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Texas Instruments LP3470IM5X-2.93
- Part No.:
- LP3470IM5X-2.93
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP3470IM5X-2.93.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,644
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Product details
Overview
LP3470IM5X-2.93 from Texas Instruments is a micropower voltage supervisor IC with factory-programmed 2.93 V ±1% reset threshold, open-drain active-low reset output, and programmable reset time-out via external capacitor. It monitors VCC supply voltage down to 0.5 V and asserts reset during brownout or power-up sequencing in microprocessor systems.
For engineers reviewing the LP3470IM5X-2.93 datasheet, LP3470IM5X-2.93 pinout, LP3470IM5X-2.93 application, or LP3470IM5X-2.93 equivalent, this page delivers verified specifications, SOT-23-5 pin mapping, real-world timing behavior, and validated alternative options for power-on-reset (POR) and supervisory circuit design.
Technical Context
The LP3470IM5X-2.93 implements a precision bandgap-based voltage reference with hysteresis (35 mV typical) and internal comparator to detect VCC drops below 2.93 V. Its reset assertion remains valid even as VCC falls to 0.5 V, ensuring reliable low-voltage supervision.
Reset deassertion is delayed by a user-programmable time-out period (tRP = 2000 × C1, where C1 in µF yields tRP in ms), implemented via an external capacitor on the SRT pin. The open-drain Reset output requires an external pullup resistor (0.68–68 kΩ) and supports logic-level compatibility across 0.5–5.5 V VCC operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93 V ±1% over –40°C to +85°C - ensures accurate power-rail monitoring without calibration. |
| Quiescent Current | 16 µA typical at 4.5 V - enables use in battery-powered systems with multi-year standby life. |
| Operating Voltage Range | 0.5 V to 5.5 V - guarantees reset validity during deep brownout and full-system power-up. |
| Reset Output Type | Open-drain, active-low - allows wired-OR configuration and flexible voltage-level translation. |
| Hysteresis Voltage | 35 mV typical at 25°C - prevents chatter during slow-rising or noisy VCC transitions. |
| Reset Time-Out Period | Programmable via external capacitor (e.g., 1 nF → 2 ms) - provides precise POR delay tuning without firmware. |
| VCC to Reset Delay | 100 µs typical at 25°C - ensures fast response to supply collapse while rejecting sub-µs transients. |
Pinout & Package
LP3470IM5X-2.93 is housed in a 5-pin SOT-23 (DBV) package measuring 1.60 mm × 2.90 mm, optimized for space-constrained PCB layouts and compatible with standard pick-and-place assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SRT | Reset time-out programming input | Connect external capacitor to GND to set tRP = 2000 × C1 (C1 in µF, tRP in ms); leave floating for minimal delay. |
| 2 - GND | Ground reference | System ground return path for internal reference and comparator; must be low-impedance. |
| 3 - VCC1 | Internal supply tie | Must be connected directly to VCC (Pin 4); not functional as independent input. |
| 4 - VCC | Supply voltage and monitor input | Monitored rail input; device operates and asserts reset down to 0.5 V on this pin. |
| 5 - Reset | Open-drain reset output | Active-low signal requiring external pullup (20 kΩ typical); sinks ≤4 mA at VCC ≥ VRTH −100 mV. |
Key Features
| Feature | Design Value |
|---|---|
| ±1% reset threshold accuracy | Guaranteed over –40°C to +85°C - eliminates need for external trimming in industrial temperature applications. |
| Immunity to short VCC transients | Rejects negative-going glitches per Figure 6 in datasheet - reduces false resets in noisy power environments. |
| Low-voltage reset validity | Reset remains asserted down to VCC = 0.5 V - ensures microprocessor remains held in reset during deep undervoltage. |
| Programmable reset timeout | tRP adjustable from ~1 ms to >3.5 ms using standard ceramic capacitors - replaces fixed-delay supervisors with one BOM item. |
| Open-drain output architecture | Supports mixed-voltage system interfacing and multi-source reset arbitration without level shifters. |
Applications
| Microprocessor Power-On Reset | Battery-Powered Instrumentation |
|---|---|
|
Use Scenario: Ensuring clean boot sequence for ARM Cortex-M or RISC-V MCU after cold start or wake-from-sleep. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset until VCC stabilizes above 2.93 V and holds for programmable delay. Use Value: Prevents code execution at marginal voltage, eliminating flash corruption and state-machine lockup in embedded firmware. |
Use Scenario: Maintaining system integrity in handheld test meters operating from single-cell Li-ion (2.8–4.2 V). IC Role / Device Role / Timing Role: Monitoring battery voltage decay and triggering controlled shutdown before cutoff. Use Value: Extends usable battery capacity by enabling graceful save-and-hibernate at 2.93 V, avoiding abrupt power loss. |
| Industrial PLC I/O Module | Medical Sensor Node |
|
Use Scenario: Supervising 3.3 V logic rails in DIN-rail mounted controllers exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Providing temperature-stable reset threshold (±1%) across –40°C to +85°C operating range. Use Value: Guarantees deterministic startup behavior without recalibration, meeting IEC 61000-6-2 immunity requirements. |
Use Scenario: Enabling ultra-low-power ECG or SpO₂ sensor nodes powered by coin-cell batteries. IC Role / Device Role / Timing Role: Micropower (16 µA) supervisor holding MCU in reset until regulated 2.93 V rail is stable. Use Value: Reduces average system current by >10 µA during sleep cycles, extending battery life beyond 5 years. |
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 1.25 V threshold; 360 ms factory-programmed delay; 2.9 µA IQ | Lacks programmable delay and 2.93 V threshold - requires redesign of timing and reference network. | Choose only if lower quiescent current is critical and 1.25 V supervision suffices. |
| MAX6326UT29D3+ | 2.93 V threshold; no programmable delay; 1.6 µA IQ; push-pull output | Fixed 220 ms timeout; incompatible open-drain interface; higher hysteresis (100 mV) | Select when board space is constrained and fixed delay is acceptable; verify pullup compatibility. |
Compared with LP3470IM5X-2.93, TPS3808G125DBVR offers lower IQ but cannot replace it without changing threshold and timing functions, while MAX6326UT29D3+ matches the 2.93 V threshold but removes design flexibility by fixing the delay and altering output drive architecture.
Availability
LP3470IM5X-2.93 is available at Aetrix Electronics and suitable for industrial control systems, portable medical devices, and battery-powered instrumentation requiring stable component supply across extended product lifecycles.
Supply support for LP3470IM5X-2.93 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 power management technologies, serving automotive, industrial, and communications markets.
The LP3470IM5X-2.93 belongs to TI's voltage supervisor product line, engineered for high-accuracy, low-power power-on-reset and brownout detection in resource-constrained digital systems.
FAQ
What is the exact reset threshold voltage of the LP3470IM5X-2.93?
The LP3470IM5X-2.93 has a factory-programmed reset threshold of 2.93 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 bearing this exact part number, as confirmed in Section 6.5 of the SNVS003G datasheet.
How do I calculate the reset time-out period for the LP3470IM5X-2.93?
The reset time-out period (tRP) for LP3470IM5X-2.93 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 tRP = 200 ms. No capacitor (SRT floating) results in minimal delay, as specified in Section 7.3.1.
Does the LP3470IM5X-2.93 support operation below 1 V?
Yes, the LP3470IM5X-2.93 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 reliable supervision during deep brownout conditions where many MCUs fail to operate.
What is the required external pullup resistor value for the LP3470IM5X-2.93 Reset pin?
The LP3470IM5X-2.93 Reset pin requires an external pullup resistor between 0.68 kΩ and 68 kΩ, with 20 kΩ recommended for most applications. This range ensures the output MOSFET stays within its 10 mA absolute maximum rating while maintaining logic-high levels under leakage conditions, per Section 7.3.3.
Is the LP3470IM5X-2.93 RoHS-compliant and lead-free?
Yes, the LP3470IM5X-2.93/NOPB variant is RoHS-compliant and lead-free, with "Green (RoHS & no Sb/Br)" eco plan and "CU SN" lead finish, as documented in the Package Option Addendum (Page 1, Orderable Device table). The "NOPB" suffix explicitly denotes lead-free packaging.
LP3470IM5X-2.93 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:
- 2.93V
- 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-2.93 FAQ
1.How can I place an order for LP3470IM5X-2.93 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3470IM5X-2.93 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-2.93 reliable?
The price and inventory of LP3470IM5X-2.93 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3470IM5X-2.93 is usually 5 days.
3.What payment methods are accepted for LP3470IM5X-2.93?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470IM5X-2.93 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3470IM5X-2.93?
LP3470IM5X-2.93 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3470IM5X-2.93 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-2.93?
For technical support, including LP3470IM5X-2.93 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470IM5X-2.93 requirements.
6.How does Aetrix verify that LP3470IM5X-2.93 is sourced from the original manufacturer or authorized distributors?
All LP3470IM5X-2.93 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-2.93 meets industry standards.
7.What is the process for return or replacement of LP3470IM5X-2.93?
All LP3470IM5X-2.93 units undergo pre-shipment inspection (PSI). If there is an issue with LP3470IM5X-2.93, 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-2.93 part is unused and in its original packaging.
Return procedure for LP3470IM5X-2.93:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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