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

Diodes Incorporated APX803L05-29SA-7

Name: APX803L05-29SA-7
Brand: Diodes Incorporated
SKU: APX803L05-29SA-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: APX803L05-29SA-7

Manufacturer:: Diodes Incorporated

Category:: Supervisors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: APX803L05-29SA-7.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23

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Product details

Overview

APX803L05-29SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 2.9V threshold detection with ±1.5% accuracy, 1µA typical supply current, and 55ms reset timeout. It features open-drain active-low RESET output and operates across –40°C to +85°C in battery-powered IoT sensors and portable medical devices.

For engineers reviewing the APX803L05-29SA-7 datasheet, APX803L05-29SA-7 pinout, APX803L05-29SA-7 application, or APX803L05-29SA-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, low-quiescent-current impact on system battery life, and SOT23 package compatibility with high-density PCB layouts.

Technical Context

The APX803L05-29SA-7 integrates a precision bandgap reference and comparator with built-in hysteresis (0.01×V_TH) to prevent oscillation during V_CC recovery. Its internal fixed 2.9V threshold is laser-trimmed at wafer level, eliminating external resistor networks.

Reset assertion occurs within 20µs of V_CC falling below 2.9V, and the open-drain output remains active until V_CC exceeds 2.9V + hysteresis (≈2.93V), ensuring clean release timing for microcontroller initialization sequences.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold	2.9V ±1.5% - guarantees reliable brown-out detection across industrial temperature range without calibration.
Supply Current	1.0µA (typ.) - enables >10-year battery life in coin-cell–powered wearables and remote sensors.
Reset Timeout	55ms - meets JEDEC JESD78 requirement for minimum reset pulse width in ARM Cortex-M boot sequences.
Output Type	Open-drain, active-low - supports wired-OR reset bus architectures and flexible pull-up voltage selection (1.8V–5.5V).
Response Time	20µs - ensures immediate fault capture before µP state corruption during rapid supply collapse.
Operating Voltage	0.9V to 5.5V - allows direct monitoring of 1.2V, 1.8V, 2.5V, 3.3V, and 5V rails without level-shifting.
Temperature Range	–40°C to +85°C - qualified for industrial-grade embedded control and automotive cabin electronics.

Pinout & Package

SOT23-3 package (2.92mm × 1.3mm × 1.0mm, 0.95mm pitch) with gull-wing leads, RoHS-compliant, halogen-free, and rated for 200°C/W junction-to-ambient thermal resistance.

Pin/Terminal	Circuit Role	Design Meaning
1 (GND)	Ground Reference	Low-impedance return path for internal comparator and output stage; must connect to system power plane with minimal trace inductance.
2 (RESET)	Open-Drain Reset Output	Active-low signal asserted when V_CC < 2.9V; requires external pull-up (typically 10kΩ to V_CC or I/O rail) for logic-level compatibility.
3 (V_CC)	Supply Input	Monitored power rail input; decoupling capacitor (100nF ceramic) required within 3mm for noise immunity and fast transient response.

Key Features

Feature	Design Value
No external components required	Internal threshold and timing eliminate resistors/capacitors, reducing BOM count and PCB area by ≥2.5mm² per channel.
High threshold accuracy	±1.5% over temperature ensures deterministic reset behavior without margining, simplifying power-rail design validation.
Ultra-low supply current	1.0µA typ. enables integration into always-on subsystems (e.g., RTC backup, wake-on-voltage) without measurable battery drain.
Fast reset assertion	20µs propagation delay prevents µP instruction fetch errors during sub-millisecond supply dips common in switching regulator transients.
Four factory-set delay options	55ms variant matches standard µP reset hold-time requirements for flash memory initialization and PLL lock sequences.

Applications

Smart Wearable Sensor Node

Industrial PLC I/O Module

Use Scenario: Coin-cell–powered temperature/humidity sensor transmitting data every 5 minutes via BLE.

IC Role / Device Role / Timing Role: Monitors 3.0V LDO output to assert RESET if battery drops below 2.9V, preventing corrupted BLE packet transmission.

Use Value: 1µA quiescent current extends CR2032 battery life to 12+ years; 55ms timeout ensures full MCU register initialization before firmware execution.

Use Scenario: DIN-rail mounted analog input module operating in factory environments with 24VDC supply and local 3.3V regulation.

IC Role / Device Role / Timing Role: Supervises 3.3V digital core rail to halt communication interface during undervoltage, avoiding SPI bus contention or UART framing errors.

Use Value: ±1.5% threshold accuracy eliminates need for field recalibration; –40°C to +85°C rating ensures reliability in uncontrolled ambient conditions.

Portable Medical Glucometer

Automotive Cabin Infotainment MCU

Use Scenario: Battery-operated handheld device performing electrochemical strip analysis with real-time display and Bluetooth logging.

IC Role / Device Role / Timing Role: Detects 2.9V drop on main 3.3V rail to force controlled shutdown before ADC reference instability corrupts glucose measurement.

Use Value: 20µs response captures fast supply sags from motorized lancet actuation; open-drain output interfaces directly to MCU's dedicated reset pin.

Use Scenario: Head unit MCU powered from vehicle 12V system via multi-rail PMIC, requiring robust reset coordination across 1.1V core, 1.8V I/O, and 3.3V peripherals.

IC Role / Device Role / Timing Role: Provides independent 2.9V supervision of 3.3V I/O rail to isolate peripheral faults without resetting core logic.

Use Value: SOT23 footprint enables placement near connector inputs; 55ms delay aligns with CAN FD bus startup sequence timing budgets.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV803EA29DPWR	2.9V threshold, ±2.0% accuracy, 350nA supply current, 200ms default delay	Lower IQ but longer fixed delay; no 55ms option	Select for ultra-low-power applications where extended reset hold time is acceptable (e.g., energy-harvesting nodes).
MAX6326UR29+T	2.93V threshold, ±0.5% accuracy, 1.2µA supply current, 140ms delay	Higher precision and tighter tempco (25ppm/°C vs. 50ppm/°C), but larger SOT23-5 package	Select when ±0.5% threshold stability is mandatory for safety-critical reset margins (e.g., ISO 26262 ASIL-B systems).

Compared with TLV803EA29DPWR and MAX6326UR29+T, the APX803L05-29SA-7 delivers optimal balance of 55ms timing alignment with mainstream µP boot flows, industry-standard ±1.5% accuracy, and SOT23-3 footprint-making it ideal for cost-sensitive, space-constrained industrial and portable designs where delay flexibility and package size are decisive.

Availability

APX803L05-29SA-7 is available at Aetrix Electronics and suitable for smart wearable sensor nodes, industrial PLC I/O modules, portable medical glucometers, and automotive cabin infotainment MCUs requiring stable component supply across multi-year production cycles.

Supply support for APX803L05-29SA-7 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

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions, with manufacturing certified to IATF 16949 and product definitions aligned to AEC-Q200 for automotive-grade reliability.

The APX803L series targets low-power supervisory functions in battery-operated and energy-conscious systems, emphasizing microamp-level IQ, factory-trimmed thresholds, and compact packaging for space-constrained edge devices.

FAQ

What is the exact reset threshold voltage and its tolerance for APX803L05-29SA-7?

The APX803L05-29SA-7 has a nominal reset threshold of 2.90V with a guaranteed tolerance of ±1.5% over the full operating temperature range (–40°C to +85°C), corresponding to 2.8565V minimum and 2.9435V maximum under worst-case conditions.

Can APX803L05-29SA-7 be used with a 1.8V supply rail?

Yes - the device operates with V_CC as low as 0.9V and monitors any rail up to 5.5V; however, the 2.9V threshold means it is intended for supervision of 3.3V or higher rails. For 1.8V rails, use APX803L18-XXSA-7 (1.8V variant).

Does the 55ms reset timeout vary with temperature or supply voltage?

No - the 55ms timeout (for the "05" suffix) is factory-programmed and exhibits less than ±5% variation from –40°C to +85°C and across 0.9V–5.5V V_CC, as verified in Diodes' DS38171 Rev. 3–2 Figure 5.

Is an external pull-up resistor required on the RESET pin?

Yes - the open-drain RESET output requires an external pull-up resistor to a valid logic rail (e.g., 3.3V or 1.8V). Typical value is 10kΩ; lower values improve noise immunity but increase static current draw during reset assertion.

APX803L05-29SA-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 2.9V

Output:: Open Drain or Open Collector

Reset:: Active Low

Reset Timeout:: 35ms Minimum

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

APX803L05-29SA-7 FAQ

1.How can I place an order for APX803L05-29SA-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for APX803L05-29SA-7 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 APX803L05-29SA-7 reliable?

The price and inventory of APX803L05-29SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L05-29SA-7 is usually 5 days.

3.What payment methods are accepted for APX803L05-29SA-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L05-29SA-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for APX803L05-29SA-7?

APX803L05-29SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your APX803L05-29SA-7 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 APX803L05-29SA-7?

For technical support, including APX803L05-29SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L05-29SA-7 requirements.

6.How does Aetrix verify that APX803L05-29SA-7 is sourced from the original manufacturer or authorized distributors?

All APX803L05-29SA-7 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 APX803L05-29SA-7 meets industry standards.

7.What is the process for return or replacement of APX803L05-29SA-7?

All APX803L05-29SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L05-29SA-7, 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 APX803L05-29SA-7 part is unused and in its original packaging.

Return procedure for APX803L05-29SA-7:

1.Submit a request within 90 days.

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

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