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Texas Instruments LP3470IM5-3.65
- Part No.:
- LP3470IM5-3.65
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP3470IM5-3.65.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,771
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Product details
Overview
LP3470IM5-3.65 from Texas Instruments is a micropower voltage supervisor IC with a factory-programmed 3.65 V ±1% reset threshold, open-drain active-low reset output, and capacitor-programmable reset time-out (tRP = 2000 × C1). It monitors VCC supply voltage down to 0.5 V, draws only 16 µA typical quiescent current, and operates across –40°C to +85°C - used in microprocessor power-on-reset circuits for embedded control and battery-powered instrumentation.
For engineers reviewing the LP3470IM5-3.65 datasheet, LP3470IM5-3.65 pinout, LP3470IM5-3.65 application, or LP3470IM5-3.65 equivalent, key selection criteria include reset threshold accuracy over temperature, immunity to short VCC transients, programmable delay via external capacitor, low-voltage operation capability, and SOT-23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The LP3470IM5-3.65 implements a precision bandgap-based voltage reference and comparator architecture to detect VCC falling below 3.65 V with ±1% tolerance over –40°C to +85°C. Its internal hysteresis (15–65 mV) prevents chatter during brownout recovery.
Reset assertion is controlled by an external capacitor on the SRT pin, enabling precise tRP tuning from 1 ms to 3.5 ms across temperature. The open-drain Reset output requires an external pullup resistor (0.68–68 kΩ) and remains valid down to VCC = 0.5 V, ensuring reliable supervision during deep undervoltage conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.65 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 full-system power-up. |
| Reset Time-Out Period | 1–3.5 ms programmable via external capacitor (C1) - provides adjustable hold time after VCC recovery. |
| VCC to Reset Delay | 100–300 µs - guarantees fast response to supply collapse while rejecting sub-microsecond noise. |
| Hysteresis Voltage | 15–65 mV - prevents oscillation during slow VCC ramp-up or noisy supply conditions. |
| Output Type | Open-drain, active-low Reset - allows wired-OR configuration and flexible voltage-level translation. |
Pinout & Package
LP3470IM5-3.65 is housed in a 5-pin SOT-23 (DBV) package measuring 1.60 mm × 2.90 mm, RoHS-compliant with green (Pb-free, no Sb/Br) finish and moisture sensitivity level (MSL) 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SRT) | Reset time-out programming input | Connect external capacitor (C1) to GND to set tRP = 2000 × C1 (ms); floating disables delay. |
| 2 (GND) | Ground reference | Primary return path for internal circuitry and reset output sink current. |
| 3 (VCC1) | Internal supply tie | Must be connected directly to VCC (Pin 4); not functional as independent input. |
| 4 (VCC) | Supply voltage and monitor input | Monitored rail; reset asserts when VCC falls below 3.65 V; valid down to 0.5 V. |
| 5 (Reset) | Open-drain reset output | Active-low signal requiring external pullup; sinks ≤10 mA; logic low guaranteed for VCC ≥ 0.5 V. |
Key Features
| Feature | Design Value |
|---|---|
| ±1% reset threshold accuracy | Maintains tight supervision window across industrial temperature range without trimming. |
| Capacitor-programmable reset delay | Enables precise tRP tuning (1–3.5 ms) using standard ceramic capacitors - no external timing IC needed. |
| Immunity to short VCC transients | Rejects negative-going glitches ≤100 ns at –200 mV, reducing false resets in noisy environments. |
| 0.5 V minimum operating voltage | Ensures reset remains asserted through deep brownout, preventing premature processor release. |
| 16 µA typical supply current | Minimizes standby power draw - critical for coin-cell or energy-harvesting applications. |
Applications
| Microprocessor Power-On Reset | Battery-Powered Instrumentation |
|---|---|
|
Use Scenario: Ensuring clean boot sequence for ARM Cortex-M or PIC microcontrollers after cold start or brownout recovery. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset until VCC stabilizes above 3.65 V and holds for programmable tRP. Use Value: Prevents code execution at marginal voltage, eliminating undefined behavior and flash corruption during power ramp. |
Use Scenario: Supervising supply rails in handheld multimeters, gas detectors, or portable data loggers powered by alkaline or Li-ion cells. IC Role / Device Role / Timing Role: Monitoring main VCC rail and triggering system shutdown or low-battery alert before critical undervoltage. Use Value: Extends usable battery life by enabling graceful shutdown at precisely 3.65 V, avoiding abrupt failure. |
| Industrial Control Modules | Intelligent Sensors |
|
Use Scenario: Securing reliable startup of PLC I/O modules or motor drive controllers exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Providing temperature-stable reset assertion with ±1% threshold accuracy from –40°C to +85°C. Use Value: Eliminates field failures caused by reset timing drift in uncontrolled thermal environments. |
Use Scenario: Enabling robust initialization of MEMS accelerometers or environmental sensors in wireless sensor nodes. IC Role / Device Role / Timing Role: Generating a stable, programmable reset pulse synchronized to regulated 3.3 V supply ramp. Use Value: Guarantees sensor firmware loads only after analog front-end biasing is fully settled. |
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 min tRP; 2.5 µA IQ; SOT-23-6 | Higher accuracy (0.5%) but narrower threshold option; longer minimum delay limits fast-recovery use cases. | Select when ultra-low IQ and tighter threshold tolerance outweigh need for 3.65 V match and shorter tRP. |
| MAX6326LT365D3T | 3.65 V threshold; 1.6 µA IQ; push-pull output; SOT-23-5 | No external capacitor required; fixed 140 ms tRP; lacks programmability and open-drain flexibility. | Choose for lowest power and simplified layout where fixed delay suffices and push-pull interface is acceptable. |
Compared with TPS3808G33DBVR and MAX6326LT365D3T, the LP3470IM5-3.65 uniquely balances 3.65 V precision, capacitor-adjustable delay (1–3.5 ms), and 16 µA IQ in a pin-compatible SOT-23-5 footprint - making it optimal for designs requiring both threshold specificity and timing adaptability.
Availability
LP3470IM5-3.65 is available at Aetrix Electronics and suitable for microprocessor power-on-reset, battery-powered instrumentation, and industrial control modules requiring stable component supply and long-term lifecycle support.
Supply support for LP3470IM5-3.65 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 product line delivers micropower voltage supervisors optimized for reliable power-on-reset and brownout detection in space- and energy-constrained systems - targeting portable, industrial, and instrumentation applications.
FAQ
What is the exact reset threshold voltage of the LP3470IM5-3.65?
The LP3470IM5-3.65 has a factory-programmed reset threshold of 3.65 V with ±1% accuracy over the full operating temperature range (–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 for this specific orderable part number.
How do I calculate the reset time-out period for the LP3470IM5-3.65?
The reset time-out period (tRP) for the LP3470IM5-3.65 is calculated using tRP (ms) = 2000 × C1 (µF), where C1 is the capacitor connected between Pin 1 (SRT) and GND. For example, a 100 nF capacitor yields tRP = 200 ms. The datasheet specifies tRP ranges from 1 ms to 3.5 ms across temperature for valid C1 values.
Does the LP3470IM5-3.65 require an external pullup resistor on the Reset pin?
Yes, the LP3470IM5-3.65 features an open-drain Reset output (Pin 5) and requires an external pullup resistor to VCC. The recommended value is 20 kΩ, within the validated range of 0.68 kΩ to 68 kΩ, ensuring proper logic-high level while limiting sink current to ≤10 mA during reset assertion.
Can the LP3470IM5-3.65 operate with supply voltages below 1 V?
Yes, the LP3470IM5-3.65 is fully functional down to VCC = 0.5 V, as confirmed in the Recommended Operating Conditions and Electrical Characteristics tables. Reset remains asserted and valid at this voltage, enabling supervision during deep brownout conditions where many competing supervisors cease operation.
What is the package type and marking code for LP3470IM5-3.65/NOPB?
The LP3470IM5-3.65/NOPB uses a 5-pin SOT-23 (DBV) package with body dimensions of 1.60 mm × 2.90 mm. Its top-side marking code is D37C, as documented in the Package Option Addendum of the official TI datasheet SNVS003G.
LP3470IM5-3.65 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:
- 3.65V
- 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
LP3470IM5-3.65 FAQ
1.How can I place an order for LP3470IM5-3.65 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3470IM5-3.65 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 LP3470IM5-3.65 reliable?
The price and inventory of LP3470IM5-3.65 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3470IM5-3.65 is usually 5 days.
3.What payment methods are accepted for LP3470IM5-3.65?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470IM5-3.65 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3470IM5-3.65?
LP3470IM5-3.65 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3470IM5-3.65 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 LP3470IM5-3.65?
For technical support, including LP3470IM5-3.65 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470IM5-3.65 requirements.
6.How does Aetrix verify that LP3470IM5-3.65 is sourced from the original manufacturer or authorized distributors?
All LP3470IM5-3.65 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 LP3470IM5-3.65 meets industry standards.
7.What is the process for return or replacement of LP3470IM5-3.65?
All LP3470IM5-3.65 units undergo pre-shipment inspection (PSI). If there is an issue with LP3470IM5-3.65, 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 LP3470IM5-3.65 part is unused and in its original packaging.
Return procedure for LP3470IM5-3.65:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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