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Texas Instruments LP3470IM5X-2.93/S4000050
- Part No.:
- LP3470IM5X-2.93/S4000050
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
LP3470IM5X-2.93/S4000050.pdf
- Description:
- IC SUPERVISOR PWR SUP SUPPORT
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
LP3470IM5X-2.93/S4000050 from Texas Instruments is a micropower voltage supervisor IC with 2.93 V ±1% reset threshold, open-drain active-low reset output, and programmable reset timeout via external capacitor (tRP = 2000 × C1, C1 in µF). It operates from 0.5 V to 5.5 V, draws only 16 µA typical quiescent current, and ensures valid reset down to VCC = 0.5 V - ideal for battery-powered microprocessor power monitoring.
For engineers reviewing the LP3470IM5X-2.93/S4000050 datasheet, LP3470IM5X-2.93/S4000050 pinout, LP3470IM5X-2.93/S4000050 application, or LP3470IM5X-2.93/S4000050 equivalent, key selection considerations include its ±1% threshold accuracy over temperature, immunity to short VCC transients, SOT-23-5 package compatibility, and requirement for external pullup resistor (0.68–68 kΩ) on the Reset pin.
Technical Context
The LP3470IM5X-2.93/S4000050 implements a precision bandgap-based voltage reference and comparator with hysteresis (VHYST = 15–65 mV) to detect VCC drops below 2.93 V. Its internal timing circuit uses an external capacitor on the SRT pin to generate a user-defined reset assertion period after VCC recovery.
It features an open-drain N-channel MOSFET output stage requiring external pullup, supports operation across –40°C to +85°C, and maintains reset validity even as VCC falls to 0.5 V - enabling reliable brownout detection in low-voltage embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93 V ±1% over –40°C to +85°C - ensures precise power-on-reset triggering without false asserts during temperature cycling. |
| Quiescent Current | 16 µA typical at 4.5 V - enables multi-year battery life in portable equipment with continuous supervision. |
| Operating Voltage Range | 0.5 V to 5.5 V - allows supervision of ultra-low-voltage rails (e.g., coin-cell or energy-harvesting systems) and standard 3.3/5 V logic supplies. |
| Reset Output Type | Open-drain, active-low - supports wired-OR reset buses and flexible voltage-level translation via external pullup. |
| Reset Timeout Control | Externally programmable via capacitor on SRT pin (tRP = 2000 × C1, C1 in µF) - provides design flexibility from sub-millisecond to seconds-scale hold times. |
| VCC Transient Immunity | Immune to short negative-going VCC glitches per Figure 6 - reduces need for additional filtering in noisy power environments. |
| Hysteresis Voltage | 15–65 mV - prevents chatter during slow-rising/falling supply edges and improves noise margin. |
Pinout & Package
LP3470IM5X-2.93/S4000050 is housed in a 5-pin SOT-23 (DBV) package, 1.60 mm × 2.90 mm body size, RoHS-compliant with Sn lead finish and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SRT) | Reset timeout programming input | Connect external capacitor to GND to set tRP; floating disables timeout delay - no internal pullup/pulldown. |
| 2 (GND) | Ground reference | Primary return path for internal reference and comparator; must be low-impedance for accurate threshold sensing. |
| 3 (VCC1) | Internal supply tie | Must be connected directly to Pin 4 (VCC); not functional as independent input - internal connection only. |
| 4 (VCC) | Supply voltage & monitor input | Monitored rail; reset asserts when VCC < 2.93 V; device remains functional down to 0.5 V. |
| 5 (Reset) | Open-drain reset output | Active-low signal; requires external pullup (0.68–68 kΩ) to VCC or another logic rail; sinks ≤10 mA. |
Key Features
| Feature | Design Value |
|---|---|
| ±1% reset threshold accuracy | Guaranteed over full –40°C to +85°C range - eliminates need for system-level calibration in industrial and automotive applications. |
| Programmable reset timeout | Adjustable from ~1 ms to >1 s using single ceramic capacitor - replaces fixed-delay supervisors and simplifies BOM. |
| 0.5 V minimum operating voltage | Enables supervision of deeply discharged batteries or low-power MCU domains - supports graceful shutdown before data loss. |
| 16 µA typical supply current | Reduces standby power by >90% vs. legacy supervisors - critical for always-on IoT edge nodes and wearables. |
| Open-drain output with 30 µA leakage max | Allows shared reset bus across multiple ICs and supports mixed-voltage system architectures without level shifters. |
Applications
| Microprocessor Power-On Reset | Battery-Powered Instrumentation |
|---|---|
|
Use Scenario: Ensuring clean boot sequence for ARM Cortex-M or RISC-V MCUs after cold start or brownout. IC Role / Device Role / Timing Role: Monitors main 3.3 V supply and holds reset until voltage stabilizes above 2.93 V, then extends assertion for programmable duration. Use Value: Prevents CPU lockup or flash corruption by guaranteeing stable VCC and clock before instruction fetch begins. |
Use Scenario: Supervising coin-cell or Li-SOCl₂ powered handheld meters with multi-year shelf life. IC Role / Device Role / Timing Role: Detects end-of-life battery drop below 2.93 V and triggers controlled shutdown or low-battery alert. Use Value: Extends usable battery capacity by 12–18% versus fixed-threshold supervisors due to tight ±1% tolerance and low 16 µA ICC. |
| Industrial PLC I/O Module | Portable Medical Sensor Hub |
|
Use Scenario: Monitoring 5 V backplane supply in DIN-rail mounted controllers exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Provides robust reset under –25°C to +70°C operation with immunity to 100 ns VCC glitches from relay switching noise. Use Value: Eliminates field failures caused by marginal reset timing - verified per JEDEC JESD22-C101 (200 V CDM) and JS-001 (2000 V HBM). |
Use Scenario: Supervising dual-rail (1.8 V core / 3.3 V analog) supply in FDA-cleared wearable ECG patch. IC Role / Device Role / Timing Role: Monitors 3.3 V analog rail; asserts reset if voltage dips during RF transmission burst, preventing ADC saturation or data loss. Use Value: Meets IEC 60601-1 essential performance requirements for supply integrity with <100 µs response latency (tPD = 100–300 µs). |
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; internal 200 ms timeout; 2.5 µA ICC; same SOT-23-5 package. | Lacks programmable timeout and 2.93 V threshold - unsuitable where precise brownout point or custom delay is required. | Choose for ultra-low-power, fixed-threshold designs where 3.3 V match suffices and PCB layout reuse is critical. |
| MAX6326UT29D3+T | 2.93 V threshold; fixed 140 ms timeout; 1.6 µA ICC; SC70-5 package (smaller footprint, different pinout). | SC70-5 requires board redesign; no external timeout adjustment - limits flexibility in timing-critical systems. | Prefer when minimizing board area and quiescent current are top priorities, and fixed delay is acceptable. |
Compared with TPS3808G33DBVR and MAX6326UT29D3+T, LP3470IM5X-2.93/S4000050 uniquely delivers ±1% threshold accuracy at 2.93 V with user-programmable reset hold time - making it the only option among the three that supports both precision brownout detection and application-specific timing without firmware or external logic.
Availability
LP3470IM5X-2.93/S4000050 is available at Aetrix Electronics and suitable for microprocessor power monitoring, portable instrumentation, industrial PLC modules, and portable medical sensor hubs requiring stable component supply and long-term obsolescence management.
Supply support for LP3470IM5X-2.93/S4000050 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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in power management and supervisory ICs.
The LP3470 product line was designed specifically for high-accuracy, low-power voltage supervision in space-constrained, battery-sensitive applications - emphasizing threshold stability, transient immunity, and minimal quiescent consumption.
FAQ
What is the exact reset threshold voltage of LP3470IM5X-2.93/S4000050?
The LP3470IM5X-2.93/S4000050 has a factory-programmed reset threshold of 2.93 V with ±1% accuracy over the full operating temperature range (–40°C to +85°C), as specified in Section 6.5 of the SNVS003G datasheet. This value is trimmed during production and does not require external calibration.
Does LP3470IM5X-2.93/S4000050 require an external capacitor to function?
LP3470IM5X-2.93/S4000050 does not require an external capacitor to assert reset - it functions immediately upon VCC drop below 2.93 V. However, a capacitor on the SRT pin is required only if a programmable reset timeout (tRP) is needed; otherwise, SRT may be left floating per datasheet Section 5.
What is the recommended pullup resistor value for the Reset pin of LP3470IM5X-2.93/S4000050?
The Reset pin of LP3470IM5X-2.93/S4000050 requires an external pullup resistor between 0.68 kΩ and 68 kΩ, with 20 kΩ being typical. This ensures the output MOSFET stays within its 10 mA sink limit while maintaining logic-high voltage under maximum leakage (6 µA) across temperature, as detailed in Section 7.3.3.
Can LP3470IM5X-2.93/S4000050 operate with a 1.8 V supply?
No - LP3470IM5X-2.93/S4000050 requires VCC ≥ 0.5 V to maintain reset validity but is specified for operation up to 5.5 V. Its 2.93 V threshold means it cannot supervise 1.8 V rails; for such use cases, TI's TPS3808G18 or MAX6326UT18D3+T are appropriate alternatives.
Is LP3470IM5X-2.93/S4000050 pin-compatible with other LP3470 variants?
Yes - all LP3470 variants, including LP3470IM5X-2.93/S4000050, share identical SOT-23-5 (DBV) pinout and electrical behavior except for reset threshold voltage. The pin configuration (SRT/GND/VCC1/VCC/Reset) and functional descriptions are fully consistent across the family per Section 5 of SNVS003G.
LP3470IM5X-2.93/S4000050 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
LP3470IM5X-2.93/S4000050 FAQ
1.How can I place an order for LP3470IM5X-2.93/S4000050 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3470IM5X-2.93/S4000050 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-2.93/S4000050 reliable?
The price and inventory of LP3470IM5X-2.93/S4000050 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3470IM5X-2.93/S4000050 is usually 5 days.
3.What payment methods are accepted for LP3470IM5X-2.93/S4000050?
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Once your LP3470IM5X-2.93/S4000050 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-2.93/S4000050?
For technical support, including LP3470IM5X-2.93/S4000050 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470IM5X-2.93/S4000050 requirements.
6.How does Aetrix verify that LP3470IM5X-2.93/S4000050 is sourced from the original manufacturer or authorized distributors?
All LP3470IM5X-2.93/S4000050 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-2.93/S4000050 meets industry standards.
7.What is the process for return or replacement of LP3470IM5X-2.93/S4000050?
All LP3470IM5X-2.93/S4000050 units undergo pre-shipment inspection (PSI). If there is an issue with LP3470IM5X-2.93/S4000050, 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-2.93/S4000050 part is unused and in its original packaging.
Return procedure for LP3470IM5X-2.93/S4000050:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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