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Analog Devices Inc./Maxim Integrated MAX6471TA33BD3+T
- Part No.:
- MAX6471TA33BD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6471TA33BD3+T.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,593
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Product details
Overview
MAX6471TA33BD3+T from Maxim Integrated is a 300mA, 3.3V fixed-output low-dropout linear regulator with integrated microprocessor reset circuit, ±2.0% output accuracy over -40°C to +85°C, 114mV dropout at 300mA load, and 2.5ms–1200ms selectable reset timeout. It features active-low manual reset (MR) input and operates from 2.5V to 5.5V input, targeting battery-powered portable systems requiring reliable power sequencing and brownout protection.
For engineers reviewing the MAX6471TA33BD3+T datasheet, MAX6471TA33BD3+T pinout, MAX6471TA33BD3+T application, or MAX6471TA33BD3+T equivalent, this page delivers verified technical context, exact pin functions for SOT23-6 package, confirmed reset threshold behavior (-7.5% or -12.5% of VOUT), shutdown current (0.1µA typ), and real-world design implications for handheld instruments, USB devices, and Bluetooth modules.
Technical Context
The MAX6471TA33BD3+T integrates a precision LDO regulator core and a fully independent reset supervisor sharing the same reference. Its MR input asserts RESET while pulled low-even when VOUT remains within specification-and sustains assertion for the full D3 timeout (150ms min) after MR release. The device uses internal pullup (40kΩ typ) from MR to VOUT, enabling direct switch-to-ground implementation without external components.
Regulator operation is enabled by default (SHDN not present on MAX6471 series); output voltage is fixed at 3.3V via internal resistor divider, with SET pin grounded. Dropout is guaranteed ≤114mV at 300mA, and supply current remains stable at 82µA (typ) across input range-critical for long-life battery applications where quiescent power dominates energy budget.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2.0% over -40°C to +85°C - ensures stable µP core rail without external feedback tuning. |
| Max Output Current | 300mA guaranteed - supports moderate-power SoCs and peripheral ICs in portable designs. |
| Dropout Voltage | 114mV at 300mA - enables operation down to VIN = 3.414V, extending usable battery voltage range. |
| Supply Current | 82µA typical - minimizes standby drain in always-on subsystems like RTC or sensor wake logic. |
| Reset Timeout | 150ms minimum (D3 suffix) - satisfies boot timing requirements for ARM Cortex-M and similar processors. |
| Reset Threshold | -7.5% or -12.5% of VOUT (B or A suffix) - matches standard µP supply tolerance bands for deterministic reset assertion. |
| Shutdown Current | Not applicable - MAX6471 lacks SHDN pin; always-on operation simplifies control logic but excludes deep-sleep mode. |
Pinout & Package
MAX6471TA33BD3+T is packaged in 6-pin SOT23 (lead-free, RoHS-compliant), with thermal pad connected internally to GND. Pin 2 (GND) serves dual role as electrical ground and primary thermal path-must be soldered to large PCB copper area for reliable 300mA operation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN | Regulator input (2.5V–5.5V); bypass to GND with 0.1µF ceramic capacitor to suppress high-frequency noise. |
| 2 | GND | Power and thermal ground; connects internally to exposed paddle in TDFN variants-requires solid PCB thermal connection. |
| 3 | MR | Active-low manual reset input; internal 40kΩ pullup to VOUT enables pushbutton reset without external resistor. |
| 4 | RESET | Active-low open-drain reset output; sinks ≥3.2mA at 0.4V - directly interfaces with µP reset pin or logic-level inputs. |
| 5 | SET | Feedback node; grounded for 3.3V fixed output; left unconnected or tied to GND per datasheet-no external divider required. |
| 6 | OUT | Regulated 3.3V output; requires ≥3.3µF low-ESR ceramic capacitor at pin for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Manual Reset (MR) | Asserts RESET on demand while VOUT is in spec-enables field service, firmware recovery, and test-mode entry without power cycle. |
| 150ms Minimum Reset Timeout (D3) | Guarantees sufficient hold time for processor initialization and clock stabilization before release-eliminates need for external RC timing. |
| ±2.0% Output Accuracy Over Temp | Maintains µP core voltage within JEDEC JESD8-12A compliance across industrial temperature range-reduces margining overhead. |
| 82µA Quiescent Current | Enables >1-year battery life in coin-cell-powered IoT sensors with 10µA average system sleep current. |
| Reverse Current Protection | 0.01µA OUT→IN leakage prevents backup capacitor or supercap discharge into depleted main battery-extends runtime during swap. |
Applications
| Handheld Instruments | PCMCIA/USB Devices |
|---|---|
Use Scenario: Power management in battery-operated digital multimeters and spectrum analyzers with real-time display and data logging. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying microcontroller, ADC, and LCD driver; MR pin used for user-initiated calibration reset. Use Value: 114mV dropout extends usable alkaline battery life by 18% vs. legacy 200mV-drop regulators; 150ms reset ensures clean boot after button press. |
Use Scenario: Compact USB audio interface with FPGA-based sample rate converter and analog I/O. IC Role / Device Role / Timing Role: Dedicated 3.3V rail for USB PHY and FPGA configuration logic; RESET output synchronized to VBUS presence detection. Use Value: 82µA quiescent current reduces standby drain below USB suspend limit (500µA); MR input allows host-triggered firmware reload via GPIO. |
| Cellular Telephones | Bluetooth Modules |
Use Scenario: Powering baseband processor and RF transceiver in feature phones with removable Li-ion battery. IC Role / Device Role / Timing Role: Main 3.3V supply with brownout detection; RESET asserted during battery insertion/removal to prevent undefined state. Use Value: -7.5% reset threshold (B suffix) matches GSM baseband IC requirements; 150ms timeout exceeds 3GPP power-up sequence minimum. |
Use Scenario: Low-energy BLE module in medical wearables with motion-triggered wake and sensor fusion. IC Role / Device Role / Timing Role: Regulator for BLE SoC and MEMS accelerometer; MR pin driven by MCU GPIO to force stack reinitialization after OTA update. Use Value: No SHDN pin simplifies control logic; 0.01µA reverse leakage preserves supercap charge during battery replacement-enabling zero-downtime maintenance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76333DBVR | 300mA LDO only-no integrated reset or MR input; requires external supervisor (e.g., TPS3809) for reset functionality. | Lacks manual reset capability and programmable timeout-unsuitable for field-serviceable devices requiring user-initiated reset. | Select when cost sensitivity outweighs integration benefits and board space permits discrete supervisor placement. |
| MAX6472TA33BD3+T | Identical specs except SHDN pin replaces MR pin-supports active-low shutdown instead of manual reset. | Used in always-on monitoring systems where power gating is prioritized over user reset; incompatible with MR-driven firmware recovery flows. | Choose only if system architecture mandates shutdown control and MR functionality is unused-pinout differs (SHDN vs MR on Pin 3). |
Compared with TPS76333DBVR, MAX6471TA33BD3+T eliminates BOM count and layout complexity by integrating reset supervision, while MAX6472TA33BD3+T trades MR for SHDN-making it functionally distinct despite identical output and dropout specs.
Availability
MAX6471TA33BD3+T is available at Aetrix Electronics and suitable for handheld instruments, PCMCIA/USB devices, and Bluetooth modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6471TA33BD3+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 and mixed-signal ICs for power management, sensing, and connectivity in demanding environments.
The MAX6469–MAX6484 family was engineered specifically for battery-powered portable electronics needing ultra-low IQ, integrated reset supervision, and robust fault protection-targeting PDA, telecom, and wireless infrastructure markets.
FAQ
What is the reset timeout duration for MAX6471TA33BD3+T?
The "D3" suffix in MAX6471TA33BD3+T specifies a minimum reset timeout period of 150ms. This value is guaranteed across -40°C to +85°C and ensures sufficient hold time for microprocessor initialization before deassertion. The timeout begins when VOUT rises above the selected reset threshold (e.g., -7.5% of 3.3V = 3.07V) and continues for the full 150ms interval regardless of subsequent voltage fluctuations.
Does MAX6471TA33BD3+T support adjustable output voltage?
No, MAX6471TA33BD3+T is configured for fixed 3.3V output. Its SET pin must be connected to GND to enable preset operation. While the MAX6471 series supports adjustable mode via external resistors on SET, the TA33 suffix explicitly denotes 3.3V factory-trimmed output-no resistor network is required or recommended for this variant.
What is the function of the MR pin on MAX6471TA33BD3+T?
The MR (Manual Reset) pin on MAX6471TA33BD3+T is an active-low input that forces the RESET output low when asserted-even if VOUT remains within regulation. It features an internal 40kΩ pullup to VOUT, allowing direct connection of a momentary switch to GND for user-initiated reset. MR assertion holds RESET for the full D3 timeout (150ms min) after release, ensuring deterministic processor restart.
What package type does MAX6471TA33BD3+T use?
MAX6471TA33BD3+T is supplied in a lead-free, RoHS-compliant 6-pin SOT23 package (SOT23-6). Pin 2 (GND) serves as both electrical ground and thermal conduction path-designers must connect it to a large PCB copper pour to maintain junction temperature within limits at 300mA load.
Is shutdown functionality available on MAX6471TA33BD3+T?
No, MAX6471TA33BD3+T does not include a shutdown (SHDN) pin. It belongs to the MAX6471–MAX6474 subfamily, which replaces SHDN with MR functionality. For shutdown capability, consider MAX6472TA33BD3+T (same output and timeout, but SHDN on Pin 3 instead of MR) or MAX6469TA33BD3+T (SHDN-enabled variant in same family).
MAX6471TA33BD3+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 (3.3V)
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- 0.18V @ 300mA
- 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)
MAX6471TA33BD3+T FAQ
1.How can I place an order for MAX6471TA33BD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6471TA33BD3+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 MAX6471TA33BD3+T reliable?
The price and inventory of MAX6471TA33BD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6471TA33BD3+T is usually 5 days.
3.What payment methods are accepted for MAX6471TA33BD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6471TA33BD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6471TA33BD3+T?
MAX6471TA33BD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6471TA33BD3+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 MAX6471TA33BD3+T?
For technical support, including MAX6471TA33BD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6471TA33BD3+T requirements.
6.How does Aetrix verify that MAX6471TA33BD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6471TA33BD3+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 MAX6471TA33BD3+T meets industry standards.
7.What is the process for return or replacement of MAX6471TA33BD3+T?
All MAX6471TA33BD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6471TA33BD3+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 MAX6471TA33BD3+T part is unused and in its original packaging.
Return procedure for MAX6471TA33BD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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