My Inquiry
My Account
Texas Instruments LP3470M5-3.65/NOPB
- Part No.:
- LP3470M5-3.65/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP3470M5-3.65/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,947
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LP3470M5-3.65/NOPB from Texas Instruments is a micropower voltage supervisor IC designed for power-on-reset (POR) and brownout detection in microprocessor systems. It features a factory-programmed 3.65 V ±1% reset threshold, programmable reset time-out via external capacitor (tRP = 2000 × C1), open-drain active-low reset output, and operation down to VCC = 0.5 V - enabling reliable supervision in battery-powered and low-voltage embedded applications.
For engineers reviewing the LP3470M5-3.65/NOPB datasheet, LP3470M5-3.65/NOPB pinout, LP3470M5-3.65/NOPB application, or LP3470M5-3.65/NOPB equivalent, key selection considerations include its ±1% threshold accuracy over temperature, 16 µA typical quiescent current, immunity to short VCC transients, SOT-23-5 package compatibility, and requirement for an external timing capacitor on SRT pin.
Technical Context
The LP3470M5-3.65/NOPB implements a precision bandgap-based voltage reference with hysteresis (VHYST = 15–65 mV) to prevent chatter during threshold crossing. Its internal comparator continuously monitors VCC against the 3.65 V threshold and asserts Reset low when VCC falls below VRTH − VHYST.
Reset remains asserted for a user-defined delay (tRP) after VCC rises above VRTH, determined solely by an external capacitor on pin SRT (tRP in ms = 2000 × C1 in µF). The open-drain Reset output requires an external pullup resistor (0.68–68 kΩ), and the device operates across −20°C to +85°C with guaranteed functionality down to 0.5 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.65 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 during deep brownout and full-system power-up. |
| Reset Output Type | Open-drain, active-low - allows wired-OR configuration and flexible logic-level translation. |
| VCC to Reset Delay | 100 µs typical (300 µs max) - provides fast fault response while rejecting sub-microsecond noise. |
| Hysteresis Voltage | 15–65 mV - prevents oscillation during slow-rising/falling supply transitions. |
| Reset Time-Out Period | Programmable from ~1 ms to >3.5 ms via external capacitor - eliminates fixed-timing constraints in POR design. |
Pinout & Package
LP3470M5-3.65/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 pick-and-place assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SRT | Reset time-out programming input | Connects to external capacitor (C1) to set tRP = 2000 × C1 (ms); floating disables delay. |
| 2 - GND | Ground reference | System ground return path for internal reference and comparator circuitry. |
| 3 - VCC1 | Internal supply tie | Must be connected directly to VCC (Pin 4); no external connection required beyond that bond. |
| 4 - VCC | Supply voltage & monitor input | Monitored rail input; device functions down to 0.5 V and tolerates transients per Figure 6. |
| 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 | Eliminates need for external trimming or system-level recalibration across industrial temperature range. |
| Programmable reset timeout | Enables exact match to processor reset hold-time requirements using low-cost ceramic capacitors (e.g., 100 nF → 200 ms). |
| 0.5 V valid reset operation | Guarantees clean reset assertion even during severe brownout or backup-battery switchover. |
| Immunity to short VCC transients | Rejects glitches ≤100 ns at −200 mV amplitude (per Figure 6), reducing false resets in noisy power environments. |
| 16 µA typical supply current | Minimizes loading on weak supplies such as coin-cell batteries or energy-harvesting sources. |
Applications
| Microprocessor Power Monitoring | Portable Medical Devices |
|---|---|
|
Use Scenario: Ensuring safe boot sequence in ARM Cortex-M based patient monitors powered by Li-ion batteries. 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 firmware execution under marginal supply conditions, eliminating corrupted memory writes and sensor initialization failures. |
Use Scenario: Supervising dual-rail power (3.3 V logic + 5 V analog) in handheld ultrasound probes. IC Role / Device Role / Timing Role: Independent 3.65 V reset channel for main controller, synchronized with analog subsystem enable timing. Use Value: Guarantees analog front-end powers up only after digital core is fully initialized, avoiding ADC saturation or DAC latch-up. |
| Industrial PLC I/O Modules | Smart Energy Meters |
|
Use Scenario: Brownout protection for DIN-rail mounted I/O modules exposed to 24 VDC supply fluctuations. IC Role / Device Role / Timing Role: Detecting dips below 3.65 V on internal 3.3 V LDO output and holding MCU in reset for ≥100 ms. Use Value: Avoids spurious Modbus CRC errors or relay chatter during transient line sags, improving field reliability. |
Use Scenario: Secure power sequencing in Class 0.5S electricity meters with metrology ASIC and secure bootloader. IC Role / Device Role / Timing Role: Providing tamper-resistant POR signal to metering SoC, with tRP set to exceed flash programming latency. Use Value: Ensures cryptographic keys are never loaded into volatile memory before full voltage stabilization, meeting IEC 62056 security requirements. |
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; 35 µA IQ; requires external R/C for delay; tighter temp drift (±0.5% over −40°C to +125°C) | Better suited for wide-temp automotive or industrial control where 3.3 V rail supervision is primary need | Select if higher accuracy, extended temperature range, or lower production risk outweighs need for 3.65 V threshold. |
| MAX6326UT37D3+T | 3.7 V threshold; 1.6 µA IQ; fixed 200 ms delay; no external capacitor needed; SC70-4 package | Ideal for ultra-low-power IoT sensors where board space and quiescent current dominate design priorities | Choose when minimizing BOM count and standby current is critical, and fixed delay is acceptable. |
Compared with TPS3808G33DBVR and MAX6326UT37D3+T, LP3470M5-3.65/NOPB uniquely delivers 3.65 V threshold accuracy, sub-20 µA quiescent current, and fully programmable reset timing in a standard SOT-23-5 footprint - making it optimal for legacy 3.6 V rail designs requiring field-proven reliability and layout flexibility.
Availability
LP3470M5-3.65/NOPB is available at Aetrix Electronics and suitable for microprocessor power monitoring, portable medical devices, industrial PLC I/O modules, and smart energy meters requiring stable component supply and long-term manufacturability.
Supply support for LP3470M5-3.65/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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of experience in high-reliability power management ICs.
The LP3470 series was developed specifically for cost-sensitive, space-constrained embedded systems requiring precise, low-power voltage supervision - targeting applications in computing, instrumentation, and portable electronics.
FAQ
What is the reset threshold voltage of the LP3470M5-3.65/NOPB?
The LP3470M5-3.65/NOPB has a factory-programmed reset threshold of 3.65 V with ±1% accuracy over the operating temperature range of −20°C to +85°C. This value is laser-trimmed during production and does not require external calibration. The hysteresis is 15–65 mV, ensuring stable transition behavior during supply ramp-up and brownout recovery.
How do I configure the reset time-out period for LP3470M5-3.65/NOPB?
To configure the reset time-out period (tRP) for LP3470M5-3.65/NOPB, connect a ceramic capacitor (rated ≥10 V) between pin SRT (Pin 1) and GND. Use the formula 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 3.65 V.
Does LP3470M5-3.65/NOPB support operation below 1 V?
Yes, LP3470M5-3.65/NOPB guarantees functional reset assertion down to VCC = 0.5 V, making it suitable for backup power domains and ultra-low-voltage brownout detection. The Reset output remains valid and drives low even at 0.5 V supply, provided the external pullup resistor is referenced to a compatible rail.
What package type and dimensions does LP3470M5-3.65/NOPB use?
LP3470M5-3.65/NOPB uses the industry-standard 5-pin SOT-23 (DBV) package with nominal body dimensions of 1.60 mm × 2.90 mm and a maximum height of 1.45 mm. It is RoHS-compliant, lead-free (NOPB suffix), and qualified for reflow soldering per JEDEC Level-1 moisture sensitivity standards.
Can LP3470M5-3.65/NOPB replace other LP3470 variants with different thresholds?
No - LP3470M5-3.65/NOPB is functionally identical to other LP3470 variants except for its fixed 3.65 V reset threshold. Substituting it for a 2.93 V or 4.38 V variant will cause incorrect reset timing unless the system's supply rail matches 3.65 V within tolerance. Pinout and timing behavior are otherwise identical across the LP3470 family.
LP3470M5-3.65/NOPB 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:
- -20°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LP3470M5-3.65/NOPB FAQ
1.How can I place an order for LP3470M5-3.65/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3470M5-3.65/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 LP3470M5-3.65/NOPB reliable?
The price and inventory of LP3470M5-3.65/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3470M5-3.65/NOPB is usually 5 days.
3.What payment methods are accepted for LP3470M5-3.65/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470M5-3.65/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3470M5-3.65/NOPB?
LP3470M5-3.65/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3470M5-3.65/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 LP3470M5-3.65/NOPB?
For technical support, including LP3470M5-3.65/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470M5-3.65/NOPB requirements.
6.How does Aetrix verify that LP3470M5-3.65/NOPB is sourced from the original manufacturer or authorized distributors?
All LP3470M5-3.65/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 LP3470M5-3.65/NOPB meets industry standards.
7.What is the process for return or replacement of LP3470M5-3.65/NOPB?
All LP3470M5-3.65/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LP3470M5-3.65/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 LP3470M5-3.65/NOPB part is unused and in its original packaging.
Return procedure for LP3470M5-3.65/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP3470M5-3.65/NOPB Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
