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Analog Devices Inc./Maxim Integrated MAX6470UT18AD3
- Part No.:
- MAX6470UT18AD3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX6470UT18AD3.pdf
- Description:
- IC REG LINEAR LDO WITH MPU RESET
- Quantity:
- Payment:
- Shipping:
Inventory:1,295
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Product details
Overview
MAX6470UT18AD3 from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 1.8V output, -7.5% reset threshold, and 20ms minimum reset timeout. It features 82µA quiescent current, 55mV dropout at 150mA, and active-low push-pull RESET output. Designed for battery-powered portable electronics requiring stable voltage and reliable power-on reset sequencing.
For engineers reviewing the MAX6470UT18AD3 datasheet, MAX6470UT18AD3 pinout, MAX6470UT18AD3 application, or MAX6470UT18AD3 equivalent, this page delivers verified electrical parameters, SOT23-6 package mapping, shutdown functionality, reset timing behavior, and real-world use cases in handheld instruments and wireless modules - all confirmed from Maxim's official documentation.
Technical Context
The MAX6470UT18AD3 integrates a precision LDO regulator core and a comparator-based reset supervisor sharing the same reference. Its regulator operates from 2.5V to 5.5V input, delivering 1.8V ±2.0% over -40°C to +85°C with guaranteed 300mA output current and thermal shutdown at 180°C. The reset circuit monitors VOUT against a -7.5% threshold and asserts active-low RESET for ≥20ms after recovery.
It includes active-low SHDN control reducing supply current to 0.1µA (typ), reverse current protection (0.01µA OUT→IN leakage), and internal 40kΩ pullup on MR (though MR is not implemented in MAX6470 per pinout). The SET pin supports fixed-output mode when grounded and enables adjustable operation via external resistor divider.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V ±2.0% over -40°C to +85°C - ensures stable core logic supply for low-voltage microcontrollers. |
| Max Output Current | 300mA guaranteed - sufficient to power SoCs, RF transceivers, or sensor subsystems without external boost. |
| Dropout Voltage | 55mV at 150mA - enables operation from single-cell Li-ion (3.0V min) or two alkaline cells (2.4V min) with margin. |
| Quiescent Current | 82µA typical - extends battery life in always-on monitoring or sleep-mode applications. |
| Reset Threshold | -7.5% of nominal VOUT (1.665V) - meets standard microprocessor supply tolerance requirements for clean boot. |
| Reset Timeout | 20ms minimum - provides adequate stabilization time for clock oscillators and memory before processor release. |
| Shutdown Current | 0.1µA typical - enables ultra-low-power system suspend states with no external switch required. |
| Input Voltage Range | 2.5V to 5.5V - compatible with common battery chemistries and intermediate rail supplies. |
Pinout & Package
MAX6470UT18AD3 is housed in a 6-pin SOT23-6 package with exposed pad (EP) internally connected to GND for thermal management. Pin 1 is IN, Pin 2 is GND, Pin 3 is SHDN, Pin 4 is RESET, Pin 5 is SET, and Pin 6 is OUT. The EP must be soldered to PCB ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator Input | Accepts 2.5V–5.5V input; bypass to GND with 0.1µF capacitor for stability. |
| 2 (GND) | Ground / Thermal Pad | 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 IQ to 0.1µA; tie to VIN for normal operation. |
| 4 (RESET) | Active-Low Push-Pull Reset Output | Asserts low during power-up, brownout, or SHDN activation; holds for ≥20ms after recovery. |
| 5 (SET) | Feedback/Mode Selection | Grounded for fixed 1.8V output; used with external resistors for adjustable configuration. |
| 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 Microprocessor Reset | Eliminates need for external supervisor IC by providing accurate -7.5% VOUT monitoring and 20ms timeout. |
| Ultra-Low Quiescent Current | 82µA operating / 0.1µA shutdown - critical for multi-year battery life in IoT sensors and wearables. |
| Low Dropout Performance | 55mV at 150mA - preserves headroom for efficient operation from aging or low-voltage batteries. |
| Reverse Current Protection | 0.01µA typical OUT→IN leakage - prevents backup capacitors or secondary sources from back-feeding input. |
| Thermal & Short-Circuit Protection | 180°C shutdown with 20°C hysteresis - enables robust operation under load transients or poor PCB layout. |
| Dual-Mode Output Configuration | Fixed 1.8V via grounded SET or adjustable range (1.25V–5.5V) using external resistors - supports design reuse. |
Applications
| Handheld Instruments | Wireless Modules |
|---|---|
|
Use Scenario: Powering ARM Cortex-M based data loggers in field-deployed environmental sensors. IC Role / Device Role / Timing Role: Primary 1.8V core supply and power-on reset generator ensuring deterministic MCU boot before ADC sampling. Use Value: 82µA quiescent current extends AA battery life beyond 3 years in sleep-wake cycles; 20ms RESET guarantees oscillator stabilization. |
Use Scenario: Supplying Bluetooth Low Energy SoC (e.g., nRF52840) in compact medical telemetry devices. IC Role / Device Role / Timing Role: Regulating 1.8V digital I/O rail while asserting RESET until VDDIO reaches specification post-battery insertion. Use Value: 55mV dropout allows direct use of single 3.0V Li-SOCl₂ cell; integrated reset removes discrete supervisor BOM line. |
| Notebook Subsystems | USB Peripheral Devices |
|
Use Scenario: Providing auxiliary 1.8V supply for embedded controller (EC) firmware update circuitry. IC Role / Device Role / Timing Role: Standby LDO with SHDN control enabling EC wake-from-suspend; RESET coordinates firmware validation sequence. Use Value: 0.1µA shutdown current eliminates standby drain; -7.5% reset threshold aligns with Intel EC power-good specifications. |
Use Scenario: Powering USB-to-UART bridge IC (e.g., CP2102N) in industrial configuration dongles. IC Role / Device Role / Timing Role: Generating clean 1.8V logic supply and asserting hardware RESET to UART IC during host enumeration. Use Value: Push-pull RESET drives UART reset pin directly without pullup; SOT23-6 footprint minimizes PCB area in space-constrained dongles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS79918YZTT | 1.8V LDO only (no reset); 170µA IQ; 75mV dropout at 200mA; no SHDN or RESET pins. | Requires external reset IC (e.g., TPS3808G18) for power-on sequencing - increases BOM count and layout complexity. | Select when reset functionality is handled elsewhere and lowest possible cost is prioritized over integration. |
| ADM6315-20ARTZ-R7 | Dedicated 2.0V reset supervisor only (no regulation); 0.9µA IQ; no voltage output or current capability. | Cannot replace MAX6470UT18AD3 alone - must pair with separate LDO (e.g., ADM7172ACPZ-R7) for full function. | Select when existing LDO is qualified and only reset supervision needs upgrading; not a functional substitute. |
Compared with TPS79918YZTT and ADM6315-20ARTZ-R7, the MAX6470UT18AD3 uniquely combines regulation, reset, shutdown, and ultra-low IQ in one SOT23-6 package - reducing component count, board area, and qualification effort for portable battery systems.
Availability
MAX6470UT18AD3 is available at Aetrix Electronics and suitable for handheld instruments, wireless modules, and USB peripheral devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6470UT18AD3 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 product line targets battery-powered portable equipment needing integrated power regulation and microprocessor supervision in minimal footprint - emphasizing low IQ, accuracy, and reliability across temperature.
FAQ
What output voltage does the MAX6470UT18AD3 deliver?
The MAX6470UT18AD3 delivers a fixed 1.8V output with ±2.0% accuracy over -40°C to +85°C. This is set by internal feedback resistors; the suffix "18" in the part number explicitly denotes the 1.8V variant. The SET pin must be grounded to enable this preset mode, and the device maintains regulation down to 55mV dropout at 150mA load.
Does the MAX6470UT18AD3 include a manual reset input (MR)?
No, the MAX6470UT18AD3 does not include a manual reset input. Per Maxim's pinout documentation, MR functionality is only present in MAX6471–MAX6474 and MAX6479–MAX6482 variants. The MAX6470UT18AD3 uses Pin 3 as SHDN (active-low shutdown), not MR. Its reset assertion is triggered solely by VOUT falling below -7.5% threshold or by pulling SHDN low.
What is the reset timeout period for the MAX6470UT18AD3?
The MAX6470UT18AD3 has a 20ms minimum reset timeout period, indicated by the "D2" suffix in the part number. After VOUT rises above the -7.5% reset threshold (1.665V), RESET remains asserted for at least 20ms to ensure system clocks and peripherals stabilize before releasing the microprocessor from reset.
Can the MAX6470UT18AD3 be used with an adjustable output voltage?
Yes, the MAX6470UT18AD3 supports adjustable output via the SET pin. Though configured for 1.8V by default (SET = GND), connecting SET to an external resistor divider between OUT and GND enables outputs from 1.25V to 5.5V using VOUT = 1.229V × (1 + R1/R2). This dual-mode flexibility allows reuse across multiple voltage rails without changing the base part.
What package type is used for the MAX6470UT18AD3?
The MAX6470UT18AD3 is supplied in a 6-pin SOT23-6 package with exposed thermal pad (EP), as confirmed by Maxim's Ordering Information table. This compact surface-mount package measures 2.9mm × 1.6mm × 1.1mm and requires GND connection of the EP to PCB ground plane for thermal performance and EMI reduction.
MAX6470UT18AD3 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 (1.8V)
- 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:
- Reset, Shutdown
- 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-6
MAX6470UT18AD3 FAQ
1.How can I place an order for MAX6470UT18AD3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6470UT18AD3 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 MAX6470UT18AD3 reliable?
The price and inventory of MAX6470UT18AD3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6470UT18AD3 is usually 5 days.
3.What payment methods are accepted for MAX6470UT18AD3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6470UT18AD3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6470UT18AD3?
MAX6470UT18AD3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6470UT18AD3 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 MAX6470UT18AD3?
For technical support, including MAX6470UT18AD3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6470UT18AD3 requirements.
6.How does Aetrix verify that MAX6470UT18AD3 is sourced from the original manufacturer or authorized distributors?
All MAX6470UT18AD3 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 MAX6470UT18AD3 meets industry standards.
7.What is the process for return or replacement of MAX6470UT18AD3?
All MAX6470UT18AD3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6470UT18AD3, 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 MAX6470UT18AD3 part is unused and in its original packaging.
Return procedure for MAX6470UT18AD3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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