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Texas Instruments LP3470M5X-3.08/NOPB
- Part No.:
- LP3470M5X-3.08/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP3470M5X-3.08/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:8,517
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Product details
Overview
LP3470M5X-3.08/NOPB from Texas Instruments is a micropower voltage supervisor IC with 3.08 V ±1% reset threshold, programmable reset time-out via external capacitor, open-drain active-low reset output, and operation down to VCC = 0.5 V - used for power-on-reset (POR) and brownout protection in microprocessor systems.
For engineers reviewing the LP3470M5X-3.08/NOPB datasheet, LP3470M5X-3.08/NOPB pinout, LP3470M5X-3.08/NOPB application, or LP3470M5X-3.08/NOPB equivalent, key selection criteria include reset accuracy over temperature, quiescent current (16 µA typ), SOT-23-5 package compatibility, and immunity to short VCC transients.
Technical Context
The LP3470M5X-3.08/NOPB implements a precision bandgap-based voltage reference with hysteresis (35 mV typ) and internal delay timing controlled by an external capacitor on the SRT pin. Its reset assertion logic ensures reliable POR during power ramp-up and recovery after brownout events.
It features a dedicated open-drain N-channel MOSFET output stage requiring an external pullup resistor (0.68–68 kΩ), and its VCC monitoring path remains functional even at supply voltages as low as 0.5 V - enabling robust supervision in ultra-low-voltage battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 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 battery life in portable equipment. |
| Operating Voltage Range | 0.5 V to 5.5 V - supports supervision of deeply discharged batteries and standard logic rails. |
| Reset Output Type | Open-drain, active-low - allows wired-OR configuration and flexible voltage-level translation. |
| Hysteresis Voltage | 35 mV typical - prevents chatter during slow VCC recovery near threshold. |
| VCC to Reset Delay | 100 µs typical - provides fast response to supply collapse while rejecting sub-µs noise. |
| Reset Time-Out Period | Programmable via external capacitor (tRP = 2000 × C1, C1 in µF, tRP in ms) - enables system-specific POR hold times. |
Pinout & Package
LP3470M5X-3.08/NOPB is housed in a 5-pin SOT-23 (DBV) package, 1.60 mm × 2.90 mm body size, with moisture sensitivity level (MSL) 1 and lead finish Sn (matte tin).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SRT | Reset time-out programming input | Connect external capacitor to ground to set tRP; floating disables delay. |
| 2 - GND | Ground reference | Primary return path for internal reference and output stage; must be low-impedance. |
| 3 - VCC1 | Internal supply tie | Must be connected directly to VCC (Pin 4); no external connection required. |
| 4 - VCC | Supply voltage and monitor input | Monitored rail; device operates and asserts reset when VCC falls below 3.08 V. |
| 5 - Reset | Open-drain active-low output | Drives low during reset; requires external pullup to VCC or another logic rail. |
Key Features
| Feature | Design Value |
|---|---|
| ±1% reset threshold accuracy | Maintains tight supervision margin across industrial temperature range (–20°C to 85°C), reducing false resets. |
| Programmable reset time-out | Enables system-specific POR duration (e.g., 2 ms with 1 nF) without firmware or additional logic. |
| Immunity to short VCC transients | Rejects glitches ≤100 ns at –100 mV amplitude (per Figure 6), improving reliability in noisy environments. |
| Valid reset down to VCC = 0.5 V | Ensures clean reset assertion even during deep brownout or battery depletion scenarios. |
| Low quiescent current | 16 µA typical consumption minimizes standby power loss in always-on supervisory circuits. |
Applications
| Microprocessor Power Monitoring | Portable Battery Systems |
|---|---|
Use Scenario: Monitoring 3.3 V supply rail powering an ARM Cortex-M4 MCU during cold start and battery discharge. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset until VCC stabilizes above 3.08 V and holds for programmable delay. Use Value: Prevents CPU lockup or corrupted boot by guaranteeing minimum valid supply before release. | Use Scenario: Supervising lithium coin-cell (CR2032) output in a wireless sensor node with 2.8–3.2 V operating range. IC Role / Device Role / Timing Role: Brownout detector triggering controlled shutdown when cell voltage drops below 3.08 V. Use Value: Avoids data corruption and flash write errors during gradual battery depletion. |
| Industrial Control PLCs | Medical Diagnostic Handhelds |
Use Scenario: Ensuring deterministic startup of FPGA-based I/O controller after 24 V DC-DC converter stabilization. IC Role / Device Role / Timing Role: POR generator with 100 ms delay (via 0.1 µF on SRT) to accommodate regulator settling time. Use Value: Eliminates race conditions between power rail stability and logic initialization. | Use Scenario: Validating main 3.0 V rail in a portable ECG analyzer before enabling analog front-end and ADC. IC Role / Device Role / Timing Role: Precision supervisor with 3.08 V threshold matching system's analog reference tolerance. Use Value: Guarantees measurement integrity by preventing analog circuit operation outside spec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G30DBVR | Fixed 3.0 V threshold (±0.5%), 350 nA IQ, push-pull output, no external capacitor delay | Lacks programmable delay; better for ultra-low-power always-on systems where fixed timing suffices | Choose if lower quiescent current and push-pull output are prioritized over delay flexibility |
| MAX6326UT31D3+ | 3.08 V threshold (±1.5%), 1.6 µA IQ, open-drain, fixed 200 ms delay, SOT-23-5 | Fixed internal delay eliminates capacitor routing but reduces timing adaptability | Choose if board space is constrained and standardized 200 ms POR is acceptable |
Compared with LP3470M5X-3.08/NOPB, TPS3808G30DBVR offers significantly lower IQ but lacks programmable delay and uses push-pull output, while MAX6326UT31D3+ trades delay flexibility for guaranteed factory-set timing and lower leakage - making each suitable for distinct power and layout constraints.
Availability
LP3470M5X-3.08/NOPB is available at Aetrix Electronics and suitable for microprocessor power monitoring, portable battery systems, and industrial control applications requiring stable component supply and long-term manufacturability.
Supply support for LP3470M5X-3.08/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, embedded processing, and connectivity technologies, with decades of leadership in power management and supervisory ICs.
The LP3470 family was designed for cost-sensitive, space-constrained systems needing high-accuracy, low-power voltage supervision - particularly in battery-powered and industrial microcontroller applications.
FAQ
What is the reset threshold voltage of the LP3470M5X-3.08/NOPB?
The LP3470M5X-3.08/NOPB has a factory-programmed reset threshold of 3.08 V with ±1% accuracy over the operating temperature range of –20°C to 85°C. This value is specified in the Electrical Characteristics table (Section 6.5) and applies to the LP3470 variant (not the LP3470I). The LP3470M5X-3.08/NOPB maintains this precision without external calibration.
How is the reset time-out period programmed on the LP3470M5X-3.08/NOPB?
The reset time-out period (tRP) of the LP3470M5X-3.08/NOPB is set using an external capacitor connected between Pin 1 (SRT) and GND. The relationship is tRP (ms) = 2000 × C1 (µF); for example, a 100 nF capacitor yields 200 ms. Leaving SRT floating disables the delay, causing Reset to deassert immediately after VCC exceeds the threshold.
What is the minimum supply voltage at which the LP3470M5X-3.08/NOPB guarantees reset functionality?
The LP3470M5X-3.08/NOPB guarantees valid reset assertion and deassertion down to VCC = 0.5 V, as confirmed in Section 6.3 (Recommended Operating Conditions) and Section 6.5 (Electrical Characteristics). This enables reliable supervision during deep brownout or battery exhaustion, unlike many supervisors that require ≥1.0 V to operate.
Does the LP3470M5X-3.08/NOPB require an external pullup resistor on the Reset pin?
Yes, the LP3470M5X-3.08/NOPB features an open-drain Reset output (Pin 5) and requires an external pullup resistor to VCC or another logic rail. The datasheet specifies a recommended range of 0.68 kΩ to 68 kΩ, with 20 kΩ being typical. Without this resistor, the Reset signal cannot transition to a valid logic high state.
Is the LP3470M5X-3.08/NOPB RoHS compliant and what is its packaging format?
Yes, the LP3470M5X-3.08/NOPB is RoHS compliant (lead finish: matte tin) and supplied in tape-and-reel format - specifically 3000 units per large reel (SOT-23 DBV package, MSL Level-1, 260°C peak reflow). The part marking is "D28B", and it ships in moisture-barrier packaging per TI's standard shipping protocol.
LP3470M5X-3.08/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:
- 3.08V
- 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-3.08/NOPB FAQ
1.How can I place an order for LP3470M5X-3.08/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3470M5X-3.08/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 LP3470M5X-3.08/NOPB reliable?
The price and inventory of LP3470M5X-3.08/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3470M5X-3.08/NOPB is usually 5 days.
3.What payment methods are accepted for LP3470M5X-3.08/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470M5X-3.08/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3470M5X-3.08/NOPB?
LP3470M5X-3.08/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3470M5X-3.08/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 LP3470M5X-3.08/NOPB?
For technical support, including LP3470M5X-3.08/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470M5X-3.08/NOPB requirements.
6.How does Aetrix verify that LP3470M5X-3.08/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3470M5X-3.08/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 LP3470M5X-3.08/NOPB meets industry standards.
7.What is the process for return or replacement of LP3470M5X-3.08/NOPB?
All LP3470M5X-3.08/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3470M5X-3.08/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 LP3470M5X-3.08/NOPB part is unused and in its original packaging.
Return procedure for LP3470M5X-3.08/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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