Voltage Supervisors (Reset ICs)
Quick Reference GuideOverview
A voltage supervisor is a device that monitors or “supervises” a voltage rail within a system. When that monitored voltage rail falls
below or rises above a predetermined threshold voltage, the supervisor will assert a signal to enable, disable, or reset another device.
Supervisors are utilized to ensure proper system power on, prevent processor brownout conditions, and wherever a voltage rail, outof specification, could lead to performance issues or system failure.
Voltage supervisors are also known as reset ICs, voltage monitors or voltage detectors. These names all refer to the same device andare interchanged depending on the preference of the manufacturer.
For more information on various specifications of a supervisor, please see the design factor glossary on page 5 in this guide.
To view our basic training series on supervisors, please visit https://training.ti.com/voltage-supervisors-101
To learn more and view our complete voltage supervisor portfolio, please visit us at www.ti.com/supervisors

Ease-of-use

Singlechannel
TPS3803
TPS3808*
TPS3895*
TPS3897*
TPS3710
TPS3711

TLV803E
TLV809ETLV8x3/09
MCP809
TPS3809
LM809/10
LM3724Low
IQ < 1 μA

Low
IQ < 2 μA

TPS3831*/9
LM8364
TPS3847*
LMS33460

TPS3840
TPS3890*
TPS3836*/8*
LM8365
TLV840Integrated
watchdogtimer
TPS3851*
TPS3813
TPS3123*/8*
TPS3820*/3*/8*
UCC2946

Windowsupervisor

Active-highreset

Integrated
watchdogtimer
TPS3850/2*

TPS3124
TPS3824

TPS3700
TPS3701
TPS3702
TPS3703

Active-high resetand overvoltage
detectors
TPS3125*/6*
TPS3825*
TPS3837*
TPS3896*/8*
TPS3870

Power failinput

Push button

LM3704*LM3710*

TPS3422

Standalone
watchdogtimer
TPS3431*

Windowwatchdog
Backup battery
switchTPS3430*

TPS3606*
TPS3617/8
TPS3619*/20*
Chip-enablegate
TPS3600*/10*/13*

Dual channel
TPS3779/80
TPS3805
TPS3806
TPS3807
TPS3106*
LMC6953*

Watchdog

Power failinput

Push button

TPS3110*

TPS3103

TPS3420
TPS3421

Active-highreset

Active-highreset

Watchdog

TPS3305*

TPS3707*

TPS3306
TPS3705*

Triple channel

Quad channel

TPS3510
TPS3511
TPS3513
TPS3514

TPS386000
TPS386040
TPS386596

Active-highreset
TPS3307*

Bold indicates a supply voltage range of 12 V or higher*Indicates manual reset pin
Indicates automotive-grade version available (AECQ-100 qualified)Comments

Automotive grade

Chip-enabled gating

Overcurrent detection

Overvoltage detection

Power-fail PFI/PFO

Reset output topology1

Active-high reset/output

Timedelay(ms)Active-low reset/output

IDD
(typ)
(µA)

Manual reset/enable reset

Package(s)VDD
range(V)Reset thresholdaccuracy (%)

Supervisedvoltages

Watchdog timer
WDI (sec)

DeviceNumber of supervisors

Voltage supervisors (reset ICs) selection tablePrice*

Ease-of-use
TLV803ETLV809E
TLV8x3
TLV809
MCP809
TLV810
TPS3809
LM809
LM810
LM37241111111111

3.0/3.3/5.0
3.0/3.3/5.0
2.5/3/3.3/5.0
2.5/3.0/3.3/5.0
3.0
2.5/3/3.3/5.0
2.5/3.0/3.3/5.0
3.0/3.3/5.0
5.0
2.32, 3.08, 4.63

SOT-23-3, SC-70-3
SOT-23-3
SOT-23-3
SOT-23-3
SOT-23-3
SOT-23-3
SOT-23-3
SOT-23-3
SOT-23-3
SOT-23-5

1.7 to 6.0
1.7 to 6.0
1.1 to 6.0
2.0 to 6.0
1.0 to 5.5
1.1 to 6.0
1.8 to 6.5
1.0 to 6.0
1.0 to 6.0
1.0 to 5.5

0.25
0.25
9915
9101515
6200
200
200
200
240
200200240
240
190

TPS383110.9/1.2/1.6/1.8/3.0/3.3/5.0

SON-4

0.6 to 6.5

0.15

200

TPS3839

1SON-4, SOT-23-3

0.6 to 6.5

0.15

200

SOT-23-5
SOT-23-5
SC-70-5

4.5 to 18
1.0 to 6.0
1.0 to 7.0

0.38
0.65
120

SON-6

1.5 to 5.5

2.1

Prog

0.5

SON-6
SON-6
SOT-23-5, SON-6
SOT-23-5
SOT-23-5
SC-70-5

1.7 to 6.5
1.7 to 6.5
1.6 to 6.0
1.6 to 6.0
1.0 to 6.0
1.3 to 6.0

660.22
0.22
0.65
3Prog
Prog
10/20010/200
Prog

0.25
0.25
2.5
2.4
±2.5
1.5

✔
✔
✔
✔

SOT-23-6, SON-6

1.8 to 6.5

2.4

Prog

0.5

✔

TPS3847
1LM8364
1LMS33460
1Single channel
TPS3890

1TPS3895/7
TPS3896/8
TPS3836/8
TPS3837
LM8365
TPS3803111111TPS3808

1TPS3710

1TPS3711
TPS3125
TPS3126
TPS3825
TPS3840
TLV8401111110.9/1.2/1.6/1.8/2.5/3.0/
3.3/5.012
2.0
3.0
Adj./1.2/1.5/1.8/2.0/
2.5/3.0/3.3
Adj.
Adj.
1.8/2.5/3.0/3.3
1.8/2.5/3.0/3.3
2.75, 4.5
Adj./1.5
Adj./0.9/1.2/1.5/1.8/2.5/
3.0/3.3/5.0/EEPROM
Adj.

Adj.
1.2/1.5/1.8/3.0
1.2/1.5/1.8
3.3/5.0
1.6-4.9 with 0.1V steps
0.8-5.5 with 0.1V steps
0.5-1.3 with 50mV steps, 1.5,
TPS3870
11.8, 2.5, 2.8, 2.9, 3.3, 5
Window supervisor
TPS3850
TPS3700
TPS3701
TPS3702±0.5±0.5±2.2±2.2±1.5±2.2±2.2±1.5±1.5±2.5-2.5 /+1.5-2.5 /+1.5±2.5±2.5±5

✔

✔

OD
PPOD
PP
PP
PP
PP
PP
PP
OD

✔

✔

PP

Nano Iq, Ultra small✔

PP

Nano Iq, Ultra small

0.21

✔

✔
✔
✔

PP
OD
OD

Wide Vin

0.85
0.240.17✔

✔

OD

Ultra small

✔

✔
✔

PP/OD
PP/OD
PP/OD
PP
OD
OD

Ultra small
Ultra small
Nano Iq
Nano Iq
Low Iq

✔

OD

✔

OD

Wide Vin

OD
PP
OD
PP
PP/OD
PP/OD

Wide Vin✔
✔
✔
✔
✔
✔
✔
✔
✔

✔
✔
✔

✔

0.55

✔
✔
✔

0.60
0.60
0.85
0.85
0.25
0.25

✔

0.70

✔

0.59

Wide Vin✔
✔
✔

0.79
0.80
0.80
0.55
0.40
0.16

1.8 to 18

5.5

1.8 to 36
0.75 to 3.3
0.75 to 3.3
1.1 to 5.5
1.5 to 10
0.7 to 6

7
14
14
15
0.35
0.10

180180200
Prog
Prog

0.25
3.6
3.5
2.2
11

✔
✔
✔
✔
✔

✔
✔
✔
✔
✔
✔

SON-6

1.7 to 5.5

4.50

Prog

0.25

✔

✔

OD

✔

Over voltage

✔

0.86

1.6 to 6.5
1.8 to 18
1.8 to 36
1.8 to 18

105.5
77Prog.

✔
✔
✔
✔

OD
OD
OD
OD

✔
✔
✔
✔

Window watchdog

✔
✔
✔

0.75
0.70
0.89
0.79

1.7 to 5.5

4.5Prog✔

✔

0.86

✔
✔
✔

✔
✔
✔
✔

0.65
0.65
0.90
0.85
0.85
0.85
0.65
0.65
0.65
1.65

✔
✔

0.70
0.60

Adj./1.2/1.8/3.0/3.3/5.0
DFN-10Adj.
ThinSOT23-6, SON-6
Adj.
ThinSOT23-6, SON-6
1.0/1.2/1.8/3.3/5.0
ThinSOT23-6
0.5-1.3 with 50mV steps, 1.5,TPS3703
1SON-6
1.8, 2.5, 2.8, 2.9, 3.3, 5
Supervisor + watchdog timer

0.25

Adj. Window

±0.8
0.25
0.25
0.25

✔
✔
✔
✔
✔

0.25

✔

✔

OD
OD
OD
OD
PP
PP
OD
PP/OD
PP
PP
PP

TPS385111.8/2.5/3.0/3.3/5.0
TPS3852
13.3
TPS381312.5/3.0/3.3/5.0
TPS3123
11.2/1.8
TPS3124
11.2/1.5/1.8
TPS3128
11.2/1.5/1.8
TPS3820/8
13.3/5.0
TPS3823
12.5/3.0/3.3/5.0
TPS3824
12.5/3.0/3.3/5.0
UCC2/3946
1
Adjustable
Standalone watchdog timer

DFN-8
DFN-8
SOT-23-6SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
TSSOP-8

1.6 to 6.5
1.6 to 6.5
2.0 to 6.0
0.75 to 3.3
0.75 to 3.3
0.75 to 3.3
1.1 to 5.5
1.1 to 5.5
1.1 to 5.5
2.1 to 5.5

10
10
9
14
14
14
15
15
15
12200
200
25180
180
180
25/200200200Prog

Adj.
Adj. Window
Adj. Window
1.4
1.4
1.4
0.2/1.6
1.6
1.6
Prog

±0.8
±0.8
2.2
3.6
3.6
3.5
2.4
2.4
2.22

✔
✔

✔

✔
✔
✔
✔
✔
✔
✔
✔
✔
✔

TPS3430
TPS3431

VSON-10
VSON-8

1.6 to 6.5
1.8 to 6.5

1010Prog
200

Adj. Window
Adj.

N/A
N/A

✔
✔

✔
✔

N/A
N/A

0.30

ThinSOT23-6,
WSON-6
ThinSOT23-6
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5

12
2
2

N/A
N/A

✔

0.18
0.20
0.20
0.25
0.19
0.20
0.24
0.23
0.23
0.75

✔
✔
✔
✔

✔

✔

OD
OD

Window watchdog
Window watchdog

Window watchdog

1

PP = push-pull, OD = open drain.
*Suggested resale price in U.S. dollars in quantities of 1,000.

Voltage Supervisors (Reset ICs)

2Texas Instruments 2020

✔

PP/OD

SC-70-5
SOT-23-6
SC-70-5
SOT-23-6
SOT-23-6
SO-8, MSOP-8
SO-8, MSOP-8
SO-8, DIP-8
SO-14, DIP-14
QFN
MSOP-8

1.3 to 6.0
1.3 to 6.0
1.8 to 6.5
0.4 to 3.3
0.4 to 3.3
2.7 to 6.0
2.0 to 6.0
4.0 to 15
4.5 to 15
1.8 to 6.5
1.8 to 6.5

33
3.5
1.2
1.2
1515
1 mA
1 mA
97.5

20
130
130
200
200
300
300
Prog
50

1.52
1
0.75
0.75
2.7
2.7
9.1
9.1
0.25
0.25

✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔

PP
OD
OD
OD
PPPP
PP
OD
OD
PP/OD
OD

Comments

Automotive grade

1

Chip-enabled gating

1.8

Overcurrent detection

SON-6, SOT-23-6 1.5 to 6.5

Overvoltage detection

IDD(typ)(µA)

Power-fail PFI/PFO

Reset output topology1

Active-high reset/output

Active-low reset/output

Manual reset/enable reset

VDD
range(V)

Package(s)Timedelay(ms)Reset thresholdaccuracy (%)

Supervisedvoltages

Watchdog timer
WDI (sec)

DeviceNumber of supervisors

Voltage supervisors (reset ICs) selection table (continued)

Price*✔

0.50

✔

0.34
0.450.95
0.90
0.99
1.00
1.05
0.45
0.70
0.950.85

Multiple channels
TPS3779/80

2

Adj.

TPS3805
TPS3806
TPS3807
TPS3106
TPS3110
TPS3305
TPS3307
TPS3510/1
TPS3513/4
TPS3860x0
TPS386596

2222223
3
3
4
4

Adj./3.3
Adj./2.0/3.3
3/3.5
Adj./0.9/1.6/3.3
Adj./0.9/1.2/1.5/3.3
1.8/2.5/3.3/5.0
Adj./1.8/2.5/3.3/5.0
3.3/5.0/12.0
3.3/5.0/12.0
Adj. (includes negative rail)
Adj./3.0

1.1
1.60.6

✔
✔
✔
✔

✔
✔

✔
✔

✔

Different Hysteresis
Options

✔
✔
✔

✔
✔
✔
✔

PC power supplies
PC power supplies✔

✔

Power fail input
TPS3103
TPS3705
TPS3707
TPS3306
LM37042222
2

1.2/1.5/2.0/3.3
3.0/3.3/5.0
2.5/3.0/3.3/5.0
1.5/1.8/2.0/2.5/3.3/5.0
2.32, 3.08, 3.6

SOT-23-6
SO-8, MSOP-8
SO-8, MSOP-8
SO-8, MSOP-8
VSSOP-10

0.4 to 3.3
2.0 to 6.0
2.0 to 6.0
2.7 to 6.0
1.0 to 5.5

1.230
20
1528

130200200
100
28, 200

LM371022.32, 3.08, 4.63

VSSOP-10

1.0 to 5.52828, 200

0.75
2.1
2.2
2.7±2✔
✔
✔
✔

✔
✔
✔
✔
✔

0.0062 to25.6±2

✔

2.3
21.7

✔
✔
✔

1.60.8OD
PP
PPOD
PP/OD✔
✔
✔
✔
✔

✔

PP/OD

✔

✔
✔
✔

PP
PPPP

✔
✔

✔

PP

✔

✔

PP

✔

✔

✔

0.90
0.80
0.75
1.05
0.77
1.10

Battery backup switchover supply supervisors
TPS3600
TPS3606-33
TPS3613-01

111

2.0/2.5/3.3/5.0
3.3
Adjustable

TSSOP-14
MSOP-10MSOP-10

1.6 to 5.5
1.6 to 5.5
1.6 to 5.5

202020100100
100

0.8
0.8

TPS3617/8

14.55

MSOP-8

1.6 to 5.5

15

100

0.8

TPS3619/20

13.3/5.0

MSOP-8

1.6 to 5.5

15

10022

✔

✔

2.15
1.45
1.50

✔
✔

TPS3617 includes battery
freshness seal
TPS3619 includes battery
freshness seal

1.33
1.10

1

PP = push-pull, OD = open drain.
*Suggested resale price in U.S. dollars in quantities of 1,000.

Benefits and features of voltage supervisors (reset ICs)Window supervisor
Detect overvoltage fault events in addition to undervoltage fault events to alert a system if a voltage rail deviated from its
permissible tolerance.
3.3 V

1.8 V

VDD
INA

OUTA

TPS3701
INB

OUTB
GND

Voltage Supervisors (Reset ICs)

Open-drain
output only
Resetoutput

Overvoltage
threshold
Undervoltage
threshold

Resetoutput

3Texas Instruments 2020

Benefits and features of voltage supervisors (reset ICs) (continued)
Wide input voltage
For voltage rails greater than 7 V, TI’s family of wide-input supervisors can operate and monitor directly off an input voltage rail of
12 V or more.
12 V

3.3 V

VDD
Open-drain
output only

TPS3710OUTIN

Undervoltage
threshold

Resetoutput
Resetoutput

GND

Nano power + small size
TI’s family of nano-power, small-size supervisors help improve system efficiency, increase battery life and address PCB size
constraints.
3.3 VTPS

VDD

VDD

TPS3831Microcontroller

389x/9m

1.5-mm

5-1-m

1.

GND

mmm

RESET

RESET
GNDmMR

TPS

3831

1-1 mm

1 mm

High accuracy
For voltage rails with tight tolerance specifications, such as those found in processors and FPGAs, TI’s high-accuracy voltage
supervisors (down to 0.9% error tolerance) detect fault events with extreme precision.
5V
BIAS
IN

1.25 VOUT

1.0 V ± 1%

VDD

LDO

FPGA

VDD
GND

SENSE

OV

GPIO

UVRESETTPS3702
SET
GND

Integrated watchdog timer
In addition to monitoring voltage rails, many processors or FPGAs also need a watchdog timer to detect and recover from ahardware fault or program error. Using a supervisor with an integrated watchdog timer, one device has the ability to both monitor
voltage as well as processor faults.
WDI
1.8 V
1.2 V
VDD

SENSETPS3850
SET0

OV/UVC WD
C RSTGND

V CORE

VI/O

Microcontroller

SET1

WDO

Correct
operation

WDI

Early fault

WDO

RESET

WDO

NMI

WDI

GPIO

Late fault

WDI
WDO

GND

Windowtimingt WDL(typ)Voltage Supervisors (Reset ICs)

4

Validwindowt WDU(typ)Texas Instruments 2020

Benefits and features of voltage supervisors (reset ICs) (continued)
Push-button reset IC
Being able to reset a system by holding down a button or two is critical to applications where it is not easy to remove the battery.
They are also useful when a processor is frozen and a user needs to force the application to reset. In such cases, a push-button reset
IC can monitor these user presses and provides a reset after a given time period has been met.
1.8 V
PB1
VDD

TPS3421PB1

RSTMicroprocessor

PB2

RESET

PB2
GND

7.5s

V I/O

GND

RESET
400ms

Design factors• Reset time delay (TD) — Refers to the amount of time the reset output takes to de-assert when the monitored voltage has
returned above the voltage threshold.
• Reset output polarity — The reset output can assert high (Active-High) or low (Active-Low) in the event of a fault.
• Reset output topology — The reset output comes in two flavors: open-drain (OD) and push-pull (PP). An open-drain (or 		open-collector) output requires the output be tied to an external voltage via a pull-up resistor. A push-pull (or CMOS) output
both sinks and sources current without needing to be tied to an external voltage.
• Package — TI’s Reset ICs are available in leaded (ex. SOT23-3) and unleaded packages (ex. X2SON). The smallest 		voltage supervisors in TI’s portfolio are 1 mm2.
• Watchdog timer (WDT) — Monitors a periodic pulse from a processor and provides a reset signal to the processor when 		that pulse has not been received within a designated time period. This increases redundancy in systems that can't afford anundetected processor hang or freeze.
• Supply current (IDD) — Voltage supervisor current draw. Minimizing the supply current is critical in extending battery life andensuring more efficient system operation.
• Manual reset (MR) / Enable (EN) — Allows manual intervention to assert the reset output.
• Voltage threshold accuracy — Determines how close the actual threshold voltage is to the target threshold voltage.
• AEC-Q100 qualification — Many of TI’s voltage supervisors are qualified for use in automotive applications.
This is indicated by a “-Q1” suffix. Other devices can be qualified upon request.

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