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Analog Devices Inc./Maxim Integrated MAX6476TA15AD1-T
- Part No.:
- MAX6476TA15AD1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6476TA15AD1-T.pdf
- Description:
- IC REG LINEAR LDO WITH MPU RESET
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6476TA15AD1-T from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 1.5V output, -12.5% reset threshold, 2.5ms minimum reset timeout, and active-low push-pull RESET output. It operates from 2.5V to 5.5V input, delivers ±2.7% output accuracy over -40°C to +85°C, and consumes only 82µA quiescent current - ideal for battery-powered handheld instruments and Bluetooth modules.
For engineers reviewing the MAX6476TA15AD1-T datasheet, MAX6476TA15AD1-T pinout, MAX6476TA15AD1-T application, or MAX6476TA15AD1-T equivalent, key selection criteria include its remote feedback (FB) capability for external NPN transistor boosting, shutdown current of 0.1µA (typ), 55mV dropout at 150mA, and compatibility with 3.3µF low-ESR output capacitance in space-constrained portable designs.
Technical Context
The MAX6476TA15AD1-T implements a dual-function LDO core with integrated supervisor logic sharing the same reference voltage. Its FB pin enables true remote sensing - physically disconnecting the feedback path from OUT to monitor voltage at the load point, supporting external NPN pass transistors for higher-current applications up to IOUT(total) = 300mA × β(min).
Reset assertion is triggered when FB falls below 87.5% of nominal VOUT (i.e., 1.3125V for 1.5V output), with guaranteed 35µs propagation delay from FB dip to RESET assertion and a fixed 2.5ms (min) timeout period. The device includes undervoltage lockout (2.25V–2.47V), thermal shutdown (180°C), and reverse current protection (0.01µA OUT→IN leakage).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±2.7% over -40°C to +85°C - ensures stable core voltage for low-power microcontrollers and RF ICs. |
| Max Output Current | 300mA guaranteed - sufficient to power baseband processors or sensor subsystems without external boost. |
| Dropout Voltage | 55mV at 150mA - enables operation with minimal headroom (e.g., 1.555V input sustains 1.5V output), critical for single-cell Li-ion systems. |
| Quiescent Current | 82µA typical - extends battery life in always-on monitoring circuits; drops to 0.1µA in shutdown mode. |
| Reset Threshold | -12.5% of VOUT (1.3125V) - provides tighter supply monitoring than -7.5% variants, suitable for noise-sensitive digital loads. |
| Reset Timeout | 2.5ms minimum - fast enough for rapid boot sequences while avoiding false resets during transient dips. |
| Input Voltage Range | 2.5V to 5.5V - supports direct connection to USB, 3.3V rails, or two-cell alkaline batteries. |
Pinout & Package
MAX6476TA15AD1-T is housed in an 8-pin TDFN-EP (3mm × 3mm) package with exposed paddle (EP) internally connected to GND. Thermal performance is optimized by soldering EP to a large PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator Input | Bypassed to GND with 0.1µF capacitor; accepts 2.5V–5.5V input; powers internal LDO and reset circuitry. |
| 2 (GND) | Ground / Thermal Pad | Primary electrical return and thermal dissipation path; must be connected to large copper area for 1951mW max power handling. |
| 3 (SHDN) | Active-Low Shutdown Control | Pulled high to IN for normal operation; asserts shutdown when ≤0.3×VIN, reducing supply current to 0.1µA. |
| 4 (RESET) | Active-Low Push-Pull Reset Output | Drives µP reset pin directly; sinks 3.2mA at 0.4V; remains asserted for ≥2.5ms after VOUT recovery. |
| 5 (FB) | Remote Feedback Sense Input | Connects to load VCC point (not OUT); enables precise regulation under PCB IR drop; supports external NPN transistor current boosting. |
| 6 (OUT) | Regulator Output | Delivers regulated 1.5V; requires ≥3.3µF low-ESR ceramic capacitor at pin for stability and transient response. |
| EP | Exposed Paddle | Internally tied to GND; provides low thermal resistance path (θJA ≈ 41°C/W); must be soldered to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Remote Feedback (FB) Pin | Enables true load-point regulation and external NPN transistor current boosting - extends usable output current beyond 300mA while maintaining tight voltage accuracy at the load. |
| Low Dropout at Full Load | 114mV at 300mA (for 1.5V output) - allows operation with only 1.614V input, maximizing battery utilization in single-cell systems. |
| Integrated Microprocessor Reset | Eliminates need for discrete supervisor IC; provides factory-trimmed -12.5% threshold and 2.5ms timeout - reduces BOM count and board area. |
| Reverse Current Protection | 0.01µA typical OUT→IN leakage - prevents backup capacitors or batteries from discharging into depleted input sources during hot-swap or battery removal. |
| Thermal & Short-Circuit Protection | Shuts down at 180°C junction temperature with 20°C hysteresis; survives indefinite output short - ensures robustness in unattended embedded deployments. |
Applications
| Handheld Medical Sensors | Bluetooth LE Audio Transceivers |
|---|---|
Use Scenario: Portable pulse oximeter with optical front-end and BLE radio operating from coin-cell battery. IC Role / Device Role / Timing Role: Primary 1.5V supply for analog signal chain and BLE SoC core; FB pin senses voltage directly at SoC VDD pins to compensate for PCB trace resistance. Use Value: 82µA quiescent current extends battery life to >12 months; 2.5ms reset timeout ensures reliable BLE reconnection after brownout without firmware intervention. |
Use Scenario: Wearable earbud charging case with integrated battery gauge and wireless charging receiver. IC Role / Device Role / Timing Role: Regulates 1.5V rail for fuel-gauge IC and charging controller; SHDN pin controlled by system MCU to disable power during deep sleep. Use Value: 0.1µA shutdown current minimizes self-discharge; remote FB sensing maintains ±2.7% accuracy despite 150mΩ PCB trace resistance between regulator and load. |
| Industrial IoT Edge Node | USB-Powered Test Fixture |
Use Scenario: Battery-backed LoRaWAN node with temperature/humidity sensor and MCU, deployed in remote locations. IC Role / Device Role / Timing Role: Supplies 1.5V to ultra-low-power MCU and sensor interface; RESET output triggers watchdog reset on supply sag during cold temperature startup. Use Value: -40°C to +85°C rating ensures operation in outdoor enclosures; 55mV dropout enables use with aging primary lithium batteries down to 1.55V. |
Use Scenario: Automated test fixture that draws power from USB host port and powers DUT requiring clean 1.5V supply. IC Role / Device Role / Timing Role: Provides regulated 1.5V from noisy 5V USB rail; RESET monitors output to halt test sequence if voltage sags during high-current DUT switching. Use Value: 75µVRMS output noise (typ) meets sensitive analog test requirements; push-pull RESET drives test controller GPIO without pull-up resistor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6476TA15AD2-T | Same 1.5V output and FB pin, but 20ms reset timeout instead of 2.5ms. | Suitable for systems requiring longer reset hold time to ensure full clock stabilization before processor release. | Select when longer reset assertion is needed for complex boot sequences; not interchangeable without firmware timing review. |
| TPS7A0515PDBVR | LDO-only (no reset circuit); 1.5V fixed, 200mA, 25µA IQ; SOT-23-5 package. | Requires external supervisor IC (e.g., TPS3808G01) for reset functionality - increases component count and layout area. | Choose only if reset timing is handled elsewhere and ultra-low IQ (<30µA) is prioritized over integration. |
Compared with MAX6476TA15AD1-T, the MAX6476TA15AD2-T offers extended reset duration for demanding boot flows, while the TPS7A0515PDBVR trades integration for lower quiescent current and smaller footprint - neither is pin-compatible, and both require PCB redesign or additional components to replicate the integrated reset and FB functionality.
Availability
MAX6476TA15AD1-T is available at Aetrix Electronics and suitable for handheld medical sensors, Bluetooth LE audio transceivers, industrial IoT edge nodes, USB-powered test fixtures, and battery-backed data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6476TA15AD1-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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management solutions for industrial, automotive, and communications markets.
The MAX6469–MAX6484 product line was designed specifically for space- and power-constrained portable electronics needing integrated power regulation and microprocessor supervision in a single compact package.
FAQ
What is the function of the FB pin on the MAX6476TA15AD1-T?
The FB (Feedback) pin on the MAX6476TA15AD1-T is a dedicated remote sense input that connects directly to the load's VCC point-not to the OUT pin-enabling precise regulation at the point of load despite PCB trace resistance. This pin also supports external NPN transistor current boosting, allowing total output current to scale with transistor beta while maintaining 1.5V accuracy at the load. The MAX6476TA15AD1-T uses this FB path exclusively for regulation and reset monitoring.
Does the MAX6476TA15AD1-T support adjustable output voltage?
No, the MAX6476TA15AD1-T does not support adjustable output voltage. It is a fixed 1.5V output device. While earlier family members like MAX6469–MAX6472 use the SET pin for adjustable operation, the MAX6476TA15AD1-T belongs to the FB-series subgroup (MAX6475/MAX6476/MAX6483/MAX6484) where pin 5 is repurposed as FB-not SET-and internal resistors fix VOUT at 1.5V. No external resistor network can alter this voltage.
What is the maximum continuous output current the MAX6476TA15AD1-T can deliver?
The MAX6476TA15AD1-T guarantees a minimum continuous output current of 300mA across -40°C to +85°C, with current limiting set at 450mA (min). At 300mA load and 1.5V output, dropout is 114mV - meaning it sustains regulation with as little as 1.614V input. Derating applies above +70°C ambient due to thermal limits: the 8-pin TDFN package dissipates up to 1951mW at +70°C, decreasing by 24.4mW/°C above that temperature.
How does the reset timeout period work on the MAX6476TA15AD1-T?
The MAX6476TA15AD1-T has a fixed 2.5ms minimum reset timeout period (denoted by suffix "D1"). Once RESET is asserted-due to FB falling below 87.5% of 1.5V (1.3125V), input UVLO, or SHDN activation-it remains low for at least 2.5ms after the fault condition clears. This ensures the microprocessor remains held in reset long enough for clocks and supplies to stabilize. The actual timeout may extend slightly due to process variation, but will never fall below 2.5ms.
Can the MAX6476TA15AD1-T be used with a backup supercapacitor?
Yes, the MAX6476TA15AD1-T supports backup supercapacitor operation. When the IN supply is removed, the device enters low-leakage state (40µA OUT-to-GND typical) and asserts RESET to signal power loss. The regulated 1.5V output can be maintained by a supercapacitor connected at the FB node (or OUT), preserving volatile memory or enabling graceful shutdown. Reverse current protection (0.01µA OUT→IN) prevents the supercapacitor from discharging back into a depleted input source.
MAX6476TA15AD1-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- 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):
- -
- PSRR:
- -
- Control Features:
- Enable, 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-EP (3x3)
MAX6476TA15AD1-T FAQ
1.How can I place an order for MAX6476TA15AD1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6476TA15AD1-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 MAX6476TA15AD1-T reliable?
The price and inventory of MAX6476TA15AD1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6476TA15AD1-T is usually 5 days.
3.What payment methods are accepted for MAX6476TA15AD1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6476TA15AD1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6476TA15AD1-T?
MAX6476TA15AD1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6476TA15AD1-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 MAX6476TA15AD1-T?
For technical support, including MAX6476TA15AD1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6476TA15AD1-T requirements.
6.How does Aetrix verify that MAX6476TA15AD1-T is sourced from the original manufacturer or authorized distributors?
All MAX6476TA15AD1-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 MAX6476TA15AD1-T meets industry standards.
7.What is the process for return or replacement of MAX6476TA15AD1-T?
All MAX6476TA15AD1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6476TA15AD1-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 MAX6476TA15AD1-T part is unused and in its original packaging.
Return procedure for MAX6476TA15AD1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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