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Analog Devices Inc./Maxim Integrated MAX6476UT15AD1
- Part No.:
- MAX6476UT15AD1
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX6476UT15AD1.pdf
- Description:
- IC REG LINEAR LDO 300MA
- Quantity:
- Payment:
- Shipping:
Inventory:637
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Product details
Overview
MAX6476UT15AD1 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 reset timeout, and remote feedback (FB) pin for external NPN transistor current boosting. 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 instrumentation and wireless modules.
For engineers reviewing the MAX6476UT15AD1 datasheet, MAX6476UT15AD1 pinout, MAX6476UT15AD1 application, or MAX6476UT15AD1 equivalent, this page provides verified technical context, validated pin functions, confirmed reset timing and accuracy, real-world application mappings, and two rigorously cross-checked alternative parts for design continuity and supply resilience.
Technical Context
The MAX6476UT15AD1 integrates a precision LDO regulator core with a dedicated reset supervisor sharing the same reference voltage. Its FB pin enables remote sensing and external NPN pass transistor configuration, supporting higher load currents via current gain multiplication (IOUT(TOTAL) = IOUT × (β+1)). The device uses a -12.5% reset threshold (VTHOUT = 87.5% of nominal VOUT) and guarantees 2.5ms minimum reset timeout (D1 suffix).
It features active-low shutdown (SHDN), reverse current protection (0.01µA OUT→IN leakage), thermal shutdown at +180°C with 20°C hysteresis, and internal current limiting (450mA min). The regulator maintains stability with ≥3.3µF ceramic output capacitor (ESR < 0.2Ω) and supports operation across full industrial temperature range (-40°C to +85°C).
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 or sensor biasing without external resistor network. |
| Max Output Current | 300mA guaranteed - sufficient for microcontrollers, RF transceivers, or small FPGA I/O banks in portable systems. |
| Dropout Voltage | 55mV at 150mA, 114mV at 300mA - enables regulation from 2.5V input down to 1.5V output with minimal headroom loss. |
| Quiescent Current | 82µA typical - extends battery life in always-on monitoring devices like Bluetooth sensors or handheld meters. |
| Reset Threshold | -12.5% of VOUT (i.e., 1.3125V for 1.5V output) - triggers reset before microprocessor supply tolerance violation per JEDEC JESD8-12. |
| Reset Timeout | 2.5ms minimum - satisfies boot-time stabilization requirements for ARM Cortex-M0/M3 and similar embedded processors. |
| Shutdown Current | 0.1µA typical - reduces system standby power to nanoampere level during deep sleep modes. |
Pinout & Package
MAX6476UT15AD1 is packaged in a 6-pin SOT23-6 (JEDEC MO-178AA) with exposed paddle (EP) internally connected to GND. Thermal performance is optimized by soldering EP to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator Input | Accepts 2.5V–5.5V supply; requires 0.1µF bypass capacitor to GND for noise suppression and stability. |
| 2 (GND) | Ground / Thermal Pad | Primary electrical return and thermal dissipation path; must be connected to large copper area or ground plane. |
| 3 (SHDN) | Active-Low Shutdown Control | Pulled high to IN for normal operation; pulling low disables regulator and reduces supply current to 0.1µA. |
| 4 (RESET) | Active-Low Reset Output | Push-pull configuration; asserts low during power-up, brownout, or SHDN activation; holds low for ≥2.5ms after recovery. |
| 5 (FB) | Remote Feedback Sense | Connects to external load point (e.g., VCC rail) to compensate for PCB trace IR drop; enables external NPN boost configuration. |
| 6 (OUT) | Regulated Output | Delivers 1.5V at up to 300mA; requires ≥3.3µF low-ESR ceramic capacitor to GND for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Remote Feedback (FB) Pin | Enables precise regulation at load point and supports external NPN transistor for >300mA total current delivery. |
| Integrated Microprocessor Reset | Eliminates need for discrete supervisor IC; provides factory-trimmed -12.5% threshold and 2.5ms timeout with push-pull RESET. |
| Ultra-Low Quiescent Current | 82µA operating / 0.1µA shutdown - critical for multi-year battery life in IoT edge nodes and portable medical devices. |
| Reverse Current Protection | 0.01µA max OUT→IN leakage - prevents back-powering of source during battery swap or backup capacitor hold-up. |
| Thermal & Short-Circuit Protection | Auto-recovering thermal shutdown at +180°C with 20°C hysteresis; 450mA current limit protects against sustained overload. |
Applications
| Handheld Test Instruments | Bluetooth Audio Modules |
|---|---|
|
Use Scenario: Portable multimeter or oscilloscope probe with ARM-based MCU and analog front-end requiring clean, stable 1.5V reference and reliable power-on reset. IC Role / Device Role / Timing Role: Primary 1.5V LDO regulator and integrated reset generator ensuring deterministic boot sequence and rail integrity monitoring. Use Value: Eliminates discrete supervisor and saves board space; 82µA IQ extends alkaline battery life beyond 12 months in sleep mode. |
Use Scenario: Low-latency Bluetooth LE audio transmitter with DAC and RF section needing tightly regulated 1.5V supply and fast reset assertion on voltage sag. IC Role / Device Role / Timing Role: Core power regulator with 2.5ms reset timeout synchronized to codec initialization timing. Use Value: Push-pull RESET drives baseband processor's nRESET directly; remote FB compensates for 50mΩ PCB trace resistance. |
| PCMCIA/USB Peripheral Cards | Digital Camera Sensor Bias |
|
Use Scenario: Compact USB-to-serial adapter card drawing power from host USB port, requiring robust undervoltage lockout and reset during hot-plug events. IC Role / Device Role / Timing Role: Input voltage supervisor and LDO delivering regulated 1.5V to UART IC and EEPROM, asserting RESET during VIN dip below 2.47V. Use Value: 2.25V UVLO threshold prevents malfunction during USB port voltage droop; SHDN allows host-controlled power gating. |
Use Scenario: CMOS image sensor module with analog pixel array requiring ultra-stable 1.5V bias supply and glitch-free reset during exposure sequencing. IC Role / Device Role / Timing Role: Precision LDO with remote FB connection to sensor VDD pin, ensuring <±10mV regulation error under dynamic load. Use Value: 55mV dropout at 150mA enables use with single-cell Li-ion (3.0V min); 75µVRMS noise (per family spec) minimizes sensor readout noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6476UT15BD1 | Same package and pinout; differs only in reset threshold (-7.5% vs. -12.5%) and timeout (2.5ms same). | Suitable where tighter supply tolerance monitoring is required (e.g., high-speed ADC reference rails). | Select MAX6476UT15BD1 if system requires earlier reset assertion at -7.5% VOUT deviation. |
| TPS76315QDBVRQ1 | Automotive-grade 1.5V LDO (300mA) with manual reset input but no integrated reset supervisor or FB pin. | Requires external RC timer or supervisor IC for reset functionality; lacks remote sense capability. | Choose TPS76315QDBVRQ1 only when AEC-Q100 qualification is mandatory and external reset circuitry is acceptable. |
Compared with MAX6476UT15BD1 and TPS76315QDBVRQ1, the MAX6476UT15AD1 uniquely combines factory-trimmed -12.5% reset threshold, 2.5ms timeout, remote FB, and 6-pin SOT23 footprint - enabling compact, self-contained power management for space-constrained portable designs without external components.
Availability
MAX6476UT15AD1 is available at Aetrix Electronics and suitable for handheld instruments, Bluetooth modules, PCMCIA cards, and digital camera subsystems requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance.
Supply support for MAX6476UT15AD1 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 battery-powered portable equipment requiring integrated power regulation and microprocessor supervision in minimal footprint - targeting PDAs, USB peripherals, and wireless modules.
FAQ
What is the exact output voltage tolerance and temperature range for MAX6476UT15AD1?
The MAX6476UT15AD1 delivers a fixed 1.5V output with ±2.7% accuracy over the full industrial temperature range of -40°C to +85°C, as specified in the Electrical Characteristics table for MAX6469–MAX6476 devices. This tolerance includes initial calibration, line/load regulation, and temperature drift effects - verified across production lots and guaranteed by correlation testing.
Does MAX6476UT15AD1 support remote voltage sensing, and how is it implemented?
Yes, MAX6476UT15AD1 supports remote voltage sensing via its FB pin (Pin 5). Unlike standard regulators, FB is not internally tied to OUT; instead, it connects directly to the load point (e.g., microcontroller VCC pin) to compensate for PCB trace voltage drop. This configuration is explicitly documented in the Functional Diagram and Typical Operating Circuit for MAX6475/MAX6476 variants.
What reset timeout period and threshold does the 'D1' suffix indicate for MAX6476UT15AD1?
The 'D1' suffix in MAX6476UT15AD1 specifies a 2.5ms minimum reset timeout period. The 'A' in the third position indicates a -12.5% reset threshold (i.e., VTHOUT = 87.5% of nominal VOUT = 1.3125V). Both parameters are factory-trimmed and guaranteed across temperature and process variation.
Can MAX6476UT15AD1 drive more than 300mA, and if so, how?
Yes - MAX6476UT15AD1 can support higher output current using its FB pin with an external NPN transistor, as shown in Figure 2 of the datasheet. The total deliverable current becomes IOUT(TOTAL) = 300mA × (β + 1), where β is the transistor's DC current gain. The device's FB pin enables direct control of the external pass element while maintaining regulation accuracy and protection features.
Is MAX6476UT15AD1 pin-compatible with other devices in the MAX6469–MAX6484 family?
MAX6476UT15AD1 shares identical 6-pin SOT23-6 pinout and function mapping with all MAX6475/MAX6476/MAX6483/MAX6484 variants in the same package. Pin 1 (IN), Pin 2 (GND), Pin 3 (SHDN), Pin 4 (RESET), Pin 5 (FB), and Pin 6 (OUT) retain consistent roles across these parts - enabling drop-in replacement within the same output voltage and reset configuration group.
MAX6476UT15AD1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- 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:
- SOT-23-6
MAX6476UT15AD1 FAQ
1.How can I place an order for MAX6476UT15AD1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6476UT15AD1 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 MAX6476UT15AD1 reliable?
The price and inventory of MAX6476UT15AD1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6476UT15AD1 is usually 5 days.
3.What payment methods are accepted for MAX6476UT15AD1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6476UT15AD1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6476UT15AD1?
MAX6476UT15AD1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6476UT15AD1 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 MAX6476UT15AD1?
For technical support, including MAX6476UT15AD1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6476UT15AD1 requirements.
6.How does Aetrix verify that MAX6476UT15AD1 is sourced from the original manufacturer or authorized distributors?
All MAX6476UT15AD1 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 MAX6476UT15AD1 meets industry standards.
7.What is the process for return or replacement of MAX6476UT15AD1?
All MAX6476UT15AD1 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6476UT15AD1, 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 MAX6476UT15AD1 part is unused and in its original packaging.
Return procedure for MAX6476UT15AD1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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