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Analog Devices Inc./Maxim Integrated MAX6472TA15AD3+
- Part No.:
- MAX6472TA15AD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6472TA15AD3+.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,849
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Product details
Overview
MAX6472TA15AD3+ from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 1.5V output, ±2.0% accuracy over -40°C to +85°C, 114mV dropout at 300mA load, and active-low open-drain RESET with 150ms timeout. It serves as power supply and system supervisor in portable battery-powered microprocessor systems.
For engineers reviewing the MAX6472TA15AD3+ datasheet, MAX6472TA15AD3+ pinout, MAX6472TA15AD3+ application, or MAX6472TA15AD3+ equivalent, key selection criteria include guaranteed 300mA output current, 82µA quiescent current, manual reset (MR) input support, shutdown capability, and compatibility with 1.5V-core logic in space-constrained handheld devices.
Technical Context
The MAX6472TA15AD3+ integrates a precision LDO regulator and a dedicated reset supervisor sharing the same voltage reference. Its MR input enables external assertion of reset while VOUT remains within specification, and internal 40kΩ pullup to VOUT eliminates need for external biasing. The device uses a dual-mode SET pin-grounded for fixed 1.5V output, or configured with external resistors for adjustable operation-but MAX6472 is factory-configured for fixed output.
It features thermal shutdown at +180°C with 20°C hysteresis, reverse OUT-to-IN leakage protection (<0.01µA), and short-circuit current limiting (450mA min). The open-drain RESET output supports direct interface with µP reset inputs requiring active-low assertion and 150ms minimum timeout after fault recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±2.0% over full temperature range - ensures stable core supply for low-voltage logic without external feedback components. |
| Max Output Current | 300mA guaranteed - sufficient to power ARM Cortex-M0/M3 cores, sensor hubs, or Bluetooth baseband ICs directly. |
| Dropout Voltage | 114mV at 300mA - enables regulation from 1.614V input, critical for single-cell Li-ion or alkaline battery operation down to end-of-life. |
| Quiescent Current | 82µA typical - extends battery life in always-on monitoring modes (e.g., RTC backup, wake-on-event circuits). |
| Reset Timeout | 150ms minimum - satisfies boot timing requirements for most 8/16-bit microcontrollers and avoids premature release from reset. |
| Reset Threshold | -7.5% of nominal VOUT (1.3875V) - triggers reset before processor supply violation, ensuring deterministic startup under brownout. |
| Shutdown Current | 0.1µA typical - reduces system standby power to nanoampere level when host MCU disables power rail. |
| Input Voltage Range | +2.5V to +5.5V - compatible with USB VBUS, 3.3V system rails, and boosted battery sources. |
Pinout & Package
MAX6472TA15AD3+ is housed in an 8-pin TDFN-EP package (3mm × 3mm, 0.5mm pitch) with exposed paddle thermally connected to GND. Pin 1 = IN, Pin 2 = GND, Pin 3 = MR, Pin 4 = RESET, Pin 5 = SET, Pin 6 = OUT, Pins 7–8 = NC (no connect), EP = GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator input | Accepts 2.5V–5.5V supply; requires 0.1µF ceramic bypass to GND for stability and noise rejection. |
| 2 (GND) | Power and thermal ground | Primary return path and heatsink; must be soldered to large PCB ground plane for thermal management. |
| 3 (MR) | Active-low manual reset input | Pulls RESET low when asserted; internal 40kΩ pullup to VOUT eliminates external resistor; supports switch or logic-level control. |
| 4 (RESET) | Active-low open-drain reset output | Drives µP reset pin; requires external pullup to VCC; asserts during power-up, brownout, or MR activation. |
| 5 (SET) | Feedback configuration terminal | Grounded internally for fixed 1.5V mode; unused in this variant-no external divider required. |
| 6 (OUT) | Regulated output | Delivers 1.5V @ up to 300mA; requires ≥3.3µF low-ESR ceramic capacitor to GND for transient response and stability. |
| 7–8 (NC) | No-connect terminals | Not bonded; left unconnected per design-no routing or termination needed. |
| EP | Exposed thermal pad | Internally tied to GND; must be soldered to PCB ground plane to achieve specified thermal resistance (θJA = 41°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MR input | Enables hardware-initiated reset without external supervisor IC-reduces BOM count and board area in handheld instruments. |
| 150ms reset timeout | Guarantees µP clock and supply stabilization before release; eliminates need for external RC timing network. |
| 0.1µA shutdown current | Supports ultra-low-power sleep states in battery-backed systems-enables multi-year operation in IoT edge sensors. |
| Reverse OUT-to-IN protection | 0.01µA max leakage prevents backup capacitor or supercap discharge into depleted battery-preserves hold-up time. |
| Thermal shutdown with hysteresis | 180°C trip / 160°C recovery prevents latch-up during sustained overload-enables robust operation in sealed enclosures. |
| ±2.0% output accuracy | Meets tight tolerance requirements for 1.5V I/O and core rails in modern low-voltage MCUs without post-regulation trimming. |
Applications
| Handheld Medical Sensors | USB-Powered Test Equipment |
|---|---|
Use Scenario: Portable blood glucose meter with BLE radio and LCD display operating from single AAA battery. IC Role / Device Role / Timing Role: Primary 1.5V power rail generator and system supervisor-regulates battery output and asserts RESET until stable voltage and clock are established. Use Value: 82µA quiescent current extends battery life beyond 12 months in standby; MR input allows user-triggered recalibration reset. |
Use Scenario: Compact oscilloscope probe interface dongle drawing power exclusively from USB 2.0 port. IC Role / Device Role / Timing Role: Local 1.5V supply for analog front-end ADC and digital logic, with synchronized reset assertion during USB enumeration. Use Value: 114mV dropout ensures regulation even at USB VBUS low limit (4.4V); 150ms RESET timeout meets USB 2.0 suspend/resume timing. |
| Industrial Wireless Sensor Nodes | Bluetooth Audio Accessories |
Use Scenario: Battery-operated vibration monitor deployed in factory machinery with 10-year maintenance cycle. IC Role / Device Role / Timing Role: Power management and fault detection unit-supplies 1.5V to MCU and RF transceiver, monitors supply integrity during motor startup surges. Use Value: -40°C to +85°C rating ensures reliability in uncontrolled environments; thermal shutdown prevents damage during ambient overheating. |
Use Scenario: True wireless stereo earbud charging case with embedded charge controller and status MCU. IC Role / Device Role / Timing Role: Secondary regulated rail for firmware update MCU and LED driver-activated only during case-open event via SHDN control. Use Value: 0.1µA shutdown current minimizes self-discharge; MR input enables factory test mode entry without disassembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76315QDBVRQ1 | 150mA output, no MR input, 300ms reset timeout, automotive-grade (-40°C to +125°C) | Lacks manual reset; suited for automotive infotainment power sequencing where external reset control is unnecessary | Select when AEC-Q100 qualification is mandatory and 150mA suffices; avoid if MR-driven diagnostics or field service reset required |
| ADM6315-29D3ARTZ-RL | Standalone reset IC (no LDO), 2.93V threshold, 200ms timeout, SOT23-3 package | Requires external 1.5V LDO; adds component count but offers independent reset timing and voltage threshold selection | Choose when system already includes a high-efficiency 1.5V DC-DC converter and only supervisor functionality is needed |
Compared with TPS76315QDBVRQ1 and ADM6315-29D3ARTZ-RL, MAX6472TA15AD3+ uniquely combines 300mA 1.5V regulation, MR input, and 150ms reset in a single 3×3mm TDFN-reducing footprint by >40% versus discrete LDO + supervisor solutions while enabling field-serviceable reset capability.
Availability
MAX6472TA15AD3+ is available at Aetrix Electronics and suitable for handheld medical sensors, USB-powered test equipment, industrial wireless sensor nodes, and Bluetooth audio accessories requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6472TA15AD3+ 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 electronics where space, quiescent current, and system-level supervision are critical constraints.
FAQ
What is the function of the MR pin on the MAX6472TA15AD3+?
The MR (Manual Reset) pin on the MAX6472TA15AD3+ is an active-low input that forces the RESET output low when asserted, regardless of VOUT status. It features an internal 40kΩ pullup to VOUT, allowing direct connection to a pushbutton or logic signal. This enables field-service reset, factory test mode entry, or emergency recovery without cycling main power-making MAX6472TA15AD3+ ideal for sealed or inaccessible devices.
Does the MAX6472TA15AD3+ require external components to set its 1.5V output?
No, the MAX6472TA15AD3+ does not require external components to set its 1.5V output. Its SET pin is internally configured for fixed-output operation, and the 1.5V regulation is achieved using factory-trimmed internal feedback resistors. Only input (0.1µF) and output (≥3.3µF) bypass capacitors are mandatory for stable operation-simplifying layout and reducing BOM cost compared to adjustable LDOs.
What is the maximum continuous output current guaranteed for the MAX6472TA15AD3+?
The MAX6472TA15AD3+ guarantees a minimum continuous output current of 300mA across the full operating temperature range (-40°C to +85°C) and input voltage range (2.5V to 5.5V). This rating accounts for worst-case dropout, thermal derating, and process variation-ensuring reliable power delivery to 1.5V microcontrollers, RF transceivers, or sensor signal chains without external current boosting.
How does the MAX6472TA15AD3+ behave when the input voltage falls below the undervoltage lockout threshold?
When VIN drops below the MAX6472TA15AD3+ undervoltage lockout threshold (2.25V min), the regulator shuts down and the RESET output is asserted low. This prevents erratic behavior in downstream circuitry during brownout conditions. RESET remains asserted until VIN rises above 2.47V (typ), VOUT stabilizes above 1.3875V (1.5V × 92.5%), and the 150ms timeout expires-ensuring clean, sequenced power-up of the entire system.
Can the MAX6472TA15AD3+ be used with a backup supercapacitor on the output?
Yes, the MAX6472TA15AD3+ supports backup supercapacitor operation on its OUT pin. When IN is removed, reverse OUT-to-IN leakage is limited to 0.01µA (typ), preserving supercap voltage. The RESET output asserts to signal power loss, enabling the host MCU to enter low-power state and retain volatile data. An external diode between OUT and supercap is optional for non-rechargeable chemistries but unnecessary for rechargeable types.
MAX6472TA15AD3+ 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:
- Manual Reset, 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:
- 8-TDFN (3x3)
MAX6472TA15AD3+ FAQ
1.How can I place an order for MAX6472TA15AD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6472TA15AD3+ 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 MAX6472TA15AD3+ reliable?
The price and inventory of MAX6472TA15AD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6472TA15AD3+ is usually 5 days.
3.What payment methods are accepted for MAX6472TA15AD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6472TA15AD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6472TA15AD3+?
MAX6472TA15AD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6472TA15AD3+ 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 MAX6472TA15AD3+?
For technical support, including MAX6472TA15AD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6472TA15AD3+ requirements.
6.How does Aetrix verify that MAX6472TA15AD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6472TA15AD3+ 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 MAX6472TA15AD3+ meets industry standards.
7.What is the process for return or replacement of MAX6472TA15AD3+?
All MAX6472TA15AD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6472TA15AD3+, 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 MAX6472TA15AD3+ part is unused and in its original packaging.
Return procedure for MAX6472TA15AD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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