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Texas Instruments LP3470IM5X-4.00/NOPB
- Part No.:
- LP3470IM5X-4.00/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP3470IM5X-4.00/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,733
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Product details
Overview
LP3470IM5X-4.00/NOPB from Texas Instruments is a micropower voltage supervisor IC with 4.00 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 reliable power-on-reset (POR) and brownout protection in microprocessor systems.
For engineers reviewing the LP3470IM5X-4.00/NOPB datasheet, LP3470IM5X-4.00/NOPB pinout, LP3470IM5X-4.00/NOPB application, or LP3470IM5X-4.00/NOPB equivalent, key selection criteria include reset threshold accuracy over temperature, low quiescent current (16 µA typ), immunity to short VCC transients, and SOT-23-5 package compatibility with space-constrained embedded designs.
Technical Context
The LP3470IM5X-4.00/NOPB implements a precision bandgap-based voltage reference with hysteresis (35 mV typ) and a delay timer controlled by an external capacitor on the SRT pin. Its reset assertion logic ensures monotonic behavior during VCC ramp-up and recovery from brownout events.
It features a dedicated open-drain N-channel MOSFET output stage requiring an external pullup resistor (0.68–68 kΩ), and its internal circuitry remains functional even as VCC drops to 0.5 V - enabling robust supervision across wide supply ranges in battery-powered and industrial systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.00 V ±1% over –40°C to +85°C - ensures precise POR activation at nominal system rail voltage. |
| 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 low-voltage rails and deep brownout detection. |
| Reset Output Type | Open-drain, active-low - allows wired-OR configuration and flexible voltage-level translation. |
| Hysteresis | 35 mV typical - prevents chatter during slow VCC recovery near threshold. |
| VCC to Reset Delay | 100 µs typical - provides fast response to supply collapse without false triggering. |
| Reset Time-Out Period | Programmable via external capacitor (tRP = 2000 × C1, C1 in µF, tRP in ms) - enables design-specific hold times after power recovery. |
Pinout & Package
LP3470IM5X-4.00/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 reset hold time; floating disables delay. |
| 2 - GND | Ground reference | Primary return path for internal reference and output stage; must be low-impedance. |
| 3 - VCC1 | Internal supply connection | Internally tied to VCC (Pin 4); must be connected externally per datasheet layout guidance. |
| 4 - VCC | Supply voltage and monitor input | Monitored rail input; device operates and asserts reset when this voltage falls below 4.00 V ±1%. |
| 5 - Reset | Open-drain reset output | Active-low signal; requires external pullup to VCC or another logic rail for proper interface. |
Key Features
| Feature | Design Value |
|---|---|
| ±1% reset threshold accuracy over temperature | Guarantees consistent POR timing across –40°C to +85°C without calibration. |
| Programmable reset time-out period | Enables precise control of reset assertion duration (e.g., 2 ms with 1 nF) to match processor requirements. |
| Immunity to short VCC transients | Rejects sub-microsecond negative glitches up to specified amplitude, reducing false resets in noisy environments. |
| Valid reset output down to VCC = 0.5 V | Ensures clean reset assertion during deep undervoltage conditions where many supervisors fail. |
| Low 16 µA quiescent current | Minimizes standby power draw in always-on monitoring applications such as IoT edge nodes. |
Applications
| Microprocessor Power Monitoring | Portable Battery-Powered Equipment |
|---|---|
Use Scenario: Supervising 3.3 V or 5 V supply rails feeding ARM Cortex-M or RISC-V microcontrollers during cold start and brownout events. IC Role / Device Role / Timing Role: Voltage supervisor providing power-on-reset and watchdog-style reset hold after supply recovery. Use Value: Prevents CPU lockup or corrupted firmware execution by ensuring stable clock and supply before release from reset. | Use Scenario: Monitoring Li-ion battery discharge in handheld medical devices or wireless sensors operating down to 3.0 V. IC Role / Device Role / Timing Role: Precision threshold detector with 4.00 V trip point and adjustable delay to coordinate graceful shutdown sequencing. Use Value: Extends usable battery capacity by avoiding premature shutdown while guaranteeing safe minimum operating voltage. |
| Industrial Control Systems | Intelligent Instrumentation |
Use Scenario: Ensuring deterministic startup of PLC I/O modules powered from isolated DC-DC converters subject to line transients. IC Role / Device Role / Timing Role: Immune-to-glitch supervisor that maintains reset state during brief AC line sags or EFT bursts. Use Value: Eliminates spurious reboots in factory-floor environments, improving system uptime and diagnostic reliability. | Use Scenario: Providing POR and supply integrity validation in handheld multimeters and oscilloscope front-ends. IC Role / Device Role / Timing Role: Low-power supervisory element with minimal board footprint and no external bias components beyond pullup resistor. Use Value: Reduces BOM count and PCB area while meeting stringent accuracy and stability requirements for metrology-grade instruments. |
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; 350 ms min factory-programmed delay; higher ICC (1.3 µA typ) | Not suitable for 4.00 V rail supervision; better for fixed-delay, ultra-low-ICC applications | Select only if 3.3 V threshold and non-programmable delay meet system requirements. |
| MAX6326UT40D3+T | 4.00 V threshold; 140 ms min factory-programmed delay; push-pull output; higher ICC (2.5 µA typ) | Lacks programmable delay and open-drain flexibility; requires different reset interface topology | Choose when push-pull output simplifies design and fixed delay suffices for processor timing. |
Compared with TPS3808G33DBVR and MAX6326UT40D3+T, LP3470IM5X-4.00/NOPB uniquely combines 4.00 V ±1% accuracy, user-programmable reset hold time, open-drain output, and sub-20 µA quiescent current - making it optimal for cost-sensitive, space-constrained, and battery-aware designs requiring full POR configurability.
Availability
LP3470IM5X-4.00/NOPB is available at Aetrix Electronics and suitable for microprocessor power monitoring, portable battery-powered equipment, and industrial control systems requiring stable component supply and long-term manufacturability.
Supply support for LP3470IM5X-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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
LP3470IM5X-4.00/NOPB belongs to TI's voltage supervisor product line, engineered for high-accuracy, low-power, and glitch-immune power monitoring in resource-constrained embedded systems.
FAQ
What is the reset threshold voltage of LP3470IM5X-4.00/NOPB?
The LP3470IM5X-4.00/NOPB has a factory-programmed reset threshold of 4.00 V with ±1% accuracy over the full operating temperature range of –40°C to +85°C. This value is guaranteed by production testing and applies to all units shipped under this orderable part number. The LP3470IM5X-4.00/NOPB uses a precision bandgap reference to maintain tight tolerance without external calibration.
How do I configure the reset time-out period for LP3470IM5X-4.00/NOPB?
The reset time-out period for LP3470IM5X-4.00/NOPB is set by connecting an external capacitor between the SRT pin (Pin 1) 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. The LP3470IM5X-4.00/NOPB datasheet recommends ceramic capacitors rated ≥10 V.
Does LP3470IM5X-4.00/NOPB support operation below 1 V?
Yes, LP3470IM5X-4.00/NOPB guarantees valid reset output functionality down to VCC = 0.5 V, and its recommended operating range starts at 0.5 V. This capability allows reliable brownout detection in ultra-low-voltage subsystems and extends usability into deep discharge states of primary batteries. The LP3470IM5X-4.00/NOPB maintains ±1% threshold accuracy and functional reset assertion even at these low supply levels.
What type of output does LP3470IM5X-4.00/NOPB have, and how should it be interfaced?
LP3470IM5X-4.00/NOPB features an open-drain, active-low reset output (Pin 5). It requires an external pullup resistor to VCC or another logic rail - typically 20 kΩ - to ensure proper logic-high level and sink capability within the 10 mA absolute maximum rating. This architecture supports wired-OR configurations and voltage-level translation, making LP3470IM5X-4.00/NOPB compatible with mixed-voltage systems.
Is LP3470IM5X-4.00/NOPB immune to power supply transients?
Yes, LP3470IM5X-4.00/NOPB is specifically designed to reject short-duration negative-going VCC transients (glitches), as documented in its Typical Characteristics (Figure 6). Its internal circuitry filters pulses below defined amplitude/duration thresholds, preventing false resets. Adding a 0.1 µF bypass capacitor close to the VCC pin further enhances transient immunity - a practice confirmed effective in LP3470IM5X-4.00/NOPB application layouts.
LP3470IM5X-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:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LP3470IM5X-4.00/NOPB FAQ
1.How can I place an order for LP3470IM5X-4.00/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3470IM5X-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 LP3470IM5X-4.00/NOPB reliable?
The price and inventory of LP3470IM5X-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 LP3470IM5X-4.00/NOPB is usually 5 days.
3.What payment methods are accepted for LP3470IM5X-4.00/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470IM5X-4.00/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3470IM5X-4.00/NOPB?
LP3470IM5X-4.00/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3470IM5X-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 LP3470IM5X-4.00/NOPB?
For technical support, including LP3470IM5X-4.00/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470IM5X-4.00/NOPB requirements.
6.How does Aetrix verify that LP3470IM5X-4.00/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3470IM5X-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 LP3470IM5X-4.00/NOPB meets industry standards.
7.What is the process for return or replacement of LP3470IM5X-4.00/NOPB?
All LP3470IM5X-4.00/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3470IM5X-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 LP3470IM5X-4.00/NOPB part is unused and in its original packaging.
Return procedure for LP3470IM5X-4.00/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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