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Texas Instruments LP3470IM5-2.93/NOPB
- Part No.:
- LP3470IM5-2.93/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP3470IM5-2.93/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,278
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Product details
Overview
LP3470IM5-2.93/NOPB from Texas Instruments is a micropower voltage supervisor IC with 2.93 V ±1% reset threshold, programmable reset timeout 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 LP3470IM5-2.93/NOPB datasheet, LP3470IM5-2.93/NOPB pinout, LP3470IM5-2.93/NOPB application, or LP3470IM5-2.93/NOPB equivalent, key selection criteria include reset threshold accuracy over temperature, quiescent current (16 µA typical), immunity to short VCC transients, and compatibility with standard SOT-23 PCB footprints.
Technical Context
The LP3470IM5-2.93/NOPB implements a precision bandgap-based voltage reference with hysteresis (35 mV typical) and a comparator-driven open-drain output stage. Its reset assertion logic is triggered when VCC falls below 2.93 V ±1%, and reset remains active for a user-programmable delay (tRP = 2000 × C1, where C1 in µF yields tRP in ms) after VCC recovers above threshold.
It operates across –40°C to +85°C, draws only 30 µA maximum supply current over temperature, and maintains valid reset output down to 0.5 V supply - enabling supervision of deeply discharged battery rails and low-voltage logic domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93 V ±1% over –40°C to +85°C - ensures precise POR timing without calibration. |
| Quiescent Current | 16 µA typical at 4.5 V - enables multi-year battery life in portable equipment. |
| Minimum Operating VCC | 0.5 V - guarantees reset validity during deep brownout or battery depletion. |
| Reset Output Type | Open-drain, active-low - allows wired-OR configuration and flexible pullup to any logic rail. |
| Reset Timeout Control | Externally programmable via capacitor on SRT pin (tRP = 2000 × C1) - supports 1 ms to seconds-scale delays without firmware. |
| Hysteresis Voltage | 35 mV typical - prevents chatter during slow-rising or noisy supply transitions. |
| VCC Transient Immunity | Immune to short negative-going VCC glitches - eliminates false resets from switching noise or ESD coupling. |
Pinout & Package
LP3470IM5-2.93/NOPB is housed in a 5-pin SOT-23 (DBV) package measuring 1.60 mm × 2.90 mm, with moisture sensitivity level (MSL) 1 and lead finish Sn (matte tin).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SRT | Reset timeout programming input | Connect external capacitor to GND to set tRP; floating disables timeout delay. |
| 2 - GND | Ground reference | Primary return path for internal circuitry and reset output sink current. |
| 3 - VCC1 | Internal supply tie | Must be connected directly to VCC (Pin 4); no external connection required beyond that bond. |
| 4 - VCC | Supply voltage and monitor input | Monitored rail; powers device and sets reset trigger point at 2.93 V threshold. |
| 5 - Reset | Open-drain reset output | Active-low signal; requires external pullup resistor (0.68–68 kΩ) to define logic-high level. |
Key Features
| Feature | Design Value |
|---|---|
| ±1% reset threshold accuracy over temperature | Eliminates need for system-level recalibration across industrial temperature range. |
| Programmable reset timeout (1 ms to >1 s) | Enables single BOM part to support diverse POR timing requirements without firmware changes. |
| 0.5 V minimum operating voltage | Permits supervision of Li-ion cells down to ~2.5 V pack voltage with appropriate divider. |
| 16 µA typical quiescent current | Reduces standby power impact in always-on monitoring applications such as IoT edge nodes. |
| Open-drain output with 4 mA sink capability | Supports direct interface to 1.8 V, 3.3 V, or 5 V logic families using appropriate pullup voltage. |
Applications
| Microprocessor Power Monitoring | Portable Medical Devices |
|---|---|
|
Use Scenario: Ensuring clean boot sequence for ARM Cortex-M microcontrollers in handheld diagnostic tools powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset until VCC stabilizes above 2.93 V and holds for programmable delay. Use Value: Prevents corrupted firmware execution during battery cold-start or partial discharge recovery. |
Use Scenario: Supervising power rails in wearable ECG monitors requiring ultra-low-power operation and reliable wake-from-sleep behavior. IC Role / Device Role / Timing Role: Micropower reset generator with sub-µA sleep current and guaranteed reset assertion below 2.93 V. Use Value: Extends battery runtime while ensuring deterministic initialization after power interruption. |
| Industrial PLC I/O Modules | Smart Sensor Nodes |
|
Use Scenario: Monitoring 3.3 V auxiliary supply in DIN-rail mounted I/O modules exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Precision voltage supervisor with ±1% threshold stability from –40°C to +85°C. Use Value: Guarantees consistent reset timing across environmental stress without derating or margining. |
Use Scenario: Enabling robust power sequencing in battery-operated environmental sensors deployed in remote locations. IC Role / Device Role / Timing Role: Low-voltage supervisor asserting reset down to 0.5 V supply to handle end-of-life battery conditions. Use Value: Avoids undefined MCU state during final battery discharge phase, improving field reliability. |
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; 360 ms factory-programmed delay; 2.9 µA IQ | Lacks adjustable timeout and higher threshold - unsuitable for 2.93 V rail monitoring | Select only if fixed 1.2 V supervision and minimal IQ are primary requirements. |
| MAX6326UT29D3+T | 2.93 V threshold; 200 ms fixed delay; 1.6 µA IQ; SC70-5 package | Smaller footprint but non-programmable delay and lower max sink current (2 mA) | Prefer when board space is critical and fixed delay suffices; verify pullup compatibility. |
Compared with LP3470IM5-2.93/NOPB, TPS3808G12DBVR offers lower quiescent current but cannot supervise 2.93 V rails, while MAX6326UT29D3+T matches the threshold and fits tighter layouts but sacrifices timeout flexibility and drive strength - making LP3470IM5-2.93/NOPB optimal for designs needing field-adjustable reset hold time.
Availability
LP3470IM5-2.93/NOPB is available at Aetrix Electronics and suitable for microprocessor power monitoring, portable medical devices, industrial PLC I/O modules, and smart sensor nodes requiring stable component supply and long-term manufacturability.
Supply support for LP3470IM5-2.93/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 company specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and high-reliability IC design.
The LP3470 family was designed for cost-sensitive, battery-powered systems requiring precise, low-power voltage supervision - targeting applications where programmable reset timing and wide-temperature accuracy are essential.
FAQ
What is the exact reset threshold voltage of the LP3470IM5-2.93/NOPB?
The LP3470IM5-2.93/NOPB has a factory-trimmed reset threshold of 2.93 V with ±1% accuracy over the full operating temperature range of –40°C to +85°C. This specification is guaranteed by production testing and applies to all units shipped under this orderable part number.
How do I configure the reset timeout period for the LP3470IM5-2.93/NOPB?
Configure the reset timeout period (tRP) 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. Leaving SRT floating disables the timeout delay, causing Reset to deassert immediately after VCC exceeds 2.93 V.
Can the LP3470IM5-2.93/NOPB operate with a supply voltage below 1 V?
Yes - the LP3470IM5-2.93/NOPB guarantees valid reset output down to VCC = 0.5 V, and its internal circuitry remains functional across the full 0.5 V to 5.5 V operating range. This enables supervision of deeply discharged batteries or low-voltage logic domains where other supervisors fail.
What is the recommended pullup resistor value for the Reset output of the LP3470IM5-2.93/NOPB?
The recommended pullup resistor for the LP3470IM5-2.93/NOPB Reset pin is 20 kΩ, within the validated range of 0.68 kΩ to 68 kΩ. This value ensures sufficient logic-high voltage while limiting sink current to well below the 4 mA absolute maximum, supporting reliable interfacing with 1.8 V to 5 V logic families.
Is the LP3470IM5-2.93/NOPB pin-compatible with other members of the LP3470 family?
Yes - all LP3470 variants, including LP3470IM5-2.93/NOPB, share identical 5-pin SOT-23 (DBV) packaging and pinout. Swapping between threshold options (e.g., 2.63 V, 3.08 V) requires no PCB layout change, only verification that the new threshold aligns with the target supply rail's tolerance and startup profile.
LP3470IM5-2.93/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:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LP3470IM5-2.93/NOPB FAQ
1.How can I place an order for LP3470IM5-2.93/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3470IM5-2.93/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 LP3470IM5-2.93/NOPB reliable?
The price and inventory of LP3470IM5-2.93/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3470IM5-2.93/NOPB is usually 5 days.
3.What payment methods are accepted for LP3470IM5-2.93/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470IM5-2.93/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3470IM5-2.93/NOPB?
LP3470IM5-2.93/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3470IM5-2.93/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 LP3470IM5-2.93/NOPB?
For technical support, including LP3470IM5-2.93/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470IM5-2.93/NOPB requirements.
6.How does Aetrix verify that LP3470IM5-2.93/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3470IM5-2.93/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 LP3470IM5-2.93/NOPB meets industry standards.
7.What is the process for return or replacement of LP3470IM5-2.93/NOPB?
All LP3470IM5-2.93/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3470IM5-2.93/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 LP3470IM5-2.93/NOPB part is unused and in its original packaging.
Return procedure for LP3470IM5-2.93/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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