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Texas Instruments LP3470IM5-3.08/NOPB
- Part No.:
- LP3470IM5-3.08/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP3470IM5-3.08/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,836
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Product details
Overview
LP3470IM5-3.08/NOPB from Texas Instruments is a micropower voltage supervisor IC with 3.08 V ±1% reset threshold, programmable reset timeout via external capacitor (tRP = 2000 × C1), 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 LP3470IM5-3.08/NOPB datasheet, LP3470IM5-3.08/NOPB pinout, LP3470IM5-3.08/NOPB application, or LP3470IM5-3.08/NOPB equivalent, key selection criteria include reset threshold accuracy over temperature, low quiescent current (16 µA typ), immunity to short VCC transients, and SOT-23-5 package compatibility with space-constrained embedded designs.
Technical Context
The LP3470IM5-3.08/NOPB implements a precision bandgap reference and comparator-based supervision architecture with built-in hysteresis (15–65 mV) to prevent chatter during threshold crossing. Its reset assertion logic combines voltage monitoring on VCC with a capacitor-programmable delay timer referenced to an internal 2000 ms/µF scaling factor.
It features an open-drain N-channel MOSFET output requiring an external pullup resistor (0.68–68 kΩ), supports operation across –40°C to +85°C, and maintains reset validity even as VCC drops to 0.5 V - enabling robust low-voltage system initialization and recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 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. |
| Reset Timeout Range | 1–3.5 ms (C1 = 1 nF, –20°C to +85°C) - programmable via external capacitor for flexible POR timing. |
| VCC Operating Range | 0.5 V to 5.5 V - guarantees reset assertion integrity during deep brownout and startup. |
| Hysteresis Voltage | 15–65 mV - prevents oscillation near threshold during slow-rising/falling supply transitions. |
| Output Type | Open-drain, active-low - allows wired-OR reset bus configuration and level translation. |
| ESD Rating | ±2000 V HBM - meets industrial handling requirements without additional protection circuitry. |
Pinout & Package
LP3470IM5-3.08/NOPB is housed in a 5-pin SOT-23 (DBV) package measuring 1.60 mm × 2.90 mm, optimized for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SRT | Reset timeout programming input | Connects to external capacitor (C1) to set tRP; floating disables delay (instant release). |
| 2 - GND | Ground reference | System ground return path for internal reference and comparator circuits. |
| 3 - VCC1 | Internal supply tie | Must be connected directly to VCC (Pin 4); no external function. |
| 4 - VCC | Supply voltage & monitor input | Monitored rail input; also powers internal circuitry; valid down to 0.5 V. |
| 5 - Reset | Open-drain reset output | Active-low signal asserted when VCC < VRTH; requires external pullup to VCC. |
Key Features
| Feature | Design Value |
|---|---|
| ±1% reset threshold accuracy | Eliminates need for external trimming or calibration in production systems. |
| Programmable reset timeout | Enables precise POR timing adaptation across diverse MCU boot sequences using one standard IC. |
| Immunity to short VCC transients | Rejects sub-microsecond glitches without false resets - reduces need for additional filtering. |
| Low 0.5 V reset validity floor | Ensures deterministic reset behavior during ultra-low-power wake-up and energy-harvesting scenarios. |
| 16 µA typical supply current | Minimizes standby power draw in always-on monitoring applications such as IoT edge nodes. |
Applications
| Microprocessor Power Monitoring | Portable Medical Devices |
|---|---|
|
Use Scenario: Monitoring 3.3 V supply rail of 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 3.08 V and remains valid for ≥2 ms. Use Value: Prevents illegal instruction execution and flash corruption by guaranteeing clean boot sequence under variable battery conditions. |
Use Scenario: Ensuring safe power-up of a handheld glucose meter powered by a single Li-ion cell (2.8–4.2 V range). IC Role / Device Role / Timing Role: Supervising main 3.0 V LDO output; triggers reset if voltage sags below 3.08 V during sensor activation burst. Use Value: Avoids erroneous glucose readings caused by marginal supply voltage during analog front-end sampling. |
| Industrial PLC I/O Modules | Smart Energy Meters |
|
Use Scenario: Protecting FPGA-based digital I/O controller in DIN-rail mounted PLC against brownout-induced state corruption. IC Role / Device Role / Timing Role: Providing reset hold time synchronized to 3.3 V rail recovery after AC line dip or ESD event. Use Value: Maintains deterministic I/O state during transient faults - critical for fail-safe machine control logic. |
Use Scenario: Validating 3.3 V supply to metrology ADC and real-time clock in a Class 0.5 electricity meter. IC Role / Device Role / Timing Role: Holding reset until stable 3.08 V threshold is exceeded and maintained for programmable delay (e.g., 200 ms). Use Value: Guarantees accurate energy accumulation starts only after all analog and digital blocks are fully powered and settled. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G30DBVR | Fixed 3.0 V threshold (±0.5%), 35 µA IQ, no external capacitor programming - uses internal timer. | Lacks adjustable timeout; better for cost-sensitive designs where fixed 200 ms delay suffices. | Select when board space permits slightly larger SOT-23-6 and design tolerates tighter threshold tolerance but fixed timing. |
| MAX6326LT31D2T | 3.08 V threshold (±2.5%), 1.6 µA IQ, fixed 140 ms timeout, SC70-5 package. | Ultra-low power but wider threshold tolerance; not suitable for precision 3.08 V monitoring. | Choose only for extreme battery-life requirements where ±2.5% threshold variation is acceptable. |
Compared with LP3470IM5-3.08/NOPB, TPS3808G30DBVR offers tighter threshold accuracy but sacrifices programmability, while MAX6326LT31D2T trades threshold precision for nanoamp-level quiescent current - making LP3470IM5-3.08/NOPB optimal for designs needing both 1% accuracy and field-tunable reset timing in SOT-23-5.
Availability
LP3470IM5-3.08/NOPB is available at Aetrix Electronics and suitable for microprocessor power monitoring, portable medical instrumentation, industrial PLC modules, smart energy meters, and battery-backed data loggers requiring stable component supply and long-term manufacturability.
Supply support for LP3470IM5-3.08/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 company specializing in analog and embedded processing technologies, with decades of leadership in power management and supervisory ICs.
The LP3470 product line delivers precision, low-power voltage supervision for mission-critical embedded systems - designed specifically for reliable power-on-reset and brownout detection in space- and energy-constrained applications.
FAQ
What is the exact reset threshold voltage of LP3470IM5-3.08/NOPB?
The LP3470IM5-3.08/NOPB has a factory-programmed reset threshold of 3.08 V with ±1% accuracy over the full operating temperature range of –40°C to +85°C. This value is guaranteed by production testing and applies to all units shipped under this orderable part number, as confirmed in TI's SNVS003G datasheet Section 6.5.
How do I calculate the reset timeout period for LP3470IM5-3.08/NOPB?
The reset timeout period (tRP) for LP3470IM5-3.08/NOPB is calculated using tRP (ms) = 2000 × C1 (µF), where C1 is the capacitor connected between Pin 1 (SRT) and GND. For example, a 100 nF capacitor yields a 200 ms timeout. The equation is validated across temperature and process corners per Section 7.3.1 of the datasheet.
Does LP3470IM5-3.08/NOPB require an external pullup resistor on the Reset pin?
Yes, LP3470IM5-3.08/NOPB features an open-drain Reset output and requires an external pullup resistor to VCC. The recommended value is 20 kΩ, within the supported range of 0.68 kΩ to 68 kΩ, as specified in Section 7.3.3 and Table 1 of the datasheet to ensure proper logic-high level and output current limits.
Can LP3470IM5-3.08/NOPB operate with supply voltages below 1 V?
Yes, LP3470IM5-3.08/NOPB guarantees reset assertion validity down to VCC = 0.5 V, as stated in Section 6.3 (Recommended Operating Conditions) and Section 6.5 (Electrical Characteristics). This enables use in ultra-low-voltage systems such as energy-harvesting nodes or deep-sleep wake-up circuits.
Is LP3470IM5-3.08/NOPB pin-compatible with other LP3470 variants?
Yes, all LP3470 variants-including LP3470IM5-3.08/NOPB-share identical SOT-23-5 (DBV) packaging and pinout. The only difference is the factory-set reset threshold voltage; electrical characteristics, timing behavior, and functional interface remain consistent across the family per Section 7.1 and Mechanical Data in the datasheet.
LP3470IM5-3.08/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:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LP3470IM5-3.08/NOPB FAQ
1.How can I place an order for LP3470IM5-3.08/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3470IM5-3.08/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 LP3470IM5-3.08/NOPB reliable?
The price and inventory of LP3470IM5-3.08/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3470IM5-3.08/NOPB is usually 5 days.
3.What payment methods are accepted for LP3470IM5-3.08/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470IM5-3.08/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3470IM5-3.08/NOPB?
LP3470IM5-3.08/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3470IM5-3.08/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 LP3470IM5-3.08/NOPB?
For technical support, including LP3470IM5-3.08/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470IM5-3.08/NOPB requirements.
6.How does Aetrix verify that LP3470IM5-3.08/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3470IM5-3.08/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 LP3470IM5-3.08/NOPB meets industry standards.
7.What is the process for return or replacement of LP3470IM5-3.08/NOPB?
All LP3470IM5-3.08/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3470IM5-3.08/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 LP3470IM5-3.08/NOPB part is unused and in its original packaging.
Return procedure for LP3470IM5-3.08/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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