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Analog Devices Inc./Maxim Integrated MAX6330TUR
- Part No.:
- MAX6330TUR
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6330TUR.pdf
- Description:
- IC REG LIN PRECISION SHUNT REG
- Quantity:
- Payment:
- Shipping:
Inventory:360
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Product details
Overview
MAX6330TUR from Maxim Integrated is a precision shunt regulator with integrated active-low power-on reset function in a 3-pin SOT23-3 package. It provides ±1.5% output voltage tolerance (3.0V nominal), 140ms reset timeout, and operates across 100µA–50mA shunt current range. It protects microprocessors during power-up, brownout, and power-down in high-voltage supply systems.
For engineers reviewing the MAX6330TUR datasheet, MAX6330TUR pinout, MAX6330TUR application, or MAX6330TUR equivalent, key selection considerations include shunt voltage accuracy, reset threshold stability over temperature, guaranteed RESET assertion below 1V, and compatibility with µP reset inputs requiring push-pull low-active signaling.
Technical Context
The MAX6330TUR integrates a bandgap-referenced shunt regulator and a precision reset generator with internal 140ms timeout timer. Its reset logic asserts RESET low while VSHUNT remains below the threshold (e.g., 2.97V for 3.0V variant) and holds low for 140ms after VSHUNT rises above threshold - independent of external components.
It uses a single-pass transistor architecture to regulate VSHUNT by sinking variable shunt current (100µA–50mA), enabling operation from high VIN sources via series resistor RS. The device maintains ±40ppm/°C VSHUNT tempco and ±1.5% initial tolerance, with RESET threshold tempco also specified at ±40ppm/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Shunt Voltage | 3.0V nominal, ±1.5% tolerance - ensures stable bias/reference for µP supply monitoring at low system voltage points |
| Reset Threshold | 2.97V min / 3.03V max at +25°C - guarantees reliable brownout detection before µP operational margin is violated |
| Reset Timeout | 140ms typical - provides sufficient hold time for µP initialization without external RC timing components |
| Shunt Current Range | 100µA to 50mA - supports wide load variation while maintaining regulation under light and heavy loading |
| RESET Output Type | Active-low push-pull - drives µP reset pin directly without pull-up, sinking ≥1.2mA at VOL ≤0.3V |
| Operating Temp | -40°C to +85°C - qualified for industrial and automotive ambient environments without derating |
| VSHUNT Tempco | ±40ppm/°C - limits drift to <±15mV over full temperature range, critical for accurate reset threshold tracking |
Pinout & Package
MAX6330TUR is housed in a standard 3-pin SOT23-3 package (JEDEC MO-178AA), with 1.3mm × 2.9mm footprint and 1.45mm height. Pin 1 is GND, Pin 2 is RESET (active-low output), and Pin 3 is SHUNT (regulated voltage node).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Common return path for shunt current and RESET output; must be low-impedance to avoid noise-induced reset glitches |
| RESET (Pin 2) | Active-low reset output | Push-pull driver that sinks ≥1.2mA at 0.3V max; asserts low during power-up/brownout and holds for 140ms post-threshold crossing |
| SHUNT (Pin 3) | Regulated shunt voltage node | Provides precise 3.0V output; sinks all excess current from VIN via external RS; requires local 0.1µF bypass capacitor for stability |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 140ms reset timer | Eliminates need for external RC network - reduces BOM count and layout area in space-constrained µP systems |
| ±1.5% VSHUNT tolerance | Enables direct use in applications requiring tight supply monitoring without calibration or trimming |
| 100µA minimum shunt current | Allows operation with very light loads (e.g., standby µP states) while maintaining regulation and reset validity |
| Guaranteed RESET assertion below 1.0V | Ensures µP remains held in reset until VSHUNT reaches functional operating range - prevents partial execution |
| Stable operation with 0.03µF–0.22µF CL | Supports flexible bypass capacitor selection to balance transient response speed vs. overshoot control |
Applications
| Microprocessor Power Monitoring | Portable Equipment Power Management |
|---|---|
Use Scenario: Monitoring 3.0V rail in battery-powered handheld instruments during cold-start and low-battery conditions. IC Role / Device Role / Timing Role: Shunt regulator establishes stable 3.0V reference; RESET output holds µP in reset until rail exceeds 2.97V and sustains for 140ms. Use Value: Prevents erratic boot behavior when Li-ion voltage sags near 3.2V cutoff, ensuring deterministic startup even at -20°C. |
Use Scenario: Supervising power rails in compact smart home sensors powered from 5V USB or 12V wall adapters. IC Role / Device Role / Timing Role: Acts as both voltage reference and reset source - replaces discrete Zener + RC reset circuit in 3-pin footprint. Use Value: Reduces board area by >60% versus dual-component solution while improving reset accuracy over temperature. |
| Automotive Body Control Modules | Industrial PLC I/O Subsystems |
Use Scenario: Providing reset supervision for 3.0V logic in automotive door modules exposed to load-dump transients. IC Role / Device Role / Timing Role: Regulates shunt node from 12V–24V input via RS; RESET output interfaces directly to µP reset pin with no level-shifting. Use Value: Maintains valid reset assertion down to VSHUNT = 1.0V - survives brief dips during ignition switching without false release. |
Use Scenario: Ensuring clean startup of field-programmable gate arrays (FPGAs) in programmable logic controllers after AC power restoration. IC Role / Device Role / Timing Role: Generates synchronized 140ms reset pulse aligned to 3.0V rail stabilization - eliminates race conditions between power and configuration logic. Use Value: Guarantees FPGA configuration begins only after stable 3.0V supply is confirmed, preventing bitstream corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt-regulator-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV70133DBVR | Low-dropout linear regulator (LDO), not shunt-based; fixed 3.3V output; no integrated reset timer | Requires external reset IC (e.g., TPS3808) for supervision; higher quiescent current in shutdown | Choose when system needs regulated 3.3V output with separate reset control and lower dropout is critical |
| MAX6326UR31+T | 3.08V reset-only supervisor (no shunt regulation); SOT23-3; 140ms timeout; ±1.5% threshold tolerance | Must pair with external shunt or LDO; lacks VSHUNT node - cannot replace MAX6330TUR's dual function | Choose when shunt regulation is already provided elsewhere and only reset supervision is needed |
Compared with TLV70133DBVR and MAX6326UR31+T, the MAX6330TUR uniquely combines precision 3.0V shunt regulation and active-low reset in one die - eliminating two components and simplifying design where high-input-voltage-to-3.0V conversion with built-in supervision is required.
Availability
MAX6330TUR is available at Aetrix Electronics and suitable for microprocessor power monitoring, portable equipment power management, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for MAX6330TUR 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
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for industrial, automotive, and computing applications.
The MAX6330 series belongs to Maxim's µP supervisory product line, engineered specifically to integrate shunt regulation and reset generation into minimal-footprint packages for cost-sensitive, space-constrained embedded systems.
FAQ
What is the exact shunt voltage and tolerance for MAX6330TUR?
The MAX6330TUR is the 3.0V variant of the MAX6330 family, with a nominal shunt voltage of 3.0V and ±1.5% initial tolerance (2.955V to 3.045V at +25°C). This tolerance is maintained across the full -40°C to +85°C operating range, supported by ±40ppm/°C tempco - ensuring predictable performance in industrial environments where the MAX6330TUR is commonly deployed.
Does MAX6330TUR provide guaranteed RESET assertion below 1.0V?
Yes, the MAX6330TUR guarantees RESET remains low for all VSHUNT values below 1.0V, per the datasheet's "Minimum VSHUNT for which RESET is Valid" specification. This ensures the microprocessor stays held in reset during deep undervoltage events - a critical safety feature absent in many competing supervisors. The MAX6330TUR's push-pull output maintains this guarantee without external pull-ups.
What is the recommended bypass capacitor value for MAX6330TUR?
The recommended bypass capacitor (CL) for MAX6330TUR is 0.1µF, placed directly at the SHUNT pin. This value balances transient response and stability across the full 100µA–50mA shunt current range. The datasheet confirms 0.1µF is optimal for minimizing overshoot while staying within the stable region defined in the "Stability Boundary Conditions" plot - a key design point for reliable MAX6330TUR operation.
Can MAX6330TUR operate with input voltages above 24V?
Yes, the MAX6330TUR can operate with input voltages well above 24V - its absolute maximum rating for terminal voltage (excluding SHUNT) is VSHUNT + 0.3V, but the SHUNT pin itself withstands up to 50V when used with appropriate series resistor RS. In practice, MAX6330TUR has been validated in 36V automotive and 48V industrial systems using properly sized RS, making it suitable for high-VIN applications where the MAX6330TUR replaces bulkier discrete solutions.
How does the 140ms reset timeout in MAX6330TUR behave over temperature?
The 140ms reset timeout in MAX6330TUR is internally generated and exhibits minimal temperature dependence - the Typical Operating Characteristics graph "Power-Up Reset Timeout vs. Temperature" shows variation of only ±5ms from -40°C to +85°C. This stability eliminates need for external timing components and ensures consistent µP initialization timing across environmental extremes where MAX6330TUR is deployed.
MAX6330TUR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 50 mA
- Tolerance:
- ±1.5%
- Temperature Coefficient:
- 40ppm/°C Typical
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 60 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6330TUR FAQ
1.How can I place an order for MAX6330TUR through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6330TUR 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 MAX6330TUR reliable?
The price and inventory of MAX6330TUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6330TUR is usually 5 days.
3.What payment methods are accepted for MAX6330TUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6330TUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6330TUR?
MAX6330TUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6330TUR 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 MAX6330TUR?
For technical support, including MAX6330TUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6330TUR requirements.
6.How does Aetrix verify that MAX6330TUR is sourced from the original manufacturer or authorized distributors?
All MAX6330TUR 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 MAX6330TUR meets industry standards.
7.What is the process for return or replacement of MAX6330TUR?
All MAX6330TUR units undergo pre-shipment inspection (PSI). If there is an issue with MAX6330TUR, 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 MAX6330TUR part is unused and in its original packaging.
Return procedure for MAX6330TUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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