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Analog Devices Inc./Maxim Integrated MAX6470TA18AD3+
- Part No.:
- MAX6470TA18AD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6470TA18AD3+.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:732
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Product details
Overview
MAX6470TA18AD3+ from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 1.8V output, ±2.0% accuracy over -40°C to +85°C, 82µA quiescent current, and 150ms minimum reset timeout. It features active-low push-pull RESET, shutdown control (0.1µA standby), and operates from 2.5V to 5.5V input - ideal for battery-powered portable electronics requiring reliable power sequencing and brownout protection.
For engineers reviewing the MAX6470TA18AD3+ datasheet, MAX6470TA18AD3+ pinout, MAX6470TA18AD3+ application, or MAX6470TA18AD3+ equivalent, key selection criteria include its guaranteed 300mA output under dropout conditions, integrated reset with selectable timeout, shutdown functionality, thermal/short-circuit protection, and compatibility with compact 8-pin TDFN-EP packaging for space-constrained designs.
Technical Context
The MAX6470TA18AD3+ integrates a precision LDO regulator core with a dedicated reset supervisor sharing the same voltage reference. Its regulator uses a PMOS pass device enabling ultra-low dropout (55mV at 150mA) and reverse current blocking (0.01µA OUT→IN leakage). The reset circuit monitors VOUT against a -7.5% threshold (suffix 'A') and asserts active-low RESET for ≥150ms after recovery.
It implements digital shutdown control via SHDN pin, reducing supply current to 0.1µA (typ), and supports stable operation with 3.3µF minimum ceramic output capacitance. The device is specified for full industrial temperature range (-40°C to +85°C) and includes thermal shutdown (180°C trip, 20°C hysteresis) and current limiting (450mA min).
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 and FPGAs. |
| Max Output Current | 300mA guaranteed - sufficient to power SoCs, RF transceivers, or sensor subsystems without external boost. |
| Dropout Voltage | 55mV at 150mA load - enables operation down to VIN = 1.855V, critical for single-cell Li-ion or alkaline battery systems. |
| Quiescent Current | 82µA typical - minimizes battery drain in always-on monitoring or sleep-mode applications. |
| Reset Threshold | -7.5% of nominal VOUT (1.665V) - triggers RESET before microprocessor supply tolerance violation per JEDEC JESD8-12. |
| Reset Timeout | 150ms minimum - satisfies boot-time stabilization requirements for ARM Cortex-M and similar embedded processors. |
| Shutdown Current | 0.1µA typical - enables true zero-power off-state when paired with system-level power management. |
Pinout & Package
MAX6470TA18AD3+ is housed in an 8-pin TDFN-EP (3mm × 3mm, 0.5mm pitch) package with exposed thermal pad. The EP pad must be soldered to PCB ground plane for optimal thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator input | Accepts 2.5V–5.5V supply; requires 0.1µF bypass to GND for noise immunity and stability. |
| 2 (GND) | Ground reference & thermal path | Primary return path; must connect to large copper area or ground plane for heat dissipation and low-noise operation. |
| 3 (SHDN) | Active-low shutdown control | Pull low to disable regulator and reduce IQ 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 until 150ms after VOUT stabilizes. |
| 5 (SET) | Feedback configuration selector | Connected to GND internally to enable fixed 1.8V output; not used for adjustable mode in this variant. |
| 6 (OUT) | Regulated output | Delivers 1.8V @ 300mA; requires ≥3.3µF low-ESR ceramic capacitor to GND for transient response and stability. |
| 7–8 (EP) | Exposed thermal pad | Internally connected to GND; must be soldered to PCB ground plane - not used as signal connection. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated microprocessor reset | Eliminates need for discrete supervisor IC - reduces BOM count and layout area while ensuring synchronized power-good signaling. |
| Low dropout voltage | 55mV at 150mA enables >97% efficiency at light loads and extends usable battery life in 1.8V systems. |
| Reverse current protection | 0.01µA typical OUT→IN leakage prevents backfeeding into depleted batteries or unintended power paths. |
| Thermal and short-circuit protection | Auto-recovering thermal shutdown (180°C/20°C hysteresis) and 450mA current limit ensure robustness in fault conditions. |
| Industrial temperature range | Specified from -40°C to +85°C - validated for deployment in handheld instruments, wireless modules, and automotive accessory environments. |
Applications
| Handheld Instruments | PCMCIA/USB Devices |
|---|---|
|
Use Scenario: Powering ARM-based data loggers and portable multimeters with single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Primary 1.8V LDO supplying microcontroller core voltage and ADC reference, with integrated reset ensuring clean boot after battery insertion or voltage recovery. Use Value: Eliminates external reset IC and saves 2.5mm² board area; 55mV dropout allows operation down to 1.855V, extending runtime by ~12% vs. legacy 200mV-dropout regulators. |
Use Scenario: Providing regulated 1.8V supply to USB 2.0 PHY and controller ICs in compact dongles and card readers. IC Role / Device Role / Timing Role: Stable low-noise power source with synchronized RESET assertion during hot-plug events and bus enumeration. Use Value: 82µA quiescent current meets USB suspend-mode leakage budgets; 150ms reset timeout satisfies USB 2.0 enumeration timing requirements. |
| Bluetooth Modules | Digital Cameras |
|
Use Scenario: Supplying 1.8V to Bluetooth LE SoCs (e.g., Nordic nRF52) in wearables and beacons. IC Role / Device Role / Timing Role: Core voltage regulator with shutdown control for deep-sleep modes and integrated reset for cold-start reliability. Use Value: 0.1µA shutdown current enables multi-year battery life in coin-cell-powered beacons; push-pull RESET drives SoC reset pin without pull-up resistor. |
Use Scenario: Powering image sensor interface logic and ISP cores in compact point-and-shoot cameras. IC Role / Device Role / Timing Role: Low-noise 1.8V rail generator with fast startup (<20µs) and brownout detection to prevent corrupted frame capture during battery sag. Use Value: 75µVRMS output noise (shared family spec) preserves SNR in analog front-end stages; thermal shutdown prevents overheating during burst-mode video capture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS79918YZTR | 1.8V fixed, 200mA, no integrated reset, 170mV dropout at 200mA, 25µA IQ | Requires external reset IC (e.g., TPS3808) for power sequencing - increases component count and layout complexity. | Select when lower quiescent current is critical and reset functionality can be implemented externally. |
| ADM7172ACPZ-1.8-R7 | 1.8V fixed, 200mA, no reset, 125mV dropout at 200mA, 1.3mA IQ, higher PSRR | Lacks reset supervision entirely; unsuitable for systems requiring guaranteed power-on reset assertion. | Prefer for noise-sensitive analog rails where reset is handled by separate supervisor or host processor. |
Compared with TPS79918YZTR and ADM7172ACPZ-1.8-R7, MAX6470TA18AD3+ uniquely combines 300mA drive, ultra-low dropout, integrated reset with programmable timeout, and sub-µA shutdown - making it the only single-chip solution for space- and battery-constrained embedded systems requiring autonomous power sequencing.
Availability
MAX6470TA18AD3+ is available at Aetrix Electronics and suitable for handheld instrumentation, USB peripheral design, and Bluetooth module development requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6470TA18AD3+ 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, communications, and consumer markets.
MAX6470TA18AD3+ belongs to the MAX6469–MAX6484 family of LDOs with integrated reset - designed specifically for battery-powered portable equipment needing compact, low-power, self-contained power supervision and regulation.
FAQ
What is the reset threshold accuracy and timeout period for MAX6470TA18AD3+?
The MAX6470TA18AD3+ uses the 'A' suffix indicating a -7.5% reset threshold (1.665V for 1.8V output) and 'D3' suffix specifying a 150ms minimum reset timeout period. This combination ensures reliable assertion of RESET during brownout events and holds RESET asserted long enough for microprocessor clock stabilization and internal state initialization before release.
Does MAX6470TA18AD3+ support adjustable output voltage?
No, MAX6470TA18AD3+ is configured for fixed 1.8V output. Its SET pin is internally connected to GND to select the preset voltage; external resistor dividers are not supported in this variant. Adjustable operation is only available in MAX6469–MAX6472/MAX6477–MAX6480 variants with appropriate suffixes and pin configurations.
What package type and thermal considerations apply to MAX6470TA18AD3+?
MAX6470TA18AD3+ uses an 8-pin TDFN-EP package (3mm × 3mm) with exposed thermal pad. The EP pad must be soldered to a PCB ground plane to achieve rated power dissipation (1951mW at +70°C ambient) and maintain junction temperature below +150°C. Thermal resistance θJA is 24.4°C/W with proper board layout.
Can MAX6470TA18AD3+ be used with input voltages below 2.5V?
No - the absolute minimum input voltage is 2.5V per Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 2.5V violates specification and may cause undervoltage lockout (VUVLO = 2.25V to 2.47V) or unstable regulation. For sub-2.5V inputs, consider alternative regulators such as MAX1725 or MAX8865 series.
How does the shutdown function behave in MAX6470TA18AD3+?
In MAX6470TA18AD3+, pulling SHDN low disables the regulator and reduces total supply current to 0.1µA (typ). During shutdown, RESET is asserted low, OUT is unregulated, and internal reference and pass transistor are disabled. Normal operation resumes within 20µs after SHDN is pulled high (≥0.7×VIN), with VOUT settling to 1.8V ±2%.
MAX6470TA18AD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Bulk
- 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 (1.8V)
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- -
- 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:
- 8-TDFN (3x3)
MAX6470TA18AD3+ FAQ
1.How can I place an order for MAX6470TA18AD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6470TA18AD3+ 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 MAX6470TA18AD3+ reliable?
The price and inventory of MAX6470TA18AD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6470TA18AD3+ is usually 5 days.
3.What payment methods are accepted for MAX6470TA18AD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6470TA18AD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6470TA18AD3+?
MAX6470TA18AD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6470TA18AD3+ 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 MAX6470TA18AD3+?
For technical support, including MAX6470TA18AD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6470TA18AD3+ requirements.
6.How does Aetrix verify that MAX6470TA18AD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6470TA18AD3+ 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 MAX6470TA18AD3+ meets industry standards.
7.What is the process for return or replacement of MAX6470TA18AD3+?
All MAX6470TA18AD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6470TA18AD3+, 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 MAX6470TA18AD3+ part is unused and in its original packaging.
Return procedure for MAX6470TA18AD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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