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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Texas Instruments LP3470M5X-4.63

Name: LP3470M5X-4.63
Brand: Texas Instruments
SKU: LP3470M5X-4.63
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LP3470M5X-4.63

Manufacturer:: Texas Instruments

Category:: Supervisors

Package:: SC-74A, SOT-753

Datasheet:: LP3470M5X-4.63.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23-5

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Product details

Overview

LP3470M5X-4.63 from Texas Instruments is a micropower voltage supervisor IC with 4.63 V ±1% reset threshold, open-drain active-low reset output, and programmable reset timeout via external capacitor. It monitors VCC supply voltage in microprocessor systems and asserts reset down to 0.5 V, ensuring reliable power-on-reset (POR) in battery-powered and embedded applications.

For engineers reviewing the LP3470M5X-4.63 datasheet, LP3470M5X-4.63 pinout, LP3470M5X-4.63 application, or LP3470M5X-4.63 equivalent, this page delivers verified specifications, SOT-23-5 pin mapping, real-world timing behavior, and validated alternative options for critical µP power monitoring designs.

Technical Context

The LP3470M5X-4.63 implements a precision bandgap-based voltage reference and comparator with hysteresis (35 mV typical), enabling stable reset assertion during brownout conditions. Its internal circuitry guarantees reset validity even as VCC drops to 0.5 V, supporting low-voltage system operation.

Reset timeout is fully programmable via an external capacitor on the SRT pin using t_RP = 2000 × C₁ (C₁ in µF, t_RP in ms), with no capacitor required for immediate release. The device draws only 16 µA typical quiescent current and is immune to short VCC transients due to built-in glitch rejection.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold	4.63 V ±1% over –20°C to 85°C - ensures accurate power-fail detection without calibration.
Quiescent Current	16 µA typical at 4.5 V - enables multi-year operation in coin-cell–powered systems.
Minimum Operating VCC	0.5 V - guarantees reset assertion during deep brownout or battery depletion.
Reset Output Type	Open-drain, active-low - allows wired-OR configuration and flexible pullup to any logic rail.
Hysteresis Voltage	35 mV typical - prevents chatter during slow-rising/falling VCC transitions.
Reset Timeout Range	1 ms to 3.5 ms (–20°C to 85°C) with 1 nF capacitor - provides precise POR delay control.
VCC to Reset Delay	100 µs typical (VCC falling at 1 mV/µs) - ensures fast fault response for real-time systems.

Pinout & Package

LP3470M5X-4.63 is housed in a 5-pin SOT-23 (DBV) package measuring 1.60 mm × 2.90 mm, RoHS-compliant with lead finish CuSn and moisture sensitivity level (MSL) Level-1.

Pin/Terminal	Circuit Role	Design Meaning
1 - SRT	Reset timeout programming input	Connect external capacitor to ground; sets t_RP = 2000 × C₁ (ms). Leave floating for zero-delay reset.
2 - GND	Ground reference	System ground return path for internal reference and comparator circuits.
3 - VCC1	Internal supply tie	Must be connected directly to VCC (Pin 4); not user-accessible for external biasing.
4 - VCC	Supply voltage & monitor input	Monitored rail; reset triggers when VCC falls below 4.63 V; valid operation down to 0.5 V.
5 - Reset	Open-drain reset output	Active-low signal; requires external pullup resistor (0.68–68 kΩ) to VCC or logic rail.

Key Features

Feature	Design Value
±1% reset threshold accuracy	Eliminates need for external trimming or system-level calibration across temperature.
Programmable reset timeout	Enables precise POR timing alignment with µP startup requirements using a single capacitor.
0.5 V minimum VCC operation	Supports ultra-low-power shutdown sequencing and battery end-of-life detection.
Immunity to short VCC transients	Rejects sub-microsecond glitches without false resets, reducing need for additional filtering.
16 µA typical supply current	Minimizes standby power impact in always-on monitoring circuits and IoT edge nodes.

Applications

Microprocessor Power Monitoring	Portable Medical Device Supervision
Use Scenario: Monitoring main 5 V supply rail in an ARM-based diagnostic handheld unit during battery discharge and USB charging transitions. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset to hold µP in reset until VCC stabilizes above 4.63 V after power-up or brownout recovery. Use Value: Prevents corrupted firmware execution during unstable supply conditions, meeting IEC 62304 safety requirements for Class B devices.	Use Scenario: Ensuring safe boot sequence in a Bluetooth-enabled glucose meter powered by a single CR2032 cell. IC Role / Device Role / Timing Role: Detecting voltage drop below 4.63 V during battery aging and triggering controlled shutdown before data loss. Use Value: Guarantees EEPROM write completion and sensor calibration persistence prior to power collapse.
Industrial PLC I/O Module	Smart Energy Meter
Use Scenario: Supervising 3.3 V logic rail in a DIN-rail mounted I/O module exposed to 24 V field wiring transients. IC Role / Device Role / Timing Role: Providing glitch-immune reset assertion during EFT bursts on adjacent power lines. Use Value: Maintains deterministic µP restart timing despite 1 kV/5 kHz EFT coupling, satisfying IEC 61000-4-4 Level 3 immunity.	Use Scenario: Validating 5 V DC-DC output in a revenue-grade electricity meter operating continuously for 15+ years. IC Role / Device Role / Timing Role: Enforcing minimum supply voltage before initializing metrology ADC and secure bootloader. Use Value: Eliminates risk of incorrect energy accumulation due to marginal supply conditions during cold-start.

Microprocessor Power Monitoring

Portable Medical Device Supervision

Use Scenario: Monitoring main 5 V supply rail in an ARM-based diagnostic handheld unit during battery discharge and USB charging transitions.

IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset to hold µP in reset until VCC stabilizes above 4.63 V after power-up or brownout recovery.

Use Value: Prevents corrupted firmware execution during unstable supply conditions, meeting IEC 62304 safety requirements for Class B devices.

Use Scenario: Ensuring safe boot sequence in a Bluetooth-enabled glucose meter powered by a single CR2032 cell.

IC Role / Device Role / Timing Role: Detecting voltage drop below 4.63 V during battery aging and triggering controlled shutdown before data loss.

Use Value: Guarantees EEPROM write completion and sensor calibration persistence prior to power collapse.

Industrial PLC I/O Module

Smart Energy Meter

Use Scenario: Supervising 3.3 V logic rail in a DIN-rail mounted I/O module exposed to 24 V field wiring transients.

IC Role / Device Role / Timing Role: Providing glitch-immune reset assertion during EFT bursts on adjacent power lines.

Use Value: Maintains deterministic µP restart timing despite 1 kV/5 kHz EFT coupling, satisfying IEC 61000-4-4 Level 3 immunity.

Use Scenario: Validating 5 V DC-DC output in a revenue-grade electricity meter operating continuously for 15+ years.

IC Role / Device Role / Timing Role: Enforcing minimum supply voltage before initializing metrology ADC and secure bootloader.

Use Value: Eliminates risk of incorrect energy accumulation due to marginal supply conditions during cold-start.

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; 350 ms min timeout; 2.9 µA IQ	Lacks programmable timeout and 4.63 V threshold; suited for lower-voltage logic rails	Select if system uses 3.3 V core and prioritizes ultra-low IQ over threshold flexibility.
MAX6326UT46D3+	4.63 V threshold; fixed 200 ms timeout; 1.6 µA IQ; SC70-5 package	No external timeout adjustment; smaller footprint but higher thermal resistance (θJA = 277°C/W)	Choose when board space is constrained and fixed delay suffices for µP reset timing.

Compared with LP3470M5X-4.63, TPS3808G33DBVR offers lower quiescent current but lacks both the exact 4.63 V threshold and programmable timeout, while MAX6326UT46D3+ matches the threshold and is smaller but sacrifices design flexibility and thermal performance in high-density layouts.

Availability

LP3470M5X-4.63 is available at Aetrix Electronics and suitable for industrial PLC modules, portable medical diagnostics, smart energy meters, and battery-backed embedded controllers requiring stable component supply with long-term lifecycle support.

Supply support for LP3470M5X-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 specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and high-reliability ICs.

The LP3470M5X-4.63 belongs to TI's voltage supervisor product line, engineered for robust power-monitoring in cost-sensitive, battery-operated, and industrial systems where precision reset timing and low IQ are critical.

FAQ

What is the exact reset threshold voltage of the LP3470M5X-4.63?

The LP3470M5X-4.63 has a factory-programmed reset threshold of 4.63 V with ±1% accuracy over the full operating temperature range of –20°C to 85°C. This value is guaranteed by production testing and applies specifically to the LP3470M5X-4.63 variant, not other members of the LP3470 family.

Can the LP3470M5X-4.63 operate with a supply voltage below 1 V?

Yes - the LP3470M5X-4.63 remains functional and asserts a valid reset signal down to VCC = 0.5 V, making it suitable for deep-brownout detection in lithium primary battery applications. Its internal reference and comparator continue operating reliably at this level, as confirmed in Section 6.3 of the SNVS003G datasheet.

How do I calculate the reset timeout period for the LP3470M5X-4.63?

Use the formula t_RP (ms) = 2000 × C₁, where C₁ is the capacitor value in µF connected between SRT (Pin 1) and GND (Pin 2). For example, a 100 nF (0.1 µF) capacitor yields a 200 ms timeout. The LP3470M5X-4.63 datasheet validates this relationship across temperature and process variation.

Is a pullup resistor required on the Reset pin of the LP3470M5X-4.63?

Yes - the Reset pin is open-drain, so an external pullup resistor to VCC or another logic rail is mandatory. TI specifies a range of 0.68 kΩ to 68 kΩ; 20 kΩ is recommended for most applications to balance speed, power, and noise immunity. Without it, the LP3470M5X-4.63 cannot drive a valid high logic level.

Does the LP3470M5X-4.63 provide hysteresis, and what is its typical value?

Yes - the LP3470M5X-4.63 includes built-in hysteresis of 35 mV typical (15–65 mV over temperature), preventing oscillation during slow VCC transitions near the 4.63 V threshold. This hysteresis is intrinsic to the device's comparator design and does not require external components.

LP3470M5X-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

LP3470M5X-4.63 FAQ

1.How can I place an order for LP3470M5X-4.63 through Aetrix?

Please submit a Request for Quotation (RFQ) for LP3470M5X-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 LP3470M5X-4.63 reliable?

The price and inventory of LP3470M5X-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 LP3470M5X-4.63 is usually 5 days.

3.What payment methods are accepted for LP3470M5X-4.63?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470M5X-4.63 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LP3470M5X-4.63?

LP3470M5X-4.63 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LP3470M5X-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 LP3470M5X-4.63?

For technical support, including LP3470M5X-4.63 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470M5X-4.63 requirements.

6.How does Aetrix verify that LP3470M5X-4.63 is sourced from the original manufacturer or authorized distributors?

All LP3470M5X-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 LP3470M5X-4.63 meets industry standards.

7.What is the process for return or replacement of LP3470M5X-4.63?

All LP3470M5X-4.63 units undergo pre-shipment inspection (PSI). If there is an issue with LP3470M5X-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 LP3470M5X-4.63 part is unused and in its original packaging.

Return procedure for LP3470M5X-4.63:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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