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Texas Instruments LP3470IM5-2.83/NOPB
- Part No.:
- LP3470IM5-2.83/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP3470IM5-2.83/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,739
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Product details
Overview
LP3470IM5-2.83/NOPB from Texas Instruments is a micropower voltage supervisor IC with 2.83 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 LP3470IM5-2.83/NOPB datasheet, LP3470IM5-2.83/NOPB pinout, LP3470IM5-2.83/NOPB application, or LP3470IM5-2.83/NOPB equivalent, key selection criteria include reset threshold accuracy over temperature, quiescent current (16 µA typical), immunity to short VCC transients, and compatibility with SOT-23-5 PCB footprints.
Technical Context
The LP3470IM5-2.83/NOPB implements a precision bandgap-based voltage reference with hysteresis (35 mV typical) and an internal delay timer controlled by an external capacitor on the SRT pin. Its open-drain Reset output requires an external pullup resistor (0.68–68 kΩ) and remains valid across the full operating range of VCC = 0.5 V to 5.5 V.
This device operates over –20°C to 85°C (industrial grade), features ±1% reset threshold accuracy over temperature, and provides robust transient immunity-rejecting negative-going VCC glitches up to specified amplitude/duration limits per Figure 6 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.83 V ±1% over temperature - ensures precise power-rail monitoring for 3.3 V systems with margin. |
| 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. |
| Hysteresis | 35 mV typical - prevents reset chatter near threshold during slow-rising/falling VCC transitions. |
| Reset Output Type | Open-drain, active-low - supports wired-OR reset buses and flexible voltage-level interfacing. |
| Reset Timeout Control | Externally programmable via capacitor on SRT pin (tRP = 2000 × C1, C1 in µF, tRP in ms) - enables design-specific POR timing without firmware dependency. |
| VCC to Reset Delay | 100 µs typical - provides fast response to supply collapse while avoiding noise-induced false triggers. |
Pinout & Package
LP3470IM5-2.83/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 ground to set reset hold time (tRP); floating disables timeout delay. |
| 2 - GND | Ground reference | Primary return path for internal reference and output stage; must be low-impedance. |
| 3 - VCC1 | Internal supply tie | Must be connected directly to VCC (Pin 4); no external connection or decoupling required. |
| 4 - VCC | Supply voltage and monitor input | Monitored rail; powers device and defines reset threshold; functional down to 0.5 V. |
| 5 - Reset | Open-drain reset output | Active-low signal; requires external pullup to VCC or another logic rail; sinks ≤10 mA. |
Key Features
| Feature | Design Value |
|---|---|
| ±1% reset threshold accuracy over temperature | Eliminates need for calibration or margin padding in critical 3.3 V or 2.8 V supply monitoring. |
| Programmable reset timeout using external capacitor | Enables precise, board-level tuning of power-on reset duration without changing firmware or BOM. |
| Immunity to short VCC transients | Rejects sub-microsecond negative glitches, reducing false resets in noisy industrial or automotive environments. |
| Low quiescent current (16 µA typical) | Minimizes standby power draw in always-on IoT sensors and wearables with coin-cell batteries. |
| Reset validity down to VCC = 0.5 V | Ensures deterministic system behavior during deep brownout recovery and ultra-low-voltage wake-up sequences. |
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 2.83 V and holds for programmable timeout. Use Value: Prevents CPU lockup or corrupted flash writes by guaranteeing clean boot sequence under marginal supply conditions. | Use Scenario: Ensuring safe startup of a handheld glucose meter powered by a single alkaline cell (0.9–1.6 V). IC Role / Device Role / Timing Role: Supervising stepped-up 2.8 V rail; asserting reset if voltage sags below 2.83 V during high-current sensor activation. Use Value: Avoids erroneous readings or EEPROM corruption by halting processor execution until regulated supply meets precision threshold. |
| Industrial PLC I/O Modules | Smart Energy Meters |
Use Scenario: Protecting FPGA configuration state in a DIN-rail mounted I/O module exposed to 24 V DC bus ripple and EFT bursts. IC Role / Device Role / Timing Role: Detecting brownout on 3.3 V auxiliary rail; holding reset for 200 ms after recovery to allow LDO stabilization. Use Value: Maintains deterministic I/O state and prevents spurious digital output toggling during transient supply disturbances. | Use Scenario: Securing metering SoC boot integrity in a Class 0.5S electricity meter operating from wide-input AC/DC converter. IC Role / Device Role / Timing Role: Monitoring 3.3 V logic rail; generating reset pulse with 50 ms timeout to synchronize RTC and metrology ADC initialization. Use Value: Guarantees accurate energy accumulation from first power cycle by enforcing strict POR timing aligned with analog front-end settling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G125DBVR | Fixed 2.85 V threshold (±0.5%), 350 ms factory-programmed timeout, higher ICC (2.5 µA min) | Lacks external timeout adjustability; tighter threshold tolerance but less flexible timing | Choose when fixed, shorter timeout and lower current are prioritized over programmability |
| MAX6326UT28D3+ | 2.8 V threshold (±1.5%), fixed 140 ms timeout, push-pull output, higher ICC (10 µA typ) | No external capacitor option; push-pull eliminates need for pullup but limits voltage translation | Prefer when board space prohibits pullup resistor and fixed timing suffices |
Compared with LP3470IM5-2.83/NOPB, TPS3808G125DBVR offers superior threshold accuracy and lower current but forfeits timeout flexibility, while MAX6326UT28D3+ simplifies layout with push-pull output yet sacrifices both programmability and threshold precision.
Availability
LP3470IM5-2.83/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 production continuity.
Supply support for LP3470IM5-2.83/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 LP3470 series belongs to TI's precision voltage supervisor product line, designed specifically for reliable power-on-reset and brownout detection in space-constrained, battery-sensitive, and industrial-grade applications.
FAQ
What is the exact reset threshold voltage of LP3470IM5-2.83/NOPB?
The LP3470IM5-2.83/NOPB has a factory-programmed reset threshold of 2.83 V with ±1% accuracy over the operating temperature range of –20°C to 85°C. This value is guaranteed by production test and applies to all units shipped under this orderable part number.
How do I calculate the reset timeout period for LP3470IM5-2.83/NOPB?
The reset timeout period (tRP) for LP3470IM5-2.83/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 capacitor yields a 200 ms timeout. The LP3470IM5-2.83/NOPB datasheet confirms this linear relationship across temperature.
Does LP3470IM5-2.83/NOPB require an external pullup resistor on the Reset pin?
Yes, LP3470IM5-2.83/NOPB features an open-drain Reset output and requires an external pullup resistor to VCC or another logic rail. The recommended value is 20 kΩ, within the validated range of 0.68 kΩ to 68 kΩ, as specified in the LP3470IM5-2.83/NOPB electrical characteristics table.
Can LP3470IM5-2.83/NOPB operate with supply voltages below 1 V?
Yes, LP3470IM5-2.83/NOPB is fully functional down to VCC = 0.5 V, ensuring reset assertion remains valid during deep brownout conditions. This capability is explicitly tested and guaranteed per the LP3470IM5-2.83/NOPB Recommended Operating Conditions table.
What package type and dimensions does LP3470IM5-2.83/NOPB use?
LP3470IM5-2.83/NOPB uses the SOT-23 (DBV) package: a 5-pin surface-mount outline measuring 1.60 mm × 2.90 mm with 0.95 mm height. Pin 1 orientation follows quadrant Q3 per TI's tape-and-reel specification, and the device is rated MSL-1 for unlimited floor life.
LP3470IM5-2.83/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:
- 2.83V
- 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
LP3470IM5-2.83/NOPB FAQ
1.How can I place an order for LP3470IM5-2.83/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3470IM5-2.83/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 LP3470IM5-2.83/NOPB reliable?
The price and inventory of LP3470IM5-2.83/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3470IM5-2.83/NOPB is usually 5 days.
3.What payment methods are accepted for LP3470IM5-2.83/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470IM5-2.83/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3470IM5-2.83/NOPB?
LP3470IM5-2.83/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3470IM5-2.83/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 LP3470IM5-2.83/NOPB?
For technical support, including LP3470IM5-2.83/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470IM5-2.83/NOPB requirements.
6.How does Aetrix verify that LP3470IM5-2.83/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3470IM5-2.83/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 LP3470IM5-2.83/NOPB meets industry standards.
7.What is the process for return or replacement of LP3470IM5-2.83/NOPB?
All LP3470IM5-2.83/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3470IM5-2.83/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 LP3470IM5-2.83/NOPB part is unused and in its original packaging.
Return procedure for LP3470IM5-2.83/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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