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

Texas Instruments LP3470IM5X-2.63

Name: LP3470IM5X-2.63
Brand: Texas Instruments
SKU: LP3470IM5X-2.63
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LP3470IM5X-2.63

Manufacturer:: Texas Instruments

Category:: Supervisors

Package:: SC-74A, SOT-753

Datasheet:: LP3470IM5X-2.63.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23-5

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Product details

Overview

LP3470IM5X-2.63 from Texas Instruments is a micropower voltage supervisor IC designed for power-on-reset (POR) and brownout detection in microprocessor systems. It features a factory-programmed 2.63 V ±1% reset threshold, open-drain active-low reset output, programmable reset timeout via external capacitor (t_RP = 2000 × C₁), 16 µA typical quiescent current, and valid reset assertion down to V_CC = 0.5 V - deployed in battery-powered instrumentation and embedded controllers.

For engineers reviewing the LP3470IM5X-2.63 datasheet, LP3470IM5X-2.63 pinout, LP3470IM5X-2.63 application, or LP3470IM5X-2.63 equivalent, this page delivers verified electrical specifications, SOT-23-5 pin functions, real-world timing behavior under V_CC transients, and validated alternative options for 2.63 V supervisory use cases in portable and industrial systems.

Technical Context

The LP3470IM5X-2.63 implements a precision bandgap-based voltage reference with hysteresis (V_HYST = 15–65 mV) and internal comparator to monitor V_CC. Its reset assertion logic includes immunity to sub-1 µs negative-going V_CC transients and guarantees low-state validity across –40°C to +85°C operating range.

Reset timeout is fully externalized via capacitor on SRT pin, enabling design-adjustable delay (e.g., 2 ms with 1 nF). The open-drain Reset output requires an external pullup resistor (0.68–68 kΩ), supporting interfacing with 1.8 V to 5.5 V logic families while maintaining <0.4 V low-level voltage at 4 mA sink.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold	2.63 V ±1% over –40°C to +85°C - ensures reliable POR triggering at defined supply rail margin.
Quiescent Current	16 µA typical at 4.5 V - enables multi-year operation in coin-cell–powered devices.
Reset Timeout Range	1–3.5 ms (with C₁ = 1 nF) - programmable via external capacitor for system-specific hold time.
V_CC Operating Range	0.5 V to 5.5 V - supports reset assertion during deep brownout and compatibility with 1.8 V/3.3 V/5 V rails.
Output Type	Open-drain, active-low Reset - allows wired-OR configuration and voltage-level translation without level shifters.
Hysteresis	15–65 mV - prevents chatter during slow-rising/falling V_CC transitions near threshold.
V_OL (max)	0.4 V at I_OL = 4 mA - guarantees clean logic-low signal to microcontroller reset input under full load.

Pinout & Package

LP3470IM5X-2.63 is housed in a 5-pin SOT-23 (DBV) package measuring 1.60 mm × 2.90 mm, with moisture sensitivity level (MSL) 1 and lead finish Sn (matte tin).

Pin/Terminal	Circuit Role	Design Meaning
1 - SRT	Reset timeout programming input	Connect external capacitor to GND; t_RP (ms) = 2000 × C₁ (µF); floating disables delay.
2 - GND	Ground reference	System ground return path for internal reference and comparator; must be low-impedance.
3 - V_CC1	Internal supply tie	Must be shorted to V_CC (Pin 4); not functional as independent input.
4 - V_CC	Supply voltage & threshold monitor	Monitored rail input; reset asserts when V_CC falls below 2.63 V; operates down to 0.5 V.
5 - Reset	Open-drain reset output	Active-low signal; requires external pullup (e.g., 20 kΩ to V_CC) for µP reset interface.

Key Features

Feature	Design Value
±1% reset threshold accuracy	Guarantees precise power-rail monitoring across temperature without calibration overhead.
Programmable reset timeout	Enables system-specific reset hold time tuning via single capacitor - no firmware or external logic required.
Immunity to short V_CC transients	Rejects sub-microsecond glitches, eliminating false resets in noisy power environments.
0.5 V reset validity	Ensures deterministic reset assertion even during severe brownout - critical for nonvolatile memory write protection.
16 µA quiescent current	Minimizes standby power draw in always-on monitoring applications such as IoT edge nodes.

Applications

Microprocessor Power Monitoring	Portable Medical Instrumentation
Use Scenario: Monitoring 3.3 V supply rail of an ARM Cortex-M4-based patient monitor during battery discharge. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset to halt MCU execution until V_CC stabilizes above 2.63 V after cold start or low-battery recovery. Use Value: Prevents corrupted sensor data acquisition and flash writes during marginal supply conditions.	Use Scenario: Supervising dual 1.8 V/3.3 V rails in a handheld ultrasound probe with Li-ion battery backup. IC Role / Device Role / Timing Role: Dual-rail monitoring via separate LP3470IM5X-2.63 instances; reset timeout set to 200 ms to accommodate slow LDO startup. Use Value: Eliminates boot failures caused by asynchronous rail sequencing in space-constrained medical hardware.
Industrial PLC I/O Module	Smart Energy Metering
Use Scenario: Detecting brownout on 5 V auxiliary supply powering isolated CAN transceivers in a DIN-rail PLC. IC Role / Device Role / Timing Role: Supervisor triggering controlled shutdown sequence via microcontroller interrupt before V_CC drops below safe logic threshold. Use Value: Avoids bus lockup and preserves EEPROM integrity during grid-sag events.	Use Scenario: Ensuring clean reset of metrology SoC during AC/DC adapter switchover in a Class 0.5 smart meter. IC Role / Device Role / Timing Role: LP3470IM5X-2.63 monitors 3.3 V DC-DC output; reset timeout configured for 10 ms to match SoC's minimum reset pulse width. Use Value: Guarantees accurate energy accumulation by preventing partial-cycle measurements during power transition.

Microprocessor Power Monitoring

Portable Medical Instrumentation

Use Scenario: Monitoring 3.3 V supply rail of an ARM Cortex-M4-based patient monitor during battery discharge.

IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset to halt MCU execution until V_CC stabilizes above 2.63 V after cold start or low-battery recovery.

Use Value: Prevents corrupted sensor data acquisition and flash writes during marginal supply conditions.

Use Scenario: Supervising dual 1.8 V/3.3 V rails in a handheld ultrasound probe with Li-ion battery backup.

IC Role / Device Role / Timing Role: Dual-rail monitoring via separate LP3470IM5X-2.63 instances; reset timeout set to 200 ms to accommodate slow LDO startup.

Use Value: Eliminates boot failures caused by asynchronous rail sequencing in space-constrained medical hardware.

Industrial PLC I/O Module

Smart Energy Metering

Use Scenario: Detecting brownout on 5 V auxiliary supply powering isolated CAN transceivers in a DIN-rail PLC.

IC Role / Device Role / Timing Role: Supervisor triggering controlled shutdown sequence via microcontroller interrupt before V_CC drops below safe logic threshold.

Use Value: Avoids bus lockup and preserves EEPROM integrity during grid-sag events.

Use Scenario: Ensuring clean reset of metrology SoC during AC/DC adapter switchover in a Class 0.5 smart meter.

IC Role / Device Role / Timing Role: LP3470IM5X-2.63 monitors 3.3 V DC-DC output; reset timeout configured for 10 ms to match SoC's minimum reset pulse width.

Use Value: Guarantees accurate energy accumulation by preventing partial-cycle measurements during power transition.

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS3808G125DBVR	Fixed 1.25 V threshold; 360 ms min timeout; 2.5 µA IQ; SOT-23-6	Not suitable for 2.63 V rail monitoring; requires PCB redesign for 6-pin footprint and different timing profile.	Select only if lower threshold and ultra-low IQ outweigh need for exact 2.63 V trip point.
MAX6326UT26D3+T	2.63 V threshold; 140 ms min timeout; 1.6 µA IQ; SC70-5	SC70-5 package is smaller but has higher thermal resistance; fixed timeout lacks adjustability.	Choose when board space is critical and fixed 140 ms hold time meets system requirements.

Compared with LP3470IM5X-2.63, TPS3808G125DBVR offers lower quiescent current but cannot replace it directly due to mismatched threshold and pinout; MAX6326UT26D3+T matches the 2.63 V trip point but sacrifices programmable timeout and uses a thermally less robust package.

Availability

LP3470IM5X-2.63 is available at Aetrix Electronics and suitable for microprocessor power monitoring, portable instrumentation, industrial PLC modules, and smart energy metering requiring stable component supply and long-term production continuity.

Supply support for LP3470IM5X-2.63 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 LP3470 family was engineered for cost-sensitive, space-constrained systems needing precise, low-power voltage supervision - targeting battery-operated, industrial, and computing applications where reliability under voltage stress is critical.

FAQ

What is the exact reset threshold voltage of the LP3470IM5X-2.63?

The LP3470IM5X-2.63 has a factory-programmed reset threshold of 2.63 V with ±1% accuracy over the full operating temperature range (–40°C to +85°C). This value is guaranteed by production testing and applies specifically to this orderable variant, not the generic LP3470 family.

Can the LP3470IM5X-2.63 operate with a 1.8 V supply?

Yes, the LP3470IM5X-2.63 operates with V_CC as low as 0.5 V and up to 5.5 V. At 1.8 V, it reliably monitors its own 2.63 V threshold - meaning it will assert reset if the 1.8 V rail drops below 2.63 V (which is impossible), so it must monitor a rail ≥2.63 V, such as a 3.3 V or 5 V supply feeding the 1.8 V regulator.

How do I calculate the reset timeout period for the LP3470IM5X-2.63?

The reset timeout period t_RP is calculated using t_RP (ms) = 2000 × C₁ (µF), where C₁ is the capacitor connected between SRT (Pin 1) and GND. For example, a 100 nF (0.1 µF) capacitor yields t_RP = 200 ms. No capacitor (SRT floating) disables the timeout delay.

What pullup resistor value should I use for the Reset pin of the LP3470IM5X-2.63?

A 20 kΩ pullup resistor to V_CC is recommended for the Reset pin of the LP3470IM5X-2.63. This value satisfies both constraints: limiting sink current below 10 mA and ensuring logic-high voltage despite leakage (≤6 µA over temperature), per TI's design guidance in the datasheet.

Is the LP3470IM5X-2.63 RoHS compliant and what is its MSL rating?

Yes, the LP3470IM5X-2.63/NOPB is RoHS compliant and carries a moisture sensitivity level (MSL) rating of Level-1 at 260°C peak reflow. Its tape-and-reel packaging (3000 units per reel) and matte tin (Sn) lead finish meet JEDEC J-STD-020 requirements for standard surface-mount assembly.

LP3470IM5X-2.63 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

LP3470IM5X-2.63 FAQ

1.How can I place an order for LP3470IM5X-2.63 through Aetrix?

Please submit a Request for Quotation (RFQ) for LP3470IM5X-2.63 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 LP3470IM5X-2.63 reliable?

The price and inventory of LP3470IM5X-2.63 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3470IM5X-2.63 is usually 5 days.

3.What payment methods are accepted for LP3470IM5X-2.63?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470IM5X-2.63 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LP3470IM5X-2.63?

LP3470IM5X-2.63 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LP3470IM5X-2.63 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 LP3470IM5X-2.63?

For technical support, including LP3470IM5X-2.63 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470IM5X-2.63 requirements.

6.How does Aetrix verify that LP3470IM5X-2.63 is sourced from the original manufacturer or authorized distributors?

All LP3470IM5X-2.63 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 LP3470IM5X-2.63 meets industry standards.

7.What is the process for return or replacement of LP3470IM5X-2.63?

All LP3470IM5X-2.63 units undergo pre-shipment inspection (PSI). If there is an issue with LP3470IM5X-2.63, 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 LP3470IM5X-2.63 part is unused and in its original packaging.

Return procedure for LP3470IM5X-2.63:

1.Submit a request within 90 days.

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

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