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Texas Instruments LP3470IM5X-4.00
- Part No.:
- LP3470IM5X-4.00
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP3470IM5X-4.00.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,628
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Product details
Overview
LP3470IM5X-4.00 from Texas Instruments is a micropower voltage supervisor IC with 4.00 V ±1% reset threshold, open-drain active-low reset output, and programmable reset timeout via external capacitor. It monitors VCC supply in microprocessor systems, asserts reset below threshold, and holds reset for user-defined duration after recovery - enabling reliable power-on-reset (POR) in battery-powered and industrial embedded applications.
For engineers reviewing the LP3470IM5X-4.00 datasheet, LP3470IM5X-4.00 pinout, LP3470IM5X-4.00 application, or LP3470IM5X-4.00 equivalent, key selection criteria include reset threshold accuracy over temperature, low quiescent current (16 µA typical), operation down to VCC = 0.5 V, immunity to short VCC transients, and SOT-23 (DBV) 5-pin package compatibility.
Technical Context
The LP3470IM5X-4.00 implements a precision bandgap-based voltage reference with hysteresis (35 mV typical) and an internal delay timer controlled by external capacitor on SRT pin. Its reset assertion logic is independent of VCC regulation quality, ensuring deterministic behavior during brownout and power-up sequences.
It features an open-drain NMOS reset output requiring external pullup (0.68–68 kΩ), supports VCC operating range from 0.5 V to 5.5 V, and maintains reset validity across –40°C to +85°C ambient temperature with ±1% VRTH tolerance over full range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.00 V ±1% over –40°C to +85°C - ensures accurate system power rail monitoring without calibration. |
| Quiescent Current | 16 µA typical at 4.5 V - enables multi-year battery life in portable equipment. |
| VCC Operating Range | 0.5 V to 5.5 V - guarantees reset assertion even during deep brownout or ultra-low-power wake-up. |
| Hysteresis Voltage | 35 mV typical - prevents reset chatter near threshold during slow-rising/falling VCC transitions. |
| Reset Timeout | Programmable via external capacitor (tRP = 2000 × C1, C1 in µF, tRP in ms) - allows precise POR timing from sub-ms to seconds. |
| Output Type | Open-drain NMOS - supports wired-OR reset buses and flexible voltage-level interfacing. |
| ESD Rating | ±2000 V HBM - meets standard handling requirements for automated assembly environments. |
Pinout & Package
LP3470IM5X-4.00 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 timeout programming input | Connect external capacitor to GND to set 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); not functional as separate input. |
| 4 - VCC | Supply voltage & monitor input | Monitored rail; powers device and defines reset threshold; valid down to 0.5 V. |
| 5 - Reset | Open-drain active-low output | Drives low when VCC < VRTH − VHYST; requires external pullup resistor (20 kΩ typical). |
Key Features
| Feature | Design Value |
|---|---|
| ±1% reset threshold accuracy | Maintains tight POR timing across temperature without trimming or calibration. |
| 16 µA typical supply current | Minimizes standby power draw in always-on supervisory circuits. |
| Reset valid down to VCC = 0.5 V | Ensures deterministic reset assertion during deep undervoltage conditions. |
| Immunity to short VCC transients | Rejects sub-microsecond negative glitches without false triggering. |
| External capacitor-programmable timeout | Enables application-specific POR hold time from 1 ms to >1 s using standard ceramic capacitors. |
Applications
| Microprocessor Power Monitoring | Portable Equipment Supervision |
|---|---|
Use Scenario: Monitoring 3.3 V or 5 V supply rails in ARM Cortex-M or RISC-V microcontroller systems during cold start and brownout events. IC Role / Device Role / Timing Role: Voltage supervisor providing factory-trimmed 4.00 V reset threshold and programmable delay to guarantee clean processor initialization. Use Value: Prevents erratic MCU boot behavior by holding reset until VCC stabilizes above 4.00 V and remains valid for ≥2 ms (C1 = 1 nF). | Use Scenario: Enabling reliable wake-up and shutdown sequencing in handheld medical devices powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Low-quiescent-current supervisor asserting reset when battery voltage drops below 4.00 V, with timeout adjusted for safe firmware save operations. Use Value: Extends usable battery capacity by drawing only 16 µA while maintaining guaranteed reset assertion down to 0.5 V VCC. |
| Industrial Embedded Systems | Intelligent Instrumentation |
Use Scenario: Ensuring deterministic startup of PLC I/O modules exposed to wide ambient temperature swings (–40°C to +85°C). IC Role / Device Role / Timing Role: Temperature-stable voltage monitor with ±1% VRTH tolerance and hysteresis to prevent reset oscillation during thermal cycling. Use Value: Eliminates field failures caused by marginal supply rejection by maintaining reset integrity across full industrial temperature range. | Use Scenario: Providing fail-safe power sequencing in digital multimeters and portable oscilloscopes with dual-supply analog front-ends. IC Role / Device Role / Timing Role: Dual-role supervisor: monitors main 5 V rail and enables controlled reset of ADC/DAC subsystems via programmable timeout. Use Value: Guarantees analog signal chain initialization completes before digital processing begins, reducing measurement offset drift. |
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 nA quiescent current; push-pull output; no external capacitor programming. | Better for ultra-low-power always-on monitoring but lacks adjustable timeout and 4.00 V threshold. | Select when lowest possible ICC dominates and fixed 3.3 V reset suffices. |
| MAX6326UT40D3+ | 4.00 V threshold; 1.6 µA ICC; fixed 200 ms timeout; SOT-23-5; ±1.5% accuracy over temperature. | Higher accuracy tolerance and lower ICC than LP3470IM5X-4.00, but timeout is non-adjustable. | Select when fixed 200 ms POR is acceptable and sub-2 µA supply current is critical. |
Compared with TPS3808G33DBVR and MAX6326UT40D3+, the LP3470IM5X-4.00 uniquely balances 4.00 V precision, capacitor-programmable timeout, and 16 µA ICC - making it optimal where both threshold accuracy and timing flexibility are required in industrial and portable designs.
Availability
LP3470IM5X-4.00 is available at Aetrix Electronics and suitable for microprocessor power monitoring, portable equipment supervision, industrial embedded systems, and intelligent instrumentation requiring stable component supply and long-term manufacturability.
Supply support for LP3470IM5X-4.00 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 high-reliability ICs.
The LP3470IM5X-4.00 belongs to TI's voltage supervisor product line, designed specifically for cost-sensitive, space-constrained applications demanding precision reset thresholds, low power, and programmable timing in battery-powered and industrial control systems.
FAQ
What is the exact reset threshold voltage of the LP3470IM5X-4.00?
The LP3470IM5X-4.00 has a factory-programmed reset threshold of 4.00 V with ±1% accuracy over the full operating temperature range of –40°C to +85°C. This value is specified as VRTH in the Electrical Characteristics table and is guaranteed by production testing using Statistical Quality Control methods.
How do I configure the reset timeout period for the LP3470IM5X-4.00?
Configure the reset timeout by connecting a capacitor (C1) between the SRT pin (Pin 1) and GND. The timeout period follows tRP (ms) = 2000 × C1 (µF). For example, a 100 nF capacitor yields 200 ms. Leaving SRT floating disables the timeout, causing Reset to deassert immediately after VCC rises above VRTH.
Does the LP3470IM5X-4.00 require an external pullup resistor on the Reset pin?
Yes, the LP3470IM5X-4.00 features an open-drain NMOS Reset output and requires an external pullup resistor to VCC. Recommended values range from 0.68 kΩ to 68 kΩ; 20 kΩ is typical. This ensures proper logic-high level while limiting output current to ≤10 mA during reset assertion.
Can the LP3470IM5X-4.00 operate reliably at very low supply voltages?
Yes, the LP3470IM5X-4.00 guarantees reset assertion functionality down to VCC = 0.5 V, and its recommended operating range extends from 0.5 V to 5.5 V. This enables use in ultra-low-voltage brownout detection and energy-harvesting systems where supply rails may dip significantly.
What package type and footprint does the LP3470IM5X-4.00 use?
The LP3470IM5X-4.00 uses a 5-pin SOT-23 (DBV) package with nominal dimensions of 1.60 mm × 2.90 mm. It is compatible with standard SOT-23 pick-and-place equipment and reflow profiles (MSL Level-1, peak reflow 260°C), and its pin 1 quadrant is Q3 per tape-and-reel packaging standards.
LP3470IM5X-4.00 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4V
- 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
LP3470IM5X-4.00 FAQ
1.How can I place an order for LP3470IM5X-4.00 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3470IM5X-4.00 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 LP3470IM5X-4.00 reliable?
The price and inventory of LP3470IM5X-4.00 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3470IM5X-4.00 is usually 5 days.
3.What payment methods are accepted for LP3470IM5X-4.00?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470IM5X-4.00 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3470IM5X-4.00?
LP3470IM5X-4.00 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3470IM5X-4.00 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 LP3470IM5X-4.00?
For technical support, including LP3470IM5X-4.00 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470IM5X-4.00 requirements.
6.How does Aetrix verify that LP3470IM5X-4.00 is sourced from the original manufacturer or authorized distributors?
All LP3470IM5X-4.00 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 LP3470IM5X-4.00 meets industry standards.
7.What is the process for return or replacement of LP3470IM5X-4.00?
All LP3470IM5X-4.00 units undergo pre-shipment inspection (PSI). If there is an issue with LP3470IM5X-4.00, 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 LP3470IM5X-4.00 part is unused and in its original packaging.
Return procedure for LP3470IM5X-4.00:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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