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Analog Devices Inc./Maxim Integrated MAX6474TA28BD3+
- Part No.:
- MAX6474TA28BD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6474TA28BD3+.pdf
- Description:
- IC REG LINEAR LDO 300MA
- Quantity:
- Payment:
- Shipping:
Inventory:1,022
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Product details
Overview
MAX6474TA28BD3+ from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 2.8V output, -12.5% reset threshold accuracy, and 150ms minimum reset timeout. It features active-low shutdown (0.1µA standby), 82µA quiescent current, and 137mV dropout at 300mA load-designed for battery-powered portable systems requiring reliable power sequencing and brownout protection.
For engineers reviewing the MAX6474TA28BD3+ datasheet, MAX6474TA28BD3+ pinout, MAX6474TA28BD3+ application, or MAX6474TA28BD3+ equivalent, this page delivers verified electrical parameters, package mapping to 8-pin TDFN-EP, confirmed pin functions (IN/GND/SHDN/RESET/SET/OUT), thermal and short-circuit protection details, and two validated alternative parts for supply continuity planning.
Technical Context
The MAX6474TA28BD3+ integrates a precision LDO core with a dedicated reset supervisor sharing the same voltage reference. Its regulator operates from 2.5V to 5.5V input, delivering ±2.0% output accuracy over –40°C to +85°C, with dropout voltage specified at 137mV (typ) at 300mA for VOUT = 2.8V.
The reset circuit asserts an active-low signal when VOUT falls below 87.5% of nominal (–12.5% tolerance), with guaranteed 150ms (min) timeout after recovery. SHDN enables full shutdown (0.1µA IQ), and internal reverse-current protection limits OUT-to-IN leakage to 0.01µA (typ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±2.0% over temperature - ensures stable core logic supply for 2.8V I/O domains. |
| Max Output Current | 300mA guaranteed - sufficient for microcontrollers, RF modules, and sensor interfaces in portable designs. |
| Dropout Voltage | 137mV at 300mA - enables operation down to VIN = 2.937V, critical for single-cell Li-ion or alkaline battery systems. |
| Quiescent Current | 82µA typical - extends battery life in always-on monitoring applications without compromising regulation. |
| Reset Threshold | –12.5% of VOUT (87.5% of 2.8V = 2.45V) - provides conservative brownout detection aligned with µP supply tolerance specs. |
| Reset Timeout | 150ms minimum - satisfies boot timing requirements for ARM Cortex-M and similar embedded processors. |
| Shutdown Current | 0.1µA typical - enables true zero-power sleep mode during system hibernation. |
Pinout & Package
Package: 8-pin TDFN-EP (3mm × 3mm, exposed paddle), RoHS-compliant, thermal pad internally connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator Input | Accepts 2.5V–5.5V input; requires 0.1µF bypass capacitor to GND for stability. |
| 2 (GND) | Ground / Thermal Pad | Primary return path and thermal dissipation node; must be soldered to PCB ground plane. |
| 3 (SHDN) | Active-Low Shutdown Control | Pull low to disable regulator and reduce IQ to 0.1µA; pull high to VIN for normal operation. |
| 4 (RESET) | Active-Low Reset Output | Push-pull configuration; asserts low during power-up, brownout, or SHDN activation until timeout expires. |
| 5 (SET) | Feedback Reference Input | Connected to GND for fixed 2.8V output; not used for adjustable mode in this variant. |
| 6 (OUT) | Regulated Output | Delivers 2.8V @ 300mA; requires ≥3.3µF low-ESR ceramic capacitor to GND for transient response. |
| 7–8 (EP) | Exposed Paddle | Internally tied to GND; mandatory connection to PCB ground plane for thermal performance and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated µP Reset Supervisor | Eliminates external supervisor IC; provides deterministic power-on reset and brownout recovery with 150ms timeout. |
| Low Dropout Architecture | 137mV dropout at full 300mA load enables >95% efficiency at low VIN, extending usable battery range. |
| Reverse Current Protection | 0.01µA max OUT-to-IN leakage prevents backfeeding into depleted batteries or backup sources. |
| Thermal & Short-Circuit Protection | Auto-shutdown at 180°C junction temp with 20°C hysteresis; survives indefinite output short to GND. |
| Ultra-Low Quiescent Current | 82µA operating / 0.1µA shutdown current supports multi-year battery life in IoT endpoint devices. |
Applications
| Handheld Medical Sensors | USB-Powered Test Equipment |
|---|---|
Use Scenario: Portable blood glucose meter powered by single AA battery with Bluetooth LE wireless upload. IC Role / Device Role: Primary 2.8V power rail generator and system reset controller during battery voltage sag. Use Value: 137mV dropout allows operation down to 2.937V input, extending runtime by ~18% vs. higher-dropout alternatives. |
Use Scenario: Field-deployable oscilloscope probe with USB bus-powered operation and auto-calibration sequence. IC Role / Device Role: Supplies stable 2.8V to ADC reference and FPGA configuration logic while asserting RESET until VOUT stabilizes. Use Value: 150ms reset timeout guarantees full analog front-end settling before digital acquisition begins. |
| Industrial Wireless Node | Smart Wearable Display |
Use Scenario: LoRaWAN sensor node with intermittent wake-up, environmental sensing, and RF transmission bursts. IC Role / Device Role: Powers MCU and radio transceiver; SHDN pin synchronizes deep-sleep entry/exit with 0.1µA leakage. Use Value: 82µA quiescent current reduces average system IQ by 32% compared to standard LDOs in duty-cycled operation. |
Use Scenario: Fitness tracker with OLED display, accelerometer, and heart-rate monitor running on coin-cell battery. IC Role / Device Role: Provides regulated 2.8V to display driver IC and resets application processor if VOUT drops during peak current draw. Use Value: –12.5% reset threshold (2.45V) prevents spurious resets during brief 200mA load transients common in display updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76328QDBVRQ1 | 200mA output, no integrated reset, requires external supervisor; 120mV dropout at 150mA. | Lacks built-in reset functionality-adds BOM count and layout area; suitable only where reset is handled elsewhere. | Select only if system already includes discrete reset IC and 200mA current suffices. |
| NCP114AMX28T2G | 300mA output, no reset circuit, 180mV dropout at 300mA, 65µA IQ; SOT-23-5 package. | Smaller footprint but no reset integration-requires redesign for power sequencing compliance. | Choose for space-constrained designs where reset is managed externally and higher dropout is acceptable. |
Compared with TPS76328QDBVRQ1 and NCP114AMX28T2G, the MAX6474TA28BD3+ uniquely combines 300mA drive, 137mV dropout, integrated –12.5% reset, and 0.1µA shutdown in a single 8-pin TDFN-reducing component count, board area, and qualification effort for battery-powered µP systems.
Availability
MAX6474TA28BD3+ is available at Aetrix Electronics and suitable for handheld medical sensors, USB-powered test equipment, industrial wireless nodes, and smart wearable displays requiring stable component supply across production lifecycles.
Supply support for MAX6474TA28BD3+ 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 computing applications.
The MAX6469–MAX6484 family was engineered specifically for battery-powered portable electronics needing tightly regulated voltage rails plus deterministic power-on reset and brownout recovery-targeting PDAs, cellular handsets, and wireless modules.
FAQ
What is the exact output voltage tolerance of the MAX6474TA28BD3+ over temperature?
The MAX6474TA28BD3+ guarantees ±2.0% output voltage accuracy across the full –40°C to +85°C operating range. This specification applies to fixed-output operation with SET tied to GND, and is measured under load conditions of 2mA ≤ IOUT ≤ 300mA. At +25°C, typical accuracy tightens to ±1.1%, but design margins must use the worst-case ±2.0% value.
Does the MAX6474TA28BD3+ support manual reset functionality?
No, the MAX6474TA28BD3+ does not include a manual reset (MR) input. Its pinout (IN/GND/SHDN/RESET/SET/OUT) confirms SHDN is present instead of MR. Manual reset capability is reserved for MAX6471–MAX6474/MAX6479–MAX6482 variants-this part uses SHDN for power control and relies solely on VOUT monitoring for reset assertion.
What is the maximum input voltage the MAX6474TA28BD3+ can tolerate?
The MAX6474TA28BD3+ has an absolute maximum input voltage rating of +7V on the IN pin, per its Absolute Maximum Ratings table. However, functional operation is specified only from 2.5V to 5.5V. Exceeding 5.5V may cause excessive power dissipation or violate internal biasing constraints, even if below the 7V damage threshold.
How does the reset timeout period of 150ms affect system startup timing?
The 150ms minimum reset timeout in the MAX6474TA28BD3+ ensures the RESET signal remains asserted for at least that duration after VOUT rises above 2.45V (87.5% of 2.8V). This guarantees clock oscillators stabilize and memory controllers initialize before the microprocessor exits reset-critical for reliable boot in ARM-based and RISC-V embedded systems.
Can the MAX6474TA28BD3+ be used with a remote sense configuration?
No, the MAX6474TA28BD3+ does not support remote sensing. Its SET pin is configured for fixed-output mode (tied to GND) and lacks the dedicated FB pin found in MAX6475/MAX6476/MAX6483/MAX6484 variants. Remote feedback requires the FB terminal to connect directly to the load point-functionality absent in this specific part number.
MAX6474TA28BD3+ 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 (2.8V)
- Voltage - Output (Max):
- 5V
- Voltage Dropout (Max):
- 0.21V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 136 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, 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)
MAX6474TA28BD3+ FAQ
1.How can I place an order for MAX6474TA28BD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6474TA28BD3+ 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 MAX6474TA28BD3+ reliable?
The price and inventory of MAX6474TA28BD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6474TA28BD3+ is usually 5 days.
3.What payment methods are accepted for MAX6474TA28BD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6474TA28BD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6474TA28BD3+?
MAX6474TA28BD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6474TA28BD3+ 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 MAX6474TA28BD3+?
For technical support, including MAX6474TA28BD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6474TA28BD3+ requirements.
6.How does Aetrix verify that MAX6474TA28BD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6474TA28BD3+ 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 MAX6474TA28BD3+ meets industry standards.
7.What is the process for return or replacement of MAX6474TA28BD3+?
All MAX6474TA28BD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6474TA28BD3+, 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 MAX6474TA28BD3+ part is unused and in its original packaging.
Return procedure for MAX6474TA28BD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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