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Texas Instruments LP3470M5-4.00/NOPB
- Part No.:
- LP3470M5-4.00/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP3470M5-4.00/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:734
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Product details
Overview
LP3470M5-4.00/NOPB from Texas Instruments is a micropower voltage supervisor IC with 4.00 V ±1% reset threshold, programmable reset timeout via external capacitor, open-drain active-low reset output, and operation down to VCC = 0.5 V. It monitors microprocessor supply rails in battery-powered systems to ensure reliable power-on reset and brownout protection.
For engineers reviewing the LP3470M5-4.00/NOPB datasheet, LP3470M5-4.00/NOPB pinout, LP3470M5-4.00/NOPB application, or LP3470M5-4.00/NOPB equivalent, key selection criteria include reset threshold accuracy over temperature, quiescent current (16 µA typical), immunity to short VCC transients, and compatibility with standard SOT-23-5 PCB footprints and pullup resistor configurations.
Technical Context
The LP3470M5-4.00/NOPB implements a precision bandgap-based voltage reference with hysteresis (35 mV typical) to avoid chatter during threshold crossing. Its internal comparator continuously monitors VCC against the factory-trimmed 4.00 V threshold and asserts Reset low when VCC falls below VRTH − VHYST.
Reset assertion duration is fully programmable via an external capacitor on the SRT pin using tRP (ms) = 2000 × C1 (µF); for example, 1 nF yields 2 ms timeout. The open-drain Reset output requires an external pullup resistor (0.68–68 kΩ), with 20 kΩ recommended for most applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.00 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 devices. |
| 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 - supports wired-OR logic, level translation, and flexible pullup to any compatible rail. |
| VCC to Reset Delay | 100 µs typical - provides fast response to supply collapse while rejecting sub-100 µs noise glitches. |
| Hysteresis Voltage | 35 mV typical - prevents oscillation near threshold during slow-rising/falling VCC transitions. |
| Reset Timeout Programmability | tRP = 2000 × C1 (C1 in µF, tRP in ms) - allows exact POR timing tuning from ~1 ms to seconds without firmware. |
Pinout & Package
LP3470M5-4.00/NOPB 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 reflow profiles (MSL Level-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SRT | Reset timeout programming input | Connect external capacitor to ground; sets tRP per tRP = 2000 × C1 (µF). Leave floating for minimum delay. |
| 2 - GND | Power ground reference | Common return path for internal reference and comparator; must be low-impedance connection to system ground plane. |
| 3 - VCC1 | Internal supply tie | Must be shorted to VCC (Pin 4); not functional as independent input - internal connection only. |
| 4 - VCC | Supply voltage and monitor input | Primary power rail under supervision; also powers internal circuitry; valid down to 0.5 V. |
| 5 - Reset | Open-drain reset output | Active-low signal asserted when VCC < VRTH; requires external pullup (e.g., 20 kΩ to VCC) for logic-high state. |
Key Features
| Feature | Design Value |
|---|---|
| ±1% reset threshold accuracy | Guaranteed over full operating temperature range (−20°C to 85°C), eliminating need for external trimming or calibration. |
| Programmable reset timeout | Adjustable from milliseconds to seconds using one external capacitor - no firmware or additional ICs required. |
| Immunity to short VCC transients | Rejects negative-going glitches ≤100 ns at −200 mV amplitude (per Figure 6), reducing false resets in noisy environments. |
| Low-voltage reset validity | Asserts valid Reset signal even when VCC drops to 0.5 V - critical for detecting deep brownout before system lockup. |
| Open-drain output architecture | Enables direct interface with 1.8 V, 3.3 V, or 5 V logic families and supports multiple supervisors sharing one reset bus. |
Applications
| Microprocessor Power-On Reset | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Ensuring clean boot sequence for ARM Cortex-M or RISC-V microcontrollers after cold start or wake-from-sleep. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset until VCC stabilizes above 4.00 V and holds for programmable timeout. Use Value: Prevents code execution at marginal voltage, avoiding corrupted register states or flash write errors during power ramp. |
Use Scenario: Maintaining system integrity in handheld multimeters or portable gas analyzers powered by single Li-ion cells. IC Role / Device Role / Timing Role: Monitoring declining battery voltage and triggering controlled shutdown before undervoltage lockout. Use Value: Extends usable battery life by enabling graceful data save and peripheral disable prior to cutoff at ~4.0 V. |
| Industrial Control I/O Modules | Network Edge Sensor Nodes |
Use Scenario: Securing deterministic startup of PLC digital I/O cards exposed to 24 V DC supply ripple and transient coupling. IC Role / Device Role / Timing Role: Supervising local 3.3 V LDO output feeding FPGA configuration logic and communication interfaces. Use Value: Eliminates metastability in FPGA configuration state machines by guaranteeing minimum reset pulse width post-power stabilization. |
Use Scenario: Enabling reliable wake-up and sensor initialization in LoRaWAN or NB-IoT nodes deployed in remote locations. IC Role / Device Role / Timing Role: Providing synchronized reset to MCU and RF transceiver after supercapacitor recharge or energy harvesting event. Use Value: Ensures consistent timing alignment between sensor sampling, ADC conversion, and radio transmit windows. |
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; 200 ms factory-programmed timeout; higher ICC (2.5 µA min, but 12 µA typ) | Lacks external timeout adjustability; better suited for cost-sensitive fixed-timing designs | Choose when 3.3 V threshold matches system rail and programmable delay is unnecessary. |
| MAX6326UT41D3+T | 4.08 V threshold (±2.5%); no external capacitor programming; push-pull output; higher ICC (12 µA typ) | Requires no external components but offers less timing flexibility and lower accuracy than LP3470M5-4.00/NOPB | Prefer when board space is extremely constrained and ±2.5% threshold tolerance is acceptable. |
Compared with TPS3808G33DBVR and MAX6326UT41D3+T, LP3470M5-4.00/NOPB delivers tighter threshold accuracy (±1% vs ±2.5%), lower quiescent current (16 µA vs ≥12 µA), and field-adjustable reset timing - making it optimal for precision, low-power, and design-flexible applications.
Availability
LP3470M5-4.00/NOPB is available at Aetrix Electronics and suitable for industrial control I/O modules, battery-powered instrumentation, and network edge sensor nodes requiring stable component supply across extended product lifecycles.
Supply support for LP3470M5-4.00/NOPB 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 decades of leadership in power management and supervisory ICs.
The LP3470 series was designed specifically for high-accuracy, low-quiescent-current voltage monitoring in microprocessor-based systems where reliability during power transitions is critical.
FAQ
What is the guaranteed reset threshold accuracy of LP3470M5-4.00/NOPB over temperature?
The LP3470M5-4.00/NOPB guarantees ±1% reset threshold accuracy across its operating temperature range of −20°C to 85°C. This specification is ensured via factory trimming and correlation testing, not just 25°C characterization, making LP3470M5-4.00/NOPB suitable for applications demanding tight voltage monitoring without external calibration.
Can LP3470M5-4.00/NOPB operate with a supply voltage below 1.0 V?
Yes - LP3470M5-4.00/NOPB asserts a valid Reset signal down to VCC = 0.5 V, as confirmed in Section 6.5 Electrical Characteristics. This capability ensures robust brownout detection even during deep discharge of lithium batteries or ultra-low-power system wake-up sequences, a feature explicitly validated in the LP3470M5-4.00/NOPB datasheet.
How is the reset timeout period set for LP3470M5-4.00/NOPB?
The reset timeout period (tRP) of LP3470M5-4.00/NOPB is set by connecting an external capacitor between Pin 1 (SRT) and GND. The relationship is tRP (ms) = 2000 × C1 (µF); for example, a 100 nF capacitor yields 200 ms. If no delay is needed, SRT must be left floating - no resistor or other component is required.
What pullup resistor value is recommended for the Reset output of LP3470M5-4.00/NOPB?
A 20 kΩ pullup resistor to VCC is recommended for the Reset output of LP3470M5-4.00/NOPB, as specified in Section 7.3.3. This value balances leakage current handling (R1 ≤ 68 kΩ) and output MOSFET current limiting (R1 ≥ 680 Ω), ensuring reliable logic-high levels while staying within the 10 mA absolute maximum sink rating.
Is LP3470M5-4.00/NOPB pin-compatible with other members of the LP3470 family?
Yes - all LP3470 variants, including LP3470M5-4.00/NOPB, share identical 5-pin SOT-23 (DBV) packaging and pinout. The only differences are factory-set reset thresholds (e.g., 2.63 V, 3.08 V, 4.00 V) and temperature grade (M-grade: 0°C to 0°C ambient, per orderable info). No PCB layout change is needed when substituting within the same package variant.
LP3470M5-4.00/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4V
- 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
LP3470M5-4.00/NOPB FAQ
1.How can I place an order for LP3470M5-4.00/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3470M5-4.00/NOPB 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 LP3470M5-4.00/NOPB reliable?
The price and inventory of LP3470M5-4.00/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3470M5-4.00/NOPB is usually 5 days.
3.What payment methods are accepted for LP3470M5-4.00/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470M5-4.00/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3470M5-4.00/NOPB?
LP3470M5-4.00/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3470M5-4.00/NOPB 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 LP3470M5-4.00/NOPB?
For technical support, including LP3470M5-4.00/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470M5-4.00/NOPB requirements.
6.How does Aetrix verify that LP3470M5-4.00/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3470M5-4.00/NOPB 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 LP3470M5-4.00/NOPB meets industry standards.
7.What is the process for return or replacement of LP3470M5-4.00/NOPB?
All LP3470M5-4.00/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3470M5-4.00/NOPB, 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 LP3470M5-4.00/NOPB part is unused and in its original packaging.
Return procedure for LP3470M5-4.00/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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