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Analog Devices Inc./Maxim Integrated MAX6476TA15BD3+
- Part No.:
- MAX6476TA15BD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6476TA15BD3+.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,831
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Product details
Overview
MAX6476TA15BD3+ from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 1.5V output, -7.5% reset threshold, 150ms 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 portable systems requiring reliable power sequencing and brownout protection.
For engineers reviewing the MAX6476TA15BD3+ datasheet, MAX6476TA15BD3+ pinout, MAX6476TA15BD3+ application, or MAX6476TA15BD3+ equivalent, this device serves as a single-chip solution combining precision LDO regulation, programmable reset timing, shutdown control, and remote feedback capability - critical for space-constrained, low-power embedded designs in handheld instruments and wireless modules.
Technical Context
The MAX6476TA15BD3+ integrates a high-accuracy bandgap-referenced LDO core with a dedicated reset supervisor sharing the same reference. Its regulator uses an internal resistor divider to fix VOUT at 1.5V (±2.7% over temperature), while the reset circuit monitors FB (not OUT) to detect voltage drop below 92.5% of nominal - enabling precise remote sensing. The device implements thermal shutdown at +180°C with 20°C hysteresis and includes reverse current protection limiting OUT-to-IN leakage to 0.01µA.
It features active-low SHDN for 0.1µA shutdown current, push-pull RESET with 0.3V VOL at 50µA sink, and a dedicated FB pin for remote voltage sensing - distinct from SET-based adjustable variants. The 8-pin TDFN-EP package provides low thermal resistance (41°C/W junction-to-case) and requires JEDEC-compliant reflow per J-STD-020A.
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 supply for low-voltage microcontrollers. |
| Max Output Current | 300mA guaranteed - sufficient to power SoCs, RF transceivers, or sensor subsystems without external pass devices. |
| Dropout Voltage | 114mV at 300mA load - enables operation down to VIN = 1.614V, extending battery runtime in single-cell Li-ion or alkaline systems. |
| Reset Threshold | -7.5% (92.5% of 1.5V = 1.3875V) - triggers RESET before microprocessor supply tolerance violation, preventing erratic execution. |
| Reset Timeout | 150ms minimum - provides adequate stabilization time for clock oscillators and memory initialization after power-up. |
| Quiescent Current | 82µA typical - minimizes standby drain in always-on battery-backed applications like Bluetooth modules. |
| Shutdown Current | 0.1µA typical - enables ultra-low-power sleep modes in portable instrumentation and wearables. |
Pinout & Package
MAX6476TA15BD3+ is housed in an 8-pin TDFN-EP (3mm × 3mm, 0.5mm pitch) package with exposed paddle thermally connected to GND. The EP pad must be soldered to a PCB ground plane for optimal thermal performance and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator input | Accepts 2.5V–5.5V supply; bypass with 0.1µF ceramic capacitor to GND for stability. |
| 2 (GND) | Ground reference & thermal path | Electrical return and primary heat dissipation node; 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; pull high to VIN for normal operation. |
| 4 (RESET) | Active-low push-pull reset output | Drives µP reset pin directly; sinks 50µA at 0.3V VOL; asserts during power-up, brownout, or SHDN assertion. |
| 5 (FB) | Remote feedback sense input | Connects to load VCC point to compensate for PCB trace IR drop; enables accurate regulation at point-of-load. |
| 6 (OUT) | Regulator output | Delivers regulated 1.5V; requires ≥3.3µF low-ESR ceramic output capacitor for stability. |
| 7, 8 (NC) | No-connect terminals | Not internally bonded; leave unconnected per Maxim design guidelines. |
| EP (Exposed Paddle) | Thermal ground | Internally tied to GND; must be soldered to PCB ground plane to achieve specified thermal resistance (41°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated microprocessor reset | Eliminates need for external supervisor IC by providing factory-trimmed -7.5% threshold and 150ms timeout. |
| Remote feedback (FB) pin | Enables point-of-load regulation by sensing voltage at the load instead of at the IC output, compensating for PCB IR drop. |
| Low dropout & quiescent current | 114mV dropout at 300mA + 82µA IQ extends usable battery range in single-cell systems without sacrificing load capability. |
| Reverse current protection | 0.01µA max OUT-to-IN leakage prevents backup capacitors or batteries from discharging into the main supply rail. |
| Thermal and short-circuit protection | Auto-shutdown at +180°C with 20°C hysteresis and 450mA current limit ensure robustness under fault conditions. |
Applications
| Handheld Instruments | Wireless Modules |
|---|---|
|
Use Scenario: Power management in battery-operated PDAs and digital multimeters with real-time clock backup. IC Role / Device Role / Timing Role: Provides stable 1.5V supply to MCU core and asserts RESET until VCC stabilizes post-battery insertion. Use Value: Ensures deterministic boot sequence and prevents data corruption during cold-start or battery swap events. |
Use Scenario: Voltage regulation and reset supervision in Bluetooth Low Energy (BLE) sensor nodes. IC Role / Device Role / Timing Role: Delivers clean 1.5V to BLE SoC while monitoring VCC via FB pin to reject noise from RF switching. Use Value: Maintains radio link integrity by guaranteeing reset assertion during RF-induced supply droop or antenna coupling. |
| Notebook Subsystems | USB Peripheral Devices |
|
Use Scenario: Dedicated 1.5V rail for embedded controller (EC) or touchpad ASIC in ultrabooks. IC Role / Device Role / Timing Role: Regulates EC supply independently from main CPU VRM and sequences reset with 150ms delay. Use Value: Enables independent EC firmware updates and secure boot without interfering with host CPU power state transitions. |
Use Scenario: Powering USB-C audio adapters with integrated DAC and headphone amplifier. IC Role / Device Role / Timing Role: Supplies 1.5V bias to analog front-end while using FB pin to sense voltage at DAC VDD pin. Use Value: Compensates for 100mΩ PCB trace resistance, ensuring <±1% output regulation at the sensitive analog circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6476TA15BD4+ | Same 1.5V output and -7.5% reset threshold, but 1200ms reset timeout instead of 150ms. | Suitable for systems requiring longer processor initialization windows (e.g., FPGA configuration or flash boot). | Select MAX6476TA15BD4+ only if extended reset hold-off is required; otherwise MAX6476TA15BD3+ provides optimal timing for fast-boot MCUs. |
| TPS7A0515PDBVR | LDO-only (no reset function); 1.5V fixed output, 200mA rating, 25µA IQ - lacks integrated supervisor and FB pin. | Requires external reset IC (e.g., TPS3808G15) and cannot perform remote sensing. | Choose only if system already includes discrete reset supervision and board area allows separate components. |
Compared with MAX6476TA15BD4+, the MAX6476TA15BD3+ offers tighter reset timing for rapid-boot applications; compared with TPS7A0515PDBVR, it integrates reset and remote sensing - reducing BOM count and PCB footprint by two components.
Availability
MAX6476TA15BD3+ is available at Aetrix Electronics and suitable for handheld instruments, wireless modules, and USB peripheral devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6476TA15BD3+ 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 applications.
The MAX6469–MAX6484 family was engineered specifically for battery-powered portable equipment needing integrated LDO regulation and microprocessor reset in minimal footprint - targeting handheld instruments, PCMCIA cards, and wireless modules.
FAQ
What is the exact output voltage tolerance of the MAX6476TA15BD3+ over temperature?
The MAX6476TA15BD3+ guarantees ±2.7% output voltage accuracy over the full -40°C to +85°C operating range. This specification applies to fixed-output operation (SET grounded or FB used per datasheet Figure 2), and is measured with 1mA ≤ IOUT ≤ 300mA load. At +25°C, typical accuracy improves to ±1.3%, but design margin must be based on the worst-case ±2.7% limit.
How does the FB pin function in the MAX6476TA15BD3+ compared to the SET pin in other MAX64xx variants?
In the MAX6476TA15BD3+, the FB pin is a dedicated remote sense input connected directly to the internal error amplifier - it is not internally tied to OUT and enables true point-of-load regulation. Unlike SET (used for adjustable outputs in MAX6469–MAX6472), FB allows the device to monitor voltage at the load (e.g., MCU VCC pin) and correct for PCB trace IR drop, maintaining 1.5V regulation accuracy at the destination rather than at the IC output.
Can the MAX6476TA15BD3+ be used without connecting the FB pin?
No - the MAX6476TA15BD3+ requires the FB pin to be connected to the regulated output node (VCC) for proper operation. Unlike variants with SET pins, this device has no internal feedback divider; FB is its sole feedback path. Leaving FB floating or unconnected will cause regulation failure and unstable output. Per datasheet Pin Description, FB must be connected to the external load to obtain the fixed 1.5V output.
What is the maximum allowable input voltage for the MAX6476TA15BD3+?
The MAX6476TA15BD3+ supports an absolute maximum input voltage of +7V on the IN pin, but its functional operating range is limited to 2.5V to 5.5V per Electrical Characteristics. Operation above 5.5V violates the recommended conditions and may cause excessive power dissipation or thermal shutdown. For 1.5V output, minimum functional VIN is 1.614V (1.5V + 114mV dropout), but the device requires ≥2.5V to enable internal circuitry including the reset supervisor.
Does the MAX6476TA15BD3+ support manual reset functionality via an external signal?
No - the MAX6476TA15BD3+ does not include a manual reset (MR) input. Manual reset is only available in the MAX6471–MAX6474/MAX6479–MAX6482 variants. The MAX6476TA15BD3+ provides only SHDN-controlled shutdown and FB-monitored reset; assertion of RESET occurs solely due to undervoltage on FB, input UVLO, or SHDN activation - not external MR signals.
MAX6476TA15BD3+ 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:
- 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+ FAQ
1.How can I place an order for MAX6476TA15BD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6476TA15BD3+ 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+ reliable?
The price and inventory of MAX6476TA15BD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6476TA15BD3+ is usually 5 days.
3.What payment methods are accepted for MAX6476TA15BD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6476TA15BD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6476TA15BD3+?
MAX6476TA15BD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6476TA15BD3+ 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+?
For technical support, including MAX6476TA15BD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6476TA15BD3+ requirements.
6.How does Aetrix verify that MAX6476TA15BD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6476TA15BD3+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX6476TA15BD3+?
All MAX6476TA15BD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6476TA15BD3+, 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+ part is unused and in its original packaging.
Return procedure for MAX6476TA15BD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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