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Texas Instruments LP3470IM5X-4.63/NOPB
- Part No.:
- LP3470IM5X-4.63/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP3470IM5X-4.63/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,044
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Product details
Overview
LP3470IM5X-4.63/NOPB from Texas Instruments is a micropower voltage supervisor IC with 4.63 V ±1% reset threshold, programmable reset timeout via external capacitor (tRP = 2000 × C1), open-drain active-low reset output, and operation down to VCC = 0.5 V. It monitors microprocessor supply rails in battery-powered systems to ensure reliable power-on-reset and brownout protection.
For engineers reviewing the LP3470IM5X-4.63/NOPB datasheet, LP3470IM5X-4.63/NOPB pinout, LP3470IM5X-4.63/NOPB application, or LP3470IM5X-4.63/NOPB equivalent, this page delivers verified specifications, SOT-23-5 pin functions, real-world timing behavior, and validated alternative options for critical µP supervision designs.
Technical Context
The LP3470IM5X-4.63/NOPB implements a precision bandgap-based voltage reference with hysteresis (VHYST = 15–65 mV) to prevent chatter during threshold crossing. Its internal comparator continuously monitors VCC against the factory-trimmed 4.63 V threshold across –40°C to +85°C.
Reset assertion is controlled by a monostable circuit triggered on VCC undershoot; the timeout interval is set solely by an external capacitor on the SRT pin, with no internal RC network. The open-drain Reset output requires an external pullup resistor (0.68–68 kΩ) and remains valid even at VCC = 0.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset threshold | 4.63 V ±1% over –40°C to +85°C - ensures accurate system startup and brownout detection at nominal 5 V rail |
| Quiescent current | 16 µA typical at 4.5 V - enables multi-year battery life in portable equipment |
| Operating voltage range | 0.5 V to 5.5 V - guarantees reset validity during deep brownout and full rail operation |
| Reset timeout (tRP) | Programmable via external capacitor: tRP = 2000 × C1 (C1 in µF, tRP in ms) - supports 1 ms to seconds-scale delays without internal timing components |
| Hysteresis | 15–65 mV - prevents oscillation during slow-rising/falling VCC transitions |
| Output type | Open-drain, active-low Reset - allows wired-OR configuration and flexible voltage-level translation |
| VOL (low-level output) | 0.1 V at IOL = 30 µA, VCC = 0.5 V - ensures clean logic-low signal even under ultra-low supply conditions |
Pinout & Package
LP3470IM5X-4.63/NOPB 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 reflow profiles (MSL Level-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SRT | Reset timeout programming input | Connects to external capacitor (C1) to ground; sets tRP = 2000 × C1; floating disables delay |
| 2 - GND | Ground reference | Primary return path for internal reference and comparator; must be low-impedance |
| 3 - VCC1 | Internal supply tie | Must be shorted to VCC (Pin 4); not functional as independent input |
| 4 - VCC | Supply voltage & threshold monitor input | Monitored rail; device operates and asserts reset when VCC < 4.63 V ±1% |
| 5 - Reset | Open-drain active-low output | Drives low during reset; requires external pullup to VCC or another logic rail |
Key Features
| Feature | Design Value |
|---|---|
| ±1% reset threshold accuracy | Guarantees precise power-rail monitoring across industrial temperature range without calibration |
| Programmable reset timeout | Enables application-specific delay tuning (e.g., 2 ms for fast-boot µPs vs. 200 ms for FPGA configuration) using only one passive component |
| Immunity to short VCC transients | Rejects sub-microsecond negative glitches up to 100 mV amplitude, eliminating false resets in noisy environments |
| Valid reset down to 0.5 V | Ensures system remains held in reset until VCC recovers sufficiently for stable logic operation |
| Low 16 µA quiescent current | Minimizes standby power draw in always-on battery-backed systems such as smart meters and IoT sensors |
Applications
| Microprocessor Power-On Reset | Battery-Powered Instrumentation |
|---|---|
|
Use Scenario: Ensuring deterministic startup of ARM Cortex-M microcontrollers after cold power-up or wake-from-sleep. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset until VCC exceeds 4.63 V and sustains for programmed tRP. Use Value: Prevents code execution before supply stabilization, eliminating boot failures and flash corruption in embedded firmware. |
Use Scenario: Maintaining system integrity in handheld multimeters powered by two AA cells (1.8–3.2 V nominal). IC Role / Device Role / Timing Role: Monitoring regulated 3.3 V rail derived from boost converter; holding MCU in reset during battery sag below 4.63 V threshold. Use Value: Extends usable battery life by enabling operation down to 0.5 V VCC, while guaranteeing reset assertion before brownout-induced data loss. |
| Industrial PLC I/O Module | Network Router Power Sequencing |
|
Use Scenario: Supervising auxiliary 5 V supply feeding isolated CAN transceivers and analog front-end circuits. IC Role / Device Role / Timing Role: Providing fault-tolerant reset signal with hysteresis to avoid chatter during line transients. Use Value: Eliminates need for discrete resistor-divider + comparator solutions, reducing BOM count and layout area by >40%. |
Use Scenario: Coordinating power-up sequence between main SoC (5 V) and PHY chip (3.3 V) in enterprise-grade routers. IC Role / Device Role / Timing Role: Generating delayed reset for secondary rail using capacitor-programmed tRP synchronized to primary rail rise. Use Value: Replaces dual-supervisor ICs with single device, simplifying timing margin analysis and reducing supply-chain complexity. |
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; internal 200 ms timeout; higher ICC (2.5 µA min) | Lacks programmable delay and 4.63 V threshold; suited for 3.3 V-only systems | Select when fixed timing and lower quiescent current are prioritized over threshold flexibility |
| MAX6326UT46D3+T | 4.63 V threshold; fixed 140 ms timeout; push-pull output; higher ICC (10 µA typ) | No external capacitor programming; incompatible open-drain requirement; less brownout margin (VCC min = 1.0 V) | Choose for systems needing push-pull drive and simplified layout, accepting reduced low-VCC robustness |
Compared with LP3470IM5X-4.63/NOPB, TPS3808G33DBVR offers lower power but lacks threshold and timing flexibility, while MAX6326UT46D3+T provides push-pull output at the cost of programmability and deep-brownout capability - making LP3470IM5X-4.63/NOPB optimal for adjustable, ultra-low-voltage µP supervision.
Availability
LP3470IM5X-4.63/NOPB is available at Aetrix Electronics and suitable for microprocessor supervision, battery-powered instrumentation, industrial control modules, and network infrastructure requiring stable component supply and long-term manufacturability.
Supply support for LP3470IM5X-4.63/NOPB 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 connectivity technologies, with decades of expertise in precision power management ICs.
The LP3470 family was designed specifically for high-accuracy, low-power voltage supervision in space- and energy-constrained microprocessor systems - emphasizing threshold stability, programmable timing, and robust transient immunity.
FAQ
What is the exact reset threshold voltage of the LP3470IM5X-4.63/NOPB?
The LP3470IM5X-4.63/NOPB has a factory-programmed reset threshold of 4.63 V with ±1% accuracy over the full operating temperature range of –40°C to +85°C. This value is trimmed during production and specified in the Electrical Characteristics table under VRTH parameter. The LP3470IM5X-4.63/NOPB maintains this precision without external calibration or trimming components.
How do I calculate the reset timeout period for the LP3470IM5X-4.63/NOPB?
The reset timeout period (tRP) for LP3470IM5X-4.63/NOPB is calculated using the formula 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. The LP3470IM5X-4.63/NOPB does not require any additional resistors or internal timing elements.
Can the LP3470IM5X-4.63/NOPB operate reliably below 1 V supply voltage?
Yes, the LP3470IM5X-4.63/NOPB guarantees valid reset assertion down to VCC = 0.5 V, as confirmed in the Recommended Operating Conditions and Electrical Characteristics tables. Its internal reference and comparator remain functional at ultra-low voltages, ensuring the Reset output stays asserted until VCC rises above 4.63 V and sustains for the programmed tRP. This capability is intrinsic to the LP3470IM5X-4.63/NOPB design.
What is the required external pullup resistor value for the Reset pin of the LP3470IM5X-4.63/NOPB?
The Reset pin of LP3470IM5X-4.63/NOPB is an open-drain output requiring an external pullup resistor to VCC or another logic rail. The recommended range is 0.68 kΩ to 68 kΩ, with 20 kΩ being typical. This ensures the output MOSFET stays within its 10 mA absolute maximum rating while maintaining a valid logic-high level under leakage conditions. The LP3470IM5X-4.63/NOPB datasheet specifies R1 = 20 kΩ for most applications.
Is the LP3470IM5X-4.63/NOPB pin-compatible with other variants in the LP3470 family?
Yes, all LP3470 variants-including LP3470IM5X-4.63/NOPB-use the identical 5-pin SOT-23 (DBV) package and share identical pinout, electrical interface, and functional behavior. Only the reset threshold voltage differs between part numbers (e.g., 2.63 V, 4.63 V). This allows direct substitution in existing layouts when changing threshold requirements, provided the new threshold aligns with system supply specifications.
LP3470IM5X-4.63/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- 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-4.63/NOPB FAQ
1.How can I place an order for LP3470IM5X-4.63/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3470IM5X-4.63/NOPB 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-4.63/NOPB reliable?
The price and inventory of LP3470IM5X-4.63/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3470IM5X-4.63/NOPB is usually 5 days.
3.What payment methods are accepted for LP3470IM5X-4.63/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470IM5X-4.63/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3470IM5X-4.63/NOPB?
LP3470IM5X-4.63/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3470IM5X-4.63/NOPB 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-4.63/NOPB?
For technical support, including LP3470IM5X-4.63/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470IM5X-4.63/NOPB requirements.
6.How does Aetrix verify that LP3470IM5X-4.63/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3470IM5X-4.63/NOPB 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-4.63/NOPB meets industry standards.
7.What is the process for return or replacement of LP3470IM5X-4.63/NOPB?
All LP3470IM5X-4.63/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3470IM5X-4.63/NOPB, 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-4.63/NOPB part is unused and in its original packaging.
Return procedure for LP3470IM5X-4.63/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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