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Texas Instruments LP3470M5X-2.93
- Part No.:
- LP3470M5X-2.93
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP3470M5X-2.93.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,481
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Product details
Overview
LP3470M5X-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 (tRP = 2000 × C1), and operates down to VCC = 0.5 V - enabling reliable supervision in battery-powered and low-voltage embedded applications.
For engineers reviewing the LP3470M5X-2.93 datasheet, LP3470M5X-2.93 pinout, LP3470M5X-2.93 application, or LP3470M5X-2.93 equivalent, this device delivers precise supply monitoring with immunity to short VCC transients, low 16 µA quiescent current, and SOT-23 (DBV) 5-pin packaging suitable for space-constrained PCB layouts.
Technical Context
The LP3470M5X-2.93 implements a precision bandgap-based voltage reference and comparator architecture to achieve ±1% reset threshold accuracy over –20°C to 85°C. Its reset assertion logic includes built-in hysteresis (15–65 mV) to prevent chatter during supply recovery.
Reset timing is fully decoupled from internal circuitry: the SRT pin accepts an external capacitor to set tRP (2 ms typical with 1 nF), while the open-drain Reset output requires an external pullup resistor (0.68–68 kΩ) to interface with µP reset inputs or logic-level systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93 V ±1% over temperature - ensures deterministic system reset at precisely defined supply level, eliminating manual calibration. |
| Quiescent Current | 16 µA typical at 4.5 V - enables multi-year operation in coin-cell or energy-harvesting applications without compromising supervision integrity. |
| Operating Voltage Range | 0.5 V to 5.5 V - guarantees valid reset assertion even during deep brownout or ultra-low-power wake-up sequences. |
| Reset Output Type | Open-drain, active-low - allows wired-OR configuration, level translation, and compatibility with diverse µP reset input architectures. |
| Reset Timeout Control | Externally programmable via capacitor on SRT pin (tRP = 2000 × C1, C1 in µF) - provides design flexibility without firmware or additional ICs. |
| Hysteresis Voltage | 15–65 mV - prevents oscillatory reset behavior during slow-rising or noisy supply rails. |
| VCC Transient Immunity | Immune to short negative-going VCC glitches - reduces false resets in electrically noisy environments like motor drives or switching supplies. |
Pinout & Package
LP3470M5X-2.93 is housed in a 5-pin SOT-23 (DBV) package measuring 1.60 mm × 2.90 mm, optimized for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SRT | Reset timeout programming input | Connect external capacitor to GND to set tRP; floating disables timeout delay - enables hardware-configurable reset hold time without software intervention. |
| 2 - GND | Ground reference | Primary return path for internal reference and comparator; must be low-impedance to ensure threshold accuracy and noise immunity. |
| 3 - VCC1 | Internal supply tie | Must be connected directly to VCC (Pin 4); not user-accessible - ensures internal bias generation remains synchronized with monitored supply. |
| 4 - VCC | Supply voltage monitor input | Monitored rail; reset asserts when VCC falls below 2.93 V - serves as both power source and supervision target in single-supply systems. |
| 5 - Reset | Open-drain reset output | Active-low signal requiring external pullup; sinks ≤10 mA - interfaces directly with ARM Cortex-M, PIC, MSP430, and other µP reset pins. |
Key Features
| Feature | Design Value |
|---|---|
| ±1% reset threshold accuracy | Maintains tight reset window across –20°C to 85°C, eliminating need for derating or margin-based design in industrial temperature ranges. |
| Programmable reset timeout | Enables precise hold-time tuning (e.g., 200 ms with 100 nF) to match µP reset requirements without firmware delays or external timers. |
| 0.5 V minimum operating voltage | Guarantees reset assertion during final stages of battery discharge or low-VIN LDO dropout, preventing undefined µP states. |
| 16 µA typical supply current | Reduces standby power by >90% versus discrete supervisor solutions, critical for IoT edge nodes with multi-year battery life targets. |
| Open-drain output with 10 mA sink capability | Supports direct connection to 1.8 V, 3.3 V, or 5 V logic families using a single pullup resistor - simplifies level-shifting and bus interfacing. |
Applications
| Microprocessor Power-On Reset | Battery-Powered Instrumentation |
|---|---|
|
Use Scenario: Ensuring clean boot sequence for ARM-based controllers in portable test equipment after battery insertion or cold start. IC Role / Device Role / Timing Role: Monitors main 3.3 V supply rail and holds µP in reset until voltage stabilizes above 2.93 V, then extends reset for 200 ms via 100 nF SRT capacitor. Use Value: Prevents flash corruption and register lockup during marginal power conditions, improving field reliability without firmware overhead. |
Use Scenario: Supervising lithium coin-cell (CR2032) powered sensor nodes with intermittent BLE transmission. IC Role / Device Role / Timing Role: Detects end-of-life voltage sag (<2.93 V) and forces controlled shutdown before data loss, while drawing only 16 µA during sleep. Use Value: Extends usable battery life by 12+ months compared to fixed-threshold supervisors with higher IQ or looser tolerance. |
| Industrial PLC I/O Module | Medical Point-of-Care Device |
|
Use Scenario: Protecting digital I/O drivers in DIN-rail mounted controllers exposed to 24 V DC supply ripple and EFT bursts. IC Role / Device Role / Timing Role: Acts as primary POR element for FPGA configuration logic, asserting reset during line sags and rejecting sub-µs transients per Figure 6. Use Value: Eliminates spurious reconfiguration events caused by switching noise, reducing MTBF-related service calls in harsh factory environments. |
Use Scenario: Guaranteeing safe initialization of patient-monitoring ASICs after AC/DC adapter hot-plug or battery swap. IC Role / Device Role / Timing Role: Provides fail-safe reset coordination between analog front-end, ADC, and display controller - all released simultaneously after stable 2.93 V rail. Use Value: Meets IEC 62304 Class B software safety requirements by ensuring deterministic hardware-initiated reset prior to firmware execution. |
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; 35 µA IQ; internal 200 ms timeout; no external capacitor option | Lacks programmable delay and tighter 2.93 V threshold - unsuitable where brownout detection must align precisely with 2.93 V LDO output. | Select if board space is constrained and 3.3 V reset suffices; avoid when matching non-standard supply rails or requiring adjustable hold time. |
| MAX6326UT29D3+ | 2.93 V threshold; 1.6 µA IQ; fixed 140 ms timeout; SC70-5 package (smaller footprint) | Lower IQ but no SRT programmability; SC70-5 has higher thermal resistance (RθJA = 290°C/W vs. 171°C/W) - limits power dissipation in sealed enclosures. | Prefer for ultra-low-power wearable designs where timeout is fixed and thermal headroom exists; verify layout cooling for continuous operation. |
Compared with TPS3808G33DBVR and MAX6326UT29D3+, the LP3470M5X-2.93 uniquely balances precision (±1%), ultra-low IQ, and hardware-programmable reset timing in a thermally robust SOT-23 package - making it optimal for cost-sensitive industrial and medical applications requiring exact 2.93 V supervision.
Availability
LP3470M5X-2.93 is available at Aetrix Electronics and suitable for microprocessor power-on-reset, battery-powered instrumentation, and industrial PLC I/O modules requiring stable component supply and long-term obsolescence management.
Supply support for LP3470M5X-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 family was engineered for cost-effective, high-accuracy power supervision in resource-constrained embedded systems - targeting applications where precision threshold, low quiescent current, and programmable timing are critical to system robustness.
FAQ
What is the guaranteed operating temperature range for LP3470M5X-2.93?
The LP3470M5X-2.93 is specified for operation from –20°C to +85°C, with reset threshold accuracy maintained at ±1% across this full range. This rating is confirmed in Section 6.3 (Recommended Operating Conditions) of the SNVS003G datasheet and applies specifically to the M-suffix variant, distinguishing it from the wider –40°C to +85°C I-suffix versions.
Can LP3470M5X-2.93 be used with a 1.8 V supply rail?
No - the LP3470M5X-2.93 requires VCC ≥ 2.93 V to assert a valid reset; its 2.93 V threshold means it cannot supervise rails below that voltage. For 1.8 V systems, TI recommends the LP3470M5X-1.83 variant (if available) or alternative supervisors like TPS3801K33, which are explicitly rated for lower thresholds.
How do I calculate the reset timeout period for LP3470M5X-2.93?
Use the formula tRP (ms) = 2000 × C1, where C1 is the capacitor value in µF connected between SRT (Pin 1) and GND. For example, a 47 nF capacitor yields tRP = 2000 × 0.047 = 94 ms. This relationship is validated in Section 7.3.1 and Table 6-5 of the LP3470M5X-2.93 datasheet.
What is the maximum allowable pullup resistor value for the Reset pin of LP3470M5X-2.93?
The maximum recommended pullup resistor is 68 kΩ, as stated in Section 7.3.3 and Table 6-5. This ensures the Reset pin achieves a valid logic high under worst-case leakage (6 µA at temperature extremes). Values above 68 kΩ risk insufficient voltage rise, especially at elevated temperatures or with long PCB traces.
Is LP3470M5X-2.93 RoHS compliant and lead-free?
Yes - the /NOPB suffix in LP3470M5X-2.93/NOPB confirms lead-free (Pb-free) construction and full compliance with EU RoHS Directive 2011/65/EU. The "Green (RoHS & no Sb/Br)" eco plan and "CU SN" lead finish are documented in TI's Package Option Addendum for this orderable part.
LP3470M5X-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
LP3470M5X-2.93 FAQ
1.How can I place an order for LP3470M5X-2.93 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3470M5X-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 LP3470M5X-2.93 reliable?
The price and inventory of LP3470M5X-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 LP3470M5X-2.93 is usually 5 days.
3.What payment methods are accepted for LP3470M5X-2.93?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470M5X-2.93 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3470M5X-2.93?
LP3470M5X-2.93 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3470M5X-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 LP3470M5X-2.93?
For technical support, including LP3470M5X-2.93 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470M5X-2.93 requirements.
6.How does Aetrix verify that LP3470M5X-2.93 is sourced from the original manufacturer or authorized distributors?
All LP3470M5X-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 LP3470M5X-2.93 meets industry standards.
7.What is the process for return or replacement of LP3470M5X-2.93?
All LP3470M5X-2.93 units undergo pre-shipment inspection (PSI). If there is an issue with LP3470M5X-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 LP3470M5X-2.93 part is unused and in its original packaging.
Return procedure for LP3470M5X-2.93:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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