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

Texas Instruments LP3470IM5-2.63

Name: LP3470IM5-2.63
Brand: Texas Instruments
SKU: LP3470IM5-2.63
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LP3470IM5-2.63

Manufacturer:: Texas Instruments

Category:: Supervisors

Package:: SC-74A, SOT-753

Datasheet:: LP3470IM5-2.63.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23-5

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Product details

Overview

LP3470IM5-2.63 from Texas Instruments is a micropower voltage supervisor IC with 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 - used for reliable power-on-reset in microprocessor systems.

For engineers reviewing the LP3470IM5-2.63 datasheet, LP3470IM5-2.63 pinout, LP3470IM5-2.63 application, or LP3470IM5-2.63 equivalent, key selection considerations include reset threshold accuracy over temperature, immunity to short V_CC transients, SOT-23-5 package compatibility, and external capacitor-based timing flexibility for POR and brownout recovery.

Technical Context

The LP3470IM5-2.63 implements a precision bandgap-based voltage reference comparator with built-in hysteresis (15–65 mV) and an internal delay timer controlled by an external capacitor on the SRT pin. Its open-drain Reset output requires an external pullup resistor (0.68–68 kΩ) and asserts low when V_CC falls below 2.63 V, holding low for t_RP after V_CC recovers.

It operates across –40°C to +85°C, draws only 30 µA max over temperature, and maintains reset validity down to 0.5 V supply - enabling robust supervision in battery-powered and low-voltage embedded systems where supply rail stability is critical during startup and brownout events.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold	2.63 V ±1% over –40°C to +85°C - ensures precise power-rail monitoring without calibration.
Quiescent Current	16 µA typical at 25°C - enables multi-year operation in coin-cell or energy-harvesting applications.
Reset Timeout Range	1–3.5 ms (with 1 nF capacitor) - programmable via external C₁ (t_RP = 2000 × C₁, C₁ in µF) for system-specific POR hold time.
V_CC Operating Range	0.5 V to 5.5 V - supports supervision of ultra-low-voltage rails and legacy 5 V logic.
Hysteresis Voltage	15–65 mV - prevents chatter during slow-rising/falling V_CC transitions near threshold.
Output Type	Open-drain Reset - allows wired-OR configuration and flexible pullup to any compatible logic rail.

Pinout & Package

LP3470IM5-2.63 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 to set t_RP; floating disables timeout (reset deasserts immediately upon V_CC recovery).
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 connected directly to V_CC (Pin 4); no external component required.
4 - V_CC	Supply voltage & monitor input	Monitored rail input; device functions and asserts reset when this voltage drops below 2.63 V.
5 - Reset	Open-drain active-low output	Drives low during reset condition; requires external pullup resistor (typ. 20 kΩ) to V_CC or another logic rail.

Key Features

Feature	Design Value
±1% reset threshold accuracy	Eliminates need for external trimming or system-level recalibration across industrial temperature range.
Programmable reset timeout	Enables precise POR hold time tuning (e.g., 200 ms with 100 nF) without changing IC or firmware.
Immunity to short V_CC transients	Rejects sub-microsecond negative glitches up to specified amplitude, reducing false resets in noisy environments.
Valid reset down to 0.5 V	Ensures clean system initialization even during deep brownout or battery depletion scenarios.
Low 16 µA quiescent current	Minimizes standby power draw - critical for always-on supervisory circuits in portable equipment.

Applications

Microprocessor Power-On Reset	Battery-Powered Instrumentation
Use Scenario: Ensuring microcontroller enters known state before code execution begins after power-up or brownout recovery. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset signal until V_CC stabilizes above 2.63 V and holds for programmable t_RP. Use Value: Prevents erratic boot behavior and memory corruption by guaranteeing minimum V_CC and hold time before release.	Use Scenario: Maintaining system integrity in handheld test meters or portable sensors operating from single-cell Li-ion or alkaline batteries. IC Role / Device Role / Timing Role: Monitoring declining battery voltage and triggering controlled shutdown or low-power mode entry before undervoltage lockout. Use Value: Extends usable battery life by enabling graceful degradation instead of sudden failure at 2.63 V threshold.
Industrial Embedded Control	Computing Peripherals
Use Scenario: Supervising auxiliary power rails (e.g., 3.3 V I/O or 2.5 V core) in PLC modules or motor drives exposed to voltage sags. IC Role / Device Role / Timing Role: Providing fault-tolerant reset signaling with hysteresis and transient immunity in electrically harsh environments. Use Value: Reduces field failures caused by marginal supply conditions without requiring redundant supervision circuitry.	Use Scenario: Enabling reliable cold-boot sequencing in USB hubs, docking stations, or display adapters powered from host-supplied 5 V. IC Role / Device Role / Timing Role: Acting as primary POR generator tied to upstream 5 V rail, with reset timeout configured to exceed host enumeration window. Use Value: Eliminates enumeration timeouts and device enumeration failures due to premature release of reset signal.

Microprocessor Power-On Reset

Battery-Powered Instrumentation

Use Scenario: Ensuring microcontroller enters known state before code execution begins after power-up or brownout recovery.

IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset signal until V_CC stabilizes above 2.63 V and holds for programmable t_RP.

Use Value: Prevents erratic boot behavior and memory corruption by guaranteeing minimum V_CC and hold time before release.

Use Scenario: Maintaining system integrity in handheld test meters or portable sensors operating from single-cell Li-ion or alkaline batteries.

IC Role / Device Role / Timing Role: Monitoring declining battery voltage and triggering controlled shutdown or low-power mode entry before undervoltage lockout.

Use Value: Extends usable battery life by enabling graceful degradation instead of sudden failure at 2.63 V threshold.

Industrial Embedded Control

Computing Peripherals

Use Scenario: Supervising auxiliary power rails (e.g., 3.3 V I/O or 2.5 V core) in PLC modules or motor drives exposed to voltage sags.

IC Role / Device Role / Timing Role: Providing fault-tolerant reset signaling with hysteresis and transient immunity in electrically harsh environments.

Use Value: Reduces field failures caused by marginal supply conditions without requiring redundant supervision circuitry.

Use Scenario: Enabling reliable cold-boot sequencing in USB hubs, docking stations, or display adapters powered from host-supplied 5 V.

IC Role / Device Role / Timing Role: Acting as primary POR generator tied to upstream 5 V rail, with reset timeout configured to exceed host enumeration window.

Use Value: Eliminates enumeration timeouts and device enumeration failures due to premature release of reset signal.

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 factory-programmed timeout; higher 2.5 µA typical ICC.	Not suitable for 2.63 V rail monitoring; better for low-voltage ASIC/core supply supervision.	Select only if threshold and fixed timeout match system requirements - not a drop-in replacement.
MAX6326UT26D3+	2.63 V threshold; push-pull output; 1.6 µA typical ICC; no external capacitor programming.	Lacks adjustable timeout; requires different reset interface design (no external pullup needed).	Choose when simplicity and ultra-low ICC outweigh need for programmable delay.

Compared with LP3470IM5-2.63, TPS3808G125DBVR offers tighter ICC specs but mismatches the 2.63 V threshold, while MAX6326UT26D3+ matches the threshold and reduces BOM count but sacrifices timing flexibility - making LP3470IM5-2.63 optimal for designs needing both precision threshold and field-tunable reset hold time.

Availability

LP3470IM5-2.63 is available at Aetrix Electronics and suitable for microprocessor power-on-reset, battery-powered instrumentation, and industrial embedded control applications requiring stable component supply and long-term lifecycle support.

Supply support for LP3470IM5-2.63 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 product line delivers precision, low-power voltage supervisors for microprocessor and digital system power monitoring - designed specifically for applications demanding accurate reset thresholds, wide temperature operation, and flexible timing control.

FAQ

What is the exact reset threshold voltage of the LP3470IM5-2.63?

The LP3470IM5-2.63 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 guaranteed by TI's production testing and applies to all units shipped under this orderable part number, ensuring consistent power-rail monitoring without external calibration.

How is the reset timeout period set for the LP3470IM5-2.63?

The reset timeout period (t_RP) of the LP3470IM5-2.63 is set using an external capacitor connected between the SRT pin and GND. The relationship is t_RP (ms) = 2000 × C₁ (µF); for example, a 100 nF capacitor yields 200 ms. Leaving SRT floating disables the timeout, causing immediate reset deassertion upon V_CC recovery.

Does the LP3470IM5-2.63 require an external pullup resistor on the Reset pin?

Yes, the LP3470IM5-2.63 features an open-drain Reset output and requires an external pullup resistor to a valid logic rail (typically V_CC). TI specifies a range of 0.68 kΩ to 68 kΩ; a 20 kΩ resistor is recommended for most applications to ensure proper logic-high levels while limiting output current to <10 mA.

Can the LP3470IM5-2.63 operate with supply voltages below 1 V?

Yes, the LP3470IM5-2.63 guarantees valid reset assertion down to V_CC = 0.5 V, and its operating range extends from 0.5 V to 5.5 V. This capability supports supervision of deeply discharged batteries or ultra-low-voltage subsystems where traditional supervisors fail to function reliably.

What package type and dimensions does the LP3470IM5-2.63 use?

The LP3470IM5-2.63 uses a 5-pin SOT-23 (DBV) package with nominal body dimensions of 1.60 mm × 2.90 mm and a maximum height of 1.45 mm. It is RoHS-compliant, has MSL Level-1 rating, and is supplied in tape-and-reel format (1000 units per reel) with Q3 pin-1 quadrant orientation.

LP3470IM5-2.63 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:: 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 FAQ

1.How can I place an order for LP3470IM5-2.63 through Aetrix?

Please submit a Request for Quotation (RFQ) for LP3470IM5-2.63 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 LP3470IM5-2.63 reliable?

The price and inventory of LP3470IM5-2.63 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3470IM5-2.63 is usually 5 days.

3.What payment methods are accepted for LP3470IM5-2.63?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470IM5-2.63 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LP3470IM5-2.63?

LP3470IM5-2.63 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LP3470IM5-2.63 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 LP3470IM5-2.63?

For technical support, including LP3470IM5-2.63 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470IM5-2.63 requirements.

6.How does Aetrix verify that LP3470IM5-2.63 is sourced from the original manufacturer or authorized distributors?

All LP3470IM5-2.63 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 LP3470IM5-2.63 meets industry standards.

7.What is the process for return or replacement of LP3470IM5-2.63?

All LP3470IM5-2.63 units undergo pre-shipment inspection (PSI). If there is an issue with LP3470IM5-2.63, 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 LP3470IM5-2.63 part is unused and in its original packaging.

Return procedure for LP3470IM5-2.63:

1.Submit a request within 90 days.

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

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