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Texas Instruments LP3470M5-2.93/NOPB
- Part No.:
- LP3470M5-2.93/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP3470M5-2.93/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,087
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Product details
Overview
LP3470M5-2.93/NOPB from Texas Instruments is a micropower voltage supervisor IC with 2.93 V ±1% reset threshold, programmable reset time-out via external capacitor, open-drain active-low reset output, and operation down to VCC = 0.5 V. It monitors microprocessor supply rails in battery-powered systems to ensure reliable power-on-reset and brownout protection.
For engineers reviewing the LP3470M5-2.93/NOPB datasheet, LP3470M5-2.93/NOPB pinout, LP3470M5-2.93/NOPB application, or LP3470M5-2.93/NOPB equivalent, this page delivers verified electrical specs, SOT-23-5 pin mapping, real-world timing behavior, and validated alternative options for critical µP supervision in portable and industrial embedded designs.
Technical Context
The LP3470M5-2.93/NOPB implements a precision bandgap-based voltage reference with hysteresis (VHYST = 15–65 mV) and a delay timer controlled by an external capacitor on the SRT pin. Its reset assertion logic ensures immunity to short VCC transients while maintaining guaranteed low-voltage operation.
It uses an open-drain N-channel MOSFET output stage requiring an external pullup resistor (0.68–68 kΩ), supports 0.5–5.5 V supply range, and achieves 16 µA typical quiescent current - enabling multi-year battery life in always-on monitoring applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93 V ±1% over –20°C to 85°C - ensures precise power-rail monitoring without calibration. |
| Quiescent Current | 16 µA typical at 4.5 V - enables ultra-low-power operation in battery-backed systems. |
| Operating Voltage Range | 0.5 V to 5.5 V - guarantees reset validity even during deep brownout or cold-start conditions. |
| Reset Time-Out Period | Programmable via external capacitor: tRP = 2000 × C1 (C1 in µF, tRP in ms) - allows flexible POR delay tuning from sub-ms to seconds. |
| Hysteresis Voltage | 15–65 mV - prevents chatter during slow-rising/falling VCC transitions near threshold. |
| Output Type | Open-drain, active-low - compatible with mixed-voltage logic families and enables wired-OR reset bus configurations. |
| VCC to Reset Delay | 100–300 µs - provides fast response to supply collapse while avoiding noise-induced false triggers. |
Pinout & Package
LP3470M5-2.93/NOPB is housed in a 5-pin SOT-23 (DBV) package measuring 1.60 mm × 2.90 mm, optimized for space-constrained PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SRT | Reset time-out programming input | Connect external capacitor to ground to set tRP; floating disables delay - no internal pullup/pulldown. |
| 2 - GND | Ground reference | Primary return path for internal reference and output stage; must be low-impedance connection. |
| 3 - VCC1 | Internal supply tie | Must be connected directly to VCC (Pin 4); not functional as independent input - internal bonding wire connection. |
| 4 - VCC | Supply voltage and monitor input | Monitored rail; powers internal circuitry and defines reset threshold - valid down to 0.5 V. |
| 5 - Reset | Open-drain reset output | Active-low signal asserted when VCC < VRTH; requires external pullup (typ. 20 kΩ) to host VCC or logic rail. |
Key Features
| Feature | Design Value |
|---|---|
| ±1% reset threshold accuracy | Eliminates need for external trimming or system-level recalibration across temperature. |
| Programmable reset timeout | Enables precise match to µP's minimum reset pulse width requirement using standard ceramic capacitors. |
| Immunity to short VCC transients | Rejects sub-microsecond glitches up to 100 mV below VRTH - reduces false resets in noisy environments. |
| Operation down to 0.5 V VCC | Ensures deterministic reset assertion during full power collapse, including battery depletion scenarios. |
| Low 16 µA quiescent current | Extends shelf life and runtime of coin-cell or primary-battery-powered devices by >10× vs legacy supervisors. |
Applications
| Microprocessor Power-On Reset | Battery-Powered Instrumentation |
|---|---|
|
Use Scenario: Ensuring clean boot sequence for ARM Cortex-M or RISC-V microcontrollers after cold start or wake-from-hibernate. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset until VCC stabilizes above 2.93 V and holds for programmable tRP. Use Value: Prevents illegal instruction execution and memory corruption by guaranteeing minimum reset pulse width aligned to µP spec. |
Use Scenario: Maintaining system integrity in handheld test meters or portable data loggers operating from single Li-ion or alkaline cells. IC Role / Device Role / Timing Role: Monitoring declining battery voltage and triggering graceful shutdown before brownout-induced firmware crash. Use Value: Enables >2-year shelf life and eliminates field failures due to undervoltage lockout misalignment. |
| Industrial Control I/O Modules | Smart Sensor Nodes |
|
Use Scenario: Supervising 3.3 V or 5 V rails powering PLC digital I/O drivers and communication interfaces (RS-485, CAN). IC Role / Device Role / Timing Role: Providing fail-safe reset during line transients or ESD events on field wiring. Use Value: Reduces unscheduled downtime by preventing latch-up or register corruption in mission-critical control loops. |
Use Scenario: Enabling reliable wake-up and sensor initialization in LoRaWAN or NB-IoT edge nodes powered by energy harvesters or small batteries. IC Role / Device Role / Timing Role: Acting as ultra-low-power POR element that consumes <20 µA continuously while awaiting trigger event. Use Value: Achieves sub-µA average system current in sleep mode - critical for multi-year wireless node deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G12DBVR | Fixed 1.2 V threshold; 36 µA IQ; requires external resistor for delay tuning (not capacitor-based). | Not suitable for 2.93 V rail monitoring; better for low-voltage core logic supervision. | Select only if supervising sub-1.8 V domains and higher IQ is acceptable. |
| MAX6326UT29D3+ | 2.93 V threshold; 1.6 µA IQ; fixed 140 ms delay; no external component required. | Lacks programmability - inflexible for systems needing custom reset timing. | Prefer when minimizing BOM count and layout area outweighs need for adjustable tRP. |
Compared with TPS3808G12DBVR and MAX6326UT29D3+, the LP3470M5-2.93/NOPB uniquely balances precision 2.93 V threshold, capacitor-programmable delay, and ultra-low 16 µA quiescent current - making it optimal for battery-sensitive applications requiring exact reset timing alignment.
Availability
LP3470M5-2.93/NOPB is available at Aetrix Electronics and suitable for microprocessor power-on-reset, battery-powered instrumentation, and industrial control I/O modules requiring stable component supply and long-term lifecycle support.
Supply support for LP3470M5-2.93/NOPB 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 specializing in analog, embedded processing, and power management technologies, with decades of expertise in high-reliability supervisory circuits.
The LP3470 series was designed specifically for micropower voltage monitoring in space- and energy-constrained embedded systems - emphasizing accuracy, flexibility, and robustness across industrial and portable operating conditions.
FAQ
What is the reset threshold voltage of the LP3470M5-2.93/NOPB?
The LP3470M5-2.93/NOPB has a factory-programmed reset threshold of 2.93 V with ±1% accuracy over the full operating temperature range (–20°C to 85°C). This value is laser-trimmed during production and does not require external calibration. The LP3470M5-2.93/NOPB maintains this precision under varying load and supply conditions, ensuring consistent system reset behavior.
How do I configure the reset time-out period for the LP3470M5-2.93/NOPB?
The reset time-out period (tRP) of the LP3470M5-2.93/NOPB is set by connecting a capacitor between the SRT pin (Pin 1) and GND. Use the formula tRP (ms) = 2000 × C1 (µF); for example, a 100 nF capacitor yields 200 ms. No capacitor (SRT floating) disables the delay, causing Reset to deassert immediately after VCC exceeds 2.93 V. The LP3470M5-2.93/NOPB supports standard ceramic capacitors rated ≥10 V.
Does the LP3470M5-2.93/NOPB require an external pullup resistor on the Reset pin?
Yes - the LP3470M5-2.93/NOPB features an open-drain Reset output (Pin 5) and requires an external pullup resistor to a valid logic-high voltage (typically VCC or another system rail). Recommended values range from 0.68 kΩ to 68 kΩ, with 20 kΩ being typical. This ensures proper logic-high level while limiting sink current to <10 mA during reset assertion. The LP3470M5-2.93/NOPB does not include internal pullup circuitry.
Can the LP3470M5-2.93/NOPB operate with supply voltages below 1 V?
Yes - the LP3470M5-2.93/NOPB guarantees reset functionality down to VCC = 0.5 V, enabling reliable supervision during deep brownout or battery-depletion scenarios. Its internal reference and comparator remain operational across the full 0.5 V to 5.5 V range, and the Reset output remains valid (logic low) even at 0.5 V with 30 µA sink capability. This behavior is fully specified and tested, distinguishing the LP3470M5-2.93/NOPB from many competitors.
Is the LP3470M5-2.93/NOPB pin-compatible with other LP3470 variants?
Yes - all LP3470 variants, including LP3470M5-2.93/NOPB, LP3470M5-3.08/NOPB, and LP3470IM5-2.93/NOPB, share identical 5-pin SOT-23 (DBV) packaging and pinout. The only differences are reset threshold voltage and operating temperature grade (M-grade: 0°C to 0°C ambient; I-grade: –40°C to 85°C). Therefore, LP3470M5-2.93/NOPB can be substituted within the same footprint without PCB changes, provided thermal and voltage requirements align.
LP3470M5-2.93/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- -20°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LP3470M5-2.93/NOPB FAQ
1.How can I place an order for LP3470M5-2.93/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3470M5-2.93/NOPB 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 LP3470M5-2.93/NOPB reliable?
The price and inventory of LP3470M5-2.93/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3470M5-2.93/NOPB is usually 5 days.
3.What payment methods are accepted for LP3470M5-2.93/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470M5-2.93/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3470M5-2.93/NOPB?
LP3470M5-2.93/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3470M5-2.93/NOPB 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 LP3470M5-2.93/NOPB?
For technical support, including LP3470M5-2.93/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470M5-2.93/NOPB requirements.
6.How does Aetrix verify that LP3470M5-2.93/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3470M5-2.93/NOPB 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 LP3470M5-2.93/NOPB meets industry standards.
7.What is the process for return or replacement of LP3470M5-2.93/NOPB?
All LP3470M5-2.93/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3470M5-2.93/NOPB, 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 LP3470M5-2.93/NOPB part is unused and in its original packaging.
Return procedure for LP3470M5-2.93/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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