3PEAK TPV706 Low Voltage Supervisory Circuits with Power Fail Detector Owner’s Manual

TPV706
Low-Voltage Supervisory Circuits
with Power-Fail Detector

Features

• Precision Low-Voltage Monitoring and Power-Fail Detector
• 200-ms (typical) Reset Timeout
• Manual Reset Input
• Independent Watchdog Timer
• Reset Output Stage
• Push-pull Active-low Output (TPV706)
• Low Power Consumption: 4-μA
• Guaranteed Reset Output Valid to VCC = 1 V
• Power Supply Glitch Immunity
• Temperature Range: −40°C to 125°C
• SOP8 Package

Applications

• Microprocessor Systems
• Computers
• Controllers
• Intelligent Instruments
• Portable Equipment

Description

The TPV706 is a supervisory circuit to monitor power supply voltage levels and provides a power-on reset signal.
A watchdog monitor is provided, which is activated if the watchdog input doesn’t toggle within 1.6 sec.
A reset signal can be asserted by an external manual reset input.
In addition, there is a power-fail detector with a 1.25-V threshold, which can be used to monitor an additional power supply.
The reset periods are fixed at 200-ms (typical). The TPV706 is available in an 8-pin SOP package and typically consumes only 4-μA, which is suitable for low- power and portable applications.

Typical Application Circuit

Product Family Table

Order Number| Threshold Voltage (V TH )| Package Marking| Package
---|---|---|---
TPV706VL1-SR (1)| 1.58| V6V| SOP8
TPV706WL1-SR (1)| 1.67| V6W| SOP8
TPV706YL1-SR (1)| 2.19| V6Y| SOP8
TPV706ZL1-SR (1)| 2.32| V6Z| SOP8
TPV706RL1-SR| 2.63| V6R| SOP8
TPV706SL1-SR| 2.93| V6S| SOP8
TPV706TL1-SR| 3.08| V6T| SOP8
TPV706ML1-SR| 4.38| V6M| SOP8
TPV706LL1-SR| 4.63| V6L| SOP8

(1) For future products, contact the 3PEAK factory for more information and samples.

Revision History

to latest datasheet format and add WDI to /WDO time information.
2022-08-29| Rev.A.4| Added WDI pulse interval spec.
2023-08-15| Rev.A.5| Added package tape and reel information, and updated datasheet format.
2024-07-09| Rev.A.6| Corrected typo in order information, corrected typo in typical application circuit.

Pin Configuration and Functions

Table 1. Pin Functions: TPV706

features an internal pull-up current.
2| VCC| P| Power supply voltage being monitored.
3| GND| G| Ground. This pin should be connected to ground reference.
4| PFI| I| Power fail input. When PFI is less than 1.25-V, PFO goes low. If unused, connect PFI to GND.
5| PFO| O| Power fail output. It goes low when PFI is less than 1.25-V, otherwise stays high.
6| WDI| **** I| Watchdog Input. Generates a reset if the voltage on the pin remains low or high for the duration of the watchdog timeout. The timer is cleared if a logic transition occurs on this pin or if a reset is generated. Floating WDI disables the watchdog function.
7| RESET| O| Active-Low Reset Push-Pull Output Stage. Asserted whenever VCC is below the reset threshold or by a low signal on the MR input. It remains low for 200-ms after VCC goes above the reset threshold or MR goes from low to high. A watchdog timeout does not trigger RESET.
8| WDO| O| Watchdog Output. Pulls low if WDI remains low or high for the duration of the watchdog timeout, and does not go high again until the watchdog is cleared. Whenever VCC is below the reset threshold, WDO stays low. As soon as VCC rises above the reset threshold, WDO goes high with no delay.

Specifications

Absolute Maximum Ratings

1. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime.
2. This data was taken with the JEDEC low effective thermal conductivity test board.
3. This data was taken with the JEDEC standard multilayer test boards.

ESD, Electrostatic Discharge Protection

1. JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
2.  JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

Thermal Information

Electrical Characteristics
All test conditions: VCC = 1.53 V to 5.5 V, TA = −40°C to 125°C, unless otherwise noted.

Supply Voltage and Current
VCC| Operating Supply Voltage| | 1| | 5.5| V
ICC| Supply Current| WDI and MR unconnected (VCC = 1.8 V)| | 4| 15| μA
WDI and MR unconnected (VCC = 5 V)| | 6| 20| μA
VTH| Reset Threshold Voltage| TPV706V| 1.51| 1.58| 1.63| V
TPV706W| 1.62| 1.67| 1.71| V
TPV706Y| 2.12| 2.19| 2.25| V
TPV706Z| 2.25| 2.32| 2.38| V
TPV706R| 2.55| 2.63| 2.70| V
TPV706S| 2.82| 2.93| 3.00| V
TPV706T| 3.00| 3.08| 3.15| V
TPV706M| 4.25| 4.38| 4.5| V
TPV706L| 4.5| 4.63| 4.75| V
| Reset Threshold Temperature Coefficient| | | 80| | ppm/°C
VHYS| Reset Threshold Hysteresis| | | 2 × __V TH 1000| | mV
tRD| VCC to Reset Delay| | | 20| | μs
tRP| Reset Timeout Period| | 140| 200| 280| ms
VOL| Reset Output Voltage Low (Push- Pull)| VCC ≥ 1 V, ISINK = 50 μA| | | 0.3| V
ISINK = 1.2 mA @ Vcc ≥ 2 V| | | 0.4| V
VOH| Reset Output Voltage High (Push-Pull)| ISOURCE = 800 μA, @ VCC≥ 5 V| 0.7 × VCC| | | V
MR Pin
VIL_MR| MR Input Threshold VIL| | | | 0.3 × VCC| V
VIH_MR| MR Input Threshold VIH| | 0.7 × VCC| | | V
tPW_MR| MR Input Pulse Width (1)| | 6| | | μs
tGR_MR| MR Glitch Rejection| | | 100| | ns
td_MR| MR to Reset Delay| | | 1| 6| μs
IMR_V0| MR Pull-up Current| VCC = 3V| | 80| | μA
tWD| Watchdog Timeout Period| | 1| 1.6| 2.4| sec
Parameter| Conditions| Min| Typ| Max| Unit
---|---|---|---|---|---
tPW_WD| WDI Pulse Width 50 ns| | 50| | | ns
Parameter| Conditions| Min| Typ| Max| Unit
VIL_WDI| WDI input threshold VIL| | | | 0.3 × VCC| V
VIH_WDI| WDI input threshold VIH| | 0.7 × VCC| | | V
IWDI| WDI input current| VWDI = VCC| | 20| | μA
VWDI = 0| | -15| | μA
VOL_WDO| WDO VOL| ISINK = 1.2 mA @ VCC ≥ 5 V| | | 0.4| V
VOH_WDO| WDO VOH| ISOURCE = 800 μA @ Vcc≥ 5 V| 0.7 x VCC| | | V
PFI and PFO
VTH_PFI| Power fail input threshold| PFI falling| 1.18| 1.25| 1.32| V
VOL_PFO| PFO VOL| ISINK = 1.6 mA @ VCC ≥ 5 V| | | 0.4| V
VOH_PFO| PFO VOH| ISOURCE = 800 μA @ VCC ≥ 5 V| 0.7 x VCC| | | V

(1) MR pulse width given by customer in application should be longer than minimum value of MR input pulse width requirement.

Typical Performance Characteristics
All test conditions: VCC = 5 V, TA = + 25°C, unless otherwise noted.

Detailed Description

Overview
The TPV706 provides supply voltage supervision, watchdog function, manual reset function, as well as a 1.25-V power-fail comparator.
Functional Block Diagram

Feature Description
RESET Output
The TPV706 features an active-low push-pull output. The reset signal is guaranteed to be logic low for VCC down to 1-V. The reset output is asserted when VCC is below the reset threshold (VTH), or when MR is driven low. Reset remains asserted for the duration of the reset active timeout period (tRP) after VCC rises above the reset threshold, or after MR transitions from low to high. Figure 13 shows the reset (active low) outputs.

Manual RESET Input
The TPV706 features a manual reset input (MR), which, when driven low, asserts the reset output. When MR transitions from low to high, reset remains asserted for the duration of the reset active timeout period before de-asserting.
The MR input has an internal pull-up current so that the input is always high when unconnected. Noise immunity is provided on the MR input, and the fast and negative-going transients are ignored. A 0.1-μF capacitor between MR and ground provides additional noise immunity.
Watchdog Input
The TPV706 features a watchdog timer, which monitors microprocessor activity. A timer circuit is cleared with every low-tohigh or high-to-low logic transition on the watchdog input pin (WDI). If the timer counts through the preset watchdog timeout period (tWD), the watchdog output (WDO) goes low, a low to high or high to low transition on the WDI pin clears the watchdog timer. The delay time from WDI toggling to WDO going high is within 35-ms. The microprocessor is required to toggle the WDI pin to avoid being reset. Whenever VCC is below the reset threshold, WDO stays low. As soon as VCC rises above the reset threshold, WDO goes high with no delay. Figure 14 shows the watchdog timing.

Power-Fail Detector
The power-fail detector is a 1.25-V comparator, which can monitor an external power supply through a resistive divider. When the voltage on the PFI is lower than 1.25-V, the comparator output goes low, indicating a power fail, which can be used as an early warning of the power fail.

Application and Implementation

Note
Information in the following application sections is not part of the 3PEAK’s component specification and 3PEAK does not warrant its accuracy or completeness. 3PEAK’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.

Application Information
Figure 15 shows the typical application circuit of TPV706. Microprocessor activity is monitored using WDI. When the WDI remains low or high for the duration of the watchdog timeout, the WDO will trigger a manual reset to MCU. The MCU can drive the MR from high to low and trigger the RESET.

Tape and Reel Information

Order Number| Package| Di (mm)| WI (mm)| AO (mm)| BO (mm)| KO (mm)| PO (mm)| WO (mm)| Pint Quadrant
---|---|---|---|---|---|---|---|---|---
TPV706xx-SR| SOPS| 330| 18.| 7.| 5.| 2| 8| 12| 1

Package Outline Dimensions

SOP8
Package Outline Dimensions SO1(SOP08-A)

Order Information

**Order Number| Operating Temperature Range| ****Package| ****Marking Information| ****MSL| ****Transport Media, Quantity| ****Eco Plan**
---|---|---|---|---|---|---
TPV706VL1-SR (1)| −40 to 125°C| SOP8| V6V| 1| Tape and Reel, 4000| Green
TPV706WL1-SR (1)| −40 to 125°C| SOP8| V6W| 1| Tape and Reel, 4000| Green
TPV706YL1-SR (1)| −40 to 125°C| SOP8| V6Y| 1| Tape and Reel, 4000| Green
TPV706ZL1-SR (1)| −40 to 125°C| SOP8| V6Z| 1| Tape and Reel, 4000| Green
TPV706RL1-SR| −40 to 125°C| SOP8| V6R| 1| Tape and Reel, 4000| Green
TPV706SL1-SR| −40 to 125°C| SOP8| V6S| 1| Tape and Reel, 4000| Green
TPV706TL1-SR| −40 to 125°C| SOP8| V6T| 1| Tape and Reel, 4000| Green
TPV706ML1-SR| −40 to 125°C| SOP8| V6M| 1| Tape and Reel, 4000| Green
TPV706LL1-SR| −40 to 125°C| SOP8| V6L| 1| Tape and Reel, 4000| Green

(1) For future products, contact the 3PEAK factory for more information and samples.
Green: 3PEAK defines “Green” to mean RoHS compatible and free of halogen substances.

IMPORTANT NOTICE AND DISCLAIMER

Copyright© 3PEAK 2012-2024. All rights reserved.
Trademarks. Any of the  or 3PEAK trade names, trademarks, graphic marks, and domain names contained in this document /material are the property of 3PEAK. You may NOT reproduce, modify, publish, transmit or distribute any Trademark without the prior written consent of 3PEAK.
Performance Information. Performance tests or performance range contained in this document/material are either results of design simulation or actual tests conducted under designated testing environment. Any variation in testing environment or simulation environment, including but not limited to testing method, testing process or testing temperature, may affect actual performance of the product.
Disclaimer. 3PEAK provides technical and reliability data (including data sheets), design resources (including reference designs), application or other design recommendations, networking tools, security information and other resources “As Is”.
3PEAK makes no warranty as to the absence of defects, and makes no warranties of any kind, express or implied, including without limitation, implied warranties as to merchantability, fitness for a particular purpose or non- infringement of any thirdparty’s intellectual property rights. Unless otherwise specified in writing, products supplied by 3PEAK are not designed to be used in any life-threatening scenarios, including critical medical applications, automotive safety-critical systems, aviation, aerospace, or any situations where failure could result in bodily harm, loss of life, or significant property damage. 3PEAK disclaims all liability for any such unauthorized use.

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GA20230801A6

References

• 3PEAK - Analog Chips and Embedded Processors, Semiconductor Company

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