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Analog Devices Inc./Maxim Integrated MAX6470TA28AD3+T
- Part No.:
- MAX6470TA28AD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6470TA28AD3+T.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,346
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Product details
Overview
MAX6470TA28AD3+T from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 2.8V output voltage, ±2.0% accuracy over temperature, 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 MAX6470TA28AD3+T datasheet, MAX6470TA28AD3+T pinout, MAX6470TA28AD3+T application, or MAX6470TA28AD3+T equivalent, this device delivers verified 2.8V regulation with integrated reset supervision, low dropout (65mV at 150mA), thermal/short-circuit protection, and TDFN-EP package compatibility for space-constrained embedded designs.
Technical Context
The MAX6470TA28AD3+T implements a single-channel LDO regulator core with internal bandgap reference and error amplifier, paired with a dedicated reset supervisor using the same reference to monitor VOUT against -7.5% or -12.5% thresholds. Its shutdown input (SHDN) disables the pass transistor and reference, reducing supply current to 0.1µA while retaining reset functionality during battery backup scenarios.
It uses an 8-pin TDFN-EP package with exposed paddle tied to GND, supporting thermal dissipation up to 1951mW at +70°C. The device supports preset 2.8V output via internal resistor divider (SET = GND), and includes reverse current protection (0.01µA OUT→IN leakage) and 450mA current limiting - all specified across -40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±2.0% over -40°C to +85°C - ensures stable core logic supply for microcontrollers in portable systems. |
| Max Output Current | 300mA guaranteed - sufficient to power mid-complexity SoCs, RF modules, or sensor subsystems without external boost. |
| Dropout Voltage | 65mV at 150mA load - enables operation down to VIN = 2.865V, critical for single-cell Li-ion or alkaline battery longevity. |
| Quiescent Current | 82µA typical - minimizes standby drain in always-on IoT nodes or sleep-mode peripherals. |
| Reset Timeout | 150ms minimum - meets processor boot stabilization requirements for ARM Cortex-M and similar MCUs. |
| Reset Threshold | -7.5% of VOUT (2.61V) - asserts RESET before supply falls below microprocessor tolerance, preventing erratic execution. |
| Shutdown Current | 0.1µA typical - allows multi-year battery life in maintenance-free remote sensors when inactive. |
| Input Voltage Range | 2.5V to 5.5V - compatible with USB, single-cell Li-ion (2.7–4.2V), and 3.3V/5V system rails. |
Pinout & Package
MAX6470TA28AD3+T is housed in an 8-pin TDFN-EP (3mm × 3mm, 0.5mm pitch) package with exposed thermal pad (EP) internally connected to GND. The EP must be soldered to a PCB ground plane for thermal management and electrical stability.
| 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) | Ground / Thermal Sink | Primary return path and thermal conduction node; must connect to large copper area or ground plane. |
| 3 (SHDN) | Active-Low Shutdown Control | Pulled high to VIN for normal operation; pulling low disables regulator and reduces IQ to 0.1µA. |
| 4 (RESET) | Active-Low Push-Pull Reset Output | Asserts low during power-up, brownout, or SHDN activation; holds low for ≥150ms after VOUT stabilizes. |
| 5 (SET) | Feedback Reference Input | Connected to GND for fixed 2.8V output; open or floating not allowed - ties internal divider to select VOUT. |
| 6 (OUT) | Regulated Output | Delivers 2.8V @ up to 300mA; requires ≥3.3µF low-ESR ceramic capacitor to GND for transient response and stability. |
| 7,8 (NC) | No Connect | Not internally bonded; left unconnected per datasheet - no routing or termination required. |
| EP | Exposed Thermal Pad | Internally tied to GND; must be soldered to PCB ground plane to achieve rated power dissipation (1951mW). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Microprocessor Reset | Eliminates need for external supervisor IC by providing accurate, temperature-stable reset assertion at -7.5% VOUT with 150ms timeout. |
| Low Dropout Performance | 65mV dropout at 150mA enables >97% efficiency at 2.8V output from 3.0V input - extends usable battery voltage range. |
| Ultra-Low Quiescent Current | 82µA operating / 0.1µA shutdown current supports multi-year operation in coin-cell-powered devices like wearables and asset trackers. |
| Reverse Current Protection | 0.01µA typical OUT→IN leakage prevents backfeeding into depleted batteries or unintended power sourcing during hot-swap events. |
| Thermal & Short-Circuit Protection | Auto-shutdown at +180°C junction temperature with 20°C hysteresis, plus 450mA current limit - ensures robustness in uncontrolled environments. |
| TDFN-EP Package | 3mm × 3mm footprint with exposed pad delivers 24.4mW/°C thermal resistance - enables compact, thermally efficient layout in handheld and wearable PCBs. |
Applications
| Handheld Instruments | Bluetooth Modules |
|---|---|
Use Scenario: Powering ARM-based data loggers in field-deployed environmental sensors with single-cell Li-ion battery. IC Role / Device Role: Primary 2.8V LDO supplying MCU core, ADC, and wireless transceiver; RESET ensures clean boot after battery insertion or voltage recovery. Use Value: 65mV dropout preserves 200+ mV of usable battery headroom; 150ms reset timeout guarantees full oscillator stabilization before firmware execution. |
Use Scenario: Regulating power for Bluetooth LE audio accessories (earbuds, trackers) with tight size constraints and multi-year battery life targets. IC Role / Device Role: Fixed 2.8V supply for BLE SoC and MEMS microphone; SHDN enables host-controlled deep-sleep mode with 0.1µA system standby. Use Value: 82µA quiescent current directly extends battery life; TDFN-EP package fits within 3×3mm board area reserved for power ICs in ultra-thin form factors. |
| Notebook Subsystems | Digital Cameras |
Use Scenario: Supplying auxiliary 2.8V rail for fingerprint sensor or eMMC controller in ultrabook designs where main PMIC lacks dedicated low-noise LDO. IC Role / Device Role: Secondary regulated source with independent reset signaling - decouples sensor subsystem reliability from main platform power sequencing. Use Value: ±2.0% output accuracy ensures consistent sensor biasing; push-pull RESET drives FPGA or MCU reset line without external pull-up. |
Use Scenario: Powering image signal processor (ISP) and CMOS sensor interface in compact digital cameras powered by dual AA/AAA alkaline cells. IC Role / Device Role: Stable 2.8V rail tolerant of input sag during flash LED bursts; RESET prevents ISP lockup during battery voltage dip. Use Value: 450mA current limit handles peak ISP loads without shutdown; reverse leakage protection avoids battery drain when camera is off but sensor remains biased. |
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 | 200mA output, 120mV dropout at 150mA, no integrated reset - requires external supervisor IC. | Lacks built-in reset; suitable only when discrete reset timing or threshold customization is needed. | Select if system already uses TI-supervised reset architecture or requires AEC-Q100 automotive qualification. |
| NCP114AMX28TBG | 150mA output, 140mV dropout at 100mA, 1.8µA quiescent current, no reset function. | Lower IQ but no reset integration; requires separate reset IC and increases BOM count and board area. | Prefer for ultra-low-power sensor nodes where reset is handled by MCU internal POR or external discrete supervisor. |
Compared with TPS76328QDBVRQ1 and NCP114AMX28TBG, MAX6470TA28AD3+T uniquely combines 300mA drive, 65mV dropout, integrated 150ms reset, and 0.1µA shutdown in one TDFN-EP package - reducing component count, layout complexity, and total solution cost for portable battery-powered systems.
Availability
MAX6470TA28AD3+T is available at Aetrix Electronics and suitable for handheld instruments, Bluetooth modules, notebook subsystems, and digital cameras requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6470TA28AD3+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 demanding industrial, medical, and portable applications.
MAX6470TA28AD3+T belongs to the MAX6469–MAX6484 family of 300mA LDOs with integrated microprocessor reset - engineered specifically for battery-powered portable equipment needing guaranteed power sequencing, low quiescent current, and compact thermal packaging.
FAQ
What is the exact output voltage and tolerance of MAX6470TA28AD3+T?
The MAX6470TA28AD3+T provides a fixed 2.8V output voltage with ±2.0% accuracy over the full -40°C to +85°C operating temperature range. This specification is guaranteed across load currents from 1mA to 300mA and input voltages from 2.5V to 5.5V, ensuring reliable operation in battery-powered portable systems where voltage margin is critical.
Does MAX6470TA28AD3+T include a reset function, and what is its timeout period?
Yes, MAX6470TA28AD3+T integrates a microprocessor reset circuit with a 150ms minimum timeout period (denoted by suffix "D3"). The RESET output asserts low when VOUT drops below -7.5% of nominal (2.61V), and remains asserted for ≥150ms after VOUT recovers - meeting standard boot stabilization requirements for ARM Cortex-M and similar processors.
What package type and thermal characteristics does MAX6470TA28AD3+T use?
MAX6470TA28AD3+T is packaged in an 8-pin TDFN-EP (3mm × 3mm) with exposed thermal pad. Its thermal resistance is 24.4mW/°C, enabling up to 1951mW power dissipation at +70°C ambient. The EP must be soldered to a PCB ground plane to achieve rated performance and prevent thermal shutdown under full 300mA load.
How does the shutdown feature operate on MAX6470TA28AD3+T?
The MAX6470TA28AD3+T features an active-low SHDN pin (Pin 3). When pulled low, it disables the pass transistor, reference, and control circuitry, reducing total supply current to 0.1µA typical. During shutdown, RESET remains asserted, and the device retains full reset supervision capability - essential for battery backup and low-power wake-up architectures.
Is MAX6470TA28AD3+T compatible with lead-free assembly processes?
Yes, MAX6470TA28AD3+T is offered in RoHS-compliant, lead(Pb)-free packaging. The "+T" suffix explicitly denotes lead-free construction, qualified for JEDEC J-STD-020C reflow profiles (peak 260°C). Hand soldering and wave soldering are not permitted; only IR/convection reflow per JEDEC 020A paragraph 7.6 Table 3 is supported.
MAX6470TA28AD3+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 (2.8V)
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- 0.21V @ 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:
- 8-TDFN (3x3)
MAX6470TA28AD3+T FAQ
1.How can I place an order for MAX6470TA28AD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6470TA28AD3+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 MAX6470TA28AD3+T reliable?
The price and inventory of MAX6470TA28AD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6470TA28AD3+T is usually 5 days.
3.What payment methods are accepted for MAX6470TA28AD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6470TA28AD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6470TA28AD3+T?
MAX6470TA28AD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6470TA28AD3+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 MAX6470TA28AD3+T?
For technical support, including MAX6470TA28AD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6470TA28AD3+T requirements.
6.How does Aetrix verify that MAX6470TA28AD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6470TA28AD3+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 MAX6470TA28AD3+T meets industry standards.
7.What is the process for return or replacement of MAX6470TA28AD3+T?
All MAX6470TA28AD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6470TA28AD3+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 MAX6470TA28AD3+T part is unused and in its original packaging.
Return procedure for MAX6470TA28AD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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