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Analog Devices Inc./Maxim Integrated MAX6469UT285BD3
- Part No.:
- MAX6469UT285BD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX6469UT285BD3.pdf
- Description:
- IC REG LINEAR LDO 300MA
- Quantity:
- Payment:
- Shipping:
Inventory:807
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Product details
Overview
MAX6469UT285BD3 from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 2.85V output, -7.5% reset threshold, and 150ms minimum reset timeout. It delivers ±2.0% output accuracy over -40°C to +85°C, consumes only 82µA quiescent current, and features active-low push-pull RESET output. It is designed for power management in battery-powered portable electronics requiring reliable supply monitoring and fast startup.
For engineers reviewing the MAX6469UT285BD3 datasheet, MAX6469UT285BD3 pinout, MAX6469UT285BD3 application, or MAX6469UT285BD3 equivalent, key selection considerations include its 2.85V fixed output, 150ms reset timeout, SOT23-6 package, shutdown capability (0.1µA), and dropout voltage of 137mV at 300mA - all critical for compact, low-power embedded systems.
Technical Context
The MAX6469UT285BD3 integrates a precision LDO regulator core with a dedicated reset supervisor sharing the same internal reference. Its regulator operates from 2.5V to 5.5V input and maintains regulation down to 55mV dropout at 150mA load. The reset circuit monitors VOUT directly and asserts active-low RESET when output falls below 92.5% of nominal (i.e., 2.636V at 2.85V), holding it asserted for ≥150ms after recovery.
This device belongs to the MAX6469–MAX6476 subgroup with SOT23-6 packaging, SET pin for optional adjustability, and no manual reset (MR) or remote sense (FB) pins. It includes undervoltage lockout (2.47V typ), thermal shutdown (+180°C), short-circuit protection, and reverse current blocking (0.01µA OUT→IN leakage).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.85V ±2.0% over -40°C to +85°C - ensures stable core logic supply for 2.8V–3.0V microcontrollers. |
| Max Output Current | 300mA guaranteed - sufficient to power mid-complexity SoCs, RF transceivers, or sensor hubs without external pass devices. |
| Dropout Voltage | 137mV 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 standby modes (e.g., Bluetooth LE beacon wake-up circuits). |
| Reset Threshold | -7.5% of VOUT (2.636V) - matches standard µP supply tolerance requirements and avoids false resets during transient load steps. |
| Reset Timeout | 150ms minimum - provides adequate stabilization time for clock oscillators and memory initialization before processor release. |
| Shutdown Current | 0.1µA typical - reduces system static power to nanoampere levels during deep sleep, enabling multi-year coin-cell operation. |
Pinout & Package
MAX6469UT285BD3 is housed in a 6-pin SOT23-6 package with exposed paddle (internally connected to GND). Thermal performance is optimized by soldering the EP pad to a large PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator input | Accepts 2.5V–5.5V supply; requires 0.1µF ceramic bypass to GND for stability and noise rejection. |
| 2 (GND) | Power and thermal ground | Primary return path and heatsink; must connect to PCB ground plane for thermal dissipation and EMI control. |
| 3 (SHDN) | Active-low shutdown control | Pulling low disables regulator and reduces supply current to 0.1µA; tie to IN for normal operation. |
| 4 (RESET) | Active-low push-pull reset output | Drives µP reset pin directly; asserts low during power-up, brownout, or shutdown; no external pull-up needed. |
| 5 (SET) | Feedback configuration pin | Connected to GND for fixed 2.85V output; left floating or tied to divider for adjustable mode (not used in this variant). |
| 6 (OUT) | Regulated output | Delivers 2.85V at up to 300mA; requires ≥3.3µF low-ESR ceramic capacitor to GND for loop stability. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated reset supervisor | Eliminates need for discrete supervisor IC - reduces BOM count and board area in space-constrained designs. |
| Low dropout voltage | 55mV at 150mA enables efficient regulation from weak or aging batteries without premature cutoff. |
| Reverse current protection | 0.01µA max OUT→IN leakage prevents backup capacitors or batteries from discharging into depleted main supplies. |
| Thermal and short-circuit protection | Auto-recovering shutdown at +180°C and 450mA current limit ensure robustness under fault conditions. |
| Ultra-low quiescent current | 82µA operation + 0.1µA shutdown supports >10-year battery life in IoT endpoint applications. |
Applications
| Handheld Medical Sensors | USB-Powered Test Equipment |
|---|---|
Use Scenario: Portable pulse oximeter powered by two AAA alkaline cells (3.0V fresh, dropping to 2.4V). IC Role / Device Role / Timing Role: Primary 2.85V power rail generator and system reset supervisor ensuring clean boot after battery insertion or voltage sag. Use Value: 137mV dropout allows continuous operation until battery reaches 2.987V; 150ms reset timeout guarantees ADC and OLED controller initialization completes before firmware execution. | Use Scenario: Compact USB 2.0 oscilloscope dongle drawing peak 250mA from host port. IC Role / Device Role / Timing Role: Local 2.85V supply for FPGA configuration and analog front-end, with RESET synchronized to USB enumeration timing. Use Value: 82µA quiescent current minimizes host port loading during idle; push-pull RESET eliminates need for external pull-up resistor, saving layout space. |
| Industrial Wireless Sensor Nodes | Low-Power Digital Cameras |
Use Scenario: LoRaWAN node using CR2032 coin cell for multi-year deployment in remote monitoring. IC Role / Device Role / Timing Role: Main system regulator and brownout detector that forces controlled MCU reset before supply collapse corrupts flash writes. Use Value: 0.1µA shutdown current enables >5-year shelf life; -7.5% reset threshold prevents spurious resets during RF transmit current surges. | Use Scenario: Entry-level digital camera with CMOS image sensor and SD card interface. IC Role / Device Role / Timing Role: Dedicated 2.85V rail for image signal processor (ISP) and memory I/O, with RESET coordinating power sequencing with lens actuator driver. Use Value: ±2.0% output accuracy ensures consistent ISP gain calibration; thermal shutdown protects against overheating during burst capture sequences. |
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 | 2.8V fixed output, 150mA max, no integrated reset, requires external supervisor | Lacks built-in reset functionality - increases component count and design complexity | Select only if reset timing is managed externally and lower current suffices |
| NCP302LSN28T1G | 2.8V fixed output, 300mA, no reset, no shutdown, higher IQ (120µA) | No reset or shutdown - unsuitable for battery-backed or safety-critical boot sequencing | Consider only for cost-sensitive, non-battery, always-powered applications |
Compared with TPS76328QDBVRQ1 and NCP302LSN28T1G, MAX6469UT285BD3 uniquely combines 300mA drive, integrated -7.5% reset with 150ms timeout, and 0.1µA shutdown in a single SOT23-6 package - delivering superior integration, lower system-level BOM cost, and guaranteed power-good sequencing for portable microcontroller systems.
Availability
MAX6469UT285BD3 is available at Aetrix Electronics and suitable for handheld medical sensors, USB-powered test equipment, industrial wireless sensor nodes, and low-power digital cameras requiring stable component supply and long-term lifecycle support.
Supply support for MAX6469UT285BD3 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, automotive, and communications markets.
The MAX6469–MAX6484 product line was designed specifically for battery-powered portable electronics needing tightly regulated voltage rails with autonomous power-on reset and ultra-low quiescent current - addressing core challenges in PDA, cellular, and wireless module power architecture.
FAQ
What is the exact output voltage tolerance of the MAX6469UT285BD3 over temperature?
The MAX6469UT285BD3 guarantees ±2.0% output voltage accuracy across the full operating temperature range of -40°C to +85°C. This specification applies to fixed-output operation with the SET pin grounded, and is confirmed in the Electrical Characteristics table under "Output Voltage Accuracy (Fixed Output Voltage Operation)" for the MAX6469–MAX6476 subgroup. At +25°C, tighter ±1.3% tolerance is typical.
Does the MAX6469UT285BD3 support manual reset (MR) functionality?
No, the MAX6469UT285BD3 does not include a manual reset (MR) input. It belongs to the MAX6469/MAX6470/MAX6473–MAX6478/MAX6481–MAX6484 subgroup, which lacks the MR pin. Manual reset is only available on MAX6471–MAX6474 and MAX6479–MAX6482 variants. The MAX6469UT285BD3 relies solely on VOUT monitoring and SHDN assertion for reset initiation.
What is the minimum input voltage required for the MAX6469UT285BD3 to maintain regulation at 300mA load?
At 300mA load, the MAX6469UT285BD3 requires a minimum input voltage of 2.987V to maintain regulation - calculated as VOUT + ΔVDO = 2.85V + 0.137V. This value is derived from the specified 137mV dropout voltage at 300mA for VOUT = +2.8V (interpolated per datasheet Table on p.3), and is validated by the device's guaranteed 300mA output current specification under VIN ≥ 2.5V.
Can the MAX6469UT285BD3 be used with an external NPN transistor for higher current applications?
No, the MAX6469UT285BD3 does not support remote feedback or external pass transistor configurations. It uses the SET pin for optional adjustability but lacks the dedicated FB (feedback) pin found only on MAX6475/MAX6476/MAX6483/MAX6484 variants. Therefore, MAX6469UT285BD3 is limited to its native 300mA output capability and cannot be extended via external transistors.
What package type and thermal characteristics apply to the MAX6469UT285BD3?
The MAX6469UT285BD3 is supplied in a 6-pin SOT23-6 package with exposed paddle (EP), internally connected to GND. Its thermal resistance is θJC = 110°C/W. With 727mW maximum power dissipation at TA = +70°C and 9.1mW/°C derating above that, proper PCB layout - including direct connection of the EP pad to a large ground plane - is essential to maintain junction temperature below +150°C under full 300mA load.
MAX6469UT285BD3 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 (2.85V)
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- -
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 136 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, 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
MAX6469UT285BD3 FAQ
1.How can I place an order for MAX6469UT285BD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6469UT285BD3 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 MAX6469UT285BD3 reliable?
The price and inventory of MAX6469UT285BD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6469UT285BD3 is usually 5 days.
3.What payment methods are accepted for MAX6469UT285BD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6469UT285BD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6469UT285BD3?
MAX6469UT285BD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6469UT285BD3 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 MAX6469UT285BD3?
For technical support, including MAX6469UT285BD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6469UT285BD3 requirements.
6.How does Aetrix verify that MAX6469UT285BD3 is sourced from the original manufacturer or authorized distributors?
All MAX6469UT285BD3 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 MAX6469UT285BD3 meets industry standards.
7.What is the process for return or replacement of MAX6469UT285BD3?
All MAX6469UT285BD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6469UT285BD3, 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 MAX6469UT285BD3 part is unused and in its original packaging.
Return procedure for MAX6469UT285BD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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