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Analog Devices Inc./Maxim Integrated MAX6471TA15AD3+T
- Part No.:
- MAX6471TA15AD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6471TA15AD3+T.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,436
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Product details
Overview
The MAX6471TA15AD3+T from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 1.5V output, -12.5% reset threshold accuracy, and 150ms minimum reset timeout. It features active-low manual reset (MR) input, 82µA quiescent current, and operates from 2.5V to 5.5V input. Designed for battery-powered portable electronics requiring reliable power sequencing and brownout protection.
For engineers reviewing the MAX6471TA15AD3+T datasheet, MAX6471TA15AD3+T pinout, MAX6471TA15AD3+T application, or MAX6471TA15AD3+T equivalent, this device delivers verified 1.5V regulation with integrated supervisor functionality - eliminating external reset ICs in space-constrained handheld and wireless modules where supply stability, shutdown control, and manual reset assertion are critical.
Technical Context
The MAX6471TA15AD3+T integrates a precision LDO core with a dedicated reset supervisor sharing the same reference voltage. Its MR input provides TTL/CMOS-compatible manual reset assertion while VOUT remains in specification, with internal 40kΩ pullup to VOUT and 200ns MR-to-RESET delay.
Reset behavior is defined by a -12.5% VOUT threshold (90% of nominal), 150ms minimum timeout (D3 suffix), and push-pull or open-drain RESET output. Shutdown is not supported on this variant - only MAX6469/MAX6470/MAX6473–MAX6478/MAX6481–MAX6484 include SHDN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed +1.5V ±2.7% over -40°C to +85°C - ensures stable core logic or sensor rail without external feedback components. |
| Max Output Current | 300mA guaranteed - sufficient for microcontrollers, Bluetooth baseband ICs, or small FPGA I/O banks. |
| Dropout Voltage | 55mV at 150mA load - enables operation down to VIN = 1.555V, critical for single-cell Li-ion or alkaline systems near end-of-life. |
| Quiescent Current | 82µA typical - extends battery life in always-on monitoring circuits such as wearable health sensors. |
| Reset Threshold | -12.5% of VOUT (i.e., 1.3125V min) - triggers RESET before microprocessor supply tolerance violation per JEDEC JESD8-12A. |
| Reset Timeout | 150ms minimum - satisfies boot-time stabilization requirements for ARM Cortex-M0+ and similar MCUs. |
| Input Voltage Range | 2.5V to 5.5V - compatible with USB-powered peripherals, 3.3V system rails, and dual-cell alkaline inputs. |
Pinout & Package
Package: 8-pin TDFN-EP (3mm × 3mm, exposed paddle). Thermal performance optimized via EP soldered to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator Input | Accepts 2.5V–5.5V supply; requires 0.1µF ceramic bypass to GND for stability and noise rejection. |
| 2 (GND) | Ground / Thermal Pad | Primary electrical return and thermal path; must be connected to large copper area for <110°C/W junction-to-ambient resistance. |
| 3 (MR) | Manual Reset Input | Active-low; internally pulled up to VOUT (40kΩ typ); asserts RESET when pulled ≤0.3×VOUT; supports switch or logic-driven reset initiation. |
| 4 (RESET) | Active-Low Reset Output | Push-pull configuration; sinks ≥3.2mA at 0.4V; holds µP in reset until VOUT stabilizes and 150ms timeout expires. |
| 5 (SET) | Feedback Reference Input | Connected to GND for fixed 1.5V mode; open or floating not allowed; leakage <±100nA avoids output drift. |
| 6 (OUT) | Regulated Output | Delivers 1.5V @ 300mA; requires ≥3.3µF low-ESR ceramic capacitor at output for transient response and PSRR optimization. |
| EP | Exposed Paddle | Internally tied to GND; must be soldered to PCB ground plane - not used as signal connection. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Manual Reset | MR input enables field-serviceable or user-initiated system reset without power cycle - no external debouncing required. |
| Low Dropout at Full Load | 114mV dropout at 300mA ensures >1.386V output with 1.5V input - supports ultra-low-voltage battery operation. |
| Microprocessor-Grade Reset Accuracy | ±2.0% output voltage accuracy and -12.5% reset threshold guarantee deterministic boot timing across temperature and load. |
| Reverse Current Protection | 0.01µA typical OUT-to-IN leakage prevents backup capacitor discharge into depleted battery during hot-swap events. |
| Thermal & Short-Circuit Robustness | 180°C thermal shutdown with 20°C hysteresis and 450mA current limit protect against sustained overload in compact enclosures. |
Applications
| Handheld Medical Sensors | Bluetooth LE Audio Transceivers |
|---|---|
Use Scenario: Continuous ECG monitoring in disposable patch sensors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Primary 1.5V supply for analog front-end and BLE SoC; MR enables clinical staff-triggered recalibration reset. Use Value: 82µA quiescent current extends 3V CR2032 life beyond 12 months; 150ms reset timeout ensures full ADC initialization before data capture. |
Use Scenario: Power management in true wireless stereo (TWS) earbud charging case with embedded BLE controller. IC Role / Device Role / Timing Role: Stable 1.5V rail for BLE radio and touch interface MCU; RESET coordinates firmware boot after lid-open detection. Use Value: -12.5% reset threshold prevents spurious reboots during battery voltage sag during wireless charging bursts. |
| Industrial Handheld Scanners | USB-C Peripheral Hubs |
Use Scenario: Rugged barcode scanner operating from removable 2xAA alkaline pack in warehouse environments. IC Role / Device Role / Timing Role: Main 1.5V logic supply with MR wired to mechanical trigger button for hardware-initiated firmware recovery. Use Value: 55mV dropout at 150mA allows operation down to 1.555V - extends usable battery range by ~18% versus legacy LDOs. |
Use Scenario: Compact multi-port USB-C hub with integrated PD controller and display interface. IC Role / Device Role / Timing Role: Dedicated 1.5V rail for USB PHY termination and level-shifting logic; RESET synchronizes enumeration after VBUS attach. Use Value: Push-pull RESET eliminates need for external pull-up resistor - reduces BOM count and layout area in 12mm × 12mm hub PCB. |
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 | 150mA max output, no MR input, 3.5µA IQ, SOT-23-5 package | Lacks manual reset; suitable only where software-controlled reset suffices | Select if ultra-low IQ dominates over reset flexibility and higher current demand |
| ADM6315-29ARTZ-RL7 | Standalone reset IC (no LDO), 2.93V threshold, 200ms timeout, SOT-23-3 | Requires external 1.5V LDO; adds component count but offers independent reset tuning | Choose when reset timing or threshold must be decoupled from regulation path |
Compared with TPS76315QDBVRQ1 and ADM6315-29ARTZ-RL7, the MAX6471TA15AD3+T uniquely integrates 300mA LDO regulation, manual reset, and precise -12.5% supervision in one 8-pin TDFN - reducing board area by 32% and eliminating inter-component timing skew in battery-critical designs.
Availability
MAX6471TA15AD3+T is available at Aetrix Electronics and suitable for handheld medical sensors, Bluetooth LE audio transceivers, industrial handheld scanners, and USB-C peripheral hubs requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX6471TA15AD3+T 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 high-performance analog and mixed-signal ICs for power management, sensing, and communication applications.
The MAX6469–MAX6484 product line targets battery-powered portable equipment requiring integrated power regulation and microprocessor supervision - delivering single-chip solutions that replace discrete LDO + supervisor combinations.
FAQ
What output voltage does the MAX6471TA15AD3+T deliver, and how is it set?
The MAX6471TA15AD3+T delivers a fixed +1.5V output. This is determined by the "15" suffix in the part number, indicating 1.5V per Maxim's Output Voltage Suffix Guide. The SET pin must be connected to GND to enable fixed-output mode; leaving it floating or applying external resistors invalidates the 1.5V specification and may cause regulation failure. The device achieves ±2.7% accuracy over -40°C to +85°C.
Does the MAX6471TA15AD3+T support shutdown functionality?
No, the MAX6471TA15AD3+T does not include a shutdown (SHDN) input. Shutdown capability is only present in MAX6469/MAX6470/MAX6473–MAX6478/MAX6481–MAX6484 variants. The MAX6471TA15AD3+T belongs to the MR-enabled subgroup (MAX6471–MAX6474/MAX6479–MAX6482) and instead provides an active-low manual reset (MR) input for system-level reset initiation while the output remains in regulation.
What is the function of the MR pin on the MAX6471TA15AD3+T, and how should it be used?
The MR (Manual Reset) pin on the MAX6471TA15AD3+T is an active-low input that asserts the RESET output regardless of VOUT status - enabling hardware-initiated resets during normal operation. It features an internal 40kΩ pullup to VOUT, so it can be driven by a normally-open switch to GND or standard logic outputs. No external debounce is needed; the device includes 120ns glitch rejection and 200ns MR-to-RESET propagation delay. Do not leave MR floating.
What reset timeout period is implemented in the MAX6471TA15AD3+T?
The "D3" suffix in MAX6471TA15AD3+T specifies a 150ms minimum reset timeout period, per Maxim's Reset Timeout Delay Guide. This means RESET remains asserted for at least 150ms after VOUT rises above the -12.5% threshold (1.3125V) or after MR returns high. The actual timeout may extend slightly due to process variation but will never fall below 150ms, ensuring compatibility with ARM Cortex-M and similar microcontrollers' boot timing requirements.
Can the MAX6471TA15AD3+T be used with input voltages below 2.5V?
No - the MAX6471TA15AD3+T has a specified input voltage range of 2.5V to 5.5V. Operation below 2.5V violates Absolute Maximum Ratings and causes unpredictable behavior, including failure to regulate, premature undervoltage lockout (VUVLO = 2.25V min), or uncontrolled RESET assertion. For sub-2.5V applications, consider the MAX1725 or MAX8860 families, which support 1.8V input minimum.
MAX6471TA15AD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX6471TA15AD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6471TA15AD3+T 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+T reliable?
The price and inventory of MAX6471TA15AD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6471TA15AD3+T is usually 5 days.
3.What payment methods are accepted for MAX6471TA15AD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6471TA15AD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6471TA15AD3+T?
MAX6471TA15AD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6471TA15AD3+T 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+T?
For technical support, including MAX6471TA15AD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6471TA15AD3+T requirements.
6.How does Aetrix verify that MAX6471TA15AD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6471TA15AD3+T 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+T meets industry standards.
7.What is the process for return or replacement of MAX6471TA15AD3+T?
All MAX6471TA15AD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6471TA15AD3+T, 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+T part is unused and in its original packaging.
Return procedure for MAX6471TA15AD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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