and overvoltage monitor
Undervoltage only monitoring
Latching
Manual reset
Safety documentation    
Automotive     -40 to 125     None    
TPS3840-Q1 Order now Trimmable
1.6
2.5
2.7
2.9
4.2    
1     10     1.5     Active-high
Active-low
Open-drain
Push-pull    
Programmable     Manual reset     Automotive     -40 to 125     None    
TPS3890-Q1 Order now Adjustable
1.15
1.44
1.73
2.4
2.89
2.93
3.066
3.17
4.4
4.65
4.8    
1     5.5     1.5     Active-low
Open-drain    
Programmable     Active-low enable
Manual reset    
Automotive     -40 to 125     None