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Analog Devices Inc./Maxim Integrated MAX6470UT33BD3-T
- Part No.:
- MAX6470UT33BD3-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX6470UT33BD3-T.pdf
- Description:
- IC REG LINEAR LDO WITH MPU RESET
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
MAX6470UT33BD3-T from Maxim Integrated is a 300mA, 3.3V fixed-output low-dropout linear regulator with integrated microprocessor reset circuit, 82µA quiescent current, 114mV dropout at full load, and 150ms minimum reset timeout. It features active-low push-pull RESET, shutdown control (0.1µA standby), and operates across -40°C to +85°C - designed for battery-powered portable systems requiring reliable power sequencing and brownout protection.
For engineers reviewing the MAX6470UT33BD3-T datasheet, MAX6470UT33BD3-T pinout, MAX6470UT33BD3-T application, or MAX6470UT33BD3-T equivalent, this page delivers verified electrical parameters, package mapping to SOT23-6, confirmed reset threshold accuracy (±2.0% over temperature), and real-world use cases in handheld instruments, USB devices, and Bluetooth modules - all grounded in Maxim's official specifications.
Technical Context
The MAX6470UT33BD3-T integrates a precision LDO core with a fully self-contained reset supervisor using the same bandgap reference. Its regulator employs a PMOS pass device enabling ultra-low dropout and reverse current blocking (0.01µA OUT→IN leakage). The reset circuit monitors VOUT directly against a -7.5% threshold (B-suffix) and asserts active-low RESET for ≥150ms after recovery.
This variant belongs to the MAX6469–MAX6484 family subset with SHDN input (no MR pin), fixed 3.3V output (UT33), ±2.0% output accuracy over temperature, and D3 reset timeout (150ms min). It lacks manual reset (MR) and remote sense (FB) functionality - distinguishing it from MAX6471/MAX6475 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2.0% over -40°C to +85°C - ensures stable core logic supply for 3.3V microcontrollers without external feedback. |
| Max Output Current | 300mA guaranteed - sufficient to power baseband processors, RF transceivers, or sensor subsystems in portable designs. |
| Dropout Voltage | 114mV at 300mA - 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 monitoring applications such as Bluetooth LE peripherals. |
| Reset Threshold | -7.5% of VOUT (i.e., 3.0525V min) - triggers reset before microprocessor supply tolerance violation per JEDEC JESD8-12A. |
| Reset Timeout | 150ms minimum - satisfies boot-time requirements for ARM Cortex-M0+ and similar embedded MCUs. |
| Shutdown Current | 0.1µA typical - reduces system standby power to nanoampere levels when host MCU disables power rail. |
Pinout & Package
MAX6470UT33BD3-T is packaged in a 6-pin SOT23-6 (JEDEC MO-178AA) with exposed thermal pad on TDFN variants excluded - this specific part uses the standard SOT23-6 outline per Maxim's Ordering Information table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Regulator Input | Accepts 2.5V–5.5V input; requires 0.1µF ceramic bypass to GND for stability and noise rejection. |
| 2 - GND | Power & Thermal Ground | Primary return path and thermal conduction node; must connect to large PCB copper area for thermal dissipation. |
| 3 - SHDN | Active-Low Shutdown Control | Pulled high to IN for normal operation; pulling low disables regulator and reduces IQ to 0.1µA. |
| 4 - RESET | Active-Low Reset Output | Push-pull driver; asserts low during power-up, brownout, or SHDN assertion; holds for ≥150ms post-recovery. |
| 5 - SET | Feedback Select Node | Internally tied to GND for fixed 3.3V mode; open or floating not allowed - must be grounded per datasheet configuration. |
| 6 - OUT | Regulated Output | Delivers 3.3V/300mA; requires ≥3.3µF low-ESR ceramic capacitor to GND for transient response and stability. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Microprocessor Reset | Eliminates need for discrete supervisor IC - RESET asserts on power-up, brownout, and SHDN activation with guaranteed 150ms hold time. |
| Low Dropout Architecture | PMOS pass element enables 114mV dropout at 300mA - supports operation down to 3.0V input while maintaining 3.3V output. |
| Reverse Current Protection | 0.01µA typical OUT→IN leakage - prevents back-powering of source during battery swap or backup capacitor discharge. |
| Thermal & Short-Circuit Protection | Auto-shutdown at 180°C junction temp with 20°C hysteresis - enables safe operation under sustained overload without external circuitry. |
| Ultra-Low Quiescent Current | 82µA operating / 0.1µA shutdown - extends shelf life and runtime in coin-cell–powered IoT sensors and wearables. |
Applications
| Handheld Instruments | USB Peripheral Devices |
|---|---|
Use Scenario: Power management in palm-sized test meters with LCD display, ADC, and wireless telemetry. IC Role / Device Role / Timing Role: Primary 3.3V LDO supplying MCU, analog front-end, and BLE radio; RESET ensures clean boot after battery insertion or voltage sag. Use Value: 82µA IQ extends alkaline battery life beyond 12 months in sleep mode; 114mV dropout maintains regulation during cold-temperature battery discharge. |
Use Scenario: Self-powered USB audio adapter with DAC, headphone amp, and USB interface controller. IC Role / Device Role / Timing Role: Regulates 3.3V rail from USB 5V via internal LDO; RESET coordinates firmware initialization with USB enumeration timing. Use Value: 150ms reset timeout satisfies USB 2.0 suspend/resume recovery window; push-pull RESET drives USB controller reset pin directly without pull-up resistor. |
| Bluetooth Low Energy Modules | Notebook Subsystem Power |
Use Scenario: Compact BLE beacon using CR2032 coin cell and Nordic nRF52 MCU. IC Role / Device Role / Timing Role: Single-rail 3.3V regulator with integrated reset - replaces discrete LDO + supervisor combo in space-constrained layouts. Use Value: 0.1µA shutdown current enables multi-year battery life in advertising interval sleep; SOT23-6 footprint fits 3.5mm × 3.5mm PCB area. |
Use Scenario: Always-on auxiliary power for notebook keyboard backlight, touchpad, or Thunderbolt controller during S3/S4 sleep states. IC Role / Device Role / Timing Role: Provides isolated 3.3V standby rail; SHDN controlled by EC to gate power during deep sleep; RESET signals EC on rail instability. Use Value: Reverse current blocking prevents standby rail from back-feeding main 5V rail during AC adapter removal; ±2.0% accuracy ensures SoC I/O compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS79933DBVR | No integrated reset; 200mA output; 100µA IQ; 75mV dropout at 150mA | Requires external supervisor (e.g., TPS3808G01) for reset functionality | Select when board space allows separate reset IC and lower dropout is critical at partial load. |
| ADP160AUJZ-3.3-R7 | No reset output; 150mA output; 570nA IQ; 105mV dropout at 150mA | Cannot provide power-on reset signaling - unsuitable for systems requiring sequenced boot. | Choose only for ultra-low-IQ applications where reset is handled elsewhere (e.g., SoC internal POR). |
Compared with MAX6470UT33BD3-T, TPS79933DBVR offers lower dropout but adds BOM complexity and layout area for external reset, while ADP160AUJZ-3.3-R7 achieves nanoscale quiescent current at the cost of missing critical reset functionality - making MAX6470UT33BD3-T the optimal single-chip solution for compact, battery-powered microprocessor systems needing guaranteed power sequencing.
Availability
MAX6470UT33BD3-T is available at Aetrix Electronics and suitable for handheld instruments, USB peripheral devices, and Bluetooth modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6470UT33BD3-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, mixed-signal, and power management ICs for industrial, automotive, and computing applications.
The MAX6469–MAX6484 product line delivers integrated LDO regulators with microprocessor reset for battery-powered portable equipment - emphasizing ultra-low quiescent current, small footprint, and guaranteed power sequencing reliability.
FAQ
What is the reset threshold accuracy and timeout behavior of the MAX6470UT33BD3-T?
The MAX6470UT33BD3-T features a -7.5% reset threshold (B-suffix) with ±2.0% tolerance over temperature, meaning RESET asserts when VOUT drops below 3.0525V (7.5% below 3.3V) and remains asserted for a minimum of 150ms (D3 suffix) after VOUT recovers. This behavior is confirmed in the Electrical Characteristics table and Reset Timeout Delay Guide of the datasheet, ensuring robust immunity to supply transients during microprocessor boot.
Does the MAX6470UT33BD3-T support adjustable output voltage?
No, the MAX6470UT33BD3-T is configured for fixed 3.3V output. Its SET pin must be connected to GND per the datasheet's Pin Description and Applications Information sections. While the MAX6469–MAX6472 family supports adjustable mode via external resistors, the UT33 suffix explicitly denotes preset 3.3V operation - attempting to float or bias SET will result in undefined output voltage and potential instability.
What package type and pin count does the MAX6470UT33BD3-T use?
The MAX6470UT33BD3-T uses a 6-pin SOT23-6 package (JEDEC MO-178AA), as specified in Maxim's Ordering Information table. It does not use the 8-pin TDFN-EP or UCSP variants - those are designated by TA and UC suffixes respectively. The SOT23-6 footprint is industry-standard and compatible with automated pick-and-place assembly.
How does the MAX6470UT33BD3-T handle reverse current flow from output to input?
The MAX6470UT33BD3-T incorporates internal reverse-current protection that limits OUT-to-IN leakage to 0.01µA typical when VOUT > VIN. This prevents back-powering of the input source - critical during battery replacement or supercapacitor backup scenarios. The feature is documented in the Absolute Maximum Ratings and Detailed Description sections, and functions independently of SHDN state.
Can the MAX6470UT33BD3-T be used in automotive applications?
The MAX6470UT33BD3-T is specified for -40°C to +85°C operation and meets industrial temperature grade requirements, but it is not AEC-Q200 qualified or rated for automotive under-hood environments. Its design targets portable consumer and industrial equipment - for automotive infotainment or telematics modules, engineers should select Maxim's automotive-grade equivalents such as the MAX25210, which include extended temperature range and qualification testing.
MAX6470UT33BD3-T 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 (3.3V)
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- 0.18V @ 300mA
- 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
MAX6470UT33BD3-T FAQ
1.How can I place an order for MAX6470UT33BD3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6470UT33BD3-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 MAX6470UT33BD3-T reliable?
The price and inventory of MAX6470UT33BD3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6470UT33BD3-T is usually 5 days.
3.What payment methods are accepted for MAX6470UT33BD3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6470UT33BD3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6470UT33BD3-T?
MAX6470UT33BD3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6470UT33BD3-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 MAX6470UT33BD3-T?
For technical support, including MAX6470UT33BD3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6470UT33BD3-T requirements.
6.How does Aetrix verify that MAX6470UT33BD3-T is sourced from the original manufacturer or authorized distributors?
All MAX6470UT33BD3-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 MAX6470UT33BD3-T meets industry standards.
7.What is the process for return or replacement of MAX6470UT33BD3-T?
All MAX6470UT33BD3-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6470UT33BD3-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 MAX6470UT33BD3-T part is unused and in its original packaging.
Return procedure for MAX6470UT33BD3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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