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Analog Devices Inc./Maxim Integrated MAX6471TA30AD3+
- Part No.:
- MAX6471TA30AD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6471TA30AD3+.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,417
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Product details
Overview
MAX6471TA30AD3+ from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 3.0V output, -12.5% reset threshold, and 150ms minimum reset timeout. It features 82µA quiescent current, 114mV dropout at full load, and active-low manual reset (MR) input. Designed for battery-powered portable systems requiring reliable power sequencing and brownout protection.
For engineers reviewing the MAX6471TA30AD3+ datasheet, MAX6471TA30AD3+ pinout, MAX6471TA30AD3+ application, or MAX6471TA30AD3+ equivalent, key selection criteria include its 3.0V fixed output, MR-enabled reset assertion during in-spec operation, 150ms reset timeout, SOT23-6 package compatibility, and shutdown current of 0.1µA - all critical for space-constrained, low-power embedded designs.
Technical Context
The MAX6471TA30AD3+ integrates an LDO regulator core with ±2.0% output voltage accuracy over -40°C to +85°C and a dedicated reset supervisor using the same internal reference. Its MR pin enables external reset initiation while VOUT remains within tolerance, with internal 40kΩ pullup to VOUT and 1µs minimum pulse width support.
This variant belongs to the MAX6471–MAX6474 subfamily, confirmed by its TA suffix (TDFN-EP package), 30 output code (3.0V), A reset threshold (-12.5%), and D3 timeout (150ms min). It lacks shutdown (SHDN) but includes MR and SET pins - distinguishing it from MAX6469/MAX6470 (SHDN-only) and MAX6473/MAX6474 (SHDN+MR dual variants).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V ±2.0% over temperature - ensures stable supply for 3.3V-tolerant logic without external feedback components. |
| Max Output Current | 300mA guaranteed - sufficient to power microcontrollers, sensors, and RF transceivers in portable devices. |
| Dropout Voltage | 114mV at 300mA - enables regulation from 3.114V input, supporting single-cell Li-ion or triple-alkaline operation. |
| Quiescent Current | 82µA typical - minimizes battery drain during active operation, extending runtime in always-on applications. |
| Reset Timeout | 150ms minimum - provides adequate stabilization time for processors and clock oscillators before release. |
| Reset Threshold | -12.5% of VOUT (2.625V) - triggers reset earlier than -7.5% variants, improving robustness against marginal supply conditions. |
| MR Input Logic | Active-low with 40kΩ internal pullup to VOUT - eliminates external biasing; compatible with pushbutton or open-drain logic control. |
Pinout & Package
MAX6471TA30AD3+ is housed in an 8-pin TDFN-EP (3mm × 3mm) package with exposed paddle. The EP pad must be soldered to PCB ground for thermal and electrical integrity. Pin functions are validated per Maxim's official pin description for MAX6471/MAX6472 in TDFN-EP.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator input | Accepts 2.5V–5.5V input; requires 0.1µF bypass to GND for stability. |
| 2 (GND) | Ground / thermal sink | Primary return path and thermal conduction path; must connect to large copper area. |
| 3 (MR) | Manual reset input | Active-low signal; internally pulled up to VOUT (40kΩ typ); asserts RESET when low. |
| 4 (RESET) | Active-low reset output | Push-pull configuration; holds low during MR assertion, VOUT undervoltage, or until 150ms timeout expires. |
| 5 (SET) | Feedback reference input | Connect to GND for fixed 3.0V output; supports adjustable mode via external resistor divider. |
| 6 (OUT) | Regulated output | Delivers 3.0V/300mA; requires ≥3.3µF low-ESR capacitor to GND for transient response. |
| 7–8 (EP) | Exposed paddle | Internally connected to GND; mandatory solder connection to PCB ground plane for thermal dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MR-enabled reset supervisor | Allows system-level reset initiation without external logic, reducing BOM count and board area. |
| 150ms reset timeout with -12.5% threshold | Ensures processor clocks and peripherals stabilize before boot, preventing erratic startup behavior. |
| 82µA quiescent current | Extends battery life in standby or low-duty-cycle monitoring applications (e.g., IoT sensors). |
| Reverse current protection (0.01µA OUT→IN) | Prevents backfeeding into primary battery when backup source is present, enabling safe battery-swapping. |
| Thermal shutdown with 20°C hysteresis | Provides fault-safe operation under overload or poor heatsinking; auto-recovers after cooling. |
Applications
| Handheld Instruments | Bluetooth Modules |
|---|---|
|
Use Scenario: Power management in handheld test meters with real-time display and wireless upload. IC Role / Device Role / Timing Role: Primary 3.0V supply regulator with MR-triggered firmware reset on button press. Use Value: Eliminates need for discrete supervisor IC and reduces footprint by integrating reset timing and manual trigger. |
Use Scenario: Voltage regulation for Bluetooth SoC and associated RF front-end in wearables. IC Role / Device Role / Timing Role: Stable 3.0V rail generator with brownout detection and 150ms reset hold to prevent radio initialization failure. Use Value: Guarantees clean power-up sequence for Bluetooth stack, avoiding pairing instability due to premature wake-up. |
| Notebook Subsystems | Digital Cameras |
|
Use Scenario: Dedicated power rail for embedded controller (EC) or keyboard controller in ultrabooks. IC Role / Device Role / Timing Role: Regulator with MR input tied to EC reset line for coordinated system recovery. Use Value: Enables synchronized reset between host CPU and peripheral controllers without additional timing logic. |
Use Scenario: Powering image sensor interface and flash memory controller during burst capture. IC Role / Device Role / Timing Role: Low-noise 3.0V supply with fast MR response to abort write operations during low-battery warning. Use Value: Prevents file corruption by asserting reset before voltage collapse, preserving image data integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6471TA30AD2+ | Same 3.0V output and MR function, but 20ms reset timeout instead of 150ms. | Suitable for faster-boot systems where shorter reset hold is acceptable (e.g., simple MCU-based peripherals). | Select when faster system recovery is prioritized over conservative oscillator stabilization time. |
| MAX6472TA30AD3+ | Identical specs except -7.5% reset threshold (2.775V) vs. -12.5% (2.625V); same 150ms timeout. | Better suited for systems with tighter supply tolerance or higher noise immunity requirements. | Choose when supply ripple or transient margin demands earlier reset assertion than -12.5% allows. |
Compared with MAX6471TA30AD2+, the MAX6471TA30AD3+ extends reset hold time for robust clock stabilization; compared with MAX6472TA30AD3+, it lowers reset threshold to tolerate greater supply sag - making it optimal for cost-sensitive, battery-voltage-sensitive portable designs.
Availability
MAX6471TA30AD3+ is available at Aetrix Electronics and suitable for handheld instruments, Bluetooth modules, notebook subsystems, and digital cameras requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX6471TA30AD3+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management solutions for industrial, communications, and consumer applications.
The MAX6469–MAX6484 product line was designed specifically for battery-powered portable electronics needing integrated power regulation and intelligent reset supervision in minimal footprint packages.
FAQ
What is the output voltage tolerance of the MAX6471TA30AD3+ over temperature?
The MAX6471TA30AD3+ guarantees ±2.0% output voltage accuracy across the full operating range of -40°C to +85°C. This specification applies to fixed-output operation with the SET pin grounded, and is confirmed in the Electrical Characteristics table under "Output Voltage Accuracy (Fixed Output Voltage Operation)" for the MAX6471–MAX6474 family. At +25°C, typical accuracy tightens to ±1.1%.
Does the MAX6471TA30AD3+ support shutdown functionality?
No, the MAX6471TA30AD3+ does not include a shutdown (SHDN) input. It belongs to the MAX6471–MAX6474 subfamily, which replaces SHDN with a manual reset (MR) input. Shutdown capability is present only in MAX6469/MAX6470/MAX6473–MAX6478/MAX6481–MAX6484 variants. The MAX6471TA30AD3+ relies on MR for reset control and draws 82µA continuously in active mode.
What is the purpose of the SET pin on the MAX6471TA30AD3+?
The SET pin on the MAX6471TA30AD3+ serves as the feedback reference input. When grounded, it selects the factory-preset 3.0V output. When connected to an external resistor divider between OUT and GND, it enables adjustable output voltages from 1.25V to 5.5V using the equation VOUT = 1.229V × (1 + R1/R2). This dual-mode flexibility allows one footprint to support both fixed and programmable designs.
How does the MR pin behave when left unconnected on the MAX6471TA30AD3+?
When left unconnected, the MR pin on the MAX6471TA30AD3+ is internally pulled up to VOUT via a 40kΩ (typ) resistor. This ensures the MR input remains at a logic-high level, preventing unintended reset assertion. No external pullup is required. If manual reset is needed, a switch or logic signal can pull MR to GND; no debouncing circuitry is necessary due to built-in 120ns glitch rejection.
What package type is used for the MAX6471TA30AD3+ and what are its thermal requirements?
The MAX6471TA30AD3+ uses an 8-pin TDFN-EP (3mm × 3mm) package with exposed paddle. The EP pad must be soldered to a PCB ground plane to achieve specified thermal performance: continuous power dissipation is rated at 1951mW at +70°C, derating 24.4mW/°C above that. Failure to connect EP compromises thermal reliability and may trigger premature thermal shutdown under sustained 300mA load.
MAX6471TA30AD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.2V (3V)
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- 0.19V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 136 µA
- Current - Supply (Max):
- 96 µA
- PSRR:
- -
- Control Features:
- Reset, Shutdown
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN-EP (3x3)
MAX6471TA30AD3+ FAQ
1.How can I place an order for MAX6471TA30AD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6471TA30AD3+ 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 MAX6471TA30AD3+ reliable?
The price and inventory of MAX6471TA30AD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6471TA30AD3+ is usually 5 days.
3.What payment methods are accepted for MAX6471TA30AD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6471TA30AD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6471TA30AD3+?
MAX6471TA30AD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6471TA30AD3+ 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 MAX6471TA30AD3+?
For technical support, including MAX6471TA30AD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6471TA30AD3+ requirements.
6.How does Aetrix verify that MAX6471TA30AD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6471TA30AD3+ 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 MAX6471TA30AD3+ meets industry standards.
7.What is the process for return or replacement of MAX6471TA30AD3+?
All MAX6471TA30AD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6471TA30AD3+, 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 MAX6471TA30AD3+ part is unused and in its original packaging.
Return procedure for MAX6471TA30AD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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