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Texas Instruments LP3470M5X-2.93/NOPB
- Part No.:
- LP3470M5X-2.93/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP3470M5X-2.93/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,697
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Product details
Overview
LP3470M5X-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 - used for power-on-reset (POR) and brownout protection in microprocessor systems.
For engineers reviewing the LP3470M5X-2.93/NOPB datasheet, LP3470M5X-2.93/NOPB pinout, LP3470M5X-2.93/NOPB application, or LP3470M5X-2.93/NOPB equivalent, this page delivers verified specifications, SOT-23-5 pin functions, real-world timing behavior, and validated alternative options for critical µP supply monitoring.
Technical Context
The LP3470M5X-2.93/NOPB implements a precision bandgap reference and comparator-based supervision architecture with built-in hysteresis (15–65 mV). Its reset assertion is triggered when VCC falls below 2.93 V and remains asserted for a user-programmable delay (tRP = 2000 × C1, where C1 in µF yields tRP in ms) after VCC recovers above threshold.
It features an open-drain Reset output requiring external pullup (0.68–68 kΩ), operates across 0°C to 70°C ambient (commercial grade), draws only 16 µA typical quiescent current, and rejects short VCC transients due to internal glitch immunity design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93 V ±1% over temperature - ensures reliable POR at precise supply level without calibration. |
| Quiescent Current | 16 µA typical - enables multi-year battery life in portable equipment. |
| Operating Voltage Range | 0.5 V to 5.5 V - guarantees reset validity even during deep brownout or ultra-low-power wake-up. |
| Reset Output Type | Open-drain, active-low - allows wired-OR configuration and flexible logic-level interfacing. |
| Reset Timeout Control | Externally programmable via capacitor on SRT pin (tRP = 2000 × C1) - supports 1 ms to seconds-scale delays without firmware. |
| Hysteresis Voltage | 15–65 mV - prevents chatter during slow-rising/falling VCC transitions near threshold. |
| VCC to Reset Delay | 100–300 µs - provides fast fault response while avoiding noise-induced false triggers. |
Pinout & Package
LP3470M5X-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 timeout programming input | Connect external capacitor to GND; sets tRP = 2000 × C1 (C1 in µF → tRP in ms); leave floating for minimum 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; reset asserts when VCC drops below 2.93 V; valid operation down to 0.5 V. |
| 5 - Reset | Open-drain reset output | Active-low signal; requires external pullup resistor (typ. 20 kΩ); sinks up to 10 mA. |
Key Features
| Feature | Design Value |
|---|---|
| ±1% reset threshold accuracy | Guarantees deterministic power-on sequencing without trimming or calibration across –20°C to 85°C. |
| Programmable reset timeout | Enables system-specific POR hold times (e.g., 2 ms with 1 nF) without firmware intervention or additional logic. |
| Immunity to short VCC transients | Rejects sub-microsecond negative glitches, eliminating false resets in noisy or switching-power environments. |
| Low 16 µA quiescent current | Minimizes standby power draw - critical for battery-backed real-time clocks and IoT edge nodes. |
| Valid reset down to 0.5 V VCC | Ensures controlled shutdown and recovery during deep brownout, preventing undefined µP states. |
Applications
| Microprocessor Power Monitoring | Portable Medical Devices |
|---|---|
|
Use Scenario: Monitoring 3.3 V supply rail powering an ARM Cortex-M4 MCU during cold-start and battery depletion. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset until VCC stabilizes above 2.93 V and holds for 100 ms (C1 = 0.05 µF). Use Value: Prevents illegal instruction execution and memory corruption by enforcing minimum valid supply before release from reset. |
Use Scenario: Ensuring safe boot of a glucose meter's low-power sensor interface powered by a single Li-ion cell. IC Role / Device Role / Timing Role: Brownout detector triggering controlled shutdown when cell voltage drops below 2.93 V during discharge. Use Value: Eliminates erratic sensor readings and flash write corruption by guaranteeing clean reset before voltage collapse. |
| Industrial PLC I/O Modules | Smart Energy Meters |
|
Use Scenario: Supervising 5 V auxiliary rail feeding isolated CAN transceivers and analog front-end in a DIN-rail controller. IC Role / Device Role / Timing Role: Dual-role supervisor - POR initiator at power-up and brownout responder during AC line sags. Use Value: Maintains deterministic state machine behavior and avoids bus lockup by synchronizing reset with supply integrity. |
Use Scenario: Validating 3.3 V DC-DC output supplying metrology ASIC and secure bootloader in a Class 0.5S electricity meter. IC Role / Device Role / Timing Role: Precision threshold detector (2.93 V) with 200 ms timeout (C1 = 0.1 µF) to meet IEC 62053-21 reset timing requirements. Use Value: Meets regulatory reset consistency mandates while minimizing false trips from transient grid noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Fixed 3.3 V threshold (±0.5%), 35 µA IQ, 200 ms factory-programmed delay | Lacks external timeout adjustability; tighter threshold tolerance but no capacitor-based tuning | Choose when fixed delay and higher accuracy outweigh need for programmability. |
| MAX6326UT29D3+T | 2.93 V threshold (±1.5%), 1.6 µA IQ, 1.13 s min timeout, SOT-23-5 | Lower power but longer minimum delay; no external capacitor option; different hysteresis profile | Prefer for ultra-low-power, long-hold applications where 1.13 s minimum delay is acceptable. |
Compared with LP3470M5X-2.93/NOPB, TPS3808G33DBVR offers superior threshold accuracy but sacrifices design flexibility, while MAX6326UT29D3+T reduces current draw by 90% yet locks delay to a fixed minimum - making LP3470M5X-2.93/NOPB optimal for adjustable, low-cost, mid-power POR where capacitor tuning is essential.
Availability
LP3470M5X-2.93/NOPB is available at Aetrix Electronics and suitable for microprocessor power monitoring, portable medical devices, industrial PLC I/O modules, and smart energy meters requiring stable component supply and long-term manufacturability.
Supply support for LP3470M5X-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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, precision, and power efficiency.
The LP3470M5X-2.93/NOPB belongs to TI's voltage supervisor product line, engineered for robust power-on-reset and brownout protection in cost-sensitive, space-constrained digital systems.
FAQ
What is the exact reset threshold voltage of LP3470M5X-2.93/NOPB?
The LP3470M5X-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), ensuring consistent power-on behavior without external calibration.
How do I set the reset timeout period for LP3470M5X-2.93/NOPB?
Set the reset timeout by connecting a capacitor (C1) between the SRT pin (Pin 1) and GND. The timeout tRP in milliseconds equals 2000 × C1, where C1 is in microfarads - e.g., 100 nF yields 200 ms. Leave SRT floating for minimal delay.
Does LP3470M5X-2.93/NOPB require an external pullup resistor on the Reset pin?
Yes - the Reset pin is open-drain, so an external pullup resistor (0.68–68 kΩ, typically 20 kΩ) to VCC is mandatory to establish a valid high logic level when the output is not asserted.
Can LP3470M5X-2.93/NOPB operate with supply voltages below 1 V?
Yes - LP3470M5X-2.93/NOPB guarantees valid reset assertion and release down to VCC = 0.5 V, enabling reliable operation during deep brownout conditions and ultra-low-voltage wake-up sequences.
What is the quiescent current consumption of LP3470M5X-2.93/NOPB?
LP3470M5X-2.93/NOPB draws 16 µA typical quiescent current at 25°C and up to 30 µA across –20°C to 85°C, making it suitable for battery-powered applications requiring multi-year operational life.
LP3470M5X-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
LP3470M5X-2.93/NOPB FAQ
1.How can I place an order for LP3470M5X-2.93/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3470M5X-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 LP3470M5X-2.93/NOPB reliable?
The price and inventory of LP3470M5X-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 LP3470M5X-2.93/NOPB is usually 5 days.
3.What payment methods are accepted for LP3470M5X-2.93/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470M5X-2.93/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3470M5X-2.93/NOPB?
LP3470M5X-2.93/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3470M5X-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 LP3470M5X-2.93/NOPB?
For technical support, including LP3470M5X-2.93/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470M5X-2.93/NOPB requirements.
6.How does Aetrix verify that LP3470M5X-2.93/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3470M5X-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 LP3470M5X-2.93/NOPB meets industry standards.
7.What is the process for return or replacement of LP3470M5X-2.93/NOPB?
All LP3470M5X-2.93/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3470M5X-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 LP3470M5X-2.93/NOPB part is unused and in its original packaging.
Return procedure for LP3470M5X-2.93/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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