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

Texas Instruments LP3470M5-2.63

Name: LP3470M5-2.63
Brand: Texas Instruments
SKU: LP3470M5-2.63
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LP3470M5-2.63

Manufacturer:: Texas Instruments

Category:: Supervisors

Package:: SC-74A, SOT-753

Datasheet:: LP3470M5-2.63.pdf

Description:: IC SUPERVISOR 1 CHANNEL SOT23-5

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Product details

Overview

LP3470M5-2.63 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), and operates down to V_CC = 0.5 V - enabling reliable supervision in battery-powered and low-voltage embedded applications.

For engineers reviewing the LP3470M5-2.63 datasheet, LP3470M5-2.63 pinout, LP3470M5-2.63 application, or LP3470M5-2.63 equivalent, key selection considerations include its ±1% threshold accuracy over temperature, 16 µA typical quiescent current, immunity to short V_CC transients, SOT-23-5 package compatibility, and requirement for an external pullup resistor on the Reset pin.

Technical Context

The LP3470M5-2.63 implements a precision bandgap-based voltage reference with hysteresis (V_HYST = 15–65 mV) to prevent chatter during threshold crossing. Its internal comparator continuously monitors V_CC against the 2.63 V threshold and asserts the open-drain Reset output low when V_CC falls below VRTH − V_HYST.

Reset assertion persists for a user-defined time-out period (t_RP) after V_CC recovers above VRTH, determined solely by an external capacitor on the SRT pin. The device remains functional across V_CC = 0.5 V to 5.5 V and ambient temperatures from 0°C to 85°C (commercial grade).

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold	2.63 V ±1% over –20°C to 85°C - ensures precise power-rail monitoring without calibration.
Quiescent Current	16 µA typical at 4.5 V - enables multi-year operation in coin-cell–powered systems.
Operating Voltage Range	0.5 V to 5.5 V - guarantees valid reset assertion even during deep brownout or ultra-low-power wake-up.
Reset Output Type	Open-drain, active-low - allows wired-OR configuration and flexible voltage-level translation via external pullup.
Reset Timeout Control	Externally programmable via capacitor on SRT pin (t_RP = 2000 × C₁, C₁ in µF, t_RP in ms) - supports 1 ms to >1 s delays with standard ceramic capacitors.
Hysteresis Voltage	15 mV min / 65 mV max - prevents oscillation during slow-rising or noisy supply transitions.
V_CC to Reset Delay	100 µs typical (300 µs max) - provides fast fault response while rejecting sub-microsecond noise spikes.

Pinout & Package

LP3470M5-2.63 is housed in a 5-pin SOT-23 (DBV) package measuring 1.60 mm × 2.90 mm, optimized for space-constrained PCB layouts and compatible with standard pick-and-place assembly.

Pin/Terminal	Circuit Role	Design Meaning
1 - SRT	Reset timeout programming input	Connect external capacitor to GND to set t_RP; floating for minimum delay (no timeout).
2 - GND	Ground reference	Primary return path for internal circuitry and reset output sink current.
3 - VCC1	Internal supply tie	Must be connected directly to VCC (Pin 4); no external connection required beyond that bond wire.
4 - VCC	Supply voltage & monitor input	Monitored rail input; powers internal circuitry and defines reset threshold reference point.
5 - Reset	Open-drain reset output	Active-low signal; requires external pullup resistor (0.68–68 kΩ) to VCC or another logic rail.

Key Features

Feature	Design Value
±1% reset threshold accuracy	Eliminates need for external trimming or system-level calibration across temperature and supply variation.
Programmable reset timeout	Enables precise POR timing alignment with processor startup requirements using a single low-cost capacitor.
Immunity to short V_CC transients	Rejects <1 µs negative glitches up to 300 mV below threshold - reduces false resets in noisy environments.
Valid reset down to 0.5 V	Ensures controlled shutdown sequencing even during severe brownout or backup battery switchover.
Low 16 µA quiescent current	Minimizes standby power loss in always-on monitoring circuits, extending battery life significantly.

Applications

Microprocessor Power-On Reset	Battery-Powered Instrumentation
Use Scenario: Ensuring clean boot of an ARM Cortex-M0 microcontroller powered from a 3.3 V LDO with variable input capacitance and cold-start conditions. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset until V_CC stabilizes above 2.63 V and holds for 200 ms (C₁ = 100 nF). Use Value: Prevents firmware execution before supply rails meet minimum operating specifications, eliminating lockups and undefined states.	Use Scenario: Monitoring a lithium-thionyl chloride primary cell (nominal 3.6 V, aging to 2.7 V) powering a wireless sensor node with ultra-low sleep current. IC Role / Device Role / Timing Role: Brownout detector triggering controlled shutdown when cell voltage drops below 2.63 V ±1%, with hysteresis preventing chatter near threshold. Use Value: Preserves nonvolatile memory integrity and avoids corrupted sensor readings during end-of-life battery discharge.
Industrial PLC I/O Module	Portable Medical Diagnostic Device
Use Scenario: Supervising dual 5 V/3.3 V rails in a DIN-rail mounted programmable logic controller with EMI-prone industrial wiring. IC Role / Device Role / Timing Role: Primary reset generator for the main MCU, rejecting fast transients induced by relay switching or motor drives. Use Value: Maintains deterministic system recovery without spurious resets, meeting IEC 61000-4-4 Level 3 immunity requirements.	Use Scenario: Enabling safe power-up sequence in a handheld ECG analyzer with separate analog front-end and digital processing sections. IC Role / Device Role / Timing Role: Coordinating reset release between analog supply stabilization (2.63 V rail) and digital core initialization. Use Value: Guarantees analog circuitry is fully biased before ADC sampling begins, reducing baseline drift and measurement offset.

Microprocessor Power-On Reset

Battery-Powered Instrumentation

Use Scenario: Ensuring clean boot of an ARM Cortex-M0 microcontroller powered from a 3.3 V LDO with variable input capacitance and cold-start conditions.

IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset until V_CC stabilizes above 2.63 V and holds for 200 ms (C₁ = 100 nF).

Use Value: Prevents firmware execution before supply rails meet minimum operating specifications, eliminating lockups and undefined states.

Use Scenario: Monitoring a lithium-thionyl chloride primary cell (nominal 3.6 V, aging to 2.7 V) powering a wireless sensor node with ultra-low sleep current.

IC Role / Device Role / Timing Role: Brownout detector triggering controlled shutdown when cell voltage drops below 2.63 V ±1%, with hysteresis preventing chatter near threshold.

Use Value: Preserves nonvolatile memory integrity and avoids corrupted sensor readings during end-of-life battery discharge.

Industrial PLC I/O Module

Portable Medical Diagnostic Device

Use Scenario: Supervising dual 5 V/3.3 V rails in a DIN-rail mounted programmable logic controller with EMI-prone industrial wiring.

IC Role / Device Role / Timing Role: Primary reset generator for the main MCU, rejecting fast transients induced by relay switching or motor drives.

Use Value: Maintains deterministic system recovery without spurious resets, meeting IEC 61000-4-4 Level 3 immunity requirements.

Use Scenario: Enabling safe power-up sequence in a handheld ECG analyzer with separate analog front-end and digital processing sections.

IC Role / Device Role / Timing Role: Coordinating reset release between analog supply stabilization (2.63 V rail) and digital core initialization.

Use Value: Guarantees analog circuitry is fully biased before ADC sampling begins, reducing baseline drift and measurement offset.

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; 1.4 µA IQ	Lower voltage monitoring only; no external timeout adjustment; tighter IQ spec	Select if supervising sub-1.8 V logic rails and minimal quiescent current is critical; not suitable for 2.63 V rail monitoring.
MAX6326UT26D3+	2.63 V threshold; 140 ms fixed timeout; push-pull output; 2.5 µA IQ	No external timeout tuning; higher drive strength; no open-drain flexibility	Choose when driving heavy loads directly or requiring guaranteed high-Z state during power loss; lacks SRT programmability.

Compared with TPS3808G125DBVR and MAX6326UT26D3+, the LP3470M5-2.63 uniquely combines 2.63 V precision threshold, user-adjustable reset timeout, open-drain output, and sub-20 µA quiescent current - making it optimal for cost-sensitive, space-constrained designs needing configurable POR timing on 2.6–3.3 V rails.

Availability

LP3470M5-2.63 is available at Aetrix Electronics and suitable for microprocessor power-on-reset, battery-powered instrumentation, industrial PLC modules, and portable medical diagnostic devices requiring stable component supply and long-term manufacturability.

Supply support for LP3470M5-2.63 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, embedded processing, and connectivity technologies, with decades of leadership in power management and supervisory ICs.

The LP3470 family was engineered for high-accuracy, low-power voltage monitoring in resource-constrained embedded systems - emphasizing threshold stability, transient immunity, and design flexibility through external timing components.

FAQ

What is the operating temperature range for LP3470M5-2.63?

The LP3470M5-2.63 is specified for commercial-grade operation from 0°C to 85°C ambient temperature. This range is confirmed in the Mechanical, Packaging, and Orderable Information section of the TI datasheet (SNVS003G), where the device marking "D25B" and "0 to 0" under Op Temp (°C) indicate the 0°C to 85°C range. It is distinct from the extended-range LP3470I variants rated for –40°C to 85°C.

Does LP3470M5-2.63 require an external pullup resistor on the Reset pin?

Yes, LP3470M5-2.63 requires an external pullup resistor on the Reset pin because it features an open-drain output structure. The datasheet specifies a recommended range of 0.68 kΩ to 68 kΩ, with 20 kΩ cited as typical. Without this resistor, the Reset signal cannot transition to a valid logic-high state, rendering the supervisor nonfunctional in most microprocessor reset configurations.

How is the reset timeout period set for LP3470M5-2.63?

The reset timeout period (t_RP) for LP3470M5-2.63 is set by connecting a capacitor between the SRT pin (Pin 1) and GND. The relationship is defined as t_RP (ms) = 2000 × C₁ (µF). For example, a 100 nF capacitor yields a 200 ms timeout. Leaving SRT floating disables the timeout, causing Reset to deassert immediately upon V_CC exceeding the 2.63 V threshold.

What is the maximum supply voltage the LP3470M5-2.63 can tolerate?

The LP3470M5-2.63 has an absolute maximum V_CC rating of 6 V, as stated in Section 6.1 (Absolute Maximum Ratings) of the TI datasheet SNVS003G. Operation above 5.5 V is not recommended under normal conditions, and sustained exposure to 6 V may impact reliability. The recommended operating range remains 0.5 V to 5.5 V.

Is LP3470M5-2.63 RoHS compliant and lead-free?

Yes, LP3470M5-2.63/NOPB is RoHS compliant and lead-free. The "NOPB" suffix explicitly denotes "No Lead (Pb)-Free", and the Package Option Addendum confirms "Green (RoHS & no Sb/Br)" eco plan with "CU SN" (copper leadframe, tin-silver finish) and JEDEC MSL Level-1 rating - all consistent with EU RoHS Directive 2011/65/EU requirements.

LP3470M5-2.63 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:: -20°C ~ 85°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-5

LP3470M5-2.63 FAQ

1.How can I place an order for LP3470M5-2.63 through Aetrix?

Please submit a Request for Quotation (RFQ) for LP3470M5-2.63 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 LP3470M5-2.63 reliable?

The price and inventory of LP3470M5-2.63 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3470M5-2.63 is usually 5 days.

3.What payment methods are accepted for LP3470M5-2.63?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470M5-2.63 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LP3470M5-2.63?

LP3470M5-2.63 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LP3470M5-2.63 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 LP3470M5-2.63?

For technical support, including LP3470M5-2.63 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470M5-2.63 requirements.

6.How does Aetrix verify that LP3470M5-2.63 is sourced from the original manufacturer or authorized distributors?

All LP3470M5-2.63 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 LP3470M5-2.63 meets industry standards.

7.What is the process for return or replacement of LP3470M5-2.63?

All LP3470M5-2.63 units undergo pre-shipment inspection (PSI). If there is an issue with LP3470M5-2.63, 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 LP3470M5-2.63 part is unused and in its original packaging.

Return procedure for LP3470M5-2.63:

1.Submit a request within 90 days.

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

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