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Texas Instruments LP3470IM5-2.63/NOPB
- Part No.:
- LP3470IM5-2.63/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP3470IM5-2.63/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:21,247
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Product details
Overview
LP3470IM5-2.63/NOPB from Texas Instruments is a micropower voltage supervisor IC with 2.63 V ±1% reset threshold, programmable reset timeout via external capacitor, 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 LP3470IM5-2.63/NOPB datasheet, LP3470IM5-2.63/NOPB pinout, LP3470IM5-2.63/NOPB application, or LP3470IM5-2.63/NOPB equivalent, key selection criteria include reset threshold accuracy over temperature, quiescent current (16 µA typical), immunity to short VCC transients, SOT-23-5 package compatibility, and external capacitor-based timing flexibility.
Technical Context
The LP3470IM5-2.63/NOPB implements a precision bandgap reference and comparator architecture to achieve ±1% VRTH accuracy across –40°C to 85°C. Its reset assertion logic includes built-in hysteresis (15–65 mV) and guarantees valid reset output even when VCC drops as low as 0.5 V.
Reset timeout is fully programmable via an external capacitor on the SRT pin using tRP = 2000 × C1 (C1 in µF, tRP in ms); no internal timing elements are used. The open-drain Reset output requires an external pullup resistor (0.68–68 kΩ) and sinks up to 4 mA while maintaining VOL ≤ 0.4 V at VCC = VRTH −100 mV.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset threshold | 2.63 V ±1% over –40°C to 85°C - ensures precise POR triggering for 2.7–3.0 V logic domains |
| 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 - supports reset assertion during deep brownout and full-system wake-up |
| Reset timeout | Programmable via external capacitor (e.g., 1 nF → 2 ms) - eliminates need for fixed-delay supervisors |
| Hysteresis voltage | 15–65 mV - prevents chatter during slow-rising/falling VCC transitions |
| Output type | Open-drain, active-low - allows wired-OR reset bus and flexible pullup to any logic rail |
| VCC to Reset delay | 100–300 µs - provides fast fault detection without false triggers on noise |
Pinout & Package
LP3470IM5-2.63/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 pick-and-place assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SRT | Reset timeout programming input | Connect external capacitor to GND; tRP = 2000 × C1 (µF → ms); leave floating for minimum delay |
| 2 - GND | Ground reference | Primary 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; reset asserts when VCC falls below 2.63 V; operates down to 0.5 V |
| 5 - Reset | Open-drain reset output | Active-low signal; requires external pullup (typ. 20 kΩ); sinks ≥4 mA at VOL ≤ 0.4 V |
Key Features
| Feature | Design Value |
|---|---|
| ±1% reset threshold accuracy | Guaranteed over –40°C to 85°C - eliminates system-level calibration for critical µP reset timing |
| Programmable reset timeout | 2 ms to >1 s via single external capacitor - replaces multiple fixed-delay parts with one BOM item |
| 0.5 V reset validity | Asserts valid logic-low Reset even when VCC collapses to 0.5 V - ensures fail-safe shutdown before logic corruption |
| Immunity to short VCC transients | Rejects <100 ns negative glitches per Figure 6 - prevents spurious resets in noisy power environments |
| 16 µA quiescent current | Enables >10-year shelf life in coin-cell–powered IoT sensors without compromising supervision integrity |
Applications
| Microprocessor Power-On Reset | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Ensuring clean boot sequence for ARM Cortex-M0+ MCU powered from a 3.3 V LDO after Li-ion battery discharge. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset until VCC stabilizes above 2.63 V and holds for programmable timeout. Use Value: Prevents CPU lockup or register corruption during marginal VCC ramp by guaranteeing minimum reset pulse width (e.g., 200 ms with 100 nF). |
Use Scenario: Maintaining data integrity in handheld multimeter during battery swap or low-voltage cutoff. IC Role / Device Role / Timing Role: Brownout detector that forces controlled shutdown when cell voltage drops below 2.63 V. Use Value: Enables safe EEPROM write completion and display blanking before supply collapse, using 16 µA ICC to extend usable battery time. |
| Industrial Controller Supervision | Portable Medical Device |
Use Scenario: Monitoring 2.8 V FPGA configuration rail in PLC I/O module exposed to 12 V field wiring transients. IC Role / Device Role / Timing Role: Immune supervisor rejecting sub-100 ns VCC dips induced by relay coil flyback. Use Value: Eliminates false resets in electrically noisy factory environments without requiring oversized input capacitance. |
Use Scenario: Enabling reliable startup of Bluetooth LE SoC in wearable ECG patch powered by 3.0 V CR2032. IC Role / Device Role / Timing Role: Low-IQ supervisor ensuring reset remains asserted until regulated 2.63 V rail is stable post-boost conversion. Use Value: Guarantees SoC does not execute firmware before power rails meet timing margin, reducing field failure rate. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G01QDBVRQ1 | Fixed 2.63 V threshold, 200 ms factory-programmed timeout, automotive-grade (–40°C to 125°C) | Requires no external capacitor; tighter temp range but higher ICC (2.5 µA min vs 16 µA typ) | Choose for AEC-Q100-compliant automotive modules where layout space is constrained and fixed delay suffices. |
| MAX6326UT26D3+ | 2.63 V threshold, 140 ms fixed timeout, push-pull output, ±2% accuracy over –40°C to 85°C | No external components needed; lacks programmability and 0.5 V operation capability | Prefer for cost-sensitive consumer devices where open-drain flexibility and ultra-low-VCC operation are unnecessary. |
Compared with TPS3808G01QDBVRQ1 and MAX6326UT26D3+, the LP3470IM5-2.63/NOPB uniquely combines ±1% accuracy, 0.5 V operational floor, and capacitor-programmable timeout in a 5-pin SOT-23 - enabling design reuse across diverse supply profiles without component substitution.
Availability
LP3470IM5-2.63/NOPB is available at Aetrix Electronics and suitable for microprocessor power monitoring, battery-powered instrumentation, industrial controller supervision, and portable medical device applications requiring stable component supply and long-term lifecycle support.
Supply support for LP3470IM5-2.63/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 company delivering analog and embedded processing solutions, with leadership in power management, signal chain, and high-reliability ICs.
The LP3470IM5-2.63/NOPB belongs to TI's voltage supervisor product line, engineered for precision power monitoring in space- and power-constrained systems where reset integrity directly impacts system reliability.
FAQ
What is the reset threshold voltage of the LP3470IM5-2.63/NOPB?
The LP3470IM5-2.63/NOPB has a factory-programmed reset threshold of 2.63 V with ±1% accuracy over the full operating temperature range of –40°C to 85°C. This value is specified in the Electrical Characteristics table under VRTH and confirmed in the Mechanical, Packaging, and Orderable Information section for this exact part number.
How is the reset timeout period set for the LP3470IM5-2.63/NOPB?
The reset timeout period (tRP) of the LP3470IM5-2.63/NOPB is set by connecting an external capacitor between the SRT pin (Pin 1) and GND. The relationship is tRP (ms) = 2000 × C1 (µF); for example, a 100 nF capacitor yields 200 ms. Leaving SRT floating disables programmable delay.
Does the LP3470IM5-2.63/NOPB support operation at very low supply voltages?
Yes, the LP3470IM5-2.63/NOPB guarantees valid reset output down to VCC = 0.5 V, as stated in the Recommended Operating Conditions and Electrical Characteristics tables. This enables reliable brownout detection even during deep discharge of primary batteries.
What is the recommended pullup resistor value for the Reset output of the LP3470IM5-2.63/NOPB?
The LP3470IM5-2.63/NOPB Reset pin is open-drain and requires an external pullup resistor between Reset (Pin 5) and VCC. TI specifies R1 between 0.68 kΩ and 68 kΩ; a typical value of 20 kΩ balances speed, power, and noise immunity, as detailed in Section 7.3.3.
Is the LP3470IM5-2.63/NOPB pin-compatible with other variants in the LP3470 family?
Yes, all LP3470 variants-including LP3470IM5-2.63/NOPB-use the identical 5-pin SOT-23 (DBV) package and share identical pinout and electrical interface. Only the reset threshold voltage differs across part numbers; no PCB redesign is needed when substituting within the family.
LP3470IM5-2.63/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:
- 2.63V
- 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
LP3470IM5-2.63/NOPB FAQ
1.How can I place an order for LP3470IM5-2.63/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3470IM5-2.63/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 LP3470IM5-2.63/NOPB reliable?
The price and inventory of LP3470IM5-2.63/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3470IM5-2.63/NOPB is usually 5 days.
3.What payment methods are accepted for LP3470IM5-2.63/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470IM5-2.63/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3470IM5-2.63/NOPB?
LP3470IM5-2.63/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3470IM5-2.63/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 LP3470IM5-2.63/NOPB?
For technical support, including LP3470IM5-2.63/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470IM5-2.63/NOPB requirements.
6.How does Aetrix verify that LP3470IM5-2.63/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3470IM5-2.63/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 LP3470IM5-2.63/NOPB meets industry standards.
7.What is the process for return or replacement of LP3470IM5-2.63/NOPB?
All LP3470IM5-2.63/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3470IM5-2.63/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 LP3470IM5-2.63/NOPB part is unused and in its original packaging.
Return procedure for LP3470IM5-2.63/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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