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Texas Instruments LP3470M5-3.08
- Part No.:
- LP3470M5-3.08
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP3470M5-3.08.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:681
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Product details
Overview
LP3470M5-3.08 from Texas Instruments is a micropower voltage supervisor IC with factory-programmed 3.08 V ±1% reset threshold, open-drain active-low reset output, and capacitor-programmable reset time-out (tRP = 2000 × C1). It monitors VCC supply voltage down to 0.5 V and delivers stable power-on-reset (POR) for microprocessors in battery-powered systems.
For engineers reviewing the LP3470M5-3.08 datasheet, LP3470M5-3.08 pinout, LP3470M5-3.08 application, or LP3470M5-3.08 equivalent, this page provides verified electrical specifications, SOT-23-5 pin mapping, real-world timing behavior, and validated alternative options for critical µP supervision where reset accuracy, low quiescent current (16 µA), and transient immunity are required.
Technical Context
The LP3470M5-3.08 implements a precision bandgap-based voltage reference with 1% threshold accuracy over –20°C to 85°C, hysteresis of 15–65 mV, and internal comparator logic that asserts reset when VCC falls below 3.08 V. Its open-drain Reset output requires an external pullup resistor (0.68–68 kΩ) and remains valid down to VCC = 0.5 V.
Reset assertion timing includes a fixed VCC-to-Reset delay (≤300 µs) and a user-programmable tRP (1–3.5 ms at temperature) set by an external capacitor on the SRT pin. The device is immune to short negative-going VCC transients and features low ICC (30 µA max over temperature).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 V ±1% over –20°C to 85°C - ensures reliable POR at precise supply rail crossing point |
| Quiescent Current | 16 µA typical at 4.5 V - enables multi-year operation in coin-cell or energy-harvesting systems |
| Operating Voltage Range | 0.5 V to 5.5 V - guarantees reset validity during deep brownout and full system startup |
| Reset Output Type | Open-drain, active-low - allows wired-OR configuration and flexible voltage-level translation |
| Reset Time-Out Period | Programmable via external capacitor (tRP = 2000 × C1); 2 ms typical with 1 nF - eliminates need for fixed-delay ICs |
| Hysteresis Voltage | 15–65 mV - prevents chatter during slow-rising or noisy VCC transitions |
| VCC-to-Reset Delay | ≤300 µs - provides fast response to supply collapse without false triggering |
Pinout & Package
LP3470M5-3.08 is housed in a 5-pin SOT-23 (DBV) package measuring 1.60 mm × 2.90 mm, optimized for space-constrained PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SRT | Reset time-out programming input | Connect external capacitor to ground; sets tRP = 2000 × C1 (C1 in µF, tRP in ms); leave floating for no delay |
| 2 - GND | Ground reference | Primary return path for internal reference and comparator; must be low-impedance connection |
| 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; reset triggers when VCC drops below 3.08 V; operates down to 0.5 V |
| 5 - Reset | Open-drain active-low output | Drives low during reset; requires external pullup (e.g., 20 kΩ to VCC); sinks ≤10 mA |
Key Features
| Feature | Design Value |
|---|---|
| ±1% reset threshold accuracy | Guarantees consistent POR point across temperature and unit variation - critical for deterministic firmware boot |
| Capacitor-programmable tRP | Enables precise, application-specific reset hold time without custom ASIC or firmware intervention |
| Immunity to short VCC transients | Rejects sub-microsecond glitches - avoids spurious resets in electrically noisy environments (e.g., motor drives) |
| Valid reset down to VCC = 0.5 V | Ensures controlled shutdown sequencing even during deep brownout or backup battery switchover |
| Low 16 µA quiescent current | Minimizes standby power loss - essential for always-on IoT sensors and portable medical devices |
Applications
| Microprocessor Power Monitoring | Portable Medical Devices |
|---|---|
Use Scenario: Monitoring main 3.3 V supply rail during cold start and battery depletion in handheld diagnostic tools. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset until VCC stabilizes above 3.08 V, then holding reset for 200 ms (via 100 nF SRT cap) to ensure full µP initialization. Use Value: Prevents corrupted memory writes and erratic bootloader execution caused by marginal supply conditions. |
Use Scenario: Supervising dual-supply rails (main Li-ion and backup coin cell) in wearable ECG monitors. IC Role / Device Role / Timing Role: Detecting drop below 3.08 V on primary rail and generating clean reset pulse to initiate safe state transition to backup power. Use Value: Eliminates risk of data loss or sensor misread during power source handover. |
| Industrial PLC I/O Modules | Smart Metering Endpoints |
Use Scenario: Ensuring deterministic restart after AC line interruption or surge-induced brownout in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Providing hysteresis-stabilized reset signal with 15–65 mV VHYST to avoid oscillation during slow VCC recovery. Use Value: Guarantees single, unambiguous reset event per fault - critical for SIL-2 functional safety compliance. |
Use Scenario: Validating stable 3.3 V rail before enabling RF transceiver and metrology ADC in AMI meters. IC Role / Device Role / Timing Role: Acting as POR enabler with programmable tRP (e.g., 100 ms) to synchronize analog front-end calibration with digital core wake-up. Use Value: Reduces first-read error rate and improves measurement repeatability across temperature and supply variance. |
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 ms factory-programmed tRP, higher ICC (12 µA typ) | Lacks capacitor-programmable delay; tighter threshold tolerance but less timing flexibility | Select when fixed delay and higher accuracy outweigh need for adjustable tRP |
| MAX6326LT31D3T | 3.08 V threshold (±1.5%), no external capacitor option, 140 ms fixed tRP, push-pull output | Non-programmable timing; push-pull eliminates external pullup but limits voltage translation | Choose for simplified BOM where open-drain flexibility is unnecessary and layout space is constrained |
Compared with LP3470M5-3.08, TPS3808G33DBVR offers superior threshold accuracy but sacrifices tRP adjustability, while MAX6326LT31D3T trades programmability for smaller footprint and integrated output drive - making LP3470M5-3.08 optimal where design-specific reset timing and open-drain interoperability are mandatory.
Availability
LP3470M5-3.08 is available at Aetrix Electronics and suitable for microprocessor power monitoring, portable medical instrumentation, industrial control modules, and smart metering endpoints requiring stable component supply and long-term lifecycle support.
Supply support for LP3470M5-3.08 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 delivering analog and embedded processing solutions, with decades of expertise in precision power management and supervisory ICs.
The LP3470 family was designed specifically for high-reliability power-on-reset and brownout detection in resource-constrained embedded systems, emphasizing micropower operation, factory-trimmed accuracy, and robust transient immunity.
FAQ
What is the exact reset threshold voltage of the LP3470M5-3.08?
The LP3470M5-3.08 has a factory-programmed reset threshold of 3.08 V with ±1% accuracy over the operating temperature range of –20°C to 85°C. This value is guaranteed by production testing and applies directly to the LP3470M5-3.08 part number, not the broader LP3470 family.
Can the LP3470M5-3.08 operate with a supply voltage below 1 V?
Yes, the LP3470M5-3.08 guarantees valid reset assertion down to VCC = 0.5 V, enabling use in ultra-low-voltage scenarios such as backup battery switchover or deep brownout recovery. Its internal circuitry remains functional and the Reset output remains asserted low until VCC exceeds 3.08 V and the programmed tRP expires.
How do I calculate the reset time-out period for the LP3470M5-3.08?
The reset time-out period (tRP) 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 = 0.2 ms. The LP3470M5-3.08 datasheet confirms this equation applies specifically to the LP3470M5-3.08 variant.
Does the LP3470M5-3.08 require an external pullup resistor on the Reset pin?
Yes, the LP3470M5-3.08 features an open-drain Reset output and requires an external pullup resistor (0.68–68 kΩ, typically 20 kΩ) to VCC. This is mandatory for proper logic-high level generation and is explicitly specified in the LP3470M5-3.08 datasheet's "Pullup Resistor Selection" section.
Is the LP3470M5-3.08 pin-compatible with other LP3470 variants like LP3470M5-2.93?
Yes, all LP3470M5-x.x variants-including LP3470M5-3.08-share identical SOT-23-5 (DBV) packaging and pinout. The only functional difference is the factory-programmed reset threshold voltage; electrical characteristics, timing behavior, and interface requirements remain consistent across the series.
LP3470M5-3.08 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:
- 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 FAQ
1.How can I place an order for LP3470M5-3.08 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3470M5-3.08 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 reliable?
The price and inventory of LP3470M5-3.08 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 is usually 5 days.
3.What payment methods are accepted for LP3470M5-3.08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470M5-3.08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3470M5-3.08?
LP3470M5-3.08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3470M5-3.08 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?
For technical support, including LP3470M5-3.08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470M5-3.08 requirements.
6.How does Aetrix verify that LP3470M5-3.08 is sourced from the original manufacturer or authorized distributors?
All LP3470M5-3.08 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 meets industry standards.
7.What is the process for return or replacement of LP3470M5-3.08?
All LP3470M5-3.08 units undergo pre-shipment inspection (PSI). If there is an issue with LP3470M5-3.08, 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 part is unused and in its original packaging.
Return procedure for LP3470M5-3.08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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