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Texas Instruments LP3470IM5-4.00
- Part No.:
- LP3470IM5-4.00
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP3470IM5-4.00.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,485
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Product details
Overview
LP3470IM5-4.00 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 - used for reliable power-on-reset (POR) and brownout protection in microprocessor systems.
For engineers reviewing the LP3470IM5-4.00 datasheet, LP3470IM5-4.00 pinout, LP3470IM5-4.00 application, or LP3470IM5-4.00 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 PCB footprints.
Technical Context
The LP3470IM5-4.00 implements a precision bandgap-based voltage reference with hysteresis (35 mV typical) 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 an open-drain N-channel MOSFET output requiring an external pullup resistor (0.68–68 kΩ), operates across –40°C to +85°C, and maintains reset validity even when VCC drops as low as 0.5 V - enabling robust supervision in low-voltage and battery-powered environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.00 V ±1% over –40°C to +85°C - ensures accurate 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 during deep brownout and ultra-low-power wake-up sequences. |
| Hysteresis | 35 mV typical - prevents reset chatter near threshold during noisy or slowly recovering supply conditions. |
| VCC to Reset Delay | 100 µs typical - guarantees fast fault detection for critical µP initialization timing. |
| Reset Output Type | Open-drain, active-low - allows wired-OR configuration and flexible voltage-level translation. |
| Reset Timeout Control | Externally programmable via capacitor on SRT pin (tRP = 2000 × C1, C1 in µF, tRP in ms) - provides design-adjustable hold time without firmware dependency. |
Pinout & Package
LP3470IM5-4.00 is housed in a 5-pin SOT-23 (DBV) package, 1.60 mm × 2.90 mm body size, RoHS-compliant, with moisture sensitivity level (MSL) 1 and peak reflow rating of 260°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SRT) | Reset timeout programming input | Connect external capacitor to ground to set reset hold time; floating disables timeout 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); not user-accessible for external biasing. |
| 4 (VCC) | Supply voltage & threshold monitor input | Monitored rail input; device functions down to 0.5 V and asserts reset below 4.00 V ±1%. |
| 5 (Reset) | Open-drain reset output | Active-low signal; requires external pullup (20 kΩ typical) to VCC or another logic rail. |
Key Features
| Feature | Design Value |
|---|---|
| ±1% reset threshold accuracy over temperature | Eliminates need for system-level calibration and ensures consistent POR timing across environmental extremes. |
| Programmable reset timeout using external capacitor | Enables precise, application-specific reset hold durations (e.g., 2 ms with 1 nF) without modifying firmware or layout. |
| Immunity to short VCC transients | Rejects sub-microsecond negative glitches up to specified amplitude, preventing spurious resets in electrically noisy environments. |
| Low 16 µA quiescent current | Minimizes standby power draw - critical for coin-cell or energy-harvesting applications where µA-level leakage matters. |
| Reset valid down to VCC = 0.5 V | Guarantees clean reset assertion during deep undervoltage events, supporting safe shutdown before logic corruption occurs. |
Applications
| Microprocessor Power Monitoring | Portable Battery-Powered Equipment |
|---|---|
Use Scenario: Monitoring 3.3 V or 5 V supply rails powering ARM Cortex-M or RISC-V microcontrollers during cold start and brownout. IC Role / Device Role / Timing Role: Voltage supervisor providing power-on-reset (POR) and brownout reset signals synchronized to VCC ramp. Use Value: Prevents CPU lockup or memory corruption by ensuring processor remains held in reset until supply stabilizes above 4.00 V ±1%. | Use Scenario: Supervising Li-ion battery discharge paths in handheld medical devices or wireless sensors operating down to 3.0 V. IC Role / Device Role / Timing Role: Low-quiescent-current supervisor asserting reset before battery voltage falls below safe MCU operating range. Use Value: Extends usable battery life by enabling graceful shutdown at precisely 4.00 V, avoiding premature cutoff or unsafe undervoltage operation. |
| Intelligent Instrumentation | Industrial Control Systems |
Use Scenario: Ensuring deterministic startup of digital multimeters or data loggers with precision analog front-ends. IC Role / Device Role / Timing Role: Reference-stable supervisor coordinating ADC reference enablement and µC initialization sequence. Use Value: Eliminates measurement offset errors caused by partial power-up states, leveraging ±1% threshold and hysteresis for noise margin. | Use Scenario: Securing PLC I/O module power sequencing in factory automation where EMI-induced supply dips are common. IC Role / Device Role / Timing Role: Immune-to-transient supervisor generating glitch-free reset pulses despite motor drive switching noise. Use Value: Reduces field failures by rejecting sub-µs VCC glitches per Figure 6 in datasheet, maintaining system integrity without external filtering. |
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 factory-programmed timeout; higher ICC (2.5 µA min, but no µA-typical spec given) | Not suitable for 4.00 V rail monitoring; lacks external timeout adjustability | Select only if 3.3 V threshold and fixed delay meet system requirements and SOT-23-5 footprint is retained. |
| MAX6326UT41D3+ | 4.1 V threshold (±1.5%); 140 ms fixed timeout; higher ICC (2 µA max); different pinout (Reset on Pin 1) | Less accurate threshold; non-adjustable delay; incompatible pin mapping requires PCB redesign | Consider only for cost-sensitive designs accepting looser tolerance and no delay tuning capability. |
Compared with TPS3808G33DBVR and MAX6326UT41D3+, the LP3470IM5-4.00 uniquely delivers 4.00 V ±1% accuracy with user-programmable reset hold time in the same SOT-23-5 package - enabling precise, adaptable supervision without layout changes or firmware overhead.
Availability
LP3470IM5-4.00 is available at Aetrix Electronics and suitable for microprocessor power monitoring, portable battery-powered equipment, intelligent instrumentation, industrial control systems, and embedded computing applications requiring stable component supply and long-term manufacturability.
Supply support for LP3470IM5-4.00 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 LP3470IM5-4.00 belongs to TI's voltage supervisor product line, designed specifically for high-accuracy, low-power power-on-reset and brownout detection in space-constrained, battery-sensitive, and industrial-grade electronic systems.
FAQ
What is the exact reset threshold voltage of the LP3470IM5-4.00?
The LP3470IM5-4.00 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 specified in the Electrical Characteristics table under VRTH and confirmed in the Mechanical, Packaging, and Orderable Information section where "LP3470IM5-4.00/NOPB" is explicitly listed with 4.00 V threshold.
How is the reset timeout period set for the LP3470IM5-4.00?
The reset timeout period (tRP) of the LP3470IM5-4.00 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 1 nF capacitor yields ~2 ms. Leaving SRT floating disables the timeout, causing Reset to deassert immediately after VCC rises above threshold.
Does the LP3470IM5-4.00 require an external pullup resistor on the Reset pin?
Yes, the LP3470IM5-4.00 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 cited as typical - ensuring sufficient rise time while limiting output current to <10 mA.
Can the LP3470IM5-4.00 operate reliably at very low supply voltages?
Yes, the LP3470IM5-4.00 guarantees reset functionality down to VCC = 0.5 V, as stated in both the Features list and Electrical Characteristics table. This allows it to assert a valid reset signal even during deep brownout or battery depletion scenarios where other supervisors may fail.
What package type and dimensions does the LP3470IM5-4.00 use?
The LP3470IM5-4.00 uses a 5-pin SOT-23 (DBV) package with nominal body dimensions of 1.60 mm × 2.90 mm. This is confirmed in the Device Information table and Package Option Addendum, where "SOT-23 (DBV) | 5" is listed for LP3470IM5-4.00/NOPB, and tape-and-reel packaging details align with standard DBV mechanical drawings.
LP3470IM5-4.00 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:
- 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
LP3470IM5-4.00 FAQ
1.How can I place an order for LP3470IM5-4.00 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3470IM5-4.00 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 LP3470IM5-4.00 reliable?
The price and inventory of LP3470IM5-4.00 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3470IM5-4.00 is usually 5 days.
3.What payment methods are accepted for LP3470IM5-4.00?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470IM5-4.00 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3470IM5-4.00?
LP3470IM5-4.00 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3470IM5-4.00 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 LP3470IM5-4.00?
For technical support, including LP3470IM5-4.00 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470IM5-4.00 requirements.
6.How does Aetrix verify that LP3470IM5-4.00 is sourced from the original manufacturer or authorized distributors?
All LP3470IM5-4.00 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 LP3470IM5-4.00 meets industry standards.
7.What is the process for return or replacement of LP3470IM5-4.00?
All LP3470IM5-4.00 units undergo pre-shipment inspection (PSI). If there is an issue with LP3470IM5-4.00, 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 LP3470IM5-4.00 part is unused and in its original packaging.
Return procedure for LP3470IM5-4.00:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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