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Texas Instruments LP3470M5-4.63
- Part No.:
- LP3470M5-4.63
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP3470M5-4.63.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:650
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Product details
Overview
LP3470M5-4.63 from Texas Instruments is a micropower voltage supervisor IC with a factory-programmed 4.63 V ±1% reset threshold, open-drain active-low reset output, and programmable reset time-out period (tRP) set via external capacitor on SRT pin. It monitors VCC supply voltage in microprocessor systems and asserts reset down to VCC = 0.5 V, supporting critical power-on-reset (POR) in battery-powered embedded controllers.
For engineers reviewing the LP3470M5-4.63 datasheet, LP3470M5-4.63 pinout, LP3470M5-4.63 application, or LP3470M5-4.63 equivalent, key selection criteria include guaranteed ±1% threshold accuracy over temperature, 16 µA typical quiescent current, immunity to short VCC transients, and compatibility with standard 5-pin SOT-23 layouts requiring only an external pullup resistor and optional timing capacitor.
Technical Context
The LP3470M5-4.63 implements a precision bandgap-based voltage reference comparator with built-in hysteresis (15–65 mV) to prevent chatter during brownout recovery. Its reset assertion logic is triggered when VCC falls below 4.63 V − VHYST and remains asserted for a user-defined tRP after VCC rises above 4.63 V.
Reset timing is fully decoupled from supply rail behavior: tRP = 2000 × C1 (C1 in µF, tRP in ms), enabling precise delay tuning from 1 ms to >3.5 ms across temperature. The open-drain Reset output requires an external pullup (0.68–68 kΩ) and guarantees VOL ≤ 0.4 V at 4 mA sink current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63 V ±1% over −20°C to 85°C - ensures reliable POR activation at defined supply level without calibration. |
| Quiescent Current | 16 µA typical at 4.5 V - enables multi-year operation in coin-cell–powered IoT sensors. |
| Minimum Operating VCC | 0.5 V - guarantees valid reset assertion during deep brownout or battery depletion. |
| Reset Time-Out Range | 1–3.5 ms (with C1 = 1 nF) - provides configurable hold time to meet processor reset timing requirements. |
| Hysteresis Voltage | 15–65 mV - prevents oscillation during slow-rising or noisy VCC transitions. |
| VCC Transient Immunity | Immune to short negative-going glitches per Figure 6 - eliminates false resets from switching noise or ESD coupling. |
| Output Type | Open-drain N-channel MOSFET - allows level-shifting, wired-OR reset buses, and flexible pullup to any compatible rail. |
Pinout & Package
LP3470M5-4.63 is housed in a 5-pin SOT-23 (DBV) package measuring 1.60 mm × 2.90 mm, optimized for space-constrained PCBs and compatible with standard reflow profiles (MSL Level-1, 260°C peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SRT | Reset time-out programming input | Connect external capacitor (C1) to GND; tRP = 2000 × C1 (µF → 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 - internal node for bias generation. |
| 4 - VCC | Supply voltage and monitor input | Monitored rail; device operates from 0.5 V to 5.5 V and asserts reset when VCC < 4.63 V − VHYST. |
| 5 - Reset | Open-drain active-low reset output | Sinks current when asserted; requires external pullup (e.g., 20 kΩ to VCC) to generate logic-high idle state. |
Key Features
| Feature | Design Value |
|---|---|
| ±1% reset threshold accuracy | Eliminates need for external trimming or system-level calibration across industrial temperature range. |
| Programmable reset time-out | Enables precise matching to µP reset timeout requirements using low-cost ceramic capacitors (e.g., 100 nF → 200 ms). |
| 0.5 V minimum operating voltage | Supports robust reset assertion even during severe brownout or end-of-battery-life conditions in portable devices. |
| 16 µA typical supply current | Reduces standby power budget impact in always-on monitoring applications such as smart meters and wearables. |
| Open-drain reset output | Permits shared reset bus across multiple ICs and simplifies interface to diverse logic families (3.3 V, 5 V, mixed-voltage). |
Applications
| Microprocessor Power Monitoring | Portable Medical Sensors |
|---|---|
|
Use Scenario: Supervises main 5 V or 3.3 V rail powering an ARM Cortex-M4 MCU in a handheld diagnostic device. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset until VCC stabilizes above 4.63 V and holds for 200 ms post-threshold crossing. Use Value: Prevents firmware execution during unstable power-up, eliminating corrupted memory writes and boot failures. |
Use Scenario: Monitors coin-cell–supplied 3 V rail in a Bluetooth-enabled glucose meter with ultra-low-power sleep mode. IC Role / Device Role / Timing Role: Resets system if battery voltage drops below 4.63 V (via resistive divider), ensuring safe shutdown before data loss. Use Value: Extends usable battery life by enabling operation down to 0.5 V VCC while guaranteeing deterministic reset behavior. |
| Industrial PLC I/O Modules | Automotive Body Control Units |
|
Use Scenario: Provides POR and brownout detection for FPGA-configured digital I/O expansion cards in factory automation racks. IC Role / Device Role / Timing Role: Generates clean, glitch-immune reset pulse synchronized to 24 V DC-DC converter output (scaled to 4.63 V). Use Value: Eliminates spurious resets caused by relay switching noise or line transients, improving system uptime. |
Use Scenario: Supervises 5 V supply to CAN transceiver and microcontroller in door module electronics. IC Role / Device Role / Timing Role: Asserts reset during cold-crank (battery dip to 6 V) and holds for 2 ms after recovery to meet ISO 16750-2 requirements. Use Value: Ensures transceiver and MCU initialize coherently after voltage recovery, preventing bus arbitration errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33 | Fixed 3.3 V threshold; 35 µA IQ; requires external R/C for delay; tighter temp drift (±0.5% over −40°C to 125°C) | Designed for higher-temp automotive use; lacks 4.63 V option; requires different timing network | Select if operating beyond 85°C or needing lower threshold tolerance; not drop-in for 4.63 V requirement. |
| MAX6326UT46D3+ | 4.63 V threshold; 1.6 µA IQ; fixed 200 ms delay; no external capacitor option; SC70-5 package | Ultra-low-power variant with factory-fixed timing; smaller footprint but no delay adjustability | Select for battery lifetime-critical designs where fixed 200 ms delay suffices and board space is constrained. |
Compared with TPS3808G33 and MAX6326UT46D3+, the LP3470M5-4.63 uniquely balances factory-trimmed 4.63 V accuracy, ultra-low 16 µA quiescent current, and field-adjustable reset timing - making it optimal for cost-sensitive industrial and portable applications requiring design flexibility without sacrificing precision.
Availability
LP3470M5-4.63 is available at Aetrix Electronics and suitable for microprocessor power monitoring, portable medical sensors, industrial PLC I/O modules, and automotive body control units requiring stable component supply and long-term manufacturability.
Supply support for LP3470M5-4.63 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 microcontrollers.
The LP3470M5-4.63 belongs to TI's voltage supervisor product line, engineered for high-accuracy, low-power power-on-reset and brownout protection in space- and energy-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of the LP3470M5-4.63?
The LP3470M5-4.63 has a factory-programmed reset threshold of 4.63 V with ±1% accuracy over the operating temperature range of −20°C to 85°C. This value is laser-trimmed during production and does not require external calibration. The LP3470M5-4.63 maintains this specification under all recommended operating conditions, including VCC = 0.5 V to 5.5 V and full temperature range.
How do I configure the reset time-out period for the LP3470M5-4.63?
Configure the reset time-out period (tRP) by connecting a capacitor (C1) between the SRT pin (Pin 1) and GND. Use the formula tRP (ms) = 2000 × C1 (µF); for example, a 100 nF capacitor yields 200 ms. The LP3470M5-4.63 supports C1 values that produce tRP from 1 ms to over 3.5 ms across temperature. Leave SRT floating if no delay is needed.
What pullup resistor value should I use with the LP3470M5-4.63 Reset output?
The LP3470M5-4.63 Reset pin is open-drain and requires an external pullup resistor to VCC. TI specifies R1 between 0.68 kΩ and 68 kΩ; a typical value is 20 kΩ. This ensures the output sinks ≤10 mA while maintaining logic-high integrity against leakage (≤6 µA over temperature). The LP3470M5-4.63 Reset output drives low to ≤0.4 V at 4 mA sink current.
Can the LP3470M5-4.63 operate reliably during VCC brownout events?
Yes - the LP3470M5-4.63 asserts reset down to VCC = 0.5 V and features built-in hysteresis (15–65 mV) to prevent chatter during slow or noisy recovery. Its architecture ensures the Reset output remains valid and monotonic throughout brownout, and the LP3470M5-4.63 is immune to short-duration negative VCC transients per Figure 6 in the datasheet.
Is the LP3470M5-4.63 pin-compatible with other members of the LP3470 family?
Yes - all LP3470 variants, including LP3470M5-4.63, use the identical 5-pin SOT-23 (DBV) package and share identical pinout (SRT, GND, VCC1, VCC, Reset). The only differences are factory-set reset thresholds and temperature grade (LP3470M5-4.63 is rated for 0°C to 0°C per orderable addendum, though functional operation extends to −20°C to 85°C per electrical specs).
LP3470M5-4.63 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:
- 4.63V
- 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
LP3470M5-4.63 FAQ
1.How can I place an order for LP3470M5-4.63 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3470M5-4.63 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 LP3470M5-4.63 reliable?
The price and inventory of LP3470M5-4.63 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3470M5-4.63 is usually 5 days.
3.What payment methods are accepted for LP3470M5-4.63?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470M5-4.63 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3470M5-4.63?
LP3470M5-4.63 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3470M5-4.63 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 LP3470M5-4.63?
For technical support, including LP3470M5-4.63 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470M5-4.63 requirements.
6.How does Aetrix verify that LP3470M5-4.63 is sourced from the original manufacturer or authorized distributors?
All LP3470M5-4.63 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 LP3470M5-4.63 meets industry standards.
7.What is the process for return or replacement of LP3470M5-4.63?
All LP3470M5-4.63 units undergo pre-shipment inspection (PSI). If there is an issue with LP3470M5-4.63, 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 LP3470M5-4.63 part is unused and in its original packaging.
Return procedure for LP3470M5-4.63:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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