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Analog Devices Inc./Maxim Integrated MAX6475TA25BD3+
- Part No.:
- MAX6475TA25BD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6475TA25BD3+.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:970
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Product details
Overview
MAX6475TA25BD3+ from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 2.5V output voltage, -7.5% reset threshold, 150ms minimum reset timeout, active-low push-pull RESET, and active-low SHDN control. It operates from 2.5V to 5.5V input, delivers ±2.0% output accuracy over temperature, and consumes only 82µA quiescent current - ideal for battery-powered portable systems requiring reliable power sequencing and brownout protection.
For engineers reviewing the MAX6475TA25BD3+ datasheet, MAX6475TA25BD3+ pinout, MAX6475TA25BD3+ application, or MAX6475TA25BD3+ equivalent, key selection considerations include its remote feedback (FB) capability for external NPN transistor boosting, 114mV dropout at 300mA, thermal shutdown at +180°C, reverse current protection (<0.01µA OUT→IN), and compatibility with compact 8-pin TDFN-EP packaging for space-constrained embedded designs.
Technical Context
The MAX6475TA25BD3+ integrates a precision LDO regulator core and a fully self-contained reset supervisor sharing the same reference. Its FB pin enables remote sensing of load voltage or connection to an external NPN pass transistor - enabling higher-current applications without sacrificing regulation accuracy at the point-of-load.
This variant belongs to the MAX6475/MAX6476/MAX6483/MAX6484 subgroup featuring dedicated FB (not SET) for remote sense or high-current boost configurations, distinct from SET-based adjustable-output variants. It uses a -7.5% VOUT reset threshold with 150ms timeout (D3 suffix), push-pull RESET output, and active-low SHDN - no manual reset (MR) pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±2.0% over -40°C to +85°C - ensures stable core logic supply for microcontrollers and sensors. |
| Max Output Current | 300mA guaranteed - sufficient for mid-power SoCs, RF modules, and peripheral ICs in portable devices. |
| Dropout Voltage | 114mV at 300mA - enables operation down to VIN = 2.614V while maintaining regulated 2.5V output. |
| Quiescent Current | 82µA typical - extends battery life in always-on monitoring or sleep-mode applications. |
| Reset Threshold | -7.5% of nominal VOUT (i.e., 2.3125V) - triggers RESET before microprocessor supply tolerance violation. |
| Reset Timeout | 150ms minimum - provides sufficient hold-off time for clock stabilization and memory initialization. |
| Shutdown Current | 0.1µA typical - enables ultra-low-power system suspend states with full regulator disable. |
| Input Voltage Range | 2.5V to 5.5V - supports single-cell Li-ion, 2–3-cell alkaline, or USB-powered systems. |
Pinout & Package
MAX6475TA25BD3+ is housed in an 8-pin TDFN-EP (3mm × 3mm) package with exposed paddle (EP) internally connected to GND. The EP must be soldered to a PCB ground plane for thermal management and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator Input | Accepts 2.5V–5.5V supply; requires 0.1µF bypass capacitor to GND for stability. |
| 2 (GND) | Ground / Thermal Pad | Primary return path and heatsink; must connect to large copper area or ground plane. |
| 3 (SHDN) | Active-Low Shutdown Control | Pull low to disable regulator and reduce supply current to 0.1µA; tie to IN for normal operation. |
| 4 (RESET) | Active-Low Push-Pull Reset Output | Drives µP reset pin directly; asserts low during power-up, brownout, or SHDN activation. |
| 5 (FB) | Remote Feedback Sense Input | Connects to load VCC for precise remote voltage regulation or to external NPN base for current boosting. |
| 6 (OUT) | Regulated Output | Delivers up to 300mA at 2.5V; requires ≥3.3µF low-ESR ceramic capacitor to GND. |
| 7–8 (EP) | Exposed Paddle | Internally tied to GND; mandatory thermal connection to PCB ground plane for safe operation. |
Key Features
| Feature | Design Value |
|---|---|
| Remote Feedback (FB) Pin | Enables point-of-load regulation or external NPN transistor current boosting - supports >1A total load when paired with suitable transistor. |
| Integrated Microprocessor Reset | Eliminates need for discrete supervisor IC; provides deterministic 150ms reset assertion after power stabilization. |
| Low Dropout & Ultra-Low IQ | 114mV dropout at full 300mA load + 82µA quiescent current - maximizes usable battery voltage range and runtime. |
| Reverse Current Protection | <0.01µA OUT→IN leakage - prevents backup capacitors or batteries from back-feeding into depleted input sources. |
| Thermal & Short-Circuit Protection | Auto-shutdown at +180°C junction temp with 20°C hysteresis; 450mA min current limit - ensures robustness under fault conditions. |
| Push-Pull RESET Output | Directly drives microcontroller reset inputs without pull-up resistor - simplifies BOM and improves noise immunity. |
Applications
| Handheld Medical Sensors | Industrial IoT Edge Nodes |
|---|---|
|
Use Scenario: Portable blood glucose meters and pulse oximeters powered by coin-cell or single Li-ion batteries. IC Role / Device Role: Primary 2.5V power rail generator with integrated reset for MCU and analog front-end, enabling clean boot and brownout recovery. Use Value: 82µA quiescent current extends shelf life; FB pin allows remote sensing at sensor PCB location to compensate for trace IR drop. |
Use Scenario: Battery-backed wireless sensor nodes deployed in remote locations with 10+ year lifetime requirements. IC Role / Device Role: System power manager providing regulated 2.5V to MCU, radio, and EEPROM, with automatic reset on battery sag. Use Value: 150ms reset timeout ensures RF transceiver clocks stabilize before transmission; shutdown mode draws <0.1µA during deep sleep. |
| USB-C Powered Peripherals | Automotive Infotainment Accessories |
|
Use Scenario: Compact USB-C dongles (HDMI, Ethernet, serial adapters) drawing power directly from host port. IC Role / Device Role: Local 2.5V LDO for FPGA configuration logic and interface ICs, with RESET synchronized to VBUS presence. Use Value: 2.5V–5.5V input range accepts full USB-C PD negotiation range; push-pull RESET eliminates external pull-up and saves board space. |
Use Scenario: Aftermarket OBD-II adapters and dashcams powered from vehicle 12V via DC-DC pre-regulator. IC Role / Device Role: Secondary 2.5V rail for microcontroller and CAN transceiver, with robust brownout detection across wide temperature range. Use Value: -40°C to +85°C rating and ±2.0% output accuracy ensure reliable operation in automotive cabin environments; thermal shutdown prevents failure during hot-car scenarios. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0525PDBVR | 250mA LDO, no integrated reset, 1.5µA IQ, SOT-23-5 package | Requires external supervisor IC for reset functionality; lower IQ but no built-in timing or threshold control | Select when ultra-low standby power dominates over integration; add TLV809 or similar for reset. |
| ADM6315-25ARTZ-R7 | Standalone 2.5V reset supervisor (no LDO), 1.6µA IQ, SOT-23-3 | Provides only reset function; must pair with separate LDO like ADM7172ACPZ-R7 for full solution | Choose when design already uses a different LDO and only reset supervision is needed. |
Compared with TPS7A0525PDBVR and ADM6315-25ARTZ-R7, the MAX6475TA25BD3+ delivers full power management integration - combining 300mA LDO regulation, precise -7.5% reset threshold, 150ms timeout, and FB-based remote sensing in one 8-pin TDFN - reducing component count, layout area, and qualification effort for battery-critical systems.
Availability
MAX6475TA25BD3+ is available at Aetrix Electronics and suitable for handheld medical sensors, industrial IoT edge nodes, USB-C powered peripherals, and automotive infotainment accessories requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6475TA25BD3+ 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 space- and power-constrained portable electronics needing tightly integrated, low-quiescent-current LDOs with factory-configurable reset supervision - eliminating discrete supervisors and minimizing bill-of-materials.
FAQ
What is the exact output voltage and tolerance of the MAX6475TA25BD3+?
The MAX6475TA25BD3+ provides a fixed 2.5V output voltage with ±2.0% accuracy over the full operating temperature range (-40°C to +85°C). This specification is guaranteed across load currents from 1mA to 300mA and input voltages from 2.5V to 5.5V, making it suitable for precision analog and digital logic rails where tight regulation is required. The MAX6475TA25BD3+ does not require external resistors to set this voltage.
How does the FB pin on the MAX6475TA25BD3+ differ from the SET pin used in other MAX64xx variants?
The FB pin on the MAX6475TA25BD3+ is a dedicated remote feedback input that connects directly to the internal error amplifier - unlike the SET pin found on MAX6469–MAX6472 variants, which serves dual-mode (fixed/adjustable) configuration. The FB pin enables true remote voltage sensing at the load or connection to an external NPN transistor base for current boosting, without internal resistor-divider loading. This architecture is exclusive to MAX6475/MAX6476/MAX6483/MAX6484 devices.
What reset timeout period is implemented in the MAX6475TA25BD3+ and how is it selected?
The MAX6475TA25BD3+ implements a 150ms minimum reset timeout period, indicated by the "D3" suffix in its part number. This value is factory-programmed and non-adjustable. The timeout begins when the regulator output rises above the -7.5% reset threshold (2.3125V) and ensures the RESET signal remains asserted for at least 150ms to guarantee microprocessor clock and memory initialization before release. No external components are needed to configure this timing.
Does the MAX6475TA25BD3+ support reverse current protection, and what is its leakage specification?
Yes, the MAX6475TA25BD3+ includes integrated reverse current protection. When the output voltage exceeds the input voltage (e.g., during battery swap or supercapacitor hold-up), the OUT-to-IN leakage current is limited to 0.01µA typical (1.5µA max), preventing back-feeding into the input source. This feature is critical for systems using backup capacitors or secondary batteries, and is explicitly characterized in the Electrical Characteristics table under "Input Reverse Leakage Current".
What package type and thermal characteristics apply to the MAX6475TA25BD3+?
The MAX6475TA25BD3+ is supplied in an 8-pin TDFN-EP package (3mm × 3mm) with exposed paddle. Its thermal resistance θJC is 41°C/W, and maximum continuous power dissipation at +70°C ambient is 1951mW (derating 24.4mW/°C above +70°C). The exposed paddle must be soldered to a PCB ground plane to achieve rated performance and prevent thermal shutdown during sustained 300mA operation.
MAX6475TA25BD3+ 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 (2.5V)
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- 0.25V @ 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 (3x3)
MAX6475TA25BD3+ FAQ
1.How can I place an order for MAX6475TA25BD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6475TA25BD3+ 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 MAX6475TA25BD3+ reliable?
The price and inventory of MAX6475TA25BD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6475TA25BD3+ is usually 5 days.
3.What payment methods are accepted for MAX6475TA25BD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6475TA25BD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6475TA25BD3+?
MAX6475TA25BD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6475TA25BD3+ 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 MAX6475TA25BD3+?
For technical support, including MAX6475TA25BD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6475TA25BD3+ requirements.
6.How does Aetrix verify that MAX6475TA25BD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6475TA25BD3+ 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 MAX6475TA25BD3+ meets industry standards.
7.What is the process for return or replacement of MAX6475TA25BD3+?
All MAX6475TA25BD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6475TA25BD3+, 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 MAX6475TA25BD3+ part is unused and in its original packaging.
Return procedure for MAX6475TA25BD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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