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Analog Devices Inc./Maxim Integrated MAX6474TA30AD3+
- Part No.:
- MAX6474TA30AD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6474TA30AD3+.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,336
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Product details
Overview
MAX6474TA30AD3+ from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 3.0V output, -12.5% reset threshold, 150ms minimum reset timeout, active-low manual reset input (MR), and 8-pin TDFN-EP package. It delivers ±2.0% output accuracy over -40°C to +85°C and consumes only 82µA quiescent current, making it ideal for battery-powered portable electronics requiring reliable power sequencing and brownout protection.
For engineers reviewing the MAX6474TA30AD3+ datasheet, MAX6474TA30AD3+ pinout, MAX6474TA30AD3+ application, or MAX6474TA30AD3+ equivalent, key selection considerations include its dual-function MR input, guaranteed 300mA output under dropout conditions, 114mV dropout at full load, integrated thermal/short-circuit protection, and compatibility with compact PCB layouts due to its exposed-pad TDFN package.
Technical Context
The MAX6474TA30AD3+ implements a precision bandgap-referenced LDO core with internal feedback resistors set for 3.0V output and a dedicated reset supervisor that shares the same reference, ensuring coordinated voltage monitoring. Its MR pin provides TTL/CMOS-compatible manual reset assertion while VOUT remains in specification, with internal 40kΩ pullup to VOUT and 200ns MR-to-RESET delay.
This device belongs to the MAX6471–MAX6474/MAX6479–MAX6482 variant group featuring manual reset input and shutdown control, and uses an active-low push-pull RESET output with 150ms timeout - selected via the D3 suffix per Maxim's Reset Timeout Delay Guide. It operates across 2.5V–5.5V input range and guarantees stable regulation down to 55mV dropout at 150mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V ±2.0% over -40°C to +85°C - ensures stable core logic supply for microcontrollers without external resistor network. |
| Max Output Current | 300mA guaranteed - supports moderate-power peripherals like Bluetooth modules or USB PHYs without derating. |
| Dropout Voltage | 114mV at 300mA load - enables operation from single-cell Li-ion (3.0V min) or triple-alkaline (4.5V) sources with margin. |
| Quiescent Current | 82µA typical - extends battery life in always-on portable instrumentation with infrequent wake cycles. |
| Reset Threshold | -12.5% of VOUT (2.625V) - asserts RESET before microprocessor supply tolerance violation, preventing erratic execution. |
| Reset Timeout | 150ms minimum - satisfies boot-time requirements for ARM Cortex-M and similar embedded processors. |
| Shutdown Current | 0.1µA typical - reduces system standby power to nanoampere level when host controller disables regulator. |
| Input Voltage Range | 2.5V to 5.5V - compatible with common battery chemistries and intermediate rail supplies in multi-rail systems. |
Pinout & Package
MAX6474TA30AD3+ is housed in an 8-pin TDFN-EP (3mm × 3mm, 0.5mm pitch) package with exposed thermal pad (EP) internally connected to GND. The EP must be soldered to a PCB ground plane for optimal thermal performance and EMI suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator Input | Accepts 2.5V–5.5V input; requires 0.1µF ceramic bypass capacitor to GND for stability. |
| 2 (GND) | Ground / Thermal Pad Anchor | Primary return path and thermal conduction interface; must connect to large copper area or internal ground plane. |
| 3 (SHDN) | Active-Low Shutdown Control | Pulled high to VIN for normal operation; pulling low disables regulator and reduces supply current to 0.1µA. |
| 4 (RESET) | Active-Low Push-Pull Reset Output | Drives µP reset pin directly; remains low for ≥150ms after VOUT rises above 2.625V or MR releases. |
| 5 (MR) | Active-Low Manual Reset Input | Asserts RESET when pulled low; internal 40kΩ pullup to VOUT eliminates need for external resistor. |
| 6 (OUT) | Regulated Output | Delivers 3.0V @ up to 300mA; requires ≥3.3µF low-ESR ceramic output capacitor for transient response. |
| 7,8 (NC) | No Connect | Not bonded; left unconnected per Maxim design - no routing or termination required. |
| EP | Exposed Thermal Pad | Internally tied to GND; must be soldered to PCB ground plane to achieve specified thermal resistance (24.4°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Manual Reset Input (MR) | Enables hardware-initiated system reset without external supervisor IC - reduces BOM count and board space. |
| 150ms Minimum Reset Timeout | Guarantees sufficient hold time for processor clock stabilization and memory initialization before release. |
| Low Dropout at Full Load | 114mV dropout at 300mA allows use with marginal input rails (e.g., 3.114V min) while maintaining regulation. |
| Thermal & Short-Circuit Protection | Shuts down at 180°C junction temperature with 20°C hysteresis - prevents damage during sustained overload. |
| Reverse Output-to-Input Leakage | 0.01µA typ - blocks backfeed from backup capacitors or secondary supplies into main battery source. |
| Push-Pull RESET Output | Eliminates need for external pullup resistor - simplifies µP interface and improves noise immunity vs open-drain. |
Applications
| Handheld Medical Instruments | USB-C Power Delivery Accessories |
|---|---|
Use Scenario: Portable blood glucose meters and pulse oximeters powered by coin-cell or single Li-ion batteries requiring precise 3.0V analog front-end and digital logic supply. IC Role / Device Role / Timing Role: Primary 3.0V power regulator with integrated reset supervision - ensures clean boot and brownout recovery during battery voltage sag. Use Value: 82µA quiescent current extends shelf life; ±2.0% output accuracy maintains ADC reference integrity; MR pin enables user-triggered self-test reset. |
Use Scenario: USB-C PD sink adapters with embedded MCU managing CC logic, VCONN switching, and status LEDs. IC Role / Device Role / Timing Role: Dedicated 3.0V rail for MCU core and USB transceiver - RESET output synchronizes firmware initialization with VBUS presence detection. Use Value: 150ms reset timeout meets USB PD specification timing for state machine startup; TDFN package fits tight 12mm × 12mm adapter PCBs. |
| Industrial Wireless Sensor Nodes | Bluetooth Audio Transceivers |
Use Scenario: Battery-operated LoRaWAN or NB-IoT sensors deployed in remote locations with 10+ year lifetime targets. IC Role / Device Role / Timing Role: Main power regulator with shutdown and manual reset - SHDN enables deep-sleep mode; MR supports field-service firmware recovery. Use Value: 0.1µA shutdown current minimizes leakage in sleep states; thermal protection prevents failure in enclosed enclosures; -40°C to +85°C rating ensures outdoor reliability. |
Use Scenario: True wireless stereo (TWS) earbud charging cases with embedded battery management and LED indicators. IC Role / Device Role / Timing Role: Secondary 3.0V supply for case MCU and status display - RESET output coordinates charge-status reporting after power-up. Use Value: Push-pull RESET drives LED driver directly; 114mV dropout enables operation from partially discharged 3.6V LiPo; MR pin supports factory test mode activation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6474TA30AD2+ | Same 3.0V output and MR function, but 20ms reset timeout (D2 suffix) instead of 150ms. | Suitable for fast-boot MCUs where extended reset hold time is unnecessary. | Select when system boot sequence completes in <25ms and shorter reset duration reduces power-on latency. |
| TPS76330QDBVRQ1 | Automotive-grade 3.0V LDO (±2% accuracy) with 120ms reset timeout, but no MR input or shutdown pin. | Designed for AEC-Q100 automotive applications; lacks manual reset and programmable shutdown. | Choose for automotive infotainment or ADAS modules requiring qualification, but add external reset supervisor if MR needed. |
Compared with MAX6474TA30AD2+, the MAX6474TA30AD3+ provides longer reset hold time for complex firmware initialization; compared with TPS76330QDBVRQ1, it offers system-level flexibility via MR and SHDN pins at the cost of non-automotive qualification.
Availability
MAX6474TA30AD3+ is available at Aetrix Electronics and suitable for handheld medical instruments, USB-C power delivery accessories, industrial wireless sensor nodes, and Bluetooth audio transceivers requiring stable component supply and long-term production continuity.
Supply support for MAX6474TA30AD3+ 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, communications, and consumer applications.
The MAX6469–MAX6484 product line was engineered specifically for battery-powered portable equipment needing integrated power regulation and microprocessor supervision in minimal footprint - targeting PDA, cellular, and wireless module designers.
FAQ
What is the exact reset threshold voltage for MAX6474TA30AD3+?
The MAX6474TA30AD3+ features a -12.5% reset threshold relative to its nominal 3.0V output, resulting in a trip point of 2.625V. This threshold is guaranteed over temperature and ensures RESET asserts before the regulated output violates standard microprocessor supply tolerances. The MAX6474TA30AD3+ uses the 'B' suffix for reset threshold accuracy, confirming ±2.5% tolerance around this 2.625V point.
Does MAX6474TA30AD3+ support adjustable output voltage?
No, the MAX6474TA30AD3+ does not support adjustable output voltage. It belongs to the MAX6473–MAX6474/MAX6481–MAX6482 variant group, which uses fixed internal feedback resistors for preset outputs. The '30' in the part number explicitly denotes a 3.0V fixed output, and the SET pin is not functional for voltage adjustment in this configuration - it must be tied to GND per datasheet guidance.
What package type and thermal characteristics apply to MAX6474TA30AD3+?
The MAX6474TA30AD3+ uses an 8-pin TDFN-EP package (3mm × 3mm, 0.5mm pitch) with exposed thermal pad. Its thermal resistance is 24.4°C/W (junction-to-board), enabling 1951mW maximum power dissipation at +70°C ambient. The EP pad must be soldered to a PCB ground plane to achieve rated thermal performance and ensure reliable operation at full 300mA load.
How does the manual reset (MR) pin behave on MAX6474TA30AD3+?
The MR pin on MAX6474TA30AD3+ is an active-low input with internal 40kΩ pullup to VOUT. Pulling MR low asserts RESET immediately, even if VOUT is within specification, and RESET remains asserted for the full 150ms timeout after MR returns high. This enables field-service reset, factory test modes, or watchdog-triggered recovery without requiring external components.
Is MAX6474TA30AD3+ RoHS-compliant and lead-free?
Yes, MAX6474TA30AD3+ is RoHS-compliant and lead-free. The '+' suffix in the part number explicitly indicates the lead(Pb)-free/RoHS-compliant version per Maxim's ordering guide. It uses matte-tin plating and conforms to JEDEC J-STD-020D reflow profile requirements, with peak solder temperature rated at +260°C for lead-free processes.
MAX6474TA30AD3+ 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 (3V)
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- 0.19V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 136 µA
- Current - Supply (Max):
- 96 µA
- PSRR:
- -
- Control Features:
- Manual Reset, 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)
MAX6474TA30AD3+ FAQ
1.How can I place an order for MAX6474TA30AD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6474TA30AD3+ 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 MAX6474TA30AD3+ reliable?
The price and inventory of MAX6474TA30AD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6474TA30AD3+ is usually 5 days.
3.What payment methods are accepted for MAX6474TA30AD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6474TA30AD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6474TA30AD3+?
MAX6474TA30AD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6474TA30AD3+ 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 MAX6474TA30AD3+?
For technical support, including MAX6474TA30AD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6474TA30AD3+ requirements.
6.How does Aetrix verify that MAX6474TA30AD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6474TA30AD3+ 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 MAX6474TA30AD3+ meets industry standards.
7.What is the process for return or replacement of MAX6474TA30AD3+?
All MAX6474TA30AD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6474TA30AD3+, 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 MAX6474TA30AD3+ part is unused and in its original packaging.
Return procedure for MAX6474TA30AD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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