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Analog Devices Inc./Maxim Integrated MAX6476TA15BD3+T
- Part No.:
- MAX6476TA15BD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6476TA15BD3+T.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,990
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Product details
Overview
MAX6476TA15BD3+T from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, preset +1.5V output, -12.5% reset threshold accuracy, 150ms minimum reset timeout, and active-low push-pull RESET output. It operates from 2.5V to 5.5V input, delivers 82µA quiescent current, and supports shutdown mode with 0.1µA supply current - ideal for battery-powered portable systems requiring reliable power sequencing and brownout protection.
For engineers reviewing the MAX6476TA15BD3+T datasheet, MAX6476TA15BD3+T pinout, MAX6476TA15BD3+T application, or MAX6476TA15BD3+T equivalent, this device serves as a single-chip solution combining precision LDO regulation, microprocessor supervision, and remote feedback sensing - critical for compact, low-power embedded designs where board space and supply stability are constrained.
Technical Context
The MAX6476TA15BD3+T integrates a high-accuracy LDO core with a dedicated reset supervisor sharing the same reference voltage. Its remote feedback (FB) pin enables external NPN transistor use for higher-current applications, decoupling regulation control from the main output path while maintaining ±2.0% output voltage accuracy over -40°C to +85°C.
This variant belongs to the MAX6475/MAX6476/MAX6483/MAX6484 subgroup featuring FB instead of SET, supporting remote sense configurations. It uses an 8-pin TDFN-EP package with exposed paddle, requires no manual reset (MR) pin, and implements active-low push-pull RESET with fixed 150ms timeout and -12.5% VOUT threshold detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | +1.5V fixed - precisely regulated without external resistors; eliminates calibration overhead in low-voltage logic rails. |
| Max Output Current | 300mA guaranteed - sufficient to power microcontrollers, sensors, and RF modules without external boost stages. |
| Dropout Voltage | 55mV at 150mA - enables stable operation with minimal headroom (e.g., 1.55V input sustains 1.5V output), extending battery life. |
| Supply Current | 82µA typical - ultra-low quiescent draw preserves battery capacity during sleep modes in portable devices. |
| Reset Threshold | -12.5% of VOUT (1.3125V) - tight tolerance ensures early detection of supply collapse before processor malfunction. |
| Reset Timeout | 150ms minimum - provides sufficient hold-off time for clock stabilization and memory initialization after power recovery. |
| Shutdown Current | 0.1µA typical - near-zero leakage during system suspend, enabling multi-year operation on coin-cell batteries. |
| Input Voltage Range | 2.5V to 5.5V - compatible with single Li-ion, 3× alkaline, or USB-powered systems without intermediate conversion. |
Pinout & Package
MAX6476TA15BD3+T is housed in an 8-pin TDFN-EP (3mm × 3mm) package with exposed thermal pad. The EP pad must be soldered to PCB ground plane for optimal thermal dissipation and electrical grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator input | Accepts 2.5V–5.5V supply; bypass with 0.1µF capacitor to suppress high-frequency noise and ensure stability. |
| 2 (GND) | Ground reference & thermal path | Primary return path for regulator and reset circuits; connects internally to exposed paddle for enhanced heat transfer. |
| 3 (SHDN) | Active-low shutdown control | Pulling low disables regulator and reduces supply current to 0.1µA; connect to VIN for normal operation. |
| 4 (RESET) | Active-low push-pull reset output | Drives µP reset pin directly; asserts low during power-up, brownout, or shutdown; deasserts only after 150ms timeout and VOUT recovery. |
| 5 (FB) | Remote feedback sense input | Connects to load point (e.g., VCC rail) to compensate for PCB trace IR drop; enables precise regulation at point-of-load. |
| 6 (OUT) | Regulator output | Delivers regulated +1.5V; requires ≥3.3µF low-ESR ceramic capacitor at pin for transient response and stability. |
| 7,8 (EP) | Exposed thermal pad | Internally connected to GND; must be soldered to large copper area for thermal management - not an electrical signal pin. |
Key Features
| Feature | Design Value |
|---|---|
| Remote feedback (FB) pin | Enables point-of-load regulation by sensing voltage at the load rather than at the IC output, correcting for PCB trace losses up to ~100mV. |
| Integrated microprocessor reset | Eliminates need for external supervisor IC; provides deterministic reset assertion during undervoltage, power-up, and shutdown events. |
| Low dropout voltage (55mV @150mA) | Permits operation with minimal input–output differential, maximizing usable battery voltage range in 1.5V systems. |
| Thermal and short-circuit protection | Shuts down pass transistor at 180°C junction temperature with 20°C hysteresis; survives indefinite output short to ground. |
| Reverse current protection | Blocks backflow from OUT to IN (0.01µA typ), preventing battery discharge when external voltage is applied to output rail. |
| Ultra-low shutdown current (0.1µA) | Supports long-term storage and deep-sleep modes in IoT edge nodes and wearables powered by primary cells. |
Applications
| Handheld Medical Sensors | USB-Powered Data Loggers |
|---|---|
|
Use Scenario: Continuous ECG/SpO₂ monitoring using coin-cell battery and low-power MCU. IC Role / Device Role / Timing Role: Primary 1.5V power rail regulator with integrated reset supervision ensuring clean boot after battery insertion or voltage sag. Use Value: 82µA quiescent current extends battery life beyond 2 years; remote FB compensates for trace resistance in compact flex PCB layouts. |
Use Scenario: Field-deployable environmental sensor node powered via USB-C host port. IC Role / Device Role / Timing Role: Stable 1.5V supply for ADC and flash memory, with 150ms reset hold-off guaranteeing proper initialization before data capture begins. Use Value: Push-pull RESET drives MCU reset directly without pull-up resistor; 55mV dropout allows operation down to 1.55V input during USB voltage droop. |
| Bluetooth LE Audio Accessories | Industrial Handheld Scanners |
|
Use Scenario: Compact earbud charging case with integrated battery gauge and BLE SoC. IC Role / Device Role / Timing Role: Regulates 1.5V rail for digital baseband and RF sections; FB pin senses voltage at SoC VDD pins to maintain regulation under dynamic load switching. Use Value: -12.5% reset threshold triggers early fault response before BLE link loss; shutdown mode cuts system leakage to sub-µA during idle periods. |
Use Scenario: Rugged barcode scanner with replaceable alkaline battery pack and cold-temperature operation. IC Role / Device Role / Timing Role: Powers 1.5V logic and display driver from 3× alkaline stack; thermal shutdown protects against sustained high-current bursts during motor activation. Use Value: 300mA output supports peak loads during laser/decoder activation; TDFN-EP package withstands mechanical shock and wide-temp cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6476TA15BD2+T | Same package and FB architecture, but 20ms reset timeout instead of 150ms. | Suitable for fast-boot systems where shorter reset hold-off is acceptable (e.g., consumer remotes). | Select when faster system wake-up is prioritized over robust clock stabilization time. |
| TPS79915YZTT | LDO-only (no integrated reset); 1.5V fixed, 200mA, 82µA IQ, 5-pin DSBGA - lacks RESET, FB, and shutdown. | Requires external supervisor (e.g., TPS3808G15) for reset functionality, increasing BOM count and layout area. | Choose only if reset supervision is handled elsewhere and footprint minimization is secondary to cost. |
Compared with MAX6476TA15BD2+T, the MAX6476TA15BD3+T provides longer reset assertion for safer initialization of timing-sensitive peripherals; compared with TPS79915YZTT, it consolidates regulation and supervision into one die, reducing component count and improving supply coordination.
Availability
MAX6476TA15BD3+T is available at Aetrix Electronics and suitable for handheld medical sensors, USB-powered data loggers, Bluetooth LE audio accessories, and industrial handheld scanners requiring stable component supply across extended production lifecycles.
Supply support for MAX6476TA15BD3+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 precision analog and mixed-signal ICs for power management, sensing, and connectivity in demanding environments.
The MAX6469–MAX6484 family was engineered specifically for battery-constrained portable electronics needing combined LDO regulation and microprocessor supervision in minimal footprint - targeting PDAs, cellular handsets, and wireless modules.
FAQ
What is the function of the FB pin on the MAX6476TA15BD3+T?
The FB (feedback) pin on the MAX6476TA15BD3+T enables remote voltage sensing at the load point rather than at the IC's OUT pin. This allows compensation for PCB trace resistance and voltage drop, ensuring accurate +1.5V regulation at the actual device supply rail. It is not internally connected to OUT, making it suitable for high-current applications using an external NPN pass transistor - a capability unique to the MAX6475/MAX6476/MAX6483/MAX6484 variants.
Does the MAX6476TA15BD3+T support adjustable output voltage?
No, the MAX6476TA15BD3+T does not support adjustable output voltage. It is factory-configured for a fixed +1.5V output. Unlike SET-based variants (e.g., MAX6469–MAX6472), this part uses the FB pin exclusively for remote sensing or external transistor biasing - not for output voltage programming. The output voltage is determined by internal resistor ratios and cannot be modified externally.
What is the maximum input voltage the MAX6476TA15BD3+T can tolerate?
The MAX6476TA15BD3+T has an absolute maximum input voltage rating of +7V, but its functional operating range is specified from +2.5V to +5.5V. Operation above +5.5V risks exceeding safe power dissipation limits and may trigger thermal shutdown. For reliable performance in battery-powered systems, the recommended input is 2.5V–5.5V - covering single Li-ion, 3× alkaline, or USB 2.0/3.0 sources.
How does the reset timeout period work on the MAX6476TA15BD3+T?
The MAX6476TA15BD3+T features a fixed 150ms minimum reset timeout period (denoted by "D3" in the part number). Once the regulator output falls below the -12.5% reset threshold (1.3125V), RESET asserts low and remains low for at least 150ms after VOUT recovers above threshold - even if recovery occurs rapidly. This ensures µP clocks and memory stabilize before execution resumes, preventing erratic behavior during marginal supply conditions.
Can the MAX6476TA15BD3+T be used with an external NPN transistor for higher current?
Yes, the MAX6476TA15BD3+T is explicitly designed for use with an external NPN transistor via its FB pin. Connecting FB to the emitter of an NPN pass transistor (with base driven by OUT) allows current boosting beyond the 300mA IC limit. The total output current becomes IOUT × (β + 1), where β is the transistor's DC current gain. This configuration maintains regulation accuracy at the load while offloading power dissipation from the IC die.
MAX6476TA15BD3+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:
- 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 (3x3)
MAX6476TA15BD3+T FAQ
1.How can I place an order for MAX6476TA15BD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6476TA15BD3+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 MAX6476TA15BD3+T reliable?
The price and inventory of MAX6476TA15BD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6476TA15BD3+T is usually 5 days.
3.What payment methods are accepted for MAX6476TA15BD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6476TA15BD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6476TA15BD3+T?
MAX6476TA15BD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6476TA15BD3+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 MAX6476TA15BD3+T?
For technical support, including MAX6476TA15BD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6476TA15BD3+T requirements.
6.How does Aetrix verify that MAX6476TA15BD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6476TA15BD3+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 MAX6476TA15BD3+T meets industry standards.
7.What is the process for return or replacement of MAX6476TA15BD3+T?
All MAX6476TA15BD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6476TA15BD3+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 MAX6476TA15BD3+T part is unused and in its original packaging.
Return procedure for MAX6476TA15BD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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