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Texas Instruments LP3470IM5-3.65/NOPB
- Part No.:
- LP3470IM5-3.65/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP3470IM5-3.65/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,415
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Product details
Overview
LP3470IM5-3.65/NOPB from Texas Instruments is a micropower voltage supervisor IC with 3.65 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 power rails in battery-powered systems to ensure reliable power-on-reset and brownout protection.
For engineers reviewing the LP3470IM5-3.65/NOPB datasheet, LP3470IM5-3.65/NOPB pinout, LP3470IM5-3.65/NOPB application, or LP3470IM5-3.65/NOPB equivalent, key selection criteria include reset threshold accuracy over temperature, quiescent current (16 µA typical), SOT-23-5 package compatibility, and immunity to short VCC transients.
Technical Context
The LP3470IM5-3.65/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 includes built-in delay timing controlled by an external capacitor on the SRT pin.
It operates across –40°C to +85°C with guaranteed reset validity down to 0.5 V supply and supports pullup resistor values from 0.68 kΩ to 68 kΩ. The device is immune to sub-100 ns negative-going VCC transients up to 200 mV below VRTH.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset threshold | 3.65 V ±1% over –40°C to +85°C - ensures precise power-rail monitoring without calibration. |
| Quiescent current | 16 µA typical at 4.5 V - enables multi-year battery life in portable equipment. |
| Operating voltage range | 0.5 V to 5.5 V - guarantees reset assertion even during deep brownout or ultra-low-power wake-up. |
| Reset output type | Open-drain, active-low - allows wired-OR configuration and flexible voltage-level translation. |
| Hysteresis | 35 mV typical - prevents chatter during slow-rising or noisy supply transitions. |
| VCC to reset delay | 100 µs typical - provides fast response to supply collapse while rejecting high-frequency noise. |
| Reset time-out period | Programmable via external capacitor (tRP = 2000 × C1, C1 in µF, tRP in ms) - enables system-specific POR timing without firmware dependency. |
Pinout & Package
LP3470IM5-3.65/NOPB uses a 5-pin SOT-23 (DBV) package with 1.60 mm × 2.90 mm body size, JEDEC-standard footprint, and moisture sensitivity level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SRT) | Reset time-out programming input | Connect external capacitor to ground to set reset hold time; floating disables delay. |
| 2 (GND) | Ground reference | Primary return path for internal reference and comparator; must be low-impedance. |
| 3 (VCC1) | Internal supply tie | Internally connected to VCC (Pin 4); must be externally shorted to Pin 4 per datasheet. |
| 4 (VCC) | Supply voltage and monitor input | Monitored rail input; powers internal circuitry and defines reset threshold reference point. |
| 5 (Reset) | Open-drain reset output | Active-low signal asserted when VCC < 3.65 V; requires external pullup to system VCC or compatible rail. |
Key Features
| Feature | Design Value |
|---|---|
| ±1% reset threshold accuracy | Maintains tight supervision window across full industrial temperature range, eliminating need for margin-based design. |
| Programmable reset time-out | Enables precise, capacitor-tuned POR duration (e.g., 2 ms with 1 nF) without MCU intervention or additional components. |
| 0.5 V minimum operating voltage | Guarantees reset assertion during ultra-low-voltage brownout, supporting energy-harvesting and coin-cell applications. |
| 16 µA typical quiescent current | Reduces standby power impact in always-on systems - critical for >5-year battery life in IoT endpoints. |
| Immunity to short VCC transients | Rejects glitches ≤100 ns wide and ≤200 mV amplitude, preventing false resets in electrically noisy environments. |
Applications
| Microprocessor Power Monitoring | Portable Medical Devices |
|---|---|
Use Scenario: Ensuring clean boot sequence for ARM Cortex-M microcontrollers in handheld diagnostic tools. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset until VCC stabilizes above 3.65 V and holds for programmable delay. Use Value: Prevents corrupted register initialization and flash write errors during unstable power-up, improving field reliability. | Use Scenario: Supervising lithium-polymer battery-powered glucose meters with strict low-power requirements. IC Role / Device Role / Timing Role: Monitoring main 3.3 V rail and triggering reset if voltage sags below 3.65 V during pulse-load events. Use Value: Enables deterministic recovery from brownout without MCU firmware involvement, meeting IEC 60601-1 safety timing constraints. |
| Industrial PLC I/O Modules | Smart Energy Meters |
Use Scenario: Securing FPGA configuration integrity during 24 V DC-to-3.3 V conversion in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Providing reset signal synchronized to regulated 3.3 V rail with 200 ms hold time (via 100 nF SRT cap). Use Value: Eliminates metastability in FPGA startup sequence caused by marginal supply rise time, reducing commissioning failures. | Use Scenario: Supervising backup supercapacitor charging circuit in AMI meters during mains failure. IC Role / Device Role / Timing Role: Detecting drop below 3.65 V on primary rail and holding reset until backup source engages and stabilizes. Use Value: Guarantees atomic state save before shutdown, preserving metering data integrity across power interruptions. |
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; 350 ms min factory-programmed delay; 1.6 µA IQ | Lacks programmable delay and higher threshold; better for ultra-low-IQ designs where 3.3 V match is acceptable | Select when fixed delay and lower quiescent current outweigh need for 3.65 V threshold and capacitor tuning. |
| MAX6326UT37D3+T | 3.65 V threshold; 140 ms min factory-programmed delay; 2.5 µA IQ; push-pull output | Push-pull output eliminates external pullup; no SRT pin - delay not user-adjustable | Choose when board space is constrained and push-pull drive simplifies layout, accepting fixed timing. |
Compared with TPS3808G33DBVR and MAX6326UT37D3+T, the LP3470IM5-3.65/NOPB uniquely combines factory-trimmed 3.65 V accuracy, capacitor-programmable delay, and open-drain flexibility - making it optimal for designs requiring both precise threshold matching and adaptive POR timing.
Availability
LP3470IM5-3.65/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 lifecycle support.
Supply support for LP3470IM5-3.65/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 interface solutions.
The LP3470IM5-3.65/NOPB belongs to TI's voltage supervisor product line, designed specifically for high-accuracy, low-power power-on-reset and brownout detection in resource-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of the LP3470IM5-3.65/NOPB?
The LP3470IM5-3.65/NOPB has a factory-programmed reset threshold of 3.65 V with ±1% accuracy over the full operating temperature range of –40°C to +85°C. This value is trimmed during production and specified in the Electrical Characteristics table under VRTH parameter, ensuring precise supervision without external calibration.
How do I configure the reset time-out period for the LP3470IM5-3.65/NOPB?
To configure the reset time-out period for the LP3470IM5-3.65/NOPB, connect a ceramic capacitor between Pin 1 (SRT) and GND. The delay follows tRP (ms) = 2000 × C1 (µF); for example, a 100 nF capacitor yields ~200 ms. Leaving SRT floating disables the delay, causing Reset to deassert immediately after VCC rises above 3.65 V.
Does the LP3470IM5-3.65/NOPB require an external pullup resistor on the Reset pin?
Yes, the LP3470IM5-3.65/NOPB features an open-drain Reset output and requires an external pullup resistor to a valid logic-high voltage (typically VCC). Recommended values range from 0.68 kΩ to 68 kΩ; 20 kΩ is typical. This resistor ensures proper logic-high level when Reset is inactive and limits sink current during assertion.
Can the LP3470IM5-3.65/NOPB operate reliably below 1 V supply voltage?
Yes, the LP3470IM5-3.65/NOPB guarantees reset assertion functionality down to VCC = 0.5 V, as confirmed in the Recommended Operating Conditions table. This capability ensures robust brownout detection in ultra-low-voltage scenarios such as energy-harvesting systems or deep-sleep wake-up sequences.
What package type and footprint does the LP3470IM5-3.65/NOPB use?
The LP3470IM5-3.65/NOPB uses a 5-pin SOT-23 (DBV) package with nominal dimensions of 1.60 mm × 2.90 mm. It conforms to JEDEC MO-178AB standard, has a pin pitch of 0.95 mm, and is compatible with standard SOT-23 pick-and-place and reflow processes, including MSL Level-1 handling.
LP3470IM5-3.65/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:
- 3.65V
- 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
LP3470IM5-3.65/NOPB FAQ
1.How can I place an order for LP3470IM5-3.65/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3470IM5-3.65/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 LP3470IM5-3.65/NOPB reliable?
The price and inventory of LP3470IM5-3.65/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3470IM5-3.65/NOPB is usually 5 days.
3.What payment methods are accepted for LP3470IM5-3.65/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470IM5-3.65/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3470IM5-3.65/NOPB?
LP3470IM5-3.65/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3470IM5-3.65/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 LP3470IM5-3.65/NOPB?
For technical support, including LP3470IM5-3.65/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470IM5-3.65/NOPB requirements.
6.How does Aetrix verify that LP3470IM5-3.65/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3470IM5-3.65/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 LP3470IM5-3.65/NOPB meets industry standards.
7.What is the process for return or replacement of LP3470IM5-3.65/NOPB?
All LP3470IM5-3.65/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3470IM5-3.65/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 LP3470IM5-3.65/NOPB part is unused and in its original packaging.
Return procedure for LP3470IM5-3.65/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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