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Texas Instruments LP3470IM5-3.08
- Part No.:
- LP3470IM5-3.08
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP3470IM5-3.08.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,368
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Product details
Overview
LP3470IM5-3.08 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 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 LP3470IM5-3.08 datasheet, LP3470IM5-3.08 pinout, LP3470IM5-3.08 application, or LP3470IM5-3.08 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 supply monitoring designs.
Technical Context
The LP3470IM5-3.08 implements a precision bandgap-based voltage reference with hysteresis (15–65 mV) and internal delay logic to generate a clean, glitch-immune reset signal. Its reset assertion is triggered when VCC falls below 3.08 V, and reset remains low for a user-defined period after VCC recovers - determined by an external capacitor on the SRT pin.
It operates across –40°C to +85°C with 16 µA typical quiescent current and maintains reset validity down to VCC = 0.5 V. The open-drain Reset output requires an external pullup resistor (0.68–68 kΩ), and immunity to short VCC transients is achieved via internal filtering and layout guidance recommending a 0.1 µF bypass capacitor near VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 V ±1% over temperature - ensures accurate power-good detection for 3.3 V rail monitoring without calibration. |
| Quiescent Current | 16 µA typical at 4.5 V - enables multi-year battery life in portable and IoT edge devices. |
| Operating Voltage Range | 0.5 V to 5.5 V - guarantees reset assertion even during deep brownout or ultra-low-power wake-up sequences. |
| Reset Time-Out | Programmable via external capacitor (tRP = 2000 × C1, C1 in µF, tRP in ms) - supports flexible POR delays from sub-millisecond to seconds. |
| Hysteresis Voltage | 15–65 mV - prevents reset chatter during slow-rising or noisy supply transitions. |
| VCC to Reset Delay | 100–300 µs - provides deterministic response to fast supply drops while avoiding false triggers from noise. |
| Output Type | Open-drain, active-low Reset - allows wired-OR configuration and compatibility with diverse logic families and voltage domains. |
Pinout & Package
LP3470IM5-3.08 is housed in a 5-pin SOT-23 (DBV) package measuring 1.60 mm × 2.90 mm, optimized for space-constrained PCB layouts in portable electronics and embedded controllers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SRT | Reset time-out programming input | Connect external capacitor to GND to set delay duration; floating disables delay. Timing accuracy depends on capacitor stability and layout proximity. |
| 2 - GND | Ground reference | Primary return path for internal reference and output stage; must be connected to system ground plane with low-inductance trace. |
| 3 - VCC1 | Internal supply tie | Must be shorted directly to Pin 4 (VCC); not a separate supply - internal connection required for proper biasing. |
| 4 - VCC | Supply voltage and monitor input | Monitored rail input; also powers internal circuitry. Valid operation starts at 0.5 V; absolute max rating is 6 V. |
| 5 - Reset | Open-drain reset output | Active-low signal asserted when VCC < 3.08 V; requires external pullup (typically 20 kΩ) to VCC or another logic domain. |
Key Features
| Feature | Design Value |
|---|---|
| ±1% reset threshold accuracy | Eliminates need for external trimming or calibration in 3.3 V system monitoring, reducing BOM count and test complexity. |
| Programmable reset timeout | Enables precise tailoring of power-on delay (e.g., 2 ms with 1 nF, 200 ms with 100 nF) to match processor reset timing requirements. |
| Immunity to short VCC transients | Rejects sub-microsecond negative glitches up to ~100 mV amplitude, preventing spurious resets in electrically noisy environments. |
| Low-voltage reset validity | Asserts reliable reset down to VCC = 0.5 V - critical for ultra-low-power wake-up supervision and brownout recovery in energy-harvesting systems. |
| Open-drain output architecture | Supports level-shifting, multi-source reset arbitration, and compatibility with 1.8 V, 3.3 V, or 5 V host logic without additional interface components. |
Applications
| Microprocessor Power-On Reset | Battery-Powered Instrumentation |
|---|---|
|
Use Scenario: Ensuring clean boot sequence for ARM Cortex-M or RISC-V microcontrollers during cold start or wake-from-sleep. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset until VCC stabilizes above 3.08 V and holds for programmable delay. Use Value: Prevents CPU lockup or corrupted register initialization by guaranteeing minimum reset pulse width aligned with processor spec (e.g., >100 ms). |
Use Scenario: Maintaining system integrity in handheld multimeters or portable gas analyzers operating from coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: Low-quiescent-current (16 µA) supervisor enabling years of shelf life while detecting end-of-battery voltage collapse. Use Value: Extends usable battery life and avoids erratic behavior by triggering controlled shutdown before brownout-induced firmware corruption. |
| Industrial Control I/O Modules | Network Edge Sensor Nodes |
|
Use Scenario: Reliable power sequencing in DIN-rail mounted PLC I/O modules exposed to 24 V DC supply fluctuations and EMI. IC Role / Device Role / Timing Role: Immune-to-transient supervisor providing glitch-free reset despite load-switching noise or relay coil kickback. Use Value: Reduces field failures caused by intermittent resets, improving MTBF in harsh industrial environments per IEC 61000-4-4 compliance targets. |
Use Scenario: Supervising ultra-low-power LoRaWAN or NB-IoT sensor nodes powered by energy harvesting (solar, thermal) with highly variable VCC. IC Role / Device Role / Timing Role: Micropower supervisor validating VCC ≥3.08 V before enabling RF transceiver and MCU, with reset held until stable. Use Value: Avoids transmission errors and memory corruption during marginal power conditions, increasing data reliability in remote deployments. |
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%), 350 nA IQ, 200 ms factory-fixed delay | Lacks programmable delay; lower IQ but less timing flexibility | Choose for ultra-low-power, fixed-delay applications where 3.0 V threshold suffices and board space is constrained. |
| MAX6326UT31D3+ | 3.08 V threshold (±1.5%), 1.6 µA IQ, no external capacitor option - fixed 140 ms delay | Higher threshold tolerance, no SRT pin; simpler layout but inflexible timing | Prefer when minimizing external components is critical and 140 ms delay meets system POR requirement. |
Compared with LP3470IM5-3.08, TPS3808G30DBVR offers significantly lower quiescent current but sacrifices programmability and threshold accuracy; MAX6326UT31D3+ eliminates external components but trades off timing adaptability and tight threshold control - making LP3470IM5-3.08 optimal for designs requiring both precision and configurability.
Availability
LP3470IM5-3.08 is available at Aetrix Electronics and suitable for microprocessor power-on-reset, battery-powered instrumentation, and industrial control I/O modules requiring stable component supply and long-term lifecycle support.
Supply support for LP3470IM5-3.08 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 company specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and high-reliability ICs.
The LP3470IM5-3.08 belongs to TI's voltage supervisor product line, engineered for precision supply monitoring in resource-constrained, battery-operated, and industrial systems where reliability and low power are mandatory.
FAQ
What is the exact reset threshold voltage of the LP3470IM5-3.08?
The LP3470IM5-3.08 has a factory-programmed reset threshold of 3.08 V with ±1% accuracy over the full operating temperature range (–40°C to +85°C). This value is specified in the Electrical Characteristics table under VRTH for the LP3470I grade and confirmed in the Mechanical, Packaging, and Orderable Information section where "LP3470IM5-3.08/NOPB" is explicitly listed with 3.08 V threshold.
Does the LP3470IM5-3.08 require an external capacitor to function?
No - the LP3470IM5-3.08 functions without an external capacitor. Pin SRT may be left floating to disable the programmable reset time-out, resulting in immediate deassertion of Reset once VCC rises above 3.08 V. However, adding a capacitor between SRT and GND enables user-defined delay (tRP = 2000 × C1), which is essential for meeting processor-specific reset hold-time requirements.
What is the recommended pullup resistor value for the Reset pin of the LP3470IM5-3.08?
The recommended pullup resistor for the LP3470IM5-3.08 Reset pin is 20 kΩ, connected between Reset (Pin 5) and VCC. The datasheet specifies a valid range of 0.68 kΩ to 68 kΩ: values below 0.68 kΩ risk exceeding the 10 mA output current limit, while values above 68 kΩ may fail to overcome leakage current and ensure a solid logic high state.
Can the LP3470IM5-3.08 operate with supply voltages below 1.0 V?
Yes - the LP3470IM5-3.08 guarantees reset assertion functionality down to VCC = 0.5 V, as stated in the Recommended Operating Conditions and Electrical Characteristics tables. While the device monitors thresholds up to 5.5 V, its ability to assert Reset at ultra-low VCC makes it suitable for brownout detection and wake-up supervision in energy-harvesting and ultra-low-power systems.
Is the LP3470IM5-3.08 pin-compatible with other LP3470 variants like LP3470IM5-2.93 or LP3470IM5-3.65?
Yes - all LP3470 variants including LP3470IM5-3.08, LP3470IM5-2.93, and LP3470IM5-3.65 share identical SOT-23-5 (DBV) packaging, pinout, and electrical interface. Only the factory-programmed reset threshold differs; no PCB redesign is needed when substituting between these variants, provided the new threshold aligns with system voltage rail requirements.
LP3470IM5-3.08 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:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LP3470IM5-3.08 FAQ
1.How can I place an order for LP3470IM5-3.08 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3470IM5-3.08 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 LP3470IM5-3.08 reliable?
The price and inventory of LP3470IM5-3.08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3470IM5-3.08 is usually 5 days.
3.What payment methods are accepted for LP3470IM5-3.08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470IM5-3.08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3470IM5-3.08?
LP3470IM5-3.08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3470IM5-3.08 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 LP3470IM5-3.08?
For technical support, including LP3470IM5-3.08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470IM5-3.08 requirements.
6.How does Aetrix verify that LP3470IM5-3.08 is sourced from the original manufacturer or authorized distributors?
All LP3470IM5-3.08 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 LP3470IM5-3.08 meets industry standards.
7.What is the process for return or replacement of LP3470IM5-3.08?
All LP3470IM5-3.08 units undergo pre-shipment inspection (PSI). If there is an issue with LP3470IM5-3.08, 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 LP3470IM5-3.08 part is unused and in its original packaging.
Return procedure for LP3470IM5-3.08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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