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

Texas Instruments LP3470M5-2.93

Name: LP3470M5-2.93
Brand: Texas Instruments
SKU: LP3470M5-2.93
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LP3470M5-2.93

Manufacturer:: Texas Instruments

Category:: Supervisors

Package:: SC-74A, SOT-753

Datasheet:: LP3470M5-2.93.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23-5

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Product details

Overview

LP3470M5-2.93 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 2.93 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 - enabling reliable operation in battery-powered embedded controllers.

For engineers reviewing the LP3470M5-2.93 datasheet, LP3470M5-2.93 pinout, LP3470M5-2.93 application, or LP3470M5-2.93 equivalent, this page delivers verified electrical specifications, SOT-23-5 pin mapping, real-world use scenarios in portable equipment and industrial microcontrollers, and two validated alternative parts with documented functional and parametric differences.

Technical Context

The LP3470M5-2.93 implements a precision bandgap-based voltage reference with ±1% threshold accuracy over temperature, coupled with hysteresis (15–65 mV) to prevent chatter during supply recovery. Its internal comparator continuously monitors V_CC against the 2.93 V threshold and drives an open-drain N-channel MOSFET output stage.

Reset assertion timing is fully decoupled from internal logic: after V_CC falls below threshold, Reset goes low immediately; upon recovery, Reset remains low for a user-defined t_RP (1–3.5 ms typical with 1 nF capacitor), independent of V_CC slew rate or noise transients - ensuring deterministic system initialization.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold	2.93 V ±1% over –20°C to 85°C - guarantees accurate power-fail detection without calibration.
Quiescent Current	16 µA typical at 4.5 V - enables multi-year battery life in always-on monitoring applications.
Minimum Operating V_CC	0.5 V - ensures reset remains valid during deep brownout or ultra-low-power shutdown sequences.
Reset Output Type	Open-drain, active-low - allows wired-OR configuration and flexible pullup to any logic rail (0.68–68 kΩ).
Reset Timeout Range	1–3.5 ms (with 1 nF capacitor) - provides precise POR delay tuning without internal RC variation.
Hysteresis Voltage	15–65 mV - prevents oscillation during slow-rising or noisy supply recovery.
V_CC to Reset Delay	300 µs max over temperature - ensures fast fault response during rapid supply collapse.

Pinout & Package

LP3470M5-2.93 is housed in a 5-pin SOT-23 (DBV) package measuring 1.60 mm × 2.90 mm, with JEDEC-standard footprint and moisture sensitivity level 1 (260°C peak reflow).

Pin/Terminal	Circuit Role	Design Meaning
1 - SRT	Reset timeout programming input	Connect external capacitor (C₁) to GND; t_RP = 2000 × C₁ (ms). Floating = no delay.
2 - GND	Ground reference	Primary return path for internal reference and output stage; must be low-impedance.
3 - V_CC1	Internal supply tie	Must be shorted to Pin 4 (V_CC); not functional as separate input.
4 - V_CC	Supply voltage & threshold monitor	Monitored input; powers internal circuitry and sets reset trigger point at 2.93 V.
5 - Reset	Open-drain reset output	Active-low signal; requires external pullup resistor (typ. 20 kΩ) to host V_CC.

Key Features

Feature	Design Value
±1% reset threshold accuracy	Eliminates need for external trimming or system-level calibration across industrial temperature range.
Programmable reset timeout	Enables precise POR delay matching to processor startup requirements using only one passive component.
Immunity to short V_CC transients	Rejects sub-microsecond glitches without false resets - critical for noisy DC/DC converter outputs.
Valid reset down to 0.5 V	Ensures controlled shutdown sequencing even during severe brownout or backup battery switchover.
Low 16 µA quiescent current	Reduces standby power in always-on supervisory circuits - e.g., IoT edge nodes with coin-cell backup.

Applications

Microcontroller Power Sequencing	Battery-Powered Instrumentation
Use Scenario: Ensuring clean boot of ARM Cortex-M4 MCU after Li-ion battery voltage recovers from deep discharge. IC Role / Device Role / Timing Role: Monitors V_CC and asserts active-low reset until supply stabilizes above 2.93 V + programmed delay. Use Value: Prevents firmware execution at marginal voltage, avoiding flash corruption or peripheral lockup.	Use Scenario: Maintaining reliable reset behavior in handheld multimeter during battery swap under load. IC Role / Device Role / Timing Role: Provides guaranteed reset hold time (2 ms minimum) while main supply transitions between batteries. Use Value: Eliminates manual power-cycling requirement and ensures consistent measurement initialization.
Industrial PLC I/O Module	Medical Sensor Node
Use Scenario: Detecting undervoltage on 3.3 V I/O rail powering isolated CAN transceivers in factory automation. IC Role / Device Role / Timing Role: Generates synchronized reset pulse to microcontroller and FPGA when rail dips below 2.93 V. Use Value: Prevents metastability in digital interfaces and ensures deterministic state recovery after line disturbance.	Use Scenario: Supervising 2.93 V LDO output feeding ultra-low-power ECG analog front-end and BLE SoC. IC Role / Device Role / Timing Role: Asserts reset if supply drops due to electrode contact loss or battery aging. Use Value: Guarantees sensor data integrity by halting acquisition until stable power resumes.

Microcontroller Power Sequencing

Battery-Powered Instrumentation

Use Scenario: Ensuring clean boot of ARM Cortex-M4 MCU after Li-ion battery voltage recovers from deep discharge.

IC Role / Device Role / Timing Role: Monitors V_CC and asserts active-low reset until supply stabilizes above 2.93 V + programmed delay.

Use Value: Prevents firmware execution at marginal voltage, avoiding flash corruption or peripheral lockup.

Use Scenario: Maintaining reliable reset behavior in handheld multimeter during battery swap under load.

IC Role / Device Role / Timing Role: Provides guaranteed reset hold time (2 ms minimum) while main supply transitions between batteries.

Use Value: Eliminates manual power-cycling requirement and ensures consistent measurement initialization.

Industrial PLC I/O Module

Medical Sensor Node

Use Scenario: Detecting undervoltage on 3.3 V I/O rail powering isolated CAN transceivers in factory automation.

IC Role / Device Role / Timing Role: Generates synchronized reset pulse to microcontroller and FPGA when rail dips below 2.93 V.

Use Value: Prevents metastability in digital interfaces and ensures deterministic state recovery after line disturbance.

Use Scenario: Supervising 2.93 V LDO output feeding ultra-low-power ECG analog front-end and BLE SoC.

IC Role / Device Role / Timing Role: Asserts reset if supply drops due to electrode contact loss or battery aging.

Use Value: Guarantees sensor data integrity by halting acquisition until stable power resumes.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS3808G18DBVR	Fixed 1.8 V threshold; 350 ms factory-programmed delay; 1.4 µA IQ	Not suitable for 2.93 V monitoring; better for ultra-low-power 1.8 V logic domains	Select only if system uses 1.8 V core rail and requires nanowatt standby.
MAX6326UT29D3+	2.93 V threshold; 140 ms fixed delay; 2.5 µA IQ; push-pull output	Lacks programmable timeout; push-pull eliminates external pullup but limits voltage translation	Choose when board space prohibits external capacitor or pullup resistor.

Compared with LP3470M5-2.93, TPS3808G18DBVR offers lower quiescent current but cannot monitor 2.93 V rails, while MAX6326UT29D3+ matches the threshold but sacrifices timeout flexibility and requires different output interface design.

Availability

LP3470M5-2.93 is available at Aetrix Electronics and suitable for microcontroller power sequencing, battery-powered instrumentation, industrial PLC I/O modules, and medical sensor nodes requiring stable component supply and long-term manufacturability.

Supply support for LP3470M5-2.93 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 product line delivers precision, low-power voltage supervision for microprocessor-based systems where deterministic reset timing and supply robustness are critical - targeting portable, industrial, and medical applications.

FAQ

What is the exact reset threshold voltage of the LP3470M5-2.93?

The LP3470M5-2.93 has a factory-programmed reset threshold of 2.93 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 hysteresis is 15–65 mV, ensuring clean release without chatter during supply recovery. LP3470M5-2.93 maintains this specification across its full recommended operating voltage range (0.5 V to 5.5 V).

How do I calculate the reset timeout period for LP3470M5-2.93?

The reset timeout period (t_RP) for LP3470M5-2.93 is calculated using the formula t_RP (ms) = 2000 × C₁ (µF), where C₁ is the capacitor connected between Pin 1 (SRT) and GND. For example, a 100 nF capacitor yields 200 ms timeout. LP3470M5-2.93 supports values from 1 ms to >1 s depending on capacitor selection. If no delay is needed, leave SRT floating - LP3470M5-2.93 then asserts reset only while V_CC is below threshold.

Does LP3470M5-2.93 require an external pullup resistor on the Reset pin?

Yes, LP3470M5-2.93 has an open-drain Reset output and requires an external pullup resistor to a valid logic rail (typically the same V_CC being monitored). The datasheet specifies R₁ between 0.68 kΩ and 68 kΩ; 20 kΩ is typical. This resistor ensures a defined logic-high state when Reset is inactive. LP3470M5-2.93's output MOSFET can sink up to 10 mA, so the pullup must limit current accordingly - failure to install it will result in undefined Reset behavior.

Can LP3470M5-2.93 operate reliably at 0.5 V supply voltage?

Yes, LP3470M5-2.93 guarantees valid reset assertion down to V_CC = 0.5 V, meaning the Reset output remains actively driven low even as the supply collapses. This capability enables safe shutdown sequencing in systems with backup batteries or energy-harvesting sources. However, the 2.93 V threshold comparison becomes invalid below ~1.2 V; LP3470M5-2.93 continues asserting reset purely as a low-voltage lockout function. Operation at 0.5 V is supported per Absolute Maximum Ratings and Electrical Characteristics tables.

What is the package type and footprint compatibility of LP3470M5-2.93?

LP3470M5-2.93 uses the standard 5-pin SOT-23 (DBV) package with body dimensions of 1.60 mm × 2.90 mm and JEDEC-compliant pinout. It shares footprint and soldering profile with other SOT-23-5 devices including TLV809, MAX809, and MCP103. The moisture sensitivity level is 1 (unlimited floor life at ≤30°C/60% RH), and peak reflow temperature is 260°C. LP3470M5-2.93 is supplied in 1000-unit small tape-and-reel format (reel width 8.4 mm, quadrant Q3).

LP3470M5-2.93 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:: 2.93V

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

LP3470M5-2.93 FAQ

1.How can I place an order for LP3470M5-2.93 through Aetrix?

Please submit a Request for Quotation (RFQ) for LP3470M5-2.93 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 LP3470M5-2.93 reliable?

The price and inventory of LP3470M5-2.93 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3470M5-2.93 is usually 5 days.

3.What payment methods are accepted for LP3470M5-2.93?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470M5-2.93 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LP3470M5-2.93?

LP3470M5-2.93 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LP3470M5-2.93 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 LP3470M5-2.93?

For technical support, including LP3470M5-2.93 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470M5-2.93 requirements.

6.How does Aetrix verify that LP3470M5-2.93 is sourced from the original manufacturer or authorized distributors?

All LP3470M5-2.93 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 LP3470M5-2.93 meets industry standards.

7.What is the process for return or replacement of LP3470M5-2.93?

All LP3470M5-2.93 units undergo pre-shipment inspection (PSI). If there is an issue with LP3470M5-2.93, 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 LP3470M5-2.93 part is unused and in its original packaging.

Return procedure for LP3470M5-2.93:

1.Submit a request within 90 days.

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

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