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Texas Instruments LP3470IM5-4.63
- Part No.:
- LP3470IM5-4.63
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LP3470IM5-4.63.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,386
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Product details
Overview
LP3470IM5-4.63 from Texas Instruments is a micropower voltage supervisor IC with factory-programmed 4.63 V ±1% reset threshold, open-drain active-low reset output, and programmable reset time-out period via external capacitor. It monitors VCC supply voltage down to 0.5 V and asserts reset during brownout or power-up sequencing in microprocessor-based systems.
For engineers reviewing the LP3470IM5-4.63 datasheet, LP3470IM5-4.63 pinout, LP3470IM5-4.63 application, or LP3470IM5-4.63 equivalent, this page delivers verified electrical specifications, SOT-23-5 pin mapping, real-world timing behavior (tRP = 2000 × C1), thermal metrics (RθJA = 171 °C/W), and validated alternative parts for power-on-reset design validation.
Technical Context
The LP3470IM5-4.63 implements a precision bandgap reference with hysteresis (VHYST = 15–65 mV) and comparator-based reset assertion logic. Its internal delay timer is capacitor-programmable (tRP range: 1–3.5 ms over temperature), and it features immunity to short VCC transients due to built-in glitch rejection circuitry.
It operates across –40°C to +85°C with 16 µA typical quiescent current and guarantees reset validity at VCC as low as 0.5 V. The device uses a CMOS process and requires no external components beyond pullup resistor (0.68–68 kΩ) and optional SRT capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63 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. |
| Reset Output Type | Open-drain, active-low - supports wired-OR reset buses and flexible voltage-level interfacing. |
| Minimum Operating VCC | 0.5 V - guarantees reliable reset assertion during deep brownout or ultra-low-power wake-up. |
| Reset Time-Out Period | Programmable via external capacitor (tRP = 2000 × C1, C1 in µF, tRP in ms) - provides precise POR timing control. |
| Hysteresis Voltage | 15–65 mV - prevents chatter during slow-rising/falling VCC transitions near threshold. |
| Junction-to-Ambient Thermal Resistance | 171 °C/W (SOT-23-5) - defines maximum allowable power dissipation under natural convection. |
Pinout & Package
LP3470IM5-4.63 is housed in a 5-pin SOT-23 (DBV) package measuring 1.60 mm × 2.90 mm, 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 | Connects to external capacitor (C1) to set tRP; floating disables delay; ceramic ≥10 V rating recommended. |
| 2 - GND | Ground reference | Primary return path for internal reference and comparator; must be low-impedance connection. |
| 3 - VCC1 | Internal supply tie | Must be connected directly to VCC (Pin 4); not an independent input - internal node for biasing. |
| 4 - VCC | Supply voltage and monitor input | Monitored rail; powers internal circuitry; valid operation from 0.5 V to 5.5 V. |
| 5 - Reset | Open-drain reset output | Active-low signal; requires external pullup (0.68–68 kΩ) to VCC or another logic rail. |
Key Features
| Feature | Design Value |
|---|---|
| ±1% reset threshold accuracy | Maintains tight voltage margin across full temperature range, eliminating need for system-level trimming. |
| Programmable reset timeout | Enables precise POR duration tuning (e.g., 200 ms with 100 nF) without changing IC or firmware. |
| Immunity to short VCC transients | Rejects sub-microsecond negative glitches up to specified amplitude, reducing false resets in noisy environments. |
| Low-voltage reset validity | Asserts clean reset signal even when VCC drops to 0.5 V - critical for ultra-low-power wake-up integrity. |
| Open-drain output architecture | Allows shared reset bus across multiple devices and compatibility with mixed-voltage logic domains. |
Applications
| Microprocessor Power-On Reset | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Ensures microcontroller remains held in reset until regulated 3.3 V or 5 V rail stabilizes after power application. IC Role / Device Role / Timing Role: Voltage supervisor providing factory-trimmed 4.63 V threshold and user-adjustable tRP to match processor's minimum reset hold time. Use Value: Prevents illegal opcode execution during unstable power ramp; eliminates need for discrete RC timing networks. |
Use Scenario: Monitors main Li-ion battery voltage in handheld test equipment to initiate graceful shutdown before cutoff. IC Role / Device Role / Timing Role: Brownout detector with 4.63 V threshold and hysteresis, asserting reset before battery sag triggers uncontrolled reset or data corruption. Use Value: Extends usable battery capacity by enabling controlled shutdown at precisely defined voltage, avoiding premature termination. |
| Industrial Control Module | Embedded Communication Gateway |
Use Scenario: Supervises 5 V auxiliary supply feeding FPGA configuration logic and I/O buffers in PLC backplane modules. IC Role / Device Role / Timing Role: System-level reset generator ensuring FPGA config memory loads only after stable VCC, using programmable tRP to accommodate slow-ramping supplies. Use Value: Eliminates configuration failures caused by marginal supply rise times; supports robust field deployment in temperature-variable environments. |
Use Scenario: Provides synchronized reset to ARM Cortex-M host and companion Ethernet/USB PHY chips during cold start of IoT gateway. IC Role / Device Role / Timing Role: Single-point reset source with open-drain output enabling wired-OR reset distribution across heterogeneous voltage domains (3.3 V, 2.5 V, 1.8 V). Use Value: Guarantees deterministic boot sequence across subsystems without requiring multiple supervisors or custom logic. |
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 factory-programmed tRP; higher ICC (2.5 µA min) | Lacks adjustable tRP and 4.63 V threshold; suited for 3.3 V systems only | Select if fixed timing and lower quiescent current are prioritized over threshold flexibility. |
| MAX6326LT463D2T | 4.63 V threshold; push-pull output; no external capacitor option; 1.6 µA ICC | Requires no external capacitor but lacks programmable delay; incompatible with wired-OR reset buses | Choose when board space is constrained and open-drain functionality is unnecessary. |
Compared with LP3470IM5-4.63, TPS3808G33DBVR offers tighter ICC specs but sacrifices threshold and tRP flexibility, while MAX6326LT463D2T trades programmability for ultra-low current and push-pull drive - making LP3470IM5-4.63 optimal for designs requiring both precise 4.63 V detection and field-tunable reset timing.
Availability
LP3470IM5-4.63 is available at Aetrix Electronics and suitable for microprocessor power-on-reset, battery-powered instrumentation, industrial control modules, and embedded communication gateways requiring stable component supply and long-term lifecycle support.
Supply support for LP3470IM5-4.63 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 leadership in power management, signal chain, and high-reliability ICs.
The LP3470 series was designed for cost-sensitive, space-constrained microprocessor supervisory applications demanding precision threshold accuracy, ultra-low power, and flexible reset timing - targeting industrial, portable, and computing end-equipment.
FAQ
What is the exact reset threshold voltage of LP3470IM5-4.63?
The LP3470IM5-4.63 has a factory-programmed reset threshold of 4.63 V with ±1% accuracy over the full operating temperature range (–40°C to +85°C). This value is trimmed during production and guaranteed per Electrical Characteristics table in the SNVS003G datasheet. The hysteresis (VHYST) adds 15–65 mV to prevent oscillation near the threshold.
Can LP3470IM5-4.63 operate with supply voltages below 1 V?
Yes, LP3470IM5-4.63 guarantees reset assertion and functional operation down to VCC = 0.5 V. Its internal reference and comparator remain active at this level, enabling reliable brownout detection in ultra-low-power wake-up scenarios where other supervisors fail. Operation above 0.5 V is required for valid reset output behavior.
How do I calculate the reset time-out period for LP3470IM5-4.63?
The reset time-out period (tRP) is calculated using tRP (ms) = 2000 × C1 (µF), where C1 is the capacitor connected between SRT (Pin 1) and GND. For example, a 100 nF (0.1 µF) capacitor yields tRP = 200 ms. The datasheet specifies tRP ranges from 1 ms to 3.5 ms over temperature for C1 = 1 nF.
What pullup resistor value should I use on the Reset pin of LP3470IM5-4.63?
A pullup resistor between 0.68 kΩ and 68 kΩ is required on the Reset (Pin 5) output. A typical value is 20 kΩ. Lower values ensure faster rise time but increase current draw; higher values reduce current but may slow edge rates. The resistor must be connected to the same rail as the receiving logic to maintain voltage compatibility.
Is LP3470IM5-4.63 pin-compatible with other LP3470 variants?
Yes, all LP3470 variants - including LP3470IM5-2.63/NOPB, LP3470IM5-4.38/NOPB, and LP3470IM5-4.63/NOPB - share identical SOT-23-5 (DBV) packaging and pinout. Only the factory-programmed reset threshold differs; no PCB layout changes are needed when substituting between variants for design optimization or supply chain flexibility.
LP3470IM5-4.63 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:
- 4.63V
- 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
LP3470IM5-4.63 FAQ
1.How can I place an order for LP3470IM5-4.63 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP3470IM5-4.63 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 LP3470IM5-4.63 reliable?
The price and inventory of LP3470IM5-4.63 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP3470IM5-4.63 is usually 5 days.
3.What payment methods are accepted for LP3470IM5-4.63?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP3470IM5-4.63 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP3470IM5-4.63?
LP3470IM5-4.63 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP3470IM5-4.63 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 LP3470IM5-4.63?
For technical support, including LP3470IM5-4.63 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP3470IM5-4.63 requirements.
6.How does Aetrix verify that LP3470IM5-4.63 is sourced from the original manufacturer or authorized distributors?
All LP3470IM5-4.63 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 LP3470IM5-4.63 meets industry standards.
7.What is the process for return or replacement of LP3470IM5-4.63?
All LP3470IM5-4.63 units undergo pre-shipment inspection (PSI). If there is an issue with LP3470IM5-4.63, 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 LP3470IM5-4.63 part is unused and in its original packaging.
Return procedure for LP3470IM5-4.63:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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