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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Texas Instruments TPS3803G15DCKR

Name: TPS3803G15DCKR
Brand: Texas Instruments
SKU: TPS3803G15DCKR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TPS3803G15DCKR

Manufacturer:: Texas Instruments

Category:: Supervisors

Package:: 5-TSSOP, SC-70-5, SOT-353

Datasheet:: TPS3803G15DCKR.pdf

Description:: IC SUPERVISOR 1 CHANNEL SC70-5

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Product details

Overview

TPS3803G15DCKR from Texas Instruments is a fixed-threshold voltage supervisor IC with 1.40 V detection accuracy (±1.5%), 3 µA typical supply current at 3.3 V, open-drain active-low RESET output, and operation across −40°C to +85°C - used for power-on reset supervision in low-voltage microcontroller systems.

For engineers reviewing the TPS3803G15DCKR datasheet, TPS3803G15DCKR pinout, TPS3803G15DCKR application, or TPS3803G15DCKR equivalent, key selection considerations include its SC-70 package footprint, 1.40 V fixed V_IT, power-up reset assertion below 1.0 V, hysteresis of 15 mV, and compatibility with 1.3–6 V supply rails.

Technical Context

The TPS3803G15DCKR integrates an internal 1.215 V reference and precision comparator to monitor VDD only - unlike adjustable variants (e.g., TPS3803−01) or dual-input devices (e.g., TPS3805), it has no SENSE pin functionality. Its RESET output remains asserted until VDD exceeds 1.40 V and stays above that threshold with 15 mV hysteresis.

It operates as a single-supply, single-threshold supervisory circuit with no external resistor network required. The device asserts RESET when VDD falls below V_IT or during power-up until VDD rises above 1.0 V (power-up reset voltage), then transitions to threshold monitoring mode.

Key Specifications

Parameter	Value and Actual Design Meaning
Threshold Voltage (V_IT)	1.40 V ±1.5% - precise fixed detection point for 1.5 V rail supervision
Supply Current (I_DD)	3 µA typical at VDD = 3.3 V - enables ultra-low-power battery-backed operation
Reset Output Type	Active-low open-drain - allows wired-OR configuration and flexible pull-up voltage selection
Operating Voltage Range	1.3 V to 6 V - supports supervision of 1.5 V, 1.8 V, 2.5 V, 3.3 V, and 5 V rails
Hysteresis (V_hys)	15 mV - prevents oscillation during slow-rising or noisy supply transitions
Power-Up Reset Threshold	1.0 V - ensures reliable assertion before system logic becomes active
Temperature Range	−40°C to +85°C - qualified for industrial and extended commercial environments

Pinout & Package

TPS3803G15DCKR uses a 5-pin SC-70 (DCK) package - 2.0 mm × 1.25 mm footprint, 1.1 mm max height, lead pitch 0.65 mm, RoHS-compliant NIPDAUAG finish, MSL Level-1.

Pin/Terminal	Circuit Role	Design Meaning
1 - NC	No internal connection	Unbonded pad - must be left floating or grounded per layout guidelines; not usable as signal or thermal path
2 - GND	Ground reference	Primary return path for internal reference and comparator; requires low-impedance PCB connection
3 - RESET	Active-low open-drain output	Drives low when VDD < V_IT; requires external pull-up to define logic-high level and timing
4 - VDD	Supply input & monitored rail	Both powers the IC and serves as the sole sensed voltage - no separate SENSE pin on this variant
5 - NC	No internal connection	Unbonded pad - identical functional status to Pin 1; no routing or termination required

Key Features

Feature	Design Value
Fixed 1.40 V threshold	Eliminates external resistor divider, reducing BOM count and layout area vs. adjustable supervisors
±1.5% V_IT accuracy over temperature	Ensures deterministic reset behavior across full −40°C to +85°C range without calibration
3 µA typical quiescent current	Extends battery life in portable equipment where supervisor current directly impacts standby duration
Open-drain RESET with 5 mA sink capability	Supports multi-source reset arbitration and interface to diverse logic families (e.g., 1.8 V, 3.3 V, 5 V)
15 mV built-in hysteresis	Rejects supply noise up to 15 mV peak-to-peak without requiring external RC filtering

Applications

Microcontroller Power-On Reset	Low-Voltage Battery Monitoring
Use Scenario: Ensuring clean boot sequence for ARM Cortex-M0+ MCU powered from a 1.5 V LDO. IC Role / Device Role / Timing Role: Monitors VDD rail and holds RESET low until stable 1.5 V is reached and maintained above 1.40 V. Use Value: Prevents firmware execution under brown-out conditions, eliminating corrupted register states and flash write errors.	Use Scenario: Supervising coin-cell–powered real-time clock (RTC) backup domain operating at 1.5 V. IC Role / Device Role / Timing Role: Detects falling VDD below 1.40 V and asserts RESET to halt RTC writes before supply collapse. Use Value: Guarantees data integrity during battery depletion by disabling timekeeping before voltage drops below safe write threshold.
Industrial Sensor Node Initialization	Wearables System Supervisor
Use Scenario: Power sequencing control for a 1.5 V sensor interface ASIC in a factory-floor vibration monitor. IC Role / Device Role / Timing Role: Provides reset pulse ≥140 ms after VDD crosses 1.40 V, meeting ASIC's minimum reset hold time. Use Value: Eliminates need for RC-based reset timers, improving timing repeatability and reducing component drift sensitivity.	Use Scenario: Enabling reliable wake-from-sleep recovery in a Bluetooth LE fitness tracker using a 1.5 V buck converter. IC Role / Device Role / Timing Role: Asserts RESET during sleep-mode voltage sag and releases it only after sustained 1.40 V recovery. Use Value: Avoids spurious wakeups caused by transient dips, reducing false interrupt events and conserving energy.

Microcontroller Power-On Reset

Low-Voltage Battery Monitoring

Use Scenario: Ensuring clean boot sequence for ARM Cortex-M0+ MCU powered from a 1.5 V LDO.

IC Role / Device Role / Timing Role: Monitors VDD rail and holds RESET low until stable 1.5 V is reached and maintained above 1.40 V.

Use Value: Prevents firmware execution under brown-out conditions, eliminating corrupted register states and flash write errors.

Use Scenario: Supervising coin-cell–powered real-time clock (RTC) backup domain operating at 1.5 V.

IC Role / Device Role / Timing Role: Detects falling VDD below 1.40 V and asserts RESET to halt RTC writes before supply collapse.

Use Value: Guarantees data integrity during battery depletion by disabling timekeeping before voltage drops below safe write threshold.

Industrial Sensor Node Initialization

Wearables System Supervisor

Use Scenario: Power sequencing control for a 1.5 V sensor interface ASIC in a factory-floor vibration monitor.

IC Role / Device Role / Timing Role: Provides reset pulse ≥140 ms after VDD crosses 1.40 V, meeting ASIC's minimum reset hold time.

Use Value: Eliminates need for RC-based reset timers, improving timing repeatability and reducing component drift sensitivity.

Use Scenario: Enabling reliable wake-from-sleep recovery in a Bluetooth LE fitness tracker using a 1.5 V buck converter.

IC Role / Device Role / Timing Role: Asserts RESET during sleep-mode voltage sag and releases it only after sustained 1.40 V recovery.

Use Value: Avoids spurious wakeups caused by transient dips, reducing false interrupt events and conserving energy.

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS3803-01DCKR	Adjustable threshold via external resistors (1.226 V reference); includes functional SENSE pin	Supports dual-rail monitoring (VDD + external rail); requires two resistors and PCB area	Select when flexibility to set custom thresholds or monitor secondary supplies is required
TPS3805H33DCKR	Dual-input supervisor: fixed 3.05 V VDD threshold + adjustable 1.226 V SENSE input	Designed for 3.3 V main rail + auxiliary rail supervision; not suitable for 1.5 V-only use	Choose only if supervising both 3.3 V and a second lower-voltage rail simultaneously

Compared with TPS3803-01DCKR and TPS3805H33DCKR, the TPS3803G15DCKR offers lowest BOM cost and smallest layout footprint for dedicated 1.5 V rail supervision, trading adjustability and multi-rail capability for simplicity and precision at its nominal threshold.

Availability

TPS3803G15DCKR is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, and battery-powered IoT edge devices requiring stable component supply and long-term manufacturability.

Supply support for TPS3803G15DCKR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, precision, and energy efficiency.

The TPS3803 family was designed specifically for robust, low-power supply monitoring in space-constrained processor-based systems - prioritizing threshold accuracy, minimal quiescent current, and SC-70 scalability.

FAQ

What is the exact threshold voltage of the TPS3803G15DCKR, and how tightly is it specified?

The TPS3803G15DCKR has a nominal threshold voltage (V_IT) of 1.40 V, specified with ±1.5% accuracy over the full −40°C to +85°C temperature range. This corresponds to a guaranteed range of 1.379 V to 1.421 V at any temperature within spec, enabling predictable reset behavior without calibration.

Does the TPS3803G15DCKR support monitoring a secondary voltage rail?

No - the TPS3803G15DCKR monitors only the VDD supply pin. Unlike the TPS3803−01 or TPS3805 variants, it has no functional SENSE input; pins 1 and 5 are unconnected (NC), and the internal circuitry is configured exclusively for fixed 1.40 V VDD supervision.

What is the maximum supply voltage the TPS3803G15DCKR can tolerate?

The absolute maximum supply voltage (VDD) for the TPS3803G15DCKR is +7 V, but the recommended operating range is 1.3 V to 6 V. Continuous operation at 7 V is limited to ≤1000 hours per TI's reliability guidance - sustained use above 6 V is outside specification and may impact long-term performance.

How does the reset timing behave during power-up for the TPS3803G15DCKR?

During power-up, the TPS3803G15DCKR asserts RESET when VDD rises above 0.8 V, then maintains RESET active until VDD exceeds 1.0 V (power-up reset voltage). Once above 1.0 V, it transitions to threshold monitoring and deasserts RESET only after VDD stabilizes above 1.40 V with 15 mV hysteresis.

Is the TPS3803G15DCKR pin-compatible with other devices in the TPS3803/TPS3805 family?

No - while all share the SC-70 (DCK) 5-pin package, pin functions differ: TPS3803G15DCKR assigns Pin 5 as NC, whereas TPS3803−01DCKR uses Pin 5 as SENSE and TPS3805H33DCKR uses it as active SENSE. Swapping devices without board revision will result in non-functional supervision.

TPS3803G15DCKR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 5-TSSOP, SC-70-5, SOT-353

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 1.4V

Output:: Open Drain or Open Collector

Reset:: Active Low

Reset Timeout:: 5µs Typical Propagation Delay

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-70-5

TPS3803G15DCKR FAQ

1.How can I place an order for TPS3803G15DCKR through Aetrix?

Please submit a Request for Quotation (RFQ) for TPS3803G15DCKR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TPS3803G15DCKR reliable?

The price and inventory of TPS3803G15DCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3803G15DCKR is usually 5 days.

3.What payment methods are accepted for TPS3803G15DCKR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3803G15DCKR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TPS3803G15DCKR?

TPS3803G15DCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TPS3803G15DCKR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TPS3803G15DCKR?

For technical support, including TPS3803G15DCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3803G15DCKR requirements.

6.How does Aetrix verify that TPS3803G15DCKR is sourced from the original manufacturer or authorized distributors?

All TPS3803G15DCKR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS3803G15DCKR meets industry standards.

7.What is the process for return or replacement of TPS3803G15DCKR?

All TPS3803G15DCKR units undergo pre-shipment inspection (PSI). If there is an issue with TPS3803G15DCKR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TPS3803G15DCKR part is unused and in its original packaging.

Return procedure for TPS3803G15DCKR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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