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Texas Instruments LP3470IM5X-3.08
- Part No.:
- LP3470IM5X-3.08
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP3470IM5X-3.08.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,134
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Product details
Overview
LP3470IM5X-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 in microprocessor systems, asserts reset below threshold, and holds reset for tRP after VCC recovers - enabling reliable power-on-reset (POR) in battery-powered embedded controllers.
For engineers reviewing the LP3470IM5X-3.08 datasheet, LP3470IM5X-3.08 pinout, LP3470IM5X-3.08 application, or LP3470IM5X-3.08 equivalent, key selection criteria include its 3.08 V precision threshold, 16 µA quiescent current, operation down to VCC = 0.5 V, immunity to short VCC transients, and SOT-23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The LP3470IM5X-3.08 implements a precision bandgap-based voltage reference and comparator circuit to detect VCC drops below 3.08 V with ±1% accuracy over –40°C to +85°C. Its internal hysteresis (15–65 mV) prevents chatter during brownout recovery.
Reset assertion is controlled by an external capacitor on the SRT pin, enabling programmable tRP from 1 ms to 3.5 ms across temperature. The open-drain Reset output requires an external pullup resistor (0.68–68 kΩ) and remains valid down to 0.5 V VCC, supporting ultra-low-voltage system initialization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 V ±1% over –40°C to +85°C - ensures precise POR activation without margining errors in 3.3 V rail monitoring. |
| Quiescent Current | 16 µA typical at 4.5 V - enables multi-year battery life in portable instrumentation and IoT edge nodes. |
| Minimum Operating VCC | 0.5 V - guarantees reset validity during deep brownout and ultra-low-power wake-up sequences. |
| Reset Time-Out (tRP) | Programmable via external capacitor (tRP = 2000 × C1); e.g., 1 nF yields 2 ms - provides adjustable hold time for stable processor initialization. |
| Hysteresis Voltage | 15–65 mV - suppresses false resets during noisy or slowly recovering supply rails. |
| VCC Transient Immunity | Immune to short negative-going VCC glitches per Figure 6 - eliminates spurious resets in electrically noisy industrial environments. |
| Output Type | Open-drain Reset - allows wired-OR configuration with other supervisors and flexible voltage-level translation. |
Pinout & Package
LP3470IM5X-3.08 is housed in a 5-pin SOT-23 (DBV) package measuring 1.60 mm × 2.90 mm, optimized for high-density PCB layouts and automated 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 minimal delay. |
| 2 - GND | Ground reference | Primary return path for internal reference and comparator; must be low-impedance connection to system ground plane. |
| 3 - VCC1 | Internal supply tie | Must be connected directly to VCC (Pin 4); no external component required - ensures internal bias stability. |
| 4 - VCC | Supply voltage and monitor input | Monitored rail input; device operates from 0.5 V to 5.5 V and asserts reset when VCC falls below 3.08 V. |
| 5 - Reset | Open-drain active-low reset output | Drives low when VCC < 3.08 V; remains low for tRP after VCC rises above threshold - requires external pullup to VCC or logic rail. |
Key Features
| Feature | Design Value |
|---|---|
| ±1% reset threshold accuracy | Eliminates need for external trimming or margining in 3.3 V systems, reducing BOM count and validation effort. |
| Capacitor-programmable tRP | Enables precise POR timing tuning (1–3.5 ms) without firmware or additional ICs - ideal for custom boot sequences. |
| 0.5 V minimum VCC operation | Supports reset assertion during ultra-low-voltage wake-up from deep sleep modes in energy-harvesting devices. |
| 16 µA quiescent current | Reduces standby power draw by >5× vs. legacy supervisors, extending battery life in portable medical and sensor nodes. |
| Open-drain Reset with 30 µA leakage max | Permits shared reset bus across multiple ICs and simplifies level-shifting in mixed-voltage systems. |
Applications
| Industrial PLC I/O Module | Portable ECG Monitor |
|---|---|
|
Use Scenario: Monitors 3.3 V main supply in a DIN-rail mounted PLC I/O module exposed to 24 V field wiring noise and thermal cycling. IC Role / Device Role / Timing Role: Voltage supervisor providing POR and brownout detection; asserts active-low Reset until VCC stabilizes above 3.08 V and holds for 2 ms post-recovery. Use Value: Prevents CPU lockup during transient dips caused by relay switching or EMI, ensuring deterministic startup after power interruption. |
Use Scenario: Powers a battery-operated, single-lead ECG front-end with ultra-low-power MCU and analog signal chain. IC Role / Device Role / Timing Role: Micropower supervisor enabling safe boot only when battery voltage exceeds 3.08 V; operates down to 0.5 V VCC during deep discharge recovery. Use Value: Extends usable battery life by avoiding invalid operation near end-of-discharge while guaranteeing clean reset at critical low-voltage thresholds. |
| Smart Meter Communication Module | Automotive Body Control Unit (BCU) Subsystem |
|
Use Scenario: Embedded in a DLMS/IEC 62056-compliant smart meter's RF mesh communication module powered from a 3.3 V LDO. IC Role / Device Role / Timing Role: Supervises LDO output; generates glitch-immune reset pulse during AC line sags or capacitor aging-induced droop. Use Value: Meets IEC 62056-21 robustness requirements by rejecting sub-100 ns VCC transients and maintaining reset integrity across –25°C to +70°C. |
Use Scenario: Secures reliable startup of a LIN-connected door module in automotive body electronics operating from a 5 V vehicle rail. IC Role / Device Role / Timing Role: Resets microcontroller if battery voltage dips below 3.08 V during cranking; hysteresis prevents oscillation during slow recovery. Use Value: Complies with ISO 16750-2 pulse 4 (load dump) immunity requirements by holding reset through 100 ms brownouts without false releases. |
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 min tRP (internal), SOT-23-6 | Lacks capacitor-programmable tRP; lower IQ but higher threshold tolerance; requires different footprint | Choose for ultra-low-power always-on monitoring where fixed 3.0 V threshold suffices and board space permits SOT-23-6. |
| MAX6326UT308+T | 3.08 V threshold (±1.5%), 1.6 µA IQ, fixed 140 ms tRP, SC70-5 | Higher threshold tolerance, shorter fixed delay, smaller SC70 package, but no tRP adjustment | Choose for cost-sensitive consumer devices needing compact size and basic POR, where programmable delay is unnecessary. |
Compared with TPS3808G30DBVR and MAX6326UT308+T, the LP3470IM5X-3.08 offers unique capacitor-programmable reset timing and guaranteed 0.5 V operation - making it optimal for applications requiring adaptive POR sequencing and deep-brownout resilience in industrial and medical designs.
Availability
LP3470IM5X-3.08 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, portable medical monitors, smart meter communication subsystems, and automotive body control units requiring stable component supply with long-term lifecycle support.
Supply support for LP3470IM5X-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 over 90 years of innovation in power management, signal chain, and microcontrollers.
The LP3470 series was designed specifically for precision, low-power voltage supervision in battery-powered and noise-prone embedded systems - emphasizing threshold accuracy, ultra-low IQ, and robust transient immunity.
FAQ
What is the exact reset threshold voltage of the LP3470IM5X-3.08?
The LP3470IM5X-3.08 has a factory-programmed reset threshold of 3.08 V with ±1% accuracy over the full operating temperature range of –40°C to +85°C. This specification is guaranteed by production testing and applies to all units shipped under this part number, ensuring consistent POR behavior in 3.3 V systems without calibration.
How do I configure the reset time-out period for the LP3470IM5X-3.08?
Configure the reset time-out period (tRP) of the LP3470IM5X-3.08 by connecting a ceramic capacitor (≥10 V rating) between Pin 1 (SRT) and GND. Use the formula tRP (ms) = 2000 × C1 (µF); for example, a 100 nF capacitor yields 200 ms. Leaving SRT floating disables programmable delay, resulting in minimal tRP.
Does the LP3470IM5X-3.08 support operation below 1.0 V VCC?
Yes, the LP3470IM5X-3.08 guarantees reset functionality down to VCC = 0.5 V, as specified in the Recommended Operating Conditions table. This enables reliable reset assertion during deep brownout conditions and supports ultra-low-voltage wake-up sequences in energy-harvesting and battery-depleted scenarios.
What is the maximum allowable external pullup resistor value for the Reset pin of the LP3470IM5X-3.08?
The maximum recommended external pullup resistor for the Reset pin of the LP3470IM5X-3.08 is 68 kΩ, as defined in the Electrical Characteristics table. This ensures sufficient logic-high voltage despite up to 6 µA leakage current across temperature. A typical value of 20 kΩ balances speed and power consumption in most applications.
Is the LP3470IM5X-3.08 pin-compatible with other variants in the LP3470 family?
Yes, all LP3470 variants - including LP3470IM5X-2.93/NOPB, LP3470IM5X-3.08/NOPB, and LP3470IM5X-4.00/NOPB - share identical SOT-23-5 (DBV) packaging and pinout. This allows direct substitution within the same footprint when adjusting reset threshold, provided the application's voltage monitoring requirement matches the selected variant's threshold.
LP3470IM5X-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
LP3470IM5X-3.08 FAQ
1.How can I place an order for LP3470IM5X-3.08 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3470IM5X-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 LP3470IM5X-3.08 reliable?
The price and inventory of LP3470IM5X-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 LP3470IM5X-3.08 is usually 5 days.
3.What payment methods are accepted for LP3470IM5X-3.08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470IM5X-3.08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3470IM5X-3.08?
LP3470IM5X-3.08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3470IM5X-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 LP3470IM5X-3.08?
For technical support, including LP3470IM5X-3.08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470IM5X-3.08 requirements.
6.How does Aetrix verify that LP3470IM5X-3.08 is sourced from the original manufacturer or authorized distributors?
All LP3470IM5X-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 LP3470IM5X-3.08 meets industry standards.
7.What is the process for return or replacement of LP3470IM5X-3.08?
All LP3470IM5X-3.08 units undergo pre-shipment inspection (PSI). If there is an issue with LP3470IM5X-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 LP3470IM5X-3.08 part is unused and in its original packaging.
Return procedure for LP3470IM5X-3.08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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