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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 LINEAR LDO 300MA
- Quantity:
- Payment:
- Shipping:
Inventory:959
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Product details
Overview
MAX6476TA15BD3 from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, preset 1.5V output voltage, -12.5% reset threshold accuracy (suffix 'B'), and 150ms minimum reset timeout (suffix 'D3'). It features 82µA quiescent current, 55mV dropout at 150mA, and shutdown current of 0.1µA (typ). Designed for battery-powered portable equipment including Bluetooth modules and digital cameras.
For engineers reviewing the MAX6476TA15BD3 datasheet, MAX6476TA15BD3 pinout, MAX6476TA15BD3 application, or MAX6476TA15BD3 equivalent, key selection criteria include its fixed 1.5V output, remote feedback (FB) capability, active-low push-pull/open-drain RESET, TDFN-EP package thermal performance, and compatibility with external NPN pass transistors for higher-current implementations.
Technical Context
The MAX6476TA15BD3 implements a dual-function architecture: an LDO regulator core with ±2.0% output voltage accuracy over -40°C to +85°C and a fully integrated reset supervisor sharing the same reference. Its FB pin enables remote sensing-critical for maintaining regulation at high-current loads where PCB trace resistance causes voltage drop between OUT and load.
Reset logic asserts active-low RESET when FB falls below 85% of nominal VOUT (i.e., 1.275V for 1.5V output), with guaranteed assertion before 90% and no assertion until ≤87.5%. The 150ms minimum timeout ensures stable power-up sequencing for microprocessors requiring ≥100ms stabilization before execution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±2.0% over full temperature range - 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 from single-cell Li-ion (3.0V min) down to 1.55V input while maintaining regulation. |
| Quiescent Current | 82µA typical - extends battery life in always-on monitoring applications such as wireless sensor nodes. |
| Reset Threshold | -12.5% of VOUT (85–90% VOUT range) - provides tighter supply monitoring than -7.5% variants for noise-sensitive analog circuits. |
| Reset Timeout | 150ms minimum - satisfies boot timing requirements for ARM Cortex-M0/M3 and similar MCUs with internal PLL lock time. |
| Shutdown Current | 0.1µA typical - reduces system standby power to sub-microwatt levels during deep-sleep modes. |
Pinout & Package
MAX6476TA15BD3 is housed in an 8-pin TDFN-EP (3mm × 3mm, 0.5mm pitch) package with exposed paddle (EP) internally connected to GND. Thermal performance is optimized via EP soldering to PCB ground plane, enabling 1951mW max power dissipation at +70°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator Input | Accepts 2.5V–5.5V input; requires 0.1µF bypass to GND for stability and transient response. |
| 2 (GND) | Ground / Thermal Pad | Primary electrical return and thermal path; must be soldered to large copper area for junction temperature control. |
| 3 (SHDN) | Active-Low Shutdown Control | Pulled high to IN for normal operation; pulling low disables regulator and reduces IQ to 0.1µA. |
| 4 (RESET) | Active-Low Reset Output | Push-pull or open-drain configurable; asserts low during power-up, brownout, or SHDN activation. |
| 5 (FB) | Remote Feedback Sense | Connects directly to load VCC point to compensate for PCB IR drop; enables external NPN transistor for >300mA loads. |
| 6 (OUT) | Regulator Output | Delivers regulated 1.5V; requires ≥3.3µF low-ESR ceramic capacitor at output for loop stability. |
| 7–8 (EP) | Exposed Paddle | Internally tied to GND; mandatory connection to PCB ground plane for thermal management and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Remote Feedback (FB) Pin | Enables precise regulation at load point despite PCB trace resistance; supports external NPN pass transistor for scalable current up to 1A+. |
| Integrated Microprocessor Reset | Eliminates need for discrete supervisor IC; guarantees reset assertion before VOUT drops below 85% of 1.5V (1.275V). |
| Low Dropout & Quiescent Current | 55mV dropout at 150mA + 82µA IQ enables >95% efficiency at light loads and extended runtime in coin-cell or single-cell Li-ion systems. |
| Thermal & Short-Circuit Protection | 180°C thermal shutdown with 20°C hysteresis prevents damage during sustained overload; 450mA current limit protects against output shorts. |
| Reverse Current Protection | 0.01µA typical OUT-to-IN leakage prevents backfeeding into depleted batteries or backup capacitors during power loss. |
Applications
| Bluetooth Module Power Management | Digital Camera Core Logic Supply |
|---|---|
|
Use Scenario: Powers baseband processor and RF transceiver in compact Bluetooth audio devices with single Li-ion cell. IC Role / Device Role / Timing Role: Provides stable 1.5V core voltage and generates synchronized reset pulse after battery insertion or wake-up event. Use Value: Remote FB sensing maintains 1.5V ±2% at SoC VDD pins despite 50mΩ PCB trace resistance; 150ms reset timeout aligns with BT controller boot sequence. |
Use Scenario: Supplies image signal processor (ISP) and memory interface in ultra-thin digital cameras with tight thermal constraints. IC Role / Device Role / Timing Role: Delivers low-noise 1.5V rail and asserts RESET until ISP clock oscillator stabilizes post-power-up. Use Value: 82µA quiescent current minimizes standby drain; TDFN-EP package enables placement near heat-sensitive CMOS sensors. |
| USB Peripheral Power Regulation | Industrial Handheld Instrument Supply |
|
Use Scenario: Regulates 1.5V for USB 2.0 PHY and microcontroller in bus-powered dongles and adapters. IC Role / Device Role / Timing Role: Acts as primary LDO with integrated reset to ensure clean enumeration and prevent USB protocol errors. Use Value: 55mV dropout allows operation from USB 5V down to 1.55V input; SHDN pin enables host-controlled power gating. |
Use Scenario: Powers MCU, display driver, and precision ADC in handheld test equipment operating from alkaline or Li-ion batteries. IC Role / Device Role / Timing Role: Serves as main system regulator with fault detection, asserting RESET during brownout or thermal events. Use Value: -40°C to +85°C rating ensures reliability in field environments; reverse leakage protection prevents battery discharge when unit is off. |
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 | Same 1.5V output and FB pin, but 20ms reset timeout instead of 150ms. | Suitable for fast-boot MCUs (e.g., PIC16F) requiring shorter reset hold time. | Select when system boot time budget is <50ms and reset timing must be tighter. |
| TPS7A1615DRBR | 1.5V fixed LDO with 200mA output, no integrated reset, no FB pin, 17µA IQ. | Requires external supervisor IC (e.g., TPS3808G18) for reset functionality. | Choose if lower quiescent current is critical and board space allows separate reset IC. |
Compared with MAX6476TA15BD2, the MAX6476TA15BD3 provides longer reset assertion for robust initialization of complex processors; compared with TPS7A1615DRBR, it integrates reset supervision and remote sensing but consumes higher quiescent current-making it optimal for systems prioritizing integration and load-point regulation over ultra-low standby power.
Availability
MAX6476TA15BD3 is available at Aetrix Electronics and suitable for Bluetooth modules, digital cameras, USB peripherals, and industrial handheld instruments requiring stable component supply across extended temperature ranges and long production lifecycles.
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, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX6469–MAX6484 product line was engineered specifically for battery-powered portable electronics needing highly integrated, low-quiescent-current power regulation with reliable microprocessor supervision-eliminating discrete supervisors and reducing bill-of-materials count.
FAQ
What is the function of the FB pin on the MAX6476TA15BD3?
The FB (Feedback) pin on the MAX6476TA15BD3 enables remote voltage sensing at the load rather than at the regulator output. This compensates for voltage drop across PCB traces or connectors. When used with an external NPN transistor, it also allows current boosting beyond the 300mA internal limit. For MAX6476TA15BD3, FB connects directly to the load's VCC node to maintain 1.5V regulation accuracy under dynamic load conditions.
Does the MAX6476TA15BD3 support both push-pull and open-drain RESET configurations?
Yes, the MAX6476TA15BD3 supports both push-pull and open-drain active-low RESET outputs. The configuration is determined by external circuitry: connect RESET to VOUT through a pullup resistor for open-drain operation; leave unconnected for push-pull. This flexibility allows direct interfacing with diverse microcontroller reset inputs, including those requiring weak pullups or level-shifting.
What is the significance of the 'D3' suffix in MAX6476TA15BD3?
The 'D3' suffix in MAX6476TA15BD3 specifies a 150ms minimum reset timeout period. This value is selected from Maxim's Reset Timeout Delay Guide and ensures the RESET signal remains asserted for at least 150ms after VOUT rises above the 85% threshold, providing sufficient time for microprocessor clocks and internal logic to stabilize before execution begins.
Can the MAX6476TA15BD3 operate with an input voltage below 2.5V?
No, the MAX6476TA15BD3 has a minimum input voltage of 2.5V per its Absolute Maximum Ratings and Electrical Characteristics tables. Operation below this violates specification and may result in undervoltage lockout (VUVLO = 2.25V to 2.47V) or failure to regulate. For sub-2.5V inputs, consider alternative regulators such as the MAX1725 or TPS780xx series.
How does the MAX6476TA15BD3 handle reverse current flow from OUT to IN?
The MAX6476TA15BD3 incorporates internal reverse-current protection that limits OUT-to-IN leakage to 0.01µA typical when VOUT > VIN. This prevents backfeeding into a depleted battery or backup capacitor. During such conditions, RESET remains asserted until VIN exceeds VOUT and VOUT rises above the 85% reset threshold, ensuring system integrity during power transitions.
MAX6476TA15BD3 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):
- 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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