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Analog Devices Inc./Maxim Integrated MAX6470TA18AD3+T
- Part No.:
- MAX6470TA18AD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6470TA18AD3+T.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,243
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Product details
Overview
MAX6470TA18AD3+T from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 1.8V output, -12.5% reset threshold, and 150ms minimum reset timeout. It features 82µA quiescent current, 55mV dropout at 150mA, and shutdown mode drawing 0.1µA. Designed for battery-powered portable electronics requiring stable voltage and reliable power-on reset.
For engineers reviewing the MAX6470TA18AD3+T datasheet, MAX6470TA18AD3+T pinout, MAX6470TA18AD3+T application, or MAX6470TA18AD3+T equivalent, this device delivers verified ±2.0% output accuracy over -40°C to +85°C, push-pull active-low RESET, active-low SHDN control, and TDFN-EP package compatibility with thermal pad grounding - critical for handheld instrumentation and USB peripheral power design.
Technical Context
The MAX6470TA18AD3+T integrates a precision LDO core and supervisor logic sharing a common bandgap reference. Its regulator uses a PMOS pass transistor enabling ultra-low dropout (55mV @ 150mA) and reverse current protection (0.01µA OUT→IN leakage). The reset circuit monitors VOUT against a -12.5% threshold and asserts push-pull RESET for ≥150ms after recovery.
It implements active-low shutdown (SHDN) that disables the pass element, reference, and control circuitry - reducing supply current to 0.1µA typ. Input voltage range is 2.5V to 5.5V; undervoltage lockout triggers below 2.25V (min), ensuring clean startup sequencing in multi-rail systems.
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 for SoC cores, Bluetooth radios, and sensor hubs without external boost. |
| Dropout Voltage | 55mV at 150mA load - enables operation from single-cell Li-ion (3.0V min) down to 1.85V input. |
| Quiescent Current | 82µA typical - extends battery life in always-on monitoring applications like wearables. |
| Reset Threshold | -12.5% of nominal VOUT (1.575V) - provides conservative brownout detection for 1.8V I/O domains. |
| Reset Timeout | 150ms minimum - satisfies boot timing requirements of ARM Cortex-M and RISC-V processors. |
| Shutdown Current | 0.1µA typical - supports deep-sleep modes in energy-harvesting and IoT edge nodes. |
| Input Voltage Range | 2.5V to 5.5V - compatible with USB 5V, Li-ion, and dual-cell alkaline inputs without pre-regulation. |
Pinout & Package
MAX6470TA18AD3+T is housed in an 8-pin TDFN-EP (3mm × 3mm) package with exposed thermal pad. Pin 1 is IN; Pin 2 is GND; Pin 3 is SHDN; Pin 4 is RESET (push-pull, active-low); Pin 5 is SET (tied to GND for fixed 1.8V output); Pin 6 is OUT; Pins 7–8 are unused; EP is internally connected to GND and must be soldered to PCB ground plane for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Regulator input | Accepts 2.5V–5.5V supply; requires 0.1µF bypass capacitor to GND for stability. |
| 2 (GND) | Power and thermal ground | Primary return path and heatsink; must connect to large copper area or ground plane. |
| 3 (SHDN) | Active-low shutdown control | Pull low to disable regulator and reduce supply current to 0.1µA; pull high to enable. |
| 4 (RESET) | Push-pull active-low reset output | Drives µP reset pin directly; asserts low during power-up, brownout, or SHDN assertion. |
| 5 (SET) | Feedback configuration input | Connected to GND for fixed 1.8V output; open or externally biased for adjustable mode. |
| 6 (OUT) | Regulated output | Delivers 1.8V/300mA; requires ≥3.3µF low-ESR ceramic capacitor to GND. |
| EP | Exposed thermal pad | Internally tied to GND; soldering to PCB ground improves thermal resistance by >50%. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated microprocessor reset | Eliminates need for external supervisor IC; reduces BOM count and board space in compact designs. |
| Low dropout voltage (55mV @ 150mA) | Enables high-efficiency regulation from marginal input sources - e.g., aging batteries or shared rails. |
| 0.1µA shutdown current | Supports multi-year battery life in maintenance-free IoT sensors and remote telemetry units. |
| Reverse current protection (0.01µA) | Prevents backfeed from backup capacitors or secondary supplies into primary battery source. |
| Thermal and short-circuit protection | Guarantees safe operation under fault conditions without external current-limiting components. |
| ±2.0% output accuracy over temperature | Meets tight tolerance requirements of FPGA I/O banks and ADC reference supplies. |
Applications
| Handheld Instruments | USB Peripheral Devices |
|---|---|
|
Use Scenario: Powering ARM-based data loggers with real-time clock, SD card, and analog front-end in field-deployable PDAs. IC Role / Device Role / Timing Role: Primary 1.8V core regulator and power-on reset generator for deterministic boot sequence. Use Value: 55mV dropout allows operation down to 1.85V input, extending usable battery range by 12% vs. legacy 200mV-dropout regulators. |
Use Scenario: Regulating 1.8V supply for USB-to-UART bridge ICs and EEPROM in compact dongles. IC Role / Device Role / Timing Role: Single-chip solution providing clean 1.8V rail and synchronized reset to ensure UART firmware loads before enumeration. Use Value: Push-pull RESET eliminates need for external pull-up resistor, saving 0.5mm² PCB area and simplifying layout. |
| Bluetooth Low Energy Modules | Notebook Subsystem Power |
|
Use Scenario: Supplying 1.8V to BLE SoC RF transceivers and digital baseband in hearables and trackers. IC Role / Device Role / Timing Role: LDO with integrated reset ensures radio subsystem powers up only after stable 1.8V is established. Use Value: 82µA quiescent current enables <10µA system sleep current when combined with SoC deep-sleep modes. |
Use Scenario: Providing 1.8V for embedded controller (EC) and keyboard controller in ultrabook platforms. IC Role / Device Role / Timing Role: Secondary regulator with SHDN controlled by EC to gate power to auxiliary peripherals. Use Value: 0.1µA shutdown current prevents parasitic drain on main battery during long-term storage. |
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 fixed, 200mA, no integrated reset; requires external supervisor (e.g., TPS3808G18). | Lacks reset functionality - adds component count and timing coordination complexity. | Choose only if system already includes a discrete supervisor and space permits two ICs. |
| ADM7171ACPZ-1.8-R7 | 1.8V fixed, 800mA, no reset; higher PSRR (70dB @ 1kHz) but 250µA IQ and SOT-23-5 package. | Higher current capability but no reset integration - unsuitable for µP boot sequencing without redesign. | Select when peak load exceeds 300mA and reset is handled elsewhere; avoid for new compact designs. |
Compared with TPS79918YZTT and ADM7171ACPZ-1.8-R7, MAX6470TA18AD3+T uniquely combines 300mA drive, 82µA IQ, and fully integrated reset in a thermally enhanced TDFN - reducing total solution size by 35% and eliminating timing margin risks in power-up sequencing.
Availability
MAX6470TA18AD3+T is available at Aetrix Electronics and suitable for handheld instruments, USB peripheral devices, and Bluetooth modules requiring stable component supply with full lifecycle support and RoHS-compliant packaging.
Supply support for MAX6470TA18AD3+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 and mixed-signal ICs for power management, sensing, and interface applications in demanding environments.
The MAX6469–MAX6484 family was engineered specifically for battery-powered portable equipment needing integrated reset and ultra-low IQ - targeting PDA, cellular, and notebook subsystem power rails where board space and runtime are critical.
FAQ
What is the exact output voltage tolerance of MAX6470TA18AD3+T over temperature?
The MAX6470TA18AD3+T guarantees ±2.0% output voltage accuracy across the full -40°C to +85°C operating range, measured at 1mA ≤ IOUT ≤ 300mA. This specification is confirmed in the Electrical Characteristics table of the official datasheet and applies specifically to the MAX6470 variant with fixed 1.8V output. At +25°C, the tighter ±1.1% tolerance holds for 2mA ≤ IOUT ≤ 100mA loads.
Does MAX6470TA18AD3+T support push-pull or open-drain RESET configuration?
MAX6470TA18AD3+T features a push-pull active-low RESET output, as indicated by the "A" suffix in its ordering code (MAX6470TA18AD3+T). This allows direct driving of microprocessor reset inputs without an external pull-up resistor. Open-drain variants use the "B" suffix (e.g., MAX6470TB18AD3+T) and require external pull-up.
What is the minimum input voltage required for MAX6470TA18AD3+T to regulate 1.8V output at 300mA?
At 300mA load, MAX6470TA18AD3+T requires a minimum input voltage of 1.914V (1.8V + 114mV dropout), per the Electrical Characteristics table. However, the absolute minimum VIN for functional operation is 2.5V due to internal circuitry requirements - below this, undervoltage lockout activates and RESET asserts regardless of output voltage.
Can MAX6470TA18AD3+T be used with a remote sense configuration?
No - MAX6470TA18AD3+T does not support remote sensing. It uses the SET pin for fixed/adjustable output selection only. Remote feedback (FB pin) is exclusive to MAX6475/MAX6476/MAX6483/MAX6484 variants. Using MAX6470TA18AD3+T for remote sense would require external op-amp compensation and is not supported by its internal architecture.
Is the exposed pad (EP) on MAX6470TA18AD3+T electrically connected, and how should it be handled?
Yes - the exposed pad (EP) on MAX6470TA18AD3+T is internally connected to GND and must be soldered to the PCB ground plane. It serves as both thermal dissipation path and electrical ground connection. Leaving EP unconnected degrades thermal performance by >60% and risks exceeding junction temperature limits under 300mA load.
MAX6470TA18AD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX6470TA18AD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6470TA18AD3+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 MAX6470TA18AD3+T reliable?
The price and inventory of MAX6470TA18AD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6470TA18AD3+T is usually 5 days.
3.What payment methods are accepted for MAX6470TA18AD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6470TA18AD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6470TA18AD3+T?
MAX6470TA18AD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6470TA18AD3+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 MAX6470TA18AD3+T?
For technical support, including MAX6470TA18AD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6470TA18AD3+T requirements.
6.How does Aetrix verify that MAX6470TA18AD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6470TA18AD3+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 MAX6470TA18AD3+T meets industry standards.
7.What is the process for return or replacement of MAX6470TA18AD3+T?
All MAX6470TA18AD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6470TA18AD3+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 MAX6470TA18AD3+T part is unused and in its original packaging.
Return procedure for MAX6470TA18AD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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