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Analog Devices Inc./Maxim Integrated MAX6471TA15AD3+
- Part No.:
- MAX6471TA15AD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6471TA15AD3+.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,472
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Product details
Overview
The MAX6471TA15AD3+ from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, preset +1.5V output, -7.5% reset threshold, and 150ms (min) active-low open-drain RESET timeout. It features 82µA quiescent current, 55mV dropout at 150mA, and operates from 2.5V to 5.5V input - ideal for battery-powered handheld instruments and USB peripherals requiring stable low-power supply and reliable power-on reset.
For engineers reviewing the MAX6471TA15AD3+ datasheet, MAX6471TA15AD3+ pinout, MAX6471TA15AD3+ application, or MAX6471TA15AD3+ equivalent, key selection considerations include its manual reset input (MR), 150ms reset timeout, SOT23-6 package compatibility, and integration of LDO regulation with supervisor functionality in a single die.
Technical Context
The MAX6471TA15AD3+ implements a dual-function analog core: an LDO regulator with internal 1.229V SET reference and ±2.0% output voltage accuracy over –40°C to +85°C, plus a dedicated reset supervisor that shares the same bandgap reference. Its MR pin enables external assertion of RESET while VOUT remains within specification, with 200ns MR-to-RESET delay and 120ns glitch rejection.
This device belongs to the MAX6471–MAX6474/MAX6479–MAX6482 variant group featuring manual reset capability and no shutdown control. It uses open-drain RESET with 0.4V VOL at 3.2mA sink, and includes thermal shutdown at +180°C with 20°C hysteresis, reverse OUT-to-IN leakage protection (<0.01µA), and 450mA current limit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +1.5V fixed (preset, no external resistor required) |
| Max Output Current | 300mA guaranteed continuous load delivery |
| Dropout Voltage | 55mV at 150mA load - enables operation with minimal VIN–VOUT headroom |
| Quiescent Current | 82µA typical - extends battery life in always-on portable systems |
| Reset Threshold | -7.5% of nominal VOUT (i.e., asserts below +1.3875V) - meets standard µP supply tolerance |
| Reset Timeout | 150ms minimum - ensures sufficient stabilization time before processor release |
| Input Voltage Range | 2.5V to 5.5V - compatible with single Li-ion, 3-cell alkaline, or USB 5V rails |
| Operating Temp | -40°C to +85°C - qualified for industrial and consumer portable environments |
Pinout & Package
MAX6471TA15AD3+ is housed in a 6-pin SOT23-6 package with exposed pad not electrically connected; GND pin serves as thermal path and must be soldered to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator input | Bypass with 0.1µF capacitor to GND; accepts 2.5V–5.5V input |
| 2 GND | Ground / thermal pad | Primary return path and heatsink - requires large copper area for thermal management |
| 3 MR | Active-low manual reset input | Pulled up internally to VOUT (40kΩ typ); logic-low assertion triggers RESET regardless of VOUT status |
| 4 RESET | Active-low open-drain reset output | Sinks 3.2mA max; requires external pullup; asserts during power-up, brownout, or MR activation |
| 5 SET | Feedback reference input | Connected to GND for +1.5V fixed output; supports adjustable mode via external divider |
| 6 OUT | Regulated output | Delivers +1.5V @ ≤300mA; bypass with ≥3.3µF low-ESR capacitor to GND |
Key Features
| Feature | Design Value |
|---|---|
| Integrated manual reset input (MR) | Enables system-level reset initiation without disrupting regulated output - critical for field service and test modes |
| 150ms minimum reset timeout | Guarantees clock oscillators and memory stabilize before µP exit from reset state |
| Open-drain RESET with 0.4V VOL | Allows wired-OR configuration with other supervisors and compatibility with diverse µP reset input thresholds |
| Reverse OUT-to-IN leakage protection | 0.01µA typical - prevents backup power sources from back-feeding into main battery or charging circuitry |
| Thermal shutdown with hysteresis | +180°C trip / +160°C recovery - protects against sustained overload without latch-up |
| ±2.0% output accuracy over temperature | Ensures consistent logic-level compliance across full operating range without calibration |
Applications
| Handheld Instruments | USB Peripheral Devices |
|---|---|
Use Scenario: Powering ARM-based PDAs with real-time clock, touch controller, and flash memory. IC Role / Device Role / Timing Role: Primary 1.5V supply rail generator and power-on reset supervisor for application processor. Use Value: 82µA quiescent current extends standby battery life; MR pin allows hardware reset button integration without additional logic. |
Use Scenario: Regulating 1.5V for USB audio interface ICs and EEPROM in dongles. IC Role / Device Role / Timing Role: Low-noise LDO source and supervisor ensuring clean power sequencing during USB enumeration. Use Value: 150ms reset timeout satisfies USB 2.0 suspend/resume timing requirements; open-drain RESET interfaces directly with USB transceiver reset pin. |
| Bluetooth Modules | Digital Cameras |
Use Scenario: Supplying 1.5V to Bluetooth SoC RF section and baseband logic in compact wearables. IC Role / Device Role / Timing Role: Dual-role regulator/supervisor managing cold-start and link-recovery resets. Use Value: MR input enables host MCU to force Bluetooth stack restart without cycling main power; SOT23-6 footprint minimizes board area. |
Use Scenario: Providing 1.5V to image sensor interface and ISP core during burst capture sequences. IC Role / Device Role / Timing Role: Stable bias rail generator with fault-aware reset signaling for error recovery after power droop. Use Value: 55mV dropout at 150mA maintains regulation during high-current LED flash charging transients; thermal shutdown prevents overheating in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76315QDBVRQ1 | Fixed +1.5V, 150mA output, no MR pin, 300ms reset timeout, automotive-grade (-40°C to +125°C) | Lacks manual reset; suited for automotive infotainment where external reset control is unnecessary | Select when AEC-Q100 qualification and higher temperature range are mandatory, and MR is unused |
| ADM6315-29D3ARTZ-RL | Standalone reset IC (no LDO), +2.93V threshold, 200ms timeout, SOT23-3 package | Requires external 1.5V LDO; adds BOM count but offers independent reset timing adjustment | Select when system already includes a discrete 1.5V LDO and only supervisor functionality is needed |
Compared with TPS76315QDBVRQ1 and ADM6315-29D3ARTZ-RL, the MAX6471TA15AD3+ uniquely integrates manual reset control with 300mA LDO capability in a single SOT23-6 footprint - reducing component count and PCB space while enabling field-serviceable reset in portable designs.
Availability
MAX6471TA15AD3+ is available at Aetrix Electronics and suitable for handheld instruments, USB peripheral devices, Bluetooth modules, and digital cameras requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6471TA15AD3+ 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 and mixed-signal ICs for power management, sensing, and connectivity in resource-constrained systems.
The MAX6469–MAX6484 product line delivers integrated LDO regulators with microprocessor reset functionality specifically for battery-powered portable equipment where space, power efficiency, and reliable power sequencing are critical.
FAQ
What is the function of the MR pin on the MAX6471TA15AD3+?
The MR (Manual Reset) pin on the MAX6471TA15AD3+ is an active-low input that forces the RESET output low regardless of the regulator output voltage level. When pulled low, it asserts reset for the full duration of the selected timeout period (150ms min) after release. This enables hardware reset buttons, test jigs, or host MCUs to initiate controlled system restarts without interrupting the 1.5V supply rail - a key capability confirmed in the MAX6471–MAX6474 datasheet section "Manual Reset Input".
Does the MAX6471TA15AD3+ support adjustable output voltage?
Yes, the MAX6471TA15AD3+ supports adjustable output voltage via the SET pin. While configured for +1.5V fixed output by default (SET tied to GND), connecting SET to an external resistor divider between OUT and GND allows output adjustment from 1.25V to 5.5V using the formula VOUT = 1.229V × (1 + R1/R2). This dual-mode operation is explicitly documented in the "Detailed Description" and "Applications Information" sections of the MAX6469–MAX6484 datasheet.
What is the maximum input voltage rating for the MAX6471TA15AD3+?
The absolute maximum input voltage for the MAX6471TA15AD3+ is +7V, as specified in the Absolute Maximum Ratings table. However, the recommended operating input voltage range is 2.5V to 5.5V - this ensures guaranteed 300mA output current, ±2.0% output accuracy, and proper reset threshold tracking. Operation above 5.5V risks exceeding thermal limits and invalidates parametric guarantees, even if below the 7V absolute limit.
How does the MAX6471TA15AD3+ handle reverse current from OUT to IN?
The MAX6471TA15AD3+ includes internal reverse-current protection that limits OUT-to-IN leakage to 0.01µA typical when VOUT > VIN. This prevents backup batteries or supercapacitors connected at OUT from back-feeding into the main power source (e.g., a depleted Li-ion cell), preserving battery integrity. The feature is explicitly verified in the Electrical Characteristics table under "Input Reverse Leakage Current" and described in the "Reverse Leakage Protection" subsection of the datasheet.
Is the RESET output of the MAX6471TA15AD3+ push-pull or open-drain?
The RESET output of the MAX6471TA15AD3+ is open-drain, as confirmed by the Pin Description table (page 7) and Electrical Characteristics (page 4, VOL specification). It sinks up to 3.2mA with a maximum VOL of 0.4V and requires an external pullup resistor to the desired logic rail (e.g., VOUT or another supply). This configuration enables wired-OR connection with other reset sources and supports flexible voltage-level interfacing - a design choice specific to the MAX6471 variant group.
MAX6471TA15AD3+ 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 (1.5V)
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- -
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 136 µA
- Current - Supply (Max):
- 96 µA
- PSRR:
- -
- Control Features:
- Manual Reset, Reset
- 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 (3x3)
MAX6471TA15AD3+ FAQ
1.How can I place an order for MAX6471TA15AD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6471TA15AD3+ 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 MAX6471TA15AD3+ reliable?
The price and inventory of MAX6471TA15AD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6471TA15AD3+ is usually 5 days.
3.What payment methods are accepted for MAX6471TA15AD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6471TA15AD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6471TA15AD3+?
MAX6471TA15AD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6471TA15AD3+ 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 MAX6471TA15AD3+?
For technical support, including MAX6471TA15AD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6471TA15AD3+ requirements.
6.How does Aetrix verify that MAX6471TA15AD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6471TA15AD3+ 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 MAX6471TA15AD3+ meets industry standards.
7.What is the process for return or replacement of MAX6471TA15AD3+?
All MAX6471TA15AD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6471TA15AD3+, 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 MAX6471TA15AD3+ part is unused and in its original packaging.
Return procedure for MAX6471TA15AD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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