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Texas Instruments LP3470M5-3.08/NOPB
- Part No.:
- LP3470M5-3.08/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP3470M5-3.08/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,882
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Product details
Overview
LP3470M5-3.08/NOPB from Texas Instruments is a micropower voltage supervisor IC with 3.08 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 LP3470M5-3.08/NOPB datasheet, LP3470M5-3.08/NOPB pinout, LP3470M5-3.08/NOPB application, or LP3470M5-3.08/NOPB equivalent, key selection criteria include reset threshold accuracy over temperature, quiescent current (16 µA typical), SOT-23-5 package compatibility, and external capacitor–programmable delay timing.
Technical Context
The LP3470M5-3.08/NOPB implements a precision bandgap-based voltage reference with hysteresis (35 mV typical) and internal comparator to assert reset when VCC falls below 3.08 V. Its reset assertion remains active for a user-defined interval after VCC recovers, determined by an external capacitor on the SRT pin using tRP = 2000 × C1 (C1 in µF, tRP in ms).
It features immunity to short VCC transients, guaranteed reset validity down to 0.5 V supply, and operates across 0°C to 70°C ambient (commercial grade). The open-drain Reset output requires an external pullup resistor (0.68–68 kΩ), and pin VCC1 is internally tied to VCC for stable biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 V ±1% over temperature - 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 - supports valid 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 interfacing. |
| Reset Time-Out Period | Programmable via external capacitor (e.g., 2 ms with 1 nF) - eliminates fixed-delay compromises in POR timing design. |
| Hysteresis Voltage | 35 mV typical - prevents chatter during slow VCC recovery near threshold. |
| VCC to Reset Delay | 100 µs typical - provides fast response to supply collapse without false triggering on noise. |
Pinout & Package
LP3470M5-3.08/NOPB is housed in a 5-pin SOT-23 (DBV) package, 1.60 mm × 2.90 mm body size, with moisture sensitivity level (MSL) 1 and lead finish Sn (matte tin).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SRT | Reset time-out programming input | Connect external capacitor to GND; sets tRP = 2000 × C1 (µF → ms); leave floating for minimum delay. |
| 2 - GND | Ground reference | Primary return path for internal circuitry and reset output sink current. |
| 3 - VCC1 | Internal bias supply | Must be connected directly to VCC (Pin 4); not externally accessible or configurable. |
| 4 - VCC | Supply and monitored voltage input | Monitors system rail; powers internal circuitry; reset asserts when VCC < 3.08 V. |
| 5 - Reset | Open-drain reset output | Active-low signal; requires external pullup; sinks up to 4 mA; valid down to VCC = 0.5 V. |
Key Features
| Feature | Design Value |
|---|---|
| ±1% reset threshold accuracy over temperature | Eliminates need for external trimming or system-level recalibration across –20°C to 85°C. |
| Programmable reset timeout via single capacitor | Enables precise POR timing alignment with processor startup requirements without firmware or additional logic. |
| Immunity to short VCC transients | Rejects sub-microsecond negative glitches, reducing false resets in noisy power environments. |
| Low 16 µA quiescent current | Minimizes standby power draw in always-on supervisory applications such as IoT edge nodes. |
| Valid reset output down to 0.5 V VCC | Ensures deterministic system reset behavior during deep undervoltage conditions and cold-start scenarios. |
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 brownout. IC Role / Device Role / Timing Role: Voltage supervisor providing factory-trimmed 3.08 V threshold and programmable reset hold-off to meet MCU's tRST requirement. Use Value: Prevents corrupted register states or flash writes by guaranteeing reset remains asserted until VCC stabilizes above 3.08 V for ≥2 ms (configurable). |
Use Scenario: Maintaining system integrity in handheld multimeters or portable data loggers operating from coin-cell or Li-ion sources. IC Role / Device Role / Timing Role: Low-quiescent supervisor enabling >5-year shelf life while detecting end-of-battery voltage sag. Use Value: 16 µA ICC and 0.5 V operational floor allow continuous monitoring without accelerating battery drain. |
| Industrial Control Module | Network Edge Sensor Node |
|
Use Scenario: Securing safe startup of PLC I/O modules exposed to 24 V DC rail fluctuations and EMI. IC Role / Device Role / Timing Role: Immune-to-transient supervisor asserting reset during line dips or switching noise on shared power bus. Use Value: 35 mV hysteresis and glitch rejection prevent spurious resets that could disrupt fieldbus communication or actuator control. |
Use Scenario: Enabling robust wake-from-sleep behavior in LoRaWAN or NB-IoT sensor endpoints powered by energy harvesting. IC Role / Device Role / Timing Role: Micropower supervisor coordinating with ultra-low-power MCU to validate supply before RF transmission. Use Value: Programmable tRP aligns reset release with MCU's internal clock stabilization time, avoiding race conditions. |
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%), 350 nA IQ, no external capacitor delay - uses internal timer. | Lower power but less timing flexibility; better for space-constrained designs where fixed delay suffices. | Select if ultra-low IQ dominates over programmability and 3.3 V threshold is acceptable. |
| MAX6326LT31D2T | 3.08 V threshold (±1.5%), 1.6 µA IQ, fixed 200 ms delay, SOT-23-5 - no external capacitor required. | Higher threshold tolerance and fixed timing reduce BOM count but limit adaptability to varying MCU specs. | Select if production volume justifies fixed-timing simplification and 1.5% threshold error is within system margin. |
Compared with LP3470M5-3.08/NOPB, TPS3808G33DBVR offers significantly lower quiescent current but lacks programmable delay and has a higher fixed threshold; MAX6326LT31D2T provides plug-and-play timing but trades threshold accuracy and adjustability for integration simplicity.
Availability
LP3470M5-3.08/NOPB is available at Aetrix Electronics and suitable for microprocessor power-on-reset, battery-powered instrumentation, industrial control modules, and network edge sensor nodes requiring stable component supply and long-term manufacturability.
Supply support for LP3470M5-3.08/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 high-reliability components for industrial, automotive, and communications markets.
The LP3470 series was designed specifically for precision, low-power voltage supervision in resource-constrained digital systems-emphasizing accuracy, programmability, and robustness in commercial-grade applications.
FAQ
What is the exact reset threshold voltage of the LP3470M5-3.08/NOPB?
The LP3470M5-3.08/NOPB has a factory-programmed reset threshold of 3.08 V with ±1% accuracy over the full operating temperature range (–20°C to 85°C). This value is specified in the Electrical Characteristics table under VRTH and confirmed in the Mechanical, Packaging, and Orderable Information section of the TI datasheet SNVS003G.
How do I calculate the reset time-out period for the LP3470M5-3.08/NOPB?
The reset time-out period (tRP) for LP3470M5-3.08/NOPB is calculated using tRP (ms) = 2000 × C1, where C1 is the capacitance in µF connected between the SRT pin and GND. For example, a 100 nF (0.1 µF) capacitor yields a 200 ms delay. The equation is validated in Section 7.3.1 and Table 1 of the official TI datasheet.
Does the LP3470M5-3.08/NOPB require an external pullup resistor on the Reset pin?
Yes, the LP3470M5-3.08/NOPB features an open-drain Reset output and requires an external pullup resistor (0.68 kΩ to 68 kΩ) connected to VCC. A typical value of 20 kΩ is recommended per Section 7.3.3 of the datasheet to ensure proper logic-high level while limiting sink current to ≤4 mA.
Can the LP3470M5-3.08/NOPB operate with supply voltages below 1 V?
Yes, the LP3470M5-3.08/NOPB guarantees valid reset assertion down to VCC = 0.5 V, as stated in the Electrical Characteristics table (VOL test condition) and Section 3 Description. This enables reliable supervision during ultra-low-voltage brownout or energy-harvesting startup sequences.
What is the package type and footprint compatibility of the LP3470M5-3.08/NOPB?
The LP3470M5-3.08/NOPB uses a 5-pin SOT-23 (DBV) package with 1.60 mm × 2.90 mm body size and standard JEDEC MO-178AC outline. It shares footprint and solder reflow profile (MSL Level-1, 260°C peak) with other SOT-23-5 supervisors, enabling drop-in replacement in existing layouts where pin functions match.
LP3470M5-3.08/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:
- 3.08V
- 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
LP3470M5-3.08/NOPB FAQ
1.How can I place an order for LP3470M5-3.08/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3470M5-3.08/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 LP3470M5-3.08/NOPB reliable?
The price and inventory of LP3470M5-3.08/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3470M5-3.08/NOPB is usually 5 days.
3.What payment methods are accepted for LP3470M5-3.08/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470M5-3.08/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3470M5-3.08/NOPB?
LP3470M5-3.08/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3470M5-3.08/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 LP3470M5-3.08/NOPB?
For technical support, including LP3470M5-3.08/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470M5-3.08/NOPB requirements.
6.How does Aetrix verify that LP3470M5-3.08/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3470M5-3.08/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 LP3470M5-3.08/NOPB meets industry standards.
7.What is the process for return or replacement of LP3470M5-3.08/NOPB?
All LP3470M5-3.08/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3470M5-3.08/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 LP3470M5-3.08/NOPB part is unused and in its original packaging.
Return procedure for LP3470M5-3.08/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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