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Analog Devices Inc./Maxim Integrated MAX6476UT15AD1-T
- Part No.:
- MAX6476UT15AD1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX6476UT15AD1-T.pdf
- Description:
- IC REG LINEAR LDO WITH MPU RESET
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
The MAX6476UT15AD1-T from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 1.5V output voltage, -7.5% reset threshold accuracy, 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 voltage 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-T datasheet, MAX6476UT15AD1-T pinout, MAX6476UT15AD1-T application, or MAX6476UT15AD1-T equivalent, key selection considerations include its remote feedback (FB) pin for external NPN transistor boosting, shutdown capability (0.1µA), 55mV dropout at 150mA, and SOT23-6 package compatibility with space-constrained embedded power rails.
Technical Context
This device integrates an LDO regulator core with a precision reset supervisor sharing the same reference. The FB pin enables remote sensing and external pass transistor support, allowing total output current scaling beyond 300mA via NPN beta gain. Its reset logic asserts on VOUT falling below –7.5% of nominal (1.406V at 1.5V output) and holds RESET low for ≥2.5ms after recovery.
The regulator uses internal feedback resistors for fixed 1.5V operation (SET tied to GND), while SHDN provides active-low digital control to reduce supply current to 0.1µA. Input reverse leakage is limited to 0.01µA (typ), and thermal shutdown activates at +180°C with 20°C hysteresis - critical for unattended portable systems.
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 analog sensor rail without external resistor network. |
| Max Output Current | 300mA guaranteed - sufficient for single-core microcontrollers or RF transceivers in handheld devices. |
| Dropout Voltage | 55mV at 150mA load - enables regulation from 1.555V input, extending battery runtime in 2-cell alkaline or Li-ion applications. |
| Supply Current | 82µA operating / 0.1µA shutdown - minimizes quiescent drain during sleep modes in always-on IoT endpoints. |
| Reset Threshold | –7.5% of VOUT (1.406V min at 1.5V) - matches standard µP supply tolerance, eliminating need for discrete supervisor IC. |
| Reset Timeout | 2.5ms minimum - satisfies boot timing requirements for ARM Cortex-M0/M3 and similar processors. |
| Input Voltage Range | 2.5V to 5.5V - supports direct connection to USB VBUS, single Li-ion, or 3-cell alkaline sources. |
Pinout & Package
Package: 6-pin SOT23-6 (JEDEC MO-178AA), 2.9mm × 1.6mm footprint, exposed pad not present (TDFN variants have EP; this SOT23 variant does not).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator input | Accepts 2.5V–5.5V supply; requires 0.1µF bypass to GND for stability and noise rejection. |
| 2 (GND) | Power and thermal ground | Primary return path; must connect to large PCB copper area to dissipate heat and minimize ground bounce. |
| 3 (SHDN) | Active-low shutdown control | Pull low to disable regulator and reduce IQ to 0.1µA; tie to IN for normal operation. |
| 4 (RESET) | Active-low push-pull reset output | Drives µP RESET pin directly; asserts when VOUT < 1.406V or SHDN low; holds for ≥2.5ms after recovery. |
| 5 (FB) | Remote feedback sense input | Connects to load VCC point (not OUT) to compensate for PCB trace IR drop; enables external NPN boost configuration. |
| 6 (OUT) | Regulated output | Delivers 1.5V @ up to 300mA; requires ≥3.3µF low-ESR ceramic capacitor to GND for transient stability. |
Key Features
| Feature | Design Value |
|---|---|
| Remote feedback (FB) pin | Enables precise regulation at load point and supports external NPN transistor for >300mA total current (e.g., 1A with β=3.3). |
| Integrated reset supervisor | Eliminates discrete reset IC; monitors VOUT directly with –7.5% threshold and factory-trimmed 2.5ms timeout. |
| Ultra-low quiescent current | 82µA typical operating current ensures >1-year shelf life in coin-cell–powered sensors with periodic wake-up. |
| Reverse current protection | 0.01µA max OUT-to-IN leakage prevents backup capacitor or battery discharge when main supply is removed. |
| Thermal and short-circuit protection | Shuts down at +180°C junction temp with 20°C hysteresis; survives indefinite output short to GND. |
Applications
| Handheld Medical Sensors | Bluetooth LE Wearables |
|---|---|
|
Use Scenario: Continuous glucose monitor with ultra-low-power MCU and analog front-end running on CR2032 coin cell. IC Role / Device Role / Timing Role: Primary 1.5V power rail regulator and system reset supervisor during cold start and brownout. Use Value: 82µA quiescent current extends battery life to >18 months; FB pin compensates for 100mΩ PCB trace resistance to maintain ±2.7% accuracy at sensor node. |
Use Scenario: Compact fitness tracker with BLE SoC, accelerometer, and OLED display powered by single Li-ion cell. IC Role / Device Role / Timing Role: Stable 1.5V supply for BLE radio LDO input and deterministic reset assertion during battery voltage sag. Use Value: 55mV dropout at 150mA allows operation down to 1.555V input - enabling full utilization of Li-ion discharge curve to 3.0V cutoff. |
| Industrial Handheld Scanners | Smart Meter Communication Modules |
|
Use Scenario: Rugged barcode scanner with laser diode driver, imager, and ARM Cortex-M4 MCU operating in wide temperature range. IC Role / Device Role / Timing Role: Main 1.5V logic rail regulator with integrated reset to guarantee clean processor boot after battery insertion or hot-swap. Use Value: –40°C to +85°C rating and ±2.7% output accuracy ensure reliable operation across warehouse environments; SHDN pin enables MCU-controlled deep-sleep mode. |
Use Scenario: PLC-connected smart meter using NB-IoT module requiring regulated 1.5V supply and fail-safe reset during grid voltage fluctuations. IC Role / Device Role / Timing Role: Isolated 1.5V rail generator with remote sensing (via FB) to maintain accuracy despite long PCB traces between power stage and modem IC. Use Value: FB pin eliminates 40mV IR drop error at modem VCC; 2.5ms reset timeout satisfies 3GPP NB-IoT boot timing spec TS 36.101. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6475UT15AD1-T | Same family, identical 1.5V/–7.5%/2.5ms specs, but uses SET pin instead of FB - no remote sensing or external transistor support. | Suitable for simpler designs where output is local to regulator and current ≤300mA. | Select MAX6475UT15AD1-T if remote sensing or current boosting is unnecessary and board layout favors SET-based fixed-output configuration. |
| TPS76315QDBVRQ1 | Automotive-grade 1.5V LDO (300mA) with manual reset input (MR), no integrated reset supervisor or FB pin; 120mV dropout at 300mA. | Requires external reset IC for supervisor function; rated for AEC-Q100 Grade 3 (–40°C to +125°C). | Choose TPS76315QDBVRQ1 only for automotive under-hood applications needing extended temperature range and MR functionality - not a functional replacement for MAX6476UT15AD1-T's integrated reset/FB features. |
Compared with MAX6475UT15AD1-T, the MAX6476UT15AD1-T adds remote sensing and external transistor scalability; versus TPS76315QDBVRQ1, it integrates reset supervision and achieves half the dropout voltage, but lacks automotive qualification.
Availability
MAX6476UT15AD1-T is available at Aetrix Electronics and suitable for handheld medical sensors, Bluetooth LE wearables, industrial handheld scanners, and smart meter communication modules requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX6476UT15AD1-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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.
The MAX6469–MAX6484 product line delivers integrated LDO regulators with microprocessor reset functionality specifically for battery-powered portable equipment where space, quiescent current, and system-level reliability are critical.
FAQ
What is the exact output voltage tolerance and temperature range for the MAX6476UT15AD1-T?
The MAX6476UT15AD1-T provides 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 accuracy, line regulation, load regulation, and thermal drift - verified across production lots and guaranteed by correlation testing.
How does the FB pin on the MAX6476UT15AD1-T differ from the SET pin used in other variants like MAX6475UT15AD1-T?
The FB pin on the MAX6476UT15AD1-T is a dedicated remote feedback input that connects directly to the load VCC point, enabling compensation for PCB trace voltage drop and supporting external NPN transistor current boosting. In contrast, the SET pin on MAX6475UT15AD1-T serves as an adjustable feedback node for resistor-divider configurations - it cannot perform remote sensing and does not support external pass transistors.
Can the MAX6476UT15AD1-T be used without connecting the FB pin?
Yes - the MAX6476UT15AD1-T operates correctly with FB left unconnected or tied to OUT only if remote sensing is not required. However, for optimal accuracy under load, Maxim recommends connecting FB directly to the load's VCC point. Leaving FB floating is not advised, as it may cause regulation instability or inaccurate reset monitoring due to internal biasing uncertainty.
What is the minimum input voltage required for the MAX6476UT15AD1-T to maintain regulation at 300mA load?
At 300mA load, the MAX6476UT15AD1-T requires a minimum input voltage of 1.614V (1.5V + 114mV dropout), based on the datasheet's typical dropout voltage of 114mV at 300mA for VOUT = +1.5V. For reliable operation across process/voltage/temperature corners, design with ≥1.65V input margin to ensure regulation remains within specification.
Does the MAX6476UT15AD1-T support active-low push-pull RESET output, and how is it configured?
Yes - the MAX6476UT15AD1-T features an active-low push-pull RESET output, confirmed by its Pin Description table and Ordering Information suffix "D1", which denotes the 2.5ms timeout and push-pull configuration. No external pull-up resistor is needed, as the internal driver actively drives high or low - simplifying interface with µP reset inputs requiring driven signals rather than open-drain compatibility.
MAX6476UT15AD1-T 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-T FAQ
1.How can I place an order for MAX6476UT15AD1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6476UT15AD1-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 MAX6476UT15AD1-T reliable?
The price and inventory of MAX6476UT15AD1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6476UT15AD1-T is usually 5 days.
3.What payment methods are accepted for MAX6476UT15AD1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6476UT15AD1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6476UT15AD1-T?
MAX6476UT15AD1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6476UT15AD1-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 MAX6476UT15AD1-T?
For technical support, including MAX6476UT15AD1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6476UT15AD1-T requirements.
6.How does Aetrix verify that MAX6476UT15AD1-T is sourced from the original manufacturer or authorized distributors?
All MAX6476UT15AD1-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 MAX6476UT15AD1-T meets industry standards.
7.What is the process for return or replacement of MAX6476UT15AD1-T?
All MAX6476UT15AD1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6476UT15AD1-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 MAX6476UT15AD1-T part is unused and in its original packaging.
Return procedure for MAX6476UT15AD1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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