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Analog Devices Inc./Maxim Integrated MAX6470TA25BD3+T
- Part No.:
- MAX6470TA25BD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6470TA25BD3+T.pdf
- Description:
- IC REG LIN POS ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,743
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Product details
Overview
MAX6470TA25BD3+T from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, preset 2.5V output voltage, ±2.0% accuracy over -40°C to +85°C, 114mV dropout at 300mA load, and 150ms minimum reset timeout. It delivers stable power and reliable reset signaling for battery-powered microprocessor systems requiring low quiescent current (82µA) and shutdown capability (0.1µA).
For engineers reviewing the MAX6470TA25BD3+T datasheet, MAX6470TA25BD3+T pinout, MAX6470TA25BD3+T application, or MAX6470TA25BD3+T equivalent, this device serves as a compact, single-chip power-and-supervision solution for portable embedded systems where supply stability, brownout detection, and fast startup are critical.
Technical Context
The MAX6470TA25BD3+T integrates a precision LDO regulator core with a dedicated reset supervisor sharing the same reference. Its reset circuit monitors VOUT against a -7.5% threshold (suffix 'A') and asserts an active-low push-pull RESET output for ≥150ms after recovery (suffix 'D3'). The device uses SHDN for digital shutdown control and supports fixed-output operation via internal feedback - no external resistors required when SET is grounded.
It operates across 2.5V–5.5V input, guarantees 300mA output current, and incorporates reverse-current protection (0.01µA OUT→IN leakage), thermal shutdown (+180°C trip), and short-circuit current limiting (450mA min). The 8-pin TDFN-EP package enables high thermal efficiency with its exposed paddle soldered to PCB ground.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±2.0% over -40°C to +85°C - ensures stable core logic supply without external resistor network. |
| Dropout Voltage | 114mV at 300mA load - enables regulation from 2.614V input, critical for single-cell Li-ion or 3×alkaline battery operation. |
| Supply Current | 82µA typical operating, 0.1µA in shutdown - extends battery life in sleep modes of handheld instruments and wireless modules. |
| Reset Threshold | -7.5% of nominal VOUT (i.e., 2.3125V) - meets standard microprocessor supply tolerance requirements for clean boot sequencing. |
| Reset Timeout | 150ms minimum - provides sufficient hold-off time for clock oscillators and memory initialization before processor release. |
| Input Voltage Range | 2.5V to 5.5V - supports direct connection to USB, Li-ion, or multi-cell alkaline sources without pre-regulation. |
| Protection Features | Thermal shutdown (+180°C), short-circuit limit (450mA), reverse current blocking (0.01µA) - ensures robustness in unattended portable deployments. |
Pinout & Package
MAX6470TA25BD3+T is housed in an 8-pin TDFN-EP (3mm × 3mm, 0.75mm height) package with exposed paddle (EP) internally connected to GND. The EP must be soldered to a large PCB ground plane for optimal thermal performance and EMI suppression.
| 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 and noise rejection. |
| 2 (GND) | Ground reference & thermal path | Primary electrical return and heatsink; must connect to large copper area or ground plane for thermal dissipation. |
| 3 (SHDN) | Active-low shutdown control | Pulling low disables regulator and reduces supply current to 0.1µA; tie to IN for normal operation. |
| 4 (RESET) | Active-low push-pull reset output | Asserts low during power-up, brownout, or shutdown; remains low ≥150ms after VOUT recovers to spec. |
| 5 (SET) | Feedback configuration input | Grounded to select fixed 2.5V output; floating or externally biased for adjustable mode (not used in this variant). |
| 6 (OUT) | Regulated output | Delivers up to 300mA at 2.5V; requires ≥3.3µF low-ESR ceramic capacitor to GND for transient response and stability. |
| 7, 8 (NC) | No-connect terminals | Not bonded; left unconnected per design - no routing or termination required. |
| EP | Exposed thermal paddle | Internally tied to GND; must be soldered to PCB ground plane to achieve specified thermal resistance (24.4mW/°C derating). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated reset supervisor | Eliminates need for external µP supervisor IC while ensuring synchronized power-on reset with oscillator stabilization. |
| Preset 2.5V output | Guaranteed ±2.0% accuracy over full temperature range - suitable for FPGA I/O banks, sensor analog front-ends, and RF bias rails. |
| Low dropout at full load | 114mV at 300mA enables >95% efficiency from 2.614V input - maximizes usable battery voltage range in space-constrained devices. |
| Digital shutdown control | Reduces total system quiescent current to 0.1µA - essential for multi-year battery life in IoT edge sensors and wearables. |
| Reverse current blocking | 0.01µA OUT→IN leakage prevents backup capacitor or supercap discharge into depleted main battery during hot-swap events. |
Applications
| Handheld Instruments | PCMCIA / USB Devices |
|---|---|
Use Scenario: Powering ARM Cortex-M based data loggers with real-time clock and SD card interface in field-deployable PDAs. IC Role / Device Role / Timing Role: Primary 2.5V supply regulator and system-level reset generator ensuring deterministic boot after battery insertion or wake-from-sleep. Use Value: 82µA quiescent current extends battery runtime between calibrations; 150ms reset timeout accommodates slow-start crystal oscillators. |
Use Scenario: Providing regulated 2.5V rail to USB-to-serial bridge ICs and EEPROMs on removable PCMCIA cards. IC Role / Device Role / Timing Role: Local LDO with integrated reset for plug-and-play power sequencing - asserts RESET until VOUT stabilizes post-insertion. Use Value: Eliminates discrete supervisor and saves board space; -7.5% reset threshold matches USB device power-good timing requirements. |
| Cellular Telephones | Digital Cameras |
Use Scenario: Supplying baseband processor I/O voltage in dual-SIM GSM handsets with dynamic power management. IC Role / Device Role / Timing Role: Low-noise 2.5V regulator with shutdown control synchronized to RF transceiver sleep states. Use Value: 0.1µA shutdown current minimizes leakage during deep-sleep modes; thermal shutdown protects against antenna proximity heating. |
Use Scenario: Powering image signal processor (ISP) core and CMOS sensor interface in compact point-and-shoot cameras. IC Role / Device Role / Timing Role: Main 2.5V supply with brownout detection to prevent corrupted frame capture during battery sag. Use Value: 114mV dropout allows operation down to 2.614V - extends usable capacity of two AA alkaline cells by ~12%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76325DBVR | 250mA output, 120mV dropout at 250mA, no integrated reset - requires external supervisor (e.g., TPS3808G18). | Lacks built-in reset; adds BOM count and layout complexity but offers tighter 2% output accuracy over temperature. | Select when higher output accuracy is prioritized over integration and board area savings. |
| ADP160ACBZ-2.5-R7 | 150mA output, 155mV dropout at 150mA, no reset function, 1.5µA quiescent current - ultra-low IQ but lower drive capability. | Suitable only for low-power peripherals (e.g., sensors); cannot replace MAX6470TA25BD3+T in 300mA microprocessor supply roles. | Choose for always-on sensor nodes where 300mA peak load is never required and µA-level IQ dominates design goals. |
Compared with TPS76325DBVR and ADP160ACBZ-2.5-R7, the MAX6470TA25BD3+T uniquely combines 300mA drive, integrated -7.5% reset with 150ms timeout, and 82µA IQ in a single 3×3mm TDFN - enabling smaller footprint and simpler power architecture for portable microprocessor systems.
Availability
MAX6470TA25BD3+T is available at Aetrix Electronics and suitable for handheld instruments, PCMCIA/USB peripheral designs, and cellular telephone subsystems requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX6470TA25BD3+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 communications in demanding environments.
The MAX6469–MAX6484 family was developed specifically for battery-powered portable electronics needing combined regulation and supervision in minimal footprint - targeting PDA, Bluetooth module, and digital camera power architectures.
FAQ
What is the reset threshold accuracy and timeout period for MAX6470TA25BD3+T?
The MAX6470TA25BD3+T features a -7.5% reset threshold (suffix 'A'), meaning RESET asserts when VOUT drops below 2.3125V (7.5% below 2.5V nominal), and a 150ms minimum reset timeout (suffix 'D3'). This ensures reliable microprocessor initialization after power-up or brownout recovery. The device maintains RESET assertion for ≥150ms after VOUT rises above threshold, accommodating slow oscillator start-up times in the MAX6470TA25BD3+T application context.
Does MAX6470TA25BD3+T support adjustable output voltage?
No, MAX6470TA25BD3+T is configured for fixed 2.5V output. Its SET pin is internally connected to enable preset operation - grounding SET selects the factory-trimmed 2.5V output. While the MAX6470 series supports adjustable mode via external resistor dividers on SET, the MAX6470TA25BD3+T variant is specifically ordered with fixed-output programming and does not require or support external feedback components in standard use.
What package type and thermal characteristics does MAX6470TA25BD3+T have?
MAX6470TA25BD3+T uses an 8-pin TDFN-EP package (3mm × 3mm, 0.75mm height) with exposed paddle. Its thermal resistance is 24.4mW/°C above +70°C, supporting up to 1951mW continuous power dissipation at TA = +70°C. The EP must be soldered to a PCB ground plane to achieve rated thermal performance - critical for maintaining junction temperature below +150°C under 300mA load in the MAX6470TA25BD3+T design.
How does MAX6470TA25BD3+T handle reverse current flow from output to input?
MAX6470TA25BD3+T includes reverse-current protection that limits OUT→IN leakage to 0.01µA typical when VOUT > VIN. This prevents backup capacitors or secondary batteries from discharging into a depleted primary source. During such conditions, RESET remains asserted until VIN exceeds VOUT and VOUT rises above the 2.3125V reset threshold - a key safety feature in battery-swappable MAX6470TA25BD3+T implementations.
Is MAX6470TA25BD3+T RoHS-compliant and lead(Pb)-free?
Yes, MAX6470TA25BD3+T is supplied in a lead(Pb)-free/RoHS-compliant package. The '+' in the suffix '+T' explicitly denotes compliance with EU RoHS Directive 2011/65/EU and JEDEC JS-001 standards. No lead-based solder or finishes are used; the device meets IPC/JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) and reflow profile requirements per JEDEC J-STD-020A for the MAX6470TA25BD3+T manufacturing process.
MAX6470TA25BD3+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 (2.5V)
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- 0.25V @ 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)
MAX6470TA25BD3+T FAQ
1.How can I place an order for MAX6470TA25BD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6470TA25BD3+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 MAX6470TA25BD3+T reliable?
The price and inventory of MAX6470TA25BD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6470TA25BD3+T is usually 5 days.
3.What payment methods are accepted for MAX6470TA25BD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6470TA25BD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6470TA25BD3+T?
MAX6470TA25BD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6470TA25BD3+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 MAX6470TA25BD3+T?
For technical support, including MAX6470TA25BD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6470TA25BD3+T requirements.
6.How does Aetrix verify that MAX6470TA25BD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6470TA25BD3+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 MAX6470TA25BD3+T meets industry standards.
7.What is the process for return or replacement of MAX6470TA25BD3+T?
All MAX6470TA25BD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6470TA25BD3+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 MAX6470TA25BD3+T part is unused and in its original packaging.
Return procedure for MAX6470TA25BD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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