Texas Instruments TPS3703 Manuale utente

TPS3703 High Accuracy Overvoltage and Undervoltage Reset IC With Time Delay and

Manual Reset

1 Features

• 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 window 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

– Available in UV threshold only

– Window tolerance available from ±3% to ±7%

• User adjustable voltage threshold levels

• Internal glitch immunity and hysteresis

• 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 UV and OV monitor

• RESET voltage latching output mode

2 Applications

•Motor drives

•Factory automation and control

•Home theater and entertainment

•Grid infrastructure

•Data center and enterprise computing

RESET

VDD

SENSE MR

GND

RESET

VCORE

Processor

OV Threshold

UV Threshold

Optional

TPS3703

Monitor Voltage

10k 

Integrated Overvoltage and Undervoltage

Detection

3 Description

The TPS3703 device is an integrated overvoltage

(OV) and undervoltage (UV) 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 TPS3703 does not require any external resistors

for setting overvoltage and undervoltage 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 TPS3703 is

suitable for industrial applications and applications

that require accurate undervoltage and overvoltage

monitoring.

Device Information

PART NUMBER PACKAGE(1) BODY SIZE (NOM)

TPS3703 WSON (6) 1.50 mm × 1.50 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

VIT+(OV) Accuracy (%)

Frequency (%)

-0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4

D004

Typical Overvoltage Accuracy Distribution

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TPS3703

SBVS249B – MAY 2020 – REVISED NOVEMBER 2020

Product Folder Links: TPS3703

TPS3703

SBVS249B – MAY 2020 – REVISED NOVEMBER 2020

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

Table of Contents

1 Features............................................................................1

2 Applications..................................................................... 1

3 Description.......................................................................1

4 Revision History.............................................................. 2

5 Device Comparison......................................................... 3

6 Pin Configuration and Functions...................................4

Pin Functions.................................................................... 4

7 Specifications.................................................................. 5

7.1 Absolute Maximum Ratings ....................................... 5

7.2 ESD Ratings .............................................................. 5

7.3 Recommended Operating Conditions ........................5

7.4 Thermal Information ...................................................6

7.5 Electrical Characteristics ............................................6

7.6 Timing Requirements .................................................7

7.7 Timing Diagrams ........................................................8

7.8 Typical Characteristics.............................................. 10

8 Detailed Description......................................................14

8.1 Overview................................................................... 14

8.2 Functional Block Diagram......................................... 14

8.3 Feature Description...................................................14

8.4 Device Functional Modes..........................................17

9 Application and Implementation.................................. 18

9.1 Application Information............................................. 18

9.2 Typical Application.................................................... 23

10 Power Supply Recommendations..............................27

10.1 Power Supply Guidelines........................................27

11 Layout........................................................................... 27

11.1 Layout Guidelines................................................... 27

11.2 Layout Example...................................................... 27

12 Device and Documentation Support..........................28

12.1 Device Nomenclature..............................................28

12.2 Documentation Support.......................................... 30

12.3 Receiving Notification of Documentation Updates..30

12.4 Support Resources................................................. 30

12.5 Trademarks.............................................................30

12.6 Electrostatic Discharge Caution..............................30

12.7 Glossary..................................................................30

13 Mechanical, Packaging, and Orderable

Information.................................................................... 30

4 Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Changes from Revision A (June 2020) to Revision B (November 2020) Page

• Added Added VIT < 800 mV threshold option to Electrical Characteristics table ............................................... 6

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5 Device Comparison

Figure 5-1 shows the device nomenclature of the TPS3703. For all possible voltages, window tolerance, time

delays, and UV threshold options, see Table 12-1. Contact TI sales representatives or on TI's E2E forum for

details and availability of other options; minimum order quantities apply.

TPS 3703 X X XXX XXX

Time Delay Op



A: CT (open) 10 ms, CT (VDD) = 200 ms

B: CT (open) 1 ms, CT (VDD) = 20 ms

C: CT (open) 5 ms, CT (VDD) = 100 ms

D: CT (open) 50 µs, CT (VDD) = 50 µs

…

Nominal Threshold Op



050: 0.50V

...

500: 5.00V

Tolerance Op



3: UV/OV = 3%

4: UV/OV = 4%

5: UV/OV = 5%

6: UV/OV = 6%

7: UV/OV = 7%

Package

DSE: WSON (6-pin)

Figure 5-1. TPS3703 Device Nomenclature

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TPS3703

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6 Pin Configuration and Functions

SENSE

VDD

CT RESET

GND

Figure 6-1. DSE Package

6-Pin WSON

Top View

Pin Functions

PIN I/O DESCRIPTION

NO. NAME

1 SENSE I

Input for the monitored supply voltage rail. When the SENSE voltage goes above the overvoltage

threshold or below the undervoltage threshold, the RESET pin is driven low. Connect to VDD pin if

monitoring VDD supply voltage.

2 VDD I Supply voltage input pin. Good analog design practice is to place a 0.1-μF ceramic capacitor close to

this pin.

3 CT I

Capacitor time delay pin. The CT pin offers two fixed time delays by connecting CT pin to VDD or

leaving it floating. Delay time can be programmed by connecting an external capacitor reference to

ground.

4 RESET O

Active-low, open-drain output. This pin goes low when the SENSE voltage rises above the internally

overvoltage threshold (VIT+) or below the undervoltage threshold (VIT–). See the timing diagram in

Figure 8-2 for more details. Connect this pin to a pull-up resistor terminated to the desired pull-up

voltage.

5 GND — Ground

6 MR I

Manual reset (MR), pull this pin to a logic low (VMR_L) to assert a reset signal . After the MR pin is

deasserted the output goes high after the reset delay time(tD) expires. MR can be left floating when not

in use.

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7 Specifications

7.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)(1)

MIN MAX UNIT

Voltage VDD –0.3 6 V

Voltage VRESET –0.3 6 V

Voltage VCT –0.3 6 V

Voltage VSENSE –0.3 6 V

Voltage VMR –0.3 6 V

Current IRESET ±40 mA

Temperature (2)

Continuous total power dissipation See the Thermal Information

Operating junction temperature, TJ-40 150 °C

Operating free-air temperature, TA-40 150 °C

Storage temperature, Tstg -65 150 °C

(1) Stresses beyond values listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress

ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under

Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device

reliability.

(2) As a result of the low dissipated power in this device, it is assumed that TJ = TA.

7.2 ESD Ratings

VALUE UNIT

V(ESD)

Electrostatic

discharge

Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001 (2) ±2000 V

Charged device model (CDM), per JEDEC specification JESD22-C101(1) ±750

(1) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

(2) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.

7.3 Recommended Operating Conditions

MIN NOM MAX UNIT

VDD Supply pin voltage 1.7 5.5 V

VSENSE Input pin voltage 0 5.5 V

VCT CT pin voltage (1) (3) VDD V

VRESET Output pin voltage 0 5.5 V

VMR MR pin Voltage (2) 0 5.5 V

IRESET Output pin current 0.3 10 mA

TJJunction temperature (free-air temperature) -40 125 ℃

(1) CT pin connected to VDD pin requires a pullup resistor; 10 kΩ is recommended.

(2) If the logic signal driving MR is less than VDD, then additional current flows into VDD and out of MR.

(3) The maximum rating is VDD or 5.5 V, whichever is smaller.

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7.4 Thermal Information

THERMAL METRIC(1)

TPS3703

UNITDSE (WSON)

PINS

RθJA Junction-to-ambient thermal resistance 184.2 °C/W

RθJC(top) Junction-to-case (top) thermal resistance 30.6 °C/W

RθJB Junction-to-board thermal resistance 86.4 °C/W

ΨJT Junction-to-top characterization parameter 13.4 °C/W

ΨJB Junction-to-board characterization parameter 86.1 °C/W

RθJC(bot) Junction-to-case (bottom) thermal resistance N/A °C/W

(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application

report.

7.5 Electrical Characteristics

At 1.7 V ≤ VDD ≤ 5.5 V, CT = MR = Open, RESET Voltage (VRESET) = 10 kΩ to VDD, RESET load = 10 pF, and over the

operating free-air temperature range of – 40°C to 125°C, unless otherwise noted. Typical values are at TJ = 25°C, typical

conditions at VDD = 3.3 V.

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

VDD Supply Voltage 1.7 5.5 V

UVLO Under Voltage Lockout(3) VDD falling below 1.7 V 1.2 1.7 V

VPOR Power on reset voltage(2) VOL(max) = 0.25 V, IOUT = 15 µA 1 V

VIT+(OV) Positive- going threshold accuracy -0.7 ±0.25 0.7 %

VIT-(UV) Negative-going threshold accuracy -0.7 ±0.25 0.7 %

VHYS Hysteresis Voltage(1) 0.3 0.55 0.8 %

VIT+(OV) Positive- going threshold accuracy VIT < 800 mV -1 1 %

VIT-(UV) Negative-going threshold accuracy VIT < 800 mV -1 1 %

VHYS Hysteresis Voltage(1) VIT < 800 mV 0.2 0.7 %

IDD Supply current VDD ≤ 5.5 V 4.5 7 µA

ISENSE Input current, SENSE pin VSENSE = 5 V 1 1.5 µA

VOL Low level output voltage

VDD = 1.7 V, IOUT = 0.4 mA 250 mV

VDD = 2 V, IOUT = 3 mA 250 mV

VDD = 5 V, IOUT = 5 mA 250 mV

ILKG Open drain output leakage current VDD = VRESET = 5.5 V 300 nA

VMR_L MR logic low input 0.3 V

VMR_H MR logic high input 1.4 V

VCT_H High level CT pin voltage 1.4 V

RMR Manual reset Internal pullup resistance 100 KΩ

ICT CT pin charge current 337 375 413 nA

VCT CT pin comparator threshold voltage(4) 1.133 1.15 1.167 V

(1) Hysteresis is with respect of the tripoint (VIT-(UV), VIT+(OV)).

(2) VPOR is the minimum VDD voltage level for a controlled output state.

(3) RESET pin is driven low when VDD falls below UVLO.

(4) VCT voltage refers to the comparator threshold voltage that measures the voltage level of the external capacitor at CT pin.

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7.6 Timing Requirements

At 1.7 V ≤ VDD ≤ 5.5 V, CT = MR = Open, RESET Voltage (VRESET) = 10 kΩ to VDD, RESET load = 10 pF, and over the

operating free-air temperature range of – 40°C to 125°C, unless otherwise noted. Typical values are at TJ = 25°C, typical

conditions at VDD = 3.3 V.

PARAMETER TEST

CONDITIONS MIN NOM MAX UNIT

tDReset time delay, TPS3703A, TPS3703E CT = Open 7 10 13 ms

tDReset time delay, TPS3703A, TPS3703E CT = 10 kΩ to VDD 140 200 260 ms

tDReset time delay, TPS3703B, TPS3703F CT = Open 0.7 1 1.3 ms

tDReset time delay, TPS3703B, TPS3703F CT = 10 kΩ to VDD 14 20 26 ms

tDReset time delay, TPS3703C, TPS3703G CT = Open 3.5 5 6.5 ms

tDReset time delay, TPS3703C, TPS3703G CT = 10 kΩ to VDD 70 100 130 ms

tDReset time delay, TPS3703D, TPS3703H CT = 10 kΩ to VDD

CT = Open 50 µs

tPD Propagation detect delay(1) (2) 15 30 µs

tROutput rise time(1) (3) 2.2 µs

tFOutput fall time(1) (3) 0.2 µs

tSD Startup delay(4) 300 µs

tGI (VIT-) Glitch Immunity undervoltage VIT-(UV), 5% Overdrive(1) 3.5 µs

tGI (VIT+) Glitch Immunity overvoltage VIT+(OV), 5% Overdrive(1) 3.5 µs

tGI (MR) Glitch Immunity MR pin 25 ns

tPD (MR) Propagation delay from MR low to assert RESET 500 ns

tMR_W MR pin pulse width duration to assert RESET 1 µs

tD (MR) MR reset time delay tDms

(1) 5% Overdrive from threshold. Overdrive % = [VSENSE - VIT] / VIT; Where VIT stands for VIT-(UV) or VIT+(OV)

(2) tPD measured from threhold trip point (VIT-(UV) or VIT+(OV)) to RESET VOL voltage

(3) Output transitions from VOL to 90% for rise times and 90% to VOL for fall times.

(4) During the power-on sequence, VDD must be at or above VDD (MIN) for at least tSD + tD before the output is in the correct state.

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7.7 Timing Diagrams

Tolerance[-3% to -7%] Tolerance[+3% to +7%]

[ -1.5% = -0.7%-0.8%) ] 0.5%

[ -1.0% = -0.7%-0.3%) ]

[ -1.25% = -0.7%-0.55%) ]

VIT+(OV)

[0.55%]

VIT+(OV) - VHYS

[-0.8%]

[-0.3%]

[-0.55%] Hys band for VIT+(OV)

[0.7%]

[0.55%] [0.55%]

[ -0.1% = 0.7%-0.8%) ]

0.5%

[ 0.4% = 0.7%-0.3%) ]

[ 0.15% = 0.7%-0.55%) ]

Overdrive[2.5%] above VIT+(OV)

[0.25%]

[-0.25%]

[0.55%]

Hys band for VIT-(UV)

VIT-(UV) [ 0.1% = -0.7%+0.8%) ]

[ -0.4% = -0.7%+0.3% ]

[ -0.15% = -0.7%+0.55%) ]

[0.8%]

[0.3%]

[0.55%]

[ 1.0% = 0.7%+0.3%) ]

[ 1.25% = 0.7%+0.55%) ]

Overdrive [2.5%] below VIT-(UV)

VIT-(UV) + VHYS

0.5%

[0.55%]

[0.7%]

Figure 7-1. Voltage Threshold and Hysteresis Accuracy

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VIT

Hysteresis

tD tPD

Undefined

tPD

tSD

VPOR

UVLO

VDD(MIN)

VDD

SENSE

VIT+(OV)

VIT+(OV) - VHYS

VIT-(UV) + VHYS

VIT-(UV)

RESET

Figure 7-2. SENSE Timing Diagram

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7.8 Typical Characteristics

At TJ = 25°C, VDD = 3.3 V, and RPU = 10 kΩ, unless otherwise noted.

Temperature (qC)

Accuracy (%)

-50 -25 0 25 50 75 100 125

-0.2

-0.15

-0.1

-0.05

0.05

0.1

0.15

0.2

D001

0.8 V

1.2 V

1.8 V

3.3 V

5.0 V

Tested across multiple voltage options

Figure 7-3. Undervoltage Accuracy vs Temperature

Temperature (qC)

Accuracy (%)

-50 -25 0 25 50 75 100 125

-0.2

-0.15

-0.1

-0.05

0.05

0.1

0.15

0.2

D002

0.8 V

1.2 V

1.8 V

3.3 V

5.0 V

Tested across multiple voltage options

Figure 7-4. Overvoltage Accuracy vs Temperature

VIT-(UV) Accuracy (%)

Frequency (%)

-0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4

D003

Sample Size of 100 TPS3703A7125 units

Figure 7-5. Undervoltage Accuracy Distribution

VIT+(OV) Accuracy (%)

Frequency (%)

-0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4

D004

Sample Size of 100 TPS3703A7125 units

Figure 7-6. Overvoltage Accuracy Distribution

Temperature (qC)

Accuracy (%)

-50 -25 0 25 50 75 100 125

0.5

0.52

0.54

0.56

0.58

0.6

D005

0.8 V

1.2 V

1.8 V

3.3 V

5.0 V

Tested across multiple voltage options

Figure 7-7. Undervoltage Hysteresis Voltage Accuracy vs

Temperature

Temperature (qC)

Accuracy (%)

-50 -25 0 25 50 75 100 125

0.5

0.52

0.54

0.56

0.58

0.6

D006

0.8 V

1.2 V

1.8 V

3.3 V

5.0 V

Tested across multiple voltage options

Figure 7-8. Overvoltage Hysteresis Voltage Accuracy vs

Temperature

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