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Analog Devices Inc./Maxim Integrated MAX6471UT30BD4
- Part No.:
- MAX6471UT30BD4
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX6471UT30BD4.pdf
- Description:
- IC REG LINEAR LDO WITH MPU RESET
- Quantity:
- Payment:
- Shipping:
Inventory:3,032
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Product details
Overview
The MAX6471UT30BD4 from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 3.0V output, -12.5% reset threshold accuracy, and 1200ms (min) reset timeout. It delivers ±2.0% output voltage accuracy over -40°C to +85°C, features 82µA quiescent current, and supports manual reset input (MR) for system-level reset initiation while output remains in specification. It is designed for battery-powered portable equipment requiring reliable power sequencing and brownout protection.
For engineers reviewing the MAX6471UT30BD4 datasheet, MAX6471UT30BD4 pinout, MAX6471UT30BD4 application, or MAX6471UT30BD4 equivalent, key selection criteria include its MR-enabled reset assertion under valid VOUT, 1200ms reset timeout guarantee, 3.0V fixed output with ±2.0% tolerance, and compatibility with handheld instruments, Bluetooth modules, and notebook computers where supply stability and supervisor integration are critical.
Technical Context
The MAX6471UT30BD4 implements a dual-path supervision architecture: the reset circuit monitors VOUT against a -12.5% threshold relative to nominal 3.0V output and asserts active-low RESET for ≥1200ms after recovery. Its manual reset input (MR) is internally pulled up to VOUT via 40kΩ and accepts TTL/CMOS logic levels, enabling external reset initiation without affecting regulation.
This device belongs to the MAX6469–MAX6484 family with shared LDO core topology-featuring a PMOS pass transistor, internal 1.229V SET reference, reverse current protection (<0.01µA OUT→IN), and thermal shutdown at +180°C with 20°C hysteresis. It operates across 2.5V–5.5V input range and guarantees 300mA output current with dropout as low as 114mV at full load.
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 microprocessors in portable systems. |
| Reset Threshold Accuracy | -12.5% of VOUT (2.625V) - triggers reset before microprocessor supply violation, meeting strict brownout detection requirements. |
| Reset Timeout Period | 1200ms minimum - provides sufficient hold-off time for clock stabilization and firmware initialization in embedded systems. |
| Quiescent Current | 82µA typical - enables multi-week battery life in always-on monitoring applications such as wireless sensors. |
| Dropout Voltage | 114mV at 300mA load - allows operation down to VIN = 3.114V, supporting single-cell Li-ion or triple-alkaline battery inputs. |
| Manual Reset Input | MR pin with 40kΩ internal pullup to VOUT - eliminates need for external pullup resistor and supports direct switch-to-GND or logic-driven reset. |
| Shutdown Current | 0.1µA typical - reduces system standby power to negligible levels during deep sleep modes. |
Pinout & Package
MAX6471UT30BD4 is housed in a 6-pin SOT23 package (JEDEC MO-178AA), with exposed paddle thermally connected to GND. Pin 1 is IN, Pin 2 is GND, Pin 3 is SHDN, Pin 4 is RESET, Pin 5 is MR, and Pin 6 is OUT. The exposed paddle must be soldered to PCB ground plane for thermal management and electrical grounding.
| 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 and noise rejection. |
| 2 (GND) | Ground and thermal pad | Serves as primary return path and heatsink; must connect to large copper area for thermal dissipation. |
| 3 (SHDN) | Active-low shutdown control | Pulling low disables regulator and reduces supply current to 0.1µA; connect to VIN for normal operation. |
| 4 (RESET) | Active-low reset output | Push-pull configuration; asserts low during power-up, brownout, or MR activation and holds for ≥1200ms post-recovery. |
| 5 (MR) | Active-low manual reset input | Asserts RESET when pulled low; internal 40kΩ pullup to VOUT eliminates external biasing; compatible with mechanical switches or logic drivers. |
| 6 (OUT) | Regulated output | Delivers 3.0V @ 300mA; requires ≥3.3µF low-ESR ceramic capacitor to GND for loop stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated manual reset input (MR) | Enables system-level reset initiation without compromising regulated output integrity - no external supervisor IC needed. |
| -12.5% reset threshold with 1200ms timeout | Guarantees robust power-on reset timing for processors requiring extended clock stabilization before boot. |
| 82µA quiescent current | Extends battery runtime in always-on portable devices such as PDAs and Bluetooth modules by minimizing idle power loss. |
| Reverse current protection (0.01µA OUT→IN) | Prevents backfeeding into primary battery when backup source powers OUT - essential for battery-swappable designs. |
| Thermal shutdown with 20°C hysteresis | Protects against sustained overload or poor PCB layout by cycling regulation until junction cools, avoiding permanent damage. |
Applications
| Handheld Instruments | PCMCIA/USB Devices |
|---|---|
Use Scenario: Power management in palm-sized test meters with real-time display and data logging. IC Role / Device Role / Timing Role: Provides stable 3.0V rail for MCU and ADC while asserting RESET until supply and oscillator stabilize. Use Value: Eliminates discrete supervisor IC and reduces BOM count; MR pin allows front-panel reset button without additional logic. |
Use Scenario: Compact peripheral cards requiring hot-plug detection and fast power sequencing. IC Role / Device Role / Timing Role: Regulates 3.0V I/O supply and generates synchronized reset pulse upon card insertion or VIN ramp-up. Use Value: 1200ms timeout ensures USB controller firmware completes enumeration before host communication begins. |
| Cellular Telephones | Digital Cameras |
Use Scenario: Baseband processor power domain in dual-SIM smartphones with aggressive power gating. IC Role / Device Role / Timing Role: Supplies 3.0V core voltage and asserts RESET during RF transmit bursts causing transient droop. Use Value: MR capability allows baseband SoC to trigger controlled reboot during firmware update or thermal throttling events. |
Use Scenario: Image sensor and ISP power domain in compact point-and-shoot cameras. IC Role / Device Role / Timing Role: Delivers low-noise 3.0V supply and initiates camera reset on lens motor stall or battery swap. Use Value: 82µA IQ extends standby time between shots; reverse current protection prevents image buffer corruption during battery replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6472UT30BD4 | Same pinout and electrical specs, but -7.5% reset threshold (2.775V) and 2.5ms timeout - tighter tolerance, shorter delay. | Better suited for high-speed processors needing faster reset release; less margin for slow-ramping supplies. | Select MAX6472UT30BD4 if system requires earlier reset deassertion and tighter supply tolerance monitoring. |
| TPS76330DBVR | 300mA LDO with 3.0V output and 1200ms reset, but no MR input; 110µA IQ; different pinout (SOT-23-5). | Lacks manual reset functionality - requires external logic or switch circuitry for user-initiated reset. | Choose TPS76330DBVR only when MR is unnecessary and footprint compatibility permits redesign. |
Compared with MAX6472UT30BD4, the MAX6471UT30BD4 offers longer reset hold time for slower clock sources, while versus TPS76330DBVR it provides integrated MR functionality eliminating external components and simplifying board layout in space-constrained portable designs.
Availability
MAX6471UT30BD4 is available at Aetrix Electronics and suitable for handheld instruments, cellular telephones, and digital cameras requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for MAX6471UT30BD4 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 solutions for industrial, automotive, and consumer applications.
The MAX6469–MAX6484 product line was engineered specifically for battery-powered portable electronics needing integrated power regulation and microprocessor supervision in minimal footprint - emphasizing ultra-low IQ, precise reset timing, and robust fault protection.
FAQ
What is the reset timeout period of the MAX6471UT30BD4?
The MAX6471UT30BD4 has a guaranteed minimum reset timeout period of 1200ms. This duration begins after VOUT rises above the -12.5% reset threshold (2.625V for 3.0V output) and ensures the microprocessor remains held in reset long enough for clocks and peripherals to stabilize. The actual timeout may extend slightly due to process variation, but never falls below 1200ms under specified conditions.
Does the MAX6471UT30BD4 support manual reset functionality?
Yes, the MAX6471UT30BD4 includes a dedicated MR (manual reset) input on Pin 5. When pulled low, it asserts the active-low RESET output regardless of VOUT status - enabling user-triggered or test-initiated resets while maintaining valid 3.0V regulation. The internal 40kΩ pullup to VOUT eliminates need for external biasing, and the pin accepts standard TTL/CMOS logic levels.
What is the maximum input voltage rating for the MAX6471UT30BD4?
The MAX6471UT30BD4 has an absolute maximum input voltage rating of +7V on the IN pin. However, its operational input voltage range is specified from +2.5V to +5.5V. Operating above +5.5V risks exceeding safe power dissipation limits and may trigger thermal shutdown; sustained use beyond +5.5V is not recommended even if within absolute max ratings.
Can the MAX6471UT30BD4 be used with a backup supercapacitor on the OUT pin?
Yes, the MAX6471UT30BD4 supports backup operation via supercapacitor on OUT. When IN is removed, the device draws only ~40µA from OUT to GND, allowing the supercapacitor to sustain 3.0V for extended periods. RESET asserts during this state, signaling the system to enter low-power mode. Reverse current protection (0.01µA OUT→IN) prevents discharge back into the main battery.
What package type does the MAX6471UT30BD4 use?
The MAX6471UT30BD4 uses a 6-pin SOT23 package (JEDEC MO-178AA) with exposed thermal pad. This compact surface-mount package measures 2.9mm × 1.6mm × 1.1mm and requires standard reflow soldering per JEDEC J-STD-020. The exposed paddle must be soldered to PCB ground plane for optimal thermal performance and electrical grounding.
MAX6471UT30BD4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- 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 (3V)
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- 0.19V @ 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:
- SOT-23-6
MAX6471UT30BD4 FAQ
1.How can I place an order for MAX6471UT30BD4 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6471UT30BD4 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 MAX6471UT30BD4 reliable?
The price and inventory of MAX6471UT30BD4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6471UT30BD4 is usually 5 days.
3.What payment methods are accepted for MAX6471UT30BD4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6471UT30BD4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6471UT30BD4?
MAX6471UT30BD4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6471UT30BD4 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 MAX6471UT30BD4?
For technical support, including MAX6471UT30BD4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6471UT30BD4 requirements.
6.How does Aetrix verify that MAX6471UT30BD4 is sourced from the original manufacturer or authorized distributors?
All MAX6471UT30BD4 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 MAX6471UT30BD4 meets industry standards.
7.What is the process for return or replacement of MAX6471UT30BD4?
All MAX6471UT30BD4 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6471UT30BD4, 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 MAX6471UT30BD4 part is unused and in its original packaging.
Return procedure for MAX6471UT30BD4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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