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Diodes Incorporated APX803L05-25SA-7
- Part No.:
- APX803L05-25SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
APX803L05-25SA-7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,922
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Product details
Overview
APX803L05-25SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply rails in battery-powered and embedded digital systems. It features a fixed 2.5V detection threshold (±1.5% accuracy), 1µA typical supply current, 55ms reset timeout, open-drain active-low RESET output, and operates across –40°C to +85°C ambient range - deployed in portable instrumentation and low-power microcontroller power-up sequencing.
For engineers reviewing the APX803L05-25SA-7 datasheet, APX803L05-25SA-7 pinout, APX803L05-25SA-7 application, or APX803L05-25SA-7 equivalent, key selection considerations include threshold voltage tolerance, reset delay timing stability over temperature, open-drain sink capability (3.5mA @ 0.4V), ultra-low quiescent current impact on battery life, and SOT23 package compatibility with high-density PCB layouts.
Technical Context
The APX803L05-25SA-7 implements a precision bandgap-based voltage reference and comparator architecture to detect VCC drops below 2.5V with 1.5% initial accuracy and 50ppm/°C temperature coefficient. Its internal hysteresis (0.01×VTH) prevents oscillation during slow-rising or noisy supply transitions.
Upon detection, it asserts an active-low open-drain RESET signal with <20µs response time and holds it for a factory-programmed 55ms timeout after VCC recovers above 2.5V. No external components are required - the device integrates all sensing, timing, and output drive circuitry into a single die.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Detection Threshold | 2.5V ±1.5% - ensures reliable µP reset initiation at defined supply level without false triggers under nominal conditions |
| Supply Current | 1.0µA (typ.), 2.5µA (max.) - enables multi-year operation in coin-cell–powered devices without measurable battery drain |
| Reset Timeout | 55ms - provides sufficient hold time for microcontroller core and peripheral initialization before release |
| Output Type | Open-drain, active-low - allows wired-OR configuration, flexible pull-up voltage selection (up to 5.5V), and interface with diverse logic families |
| Response Time | <20µs - guarantees rapid fault detection during brown-out events to prevent corrupted memory writes or state corruption |
| Operating Temp | –40°C to +85°C - supports industrial and extended commercial environments without derating |
| Hysteresis | 0.01×VTH (25mV) - eliminates chatter during marginal supply recovery by requiring ~2.525V to release reset |
Pinout & Package
SOT23-3 package (2.9mm × 1.6mm × 1.1mm body, 0.95mm pitch), RoHS-compliant, lead-free, halogen-free "Green" construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | Return path for internal bias and output sink current; must be connected to system ground plane for stable threshold accuracy |
| 2 (RESET) | Open-Drain Reset Output | Active-low signal asserted when VCC < 2.5V; requires external pull-up resistor (typically 10kΩ to VCC or higher rail) to define logic HIGH level |
| 3 (VCC) | Supply Input | Monitored power rail input (0.9V to 5.5V); powers internal circuitry and defines detection reference point |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 1µA typ. - extends battery life in always-on IoT sensors and wearables beyond 10 years on CR2032 |
| Factory-trimmed threshold | 2.5V ±1.5% - eliminates need for external calibration or trimming resistors in production |
| Programmed reset delay | 55ms - matches typical µP power stabilization and clock lock times without external RC network |
| Fast response time | <20µs - prevents metastability in synchronous logic during transient undervoltage events |
| No external components | Self-contained supervision - reduces BOM count, PCB area, and qualification effort for safety-critical reset paths |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Continuous glucose monitor powered by lithium coin cell, requiring guaranteed reset on battery voltage sag below 2.5V. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET to halt ADC sampling and BLE transmission until stable supply resumes. Use Value: Prevents corrupted sensor data uploads and preserves battery charge by disabling RF subsystem during brown-out. |
Use Scenario: DIN-rail mounted I/O module with isolated 3.3V logic rail derived from 24V field supply. IC Role / Device Role / Timing Role: Monitors 3.3V rail to generate clean, debounced reset pulse for ARM Cortex-M4 MCU upon power-up or dip. Use Value: Ensures deterministic firmware boot sequence and avoids spurious I/O state changes during supply ramp. |
| Smart Home Hub Controllers | Automotive Body Control Modules (Non-AEC) |
|
Use Scenario: Wi-Fi/BLE hub with dual-supply SoC (1.1V core, 3.3V I/O), where 3.3V rail powers PMIC and peripherals. IC Role / Device Role / Timing Role: Supervises 3.3V rail to coordinate system-level reset with PMIC sequencing signals. Use Value: Eliminates race conditions between SoC core enable and peripheral readiness, improving boot reliability. |
Use Scenario: Aftermarket lighting controller using automotive-grade MCU, operating from 9–16V battery via LDO. IC Role / Device Role / Timing Role: Detects LDO output drop below 2.5V during cold-crank or load-dump transients. Use Value: Triggers graceful shutdown of LED drivers before MCU lockup, preventing thermal stress on MOSFETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EA25DBZR | 2.5V threshold, 35ms reset delay, 0.9µA supply current, SOT23-3 | Lacks hysteresis specification; tighter tempco (30ppm/°C) but no published ∆VTH vs. temp curve | Prefer for ultra-low-current designs where 35ms delay suffices and hysteresis margin is verified externally |
| MAX809SEUR+T | 2.5V threshold, 240ms reset delay, 10µA supply current, SOT23-3 | Higher ICC limits use in >5-year battery applications; longer delay suits slower µP clocks | Choose when longer reset hold time is needed for complex FPGA configuration or EEPROM write cycles |
Compared with TLV803EA25DBZR and MAX809SEUR+T, the APX803L05-25SA-7 delivers optimal balance of ultra-low ICC, precise 55ms timing, and guaranteed hysteresis - making it ideal for space-constrained, long-life embedded systems where both power efficiency and deterministic reset behavior are critical.
Availability
APX803L05-25SA-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home hub controllers, and automotive body control modules requiring stable component supply with full traceability and lifecycle support.
Supply support for APX803L05-25SA-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 design centers across Asia, Europe, and the US, serving industrial, computing, consumer, and communications markets.
The APX803L series belongs to Diodes' precision power management portfolio, engineered specifically for ultra-low-power, high-accuracy voltage supervision in battery-operated and energy-sensitive embedded systems.
FAQ
What is the absolute maximum supply voltage for APX803L05-25SA-7?
The absolute maximum VCC rating is 6.0V. Exceeding this may cause permanent damage. The recommended operating range is 0.9V to 5.5V, ensuring proper detection function and output drive integrity across temperature and process variation.
Can APX803L05-25SA-7 drive a 10kΩ pull-up to 5V?
Yes. With VOL ≤ 0.4V at ISINK = 3.5mA, the device can reliably sink ≥500µA into a 10kΩ pull-up to 5V (500µA × 10kΩ = 5V drop), maintaining valid logic LOW even under worst-case process and temperature conditions.
Is the 55ms reset timeout affected by temperature?
Yes - the datasheet shows monotonic variation from ~35ms at –40°C to ~75ms at +125°C for the APX803L05 variant. At +85°C (max operating ambient), timeout remains within 55ms ±20%, fully covering industrial timing margins.
Does APX803L05-25SA-7 require an input capacitor?
No external capacitor is required for basic operation. However, a 100nF ceramic decoupling capacitor placed near the VCC pin (as shown in the Typical Applications Circuit) is strongly recommended to suppress high-frequency noise that could affect threshold stability during fast transients.
APX803L05-25SA-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:
- 2.5V
- 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
APX803L05-25SA-7 FAQ
1.How can I place an order for APX803L05-25SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for APX803L05-25SA-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 APX803L05-25SA-7 reliable?
The price and inventory of APX803L05-25SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APX803L05-25SA-7 is usually 5 days.
3.What payment methods are accepted for APX803L05-25SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APX803L05-25SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APX803L05-25SA-7?
APX803L05-25SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APX803L05-25SA-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 APX803L05-25SA-7?
For technical support, including APX803L05-25SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APX803L05-25SA-7 requirements.
6.How does Aetrix verify that APX803L05-25SA-7 is sourced from the original manufacturer or authorized distributors?
All APX803L05-25SA-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 APX803L05-25SA-7 meets industry standards.
7.What is the process for return or replacement of APX803L05-25SA-7?
All APX803L05-25SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with APX803L05-25SA-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 APX803L05-25SA-7 part is unused and in its original packaging.
Return procedure for APX803L05-25SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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