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Analog Devices Inc./Maxim Integrated MAX6471TA18BD3+T
- Part No.:
- MAX6471TA18BD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6471TA18BD3+T.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,571
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Product details
Overview
MAX6471TA18BD3+T from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 1.8V output, -12.5% reset threshold, and 150ms minimum reset timeout. It features 82µA quiescent current, 55mV dropout at 150mA, and operates from -40°C to +85°C. Designed for battery-powered portable equipment including Bluetooth modules and digital cameras.
For engineers reviewing the MAX6471TA18BD3+T datasheet, MAX6471TA18BD3+T pinout, MAX6471TA18BD3+T application, or MAX6471TA18BD3+T equivalent, this device delivers verified reset supervision, shutdown control, manual reset input, and thermal/short-circuit protection in an 8-pin TDFN-EP package - critical for space-constrained, low-power embedded systems requiring reliable power sequencing and brownout immunity.
Technical Context
The MAX6471TA18BD3+T integrates a precision LDO regulator core with a fully independent reset supervisor using the same bandgap reference. Its manual reset (MR) input allows external assertion of RESET while VOUT remains within specification, with internal 40kΩ pullup to VOUT and 200ns MR-to-RESET delay.
This variant belongs to the MAX6471–MAX6474/MAX6479–MAX6482 subgroup, confirming active-low MR functionality, push-pull or open-drain RESET output configuration, and absence of remote sense (FB) or shutdown (SHDN) pins - distinguishing it from MAX6469/MAX6470 or MAX6475/MAX6476 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2.0% over -40°C to +85°C - ensures stable core voltage for 1.8V logic and RF ICs. |
| Max Output Current | 300mA guaranteed - sufficient to power microcontrollers, sensors, and wireless transceivers without external boost. |
| Dropout Voltage | 55mV at 150mA load - enables operation down to VIN = 1.855V, extending battery runtime in single-cell Li-ion or alkaline systems. |
| Quiescent Current | 82µA typical - minimizes standby drain in always-on portable devices like Bluetooth modules. |
| Reset Threshold | -12.5% of VOUT (1.575V nominal) - provides conservative brownout detection aligned with µP supply tolerance requirements. |
| Reset Timeout | 150ms minimum - satisfies boot-time stabilization windows for ARM Cortex-M and similar processors. |
| Input Voltage Range | 2.5V to 5.5V - compatible with USB, Li-ion, and multi-cell battery inputs without pre-regulation. |
Pinout & Package
MAX6471TA18BD3+T uses an 8-pin TDFN-EP (3mm × 3mm, 0.5mm pitch) package with exposed paddle thermally connected to GND. Pin 1 is IN; Pin 2 is GND; Pin 3 is MR; Pin 4 is RESET; Pin 5 is SET; Pin 6 is OUT; Pins 7–8 are NC; EP is internally tied to GND and must be soldered to PCB ground plane for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator input | Accepts 2.5V–5.5V supply; requires 0.1µF bypass to GND for stability. |
| 2 (GND) | Ground / thermal pad | Primary return path and heatsink; must connect to large copper area for thermal dissipation. |
| 3 (MR) | Active-low manual reset input | Pulls RESET low when asserted; internal 40kΩ pullup to VOUT eliminates external resistor. |
| 4 (RESET) | Active-low reset output | Push-pull configuration; asserts during power-up, brownout, or MR activation for ≥150ms. |
| 5 (SET) | Feedback reference input | Connected to GND for fixed 1.8V mode; unused in this variant - no external divider required. |
| 6 (OUT) | Regulated output | Delivers 1.8V @ up to 300mA; requires ≥3.3µF low-ESR ceramic capacitor to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated manual reset (MR) | Enables system-level reset initiation without processor involvement - supports field service and test modes. |
| 150ms reset timeout | Guarantees sufficient hold time for clock oscillator stabilization and memory initialization before µP release. |
| 82µA supply current | Reduces battery load by >95% versus legacy supervisors + LDO solutions - extends shelf life in IoT endpoints. |
| Thermal & short-circuit protection | Shuts down pass transistor at 180°C junction temp with 20°C hysteresis - prevents damage during overload or poor layout. |
| Reverse current blocking | 0.01µA typical OUT-to-IN leakage - prevents backup capacitor or battery discharge when main supply is removed. |
Applications
| Bluetooth Module Power Management | Digital Camera Core Supply |
|---|---|
Use Scenario: Powering BLE SoC (e.g., nRF52840) in compact wearable designs with single-cell Li-ion battery. IC Role / Device Role / Timing Role: Provides regulated 1.8V VDDCORE and asserts RESET until VOUT stabilizes post-battery insertion or wake-up. Use Value: Eliminates need for discrete supervisor + LDO, reducing BOM count and PCB area while ensuring reliable boot under varying battery voltage (3.0V–4.2V). |
Use Scenario: Supplying image sensor interface and ISP logic in ultra-thin digital cameras operating from dual AA batteries. IC Role / Device Role / Timing Role: Delivers clean 1.8V rail and monitors brownout during flash discharge events that cause transient VIN sag. Use Value: 150ms reset timeout prevents spurious reboots during brief voltage dips, improving user experience and data integrity. |
| PCMCIA Card Voltage Regulation | Handheld Instrument Microcontroller Supply |
Use Scenario: Regulating 1.8V supply for PCMCIA Wi-Fi card in legacy industrial laptops with variable bus voltage (3.3V ±10%). IC Role / Device Role / Timing Role: Acts as local LDO with MR input tied to card-detect signal to force hardware reset on hot-insertion. Use Value: Manual reset capability ensures deterministic initialization sequence independent of host OS timing. |
Use Scenario: Powering ARM Cortex-M4 MCU in handheld test equipment with alkaline battery pack (2.4V–3.6V). IC Role / Device Role / Timing Role: Supplies stable 1.8V core voltage and asserts RESET if battery drops below 1.575V (−12.5% of 1.8V). Use Value: Tight ±2.0% output accuracy maintains MCU timing margins across temperature, preventing clock-related failures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76318QDBVRQ1 | 300mA LDO with 1.8V fixed output and active-low RESET, but no MR input; 120ms reset timeout; 120µA IQ. | Lacks manual reset capability - unsuitable where field-initiated reset is required. | Select when MR is unnecessary and AEC-Q100 qualification is mandatory (automotive grade). |
| ADP196ACBZ-1.8-R7 | 300mA LDO with 1.8V output and RESET, but no MR or programmable timeout; 100µA IQ; only 100ms timeout. | Cannot meet 150ms minimum timeout requirement; no manual reset support. | Choose for cost-sensitive consumer applications where shorter reset hold time is acceptable. |
Compared with TPS76318QDBVRQ1 and ADP196ACBZ-1.8-R7, MAX6471TA18BD3+T uniquely combines MR input, 150ms timeout, and ultra-low 82µA quiescent current - making it the only option among the three that satisfies simultaneous requirements for field-service reset, extended boot stabilization, and multi-year battery life.
Availability
MAX6471TA18BD3+T is available at Aetrix Electronics and suitable for Bluetooth modules, digital cameras, handheld instruments, and PCMCIA cards requiring stable component supply with full lifecycle support and RoHS-compliant packaging.
Supply support for MAX6471TA18BD3+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
MAX6471TA18BD3+T belongs to the MAX6469–MAX6484 family of integrated LDO regulators with microprocessor reset, designed specifically for battery-powered portable equipment demanding low quiescent current, precise reset thresholds, and compact packaging.
FAQ
What is the exact output voltage and tolerance of MAX6471TA18BD3+T?
The MAX6471TA18BD3+T delivers a fixed 1.8V output with ±2.0% accuracy over the full operating temperature range (-40°C to +85°C), as specified in the Electrical Characteristics table. This tolerance ensures compatibility with 1.8V I/O standards and core supplies for modern microcontrollers and RF ICs without requiring external trimming.
Does MAX6471TA18BD3+T include a manual reset (MR) input, and how is it used?
Yes, MAX6471TA18BD3+T includes an active-low manual reset (MR) input on Pin 3. Pulling MR low asserts the RESET output regardless of VOUT status, and RESET remains active for the full 150ms timeout after MR returns high. The internal 40kΩ pullup to VOUT eliminates external components, enabling simple switch-based reset implementation.
What is the reset timeout period for MAX6471TA18BD3+T, and is it configurable?
The MAX6471TA18BD3+T has a fixed 150ms minimum reset timeout period, indicated by the 'D3' suffix in the part number. This value is factory-programmed and not user-configurable; it meets common microprocessor boot stabilization requirements and cannot be adjusted via external components or pins.
What package type and thermal characteristics does MAX6471TA18BD3+T use?
MAX6471TA18BD3+T uses an 8-pin TDFN-EP package (3mm × 3mm, 0.5mm pitch) with exposed paddle. Its thermal resistance θJA is 24.4°C/W, supporting up to 1951mW continuous power dissipation at +70°C ambient. The EP must be soldered to PCB ground for effective heat transfer and reliability.
How does MAX6471TA18BD3+T handle reverse current flow when the input supply is disconnected?
MAX6471TA18BD3+T blocks reverse current from OUT to IN with only 0.01µA typical leakage, preventing backup capacitors or secondary batteries from discharging into a removed primary source. This behavior is enabled by internal circuitry that disables the pass transistor when VOUT > VIN, preserving energy in battery-backed systems.
MAX6471TA18BD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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 (1.8V)
- 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)
MAX6471TA18BD3+T FAQ
1.How can I place an order for MAX6471TA18BD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6471TA18BD3+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 MAX6471TA18BD3+T reliable?
The price and inventory of MAX6471TA18BD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6471TA18BD3+T is usually 5 days.
3.What payment methods are accepted for MAX6471TA18BD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6471TA18BD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6471TA18BD3+T?
MAX6471TA18BD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6471TA18BD3+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 MAX6471TA18BD3+T?
For technical support, including MAX6471TA18BD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6471TA18BD3+T requirements.
6.How does Aetrix verify that MAX6471TA18BD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6471TA18BD3+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 MAX6471TA18BD3+T meets industry standards.
7.What is the process for return or replacement of MAX6471TA18BD3+T?
All MAX6471TA18BD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6471TA18BD3+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 MAX6471TA18BD3+T part is unused and in its original packaging.
Return procedure for MAX6471TA18BD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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