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Analog Devices Inc./Maxim Integrated MAX6470TA15BD3+
- Part No.:
- MAX6470TA15BD3+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX6470TA15BD3+.pdf
- Description:
- FIXED/ADJUSTABLE POSITIVE LDO
- Quantity:
- Payment:
- Shipping:
Inventory:297
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Product details
Overview
MAX6470TA15BD3+ from Maxim Integrated is a 300mA low-dropout linear regulator with integrated microprocessor reset circuit, fixed 1.5V output voltage, ±2.0% accuracy over -40°C to +85°C, 114mV dropout at 300mA load, and 150ms minimum reset timeout. It features active-low push-pull RESET, shutdown input (SHDN), 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 MAX6470TA15BD3+ datasheet, MAX6470TA15BD3+ pinout, MAX6470TA15BD3+ application, or MAX6470TA15BD3+ equivalent, key selection criteria include its 150ms reset timeout, 1.5V fixed output with ±2.0% tolerance, 82µA quiescent current, TDFN-EP 8-pin package with exposed pad, and integrated SHDN-controlled shutdown reducing supply current to 0.1µA.
Technical Context
The MAX6470TA15BD3+ integrates a precision LDO regulator core and a fully self-contained reset supervisor sharing the same reference. Its reset circuit monitors VOUT against a -7.5% threshold (A-suffix) and asserts active-low RESET for ≥150ms after recovery, eliminating external supervisors. The device uses an internal pass transistor with thermal shutdown (180°C trip) and reverse-current protection (0.01µA OUT→IN leakage).
It implements dual-mode feedback via the SET pin: grounded for fixed 1.5V output, or configured with external resistors for adjustable operation. Shutdown control is active-low and disables regulation, reducing total supply current to 0.1µA while retaining reset monitoring capability under valid VIN conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±2.0% over -40°C to +85°C - ensures stable core logic or low-voltage sensor supply without external resistor network. |
| Max Output Current | 300mA guaranteed - sufficient for microcontrollers, RF transceivers, or small FPGA I/O banks in portable designs. |
| Dropout Voltage | 114mV at 300mA load - enables operation from single-cell Li-ion (3.0V min) or triple-alkaline (4.5V) sources with minimal headroom loss. |
| Quiescent Current | 82µA typical - extends battery life in always-on monitoring or sleep-mode applications such as Bluetooth modules. |
| Reset Timeout | 150ms minimum - meets boot timing requirements for ARM Cortex-M and similar MCUs requiring >100ms stabilization before release. |
| Supply Range | 2.5V to 5.5V input - compatible with USB-powered peripherals, coin-cell backup systems, and wide-input industrial rails. |
| Shutdown Current | 0.1µA typical - enables ultra-low-power deep-sleep states without disconnecting input power. |
Pinout & Package
MAX6470TA15BD3+ is housed in an 8-pin TDFN-EP (3mm × 3mm) package with exposed thermal pad (EP), rated for continuous operation up to +85°C ambient. The EP must be soldered to PCB ground plane for thermal management and electrical grounding.
| 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 / Thermal Pad Connection | Primary return path and thermal conduction node; must connect to large copper area or internal ground plane. |
| 3 (SHDN) | Active-Low Shutdown Control | Pulled high to IN for normal operation; pulling low disables regulation and reduces IQ to 0.1µA. |
| 4 (RESET) | Active-Low Push-Pull Reset Output | Asserts low during power-up, brownout, or SHDN activation; remains low ≥150ms after VOUT recovers. |
| 5 (SET) | Feedback Selection Input | Connected to GND to select fixed 1.5V output; open or externally biased for adjustable mode (not used in this variant). |
| 6 (OUT) | Regulated Output | Delivers 1.5V at 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 specified thermal resistance (24.4mW/°C derating). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Microprocessor Reset | Eliminates need for external supervisor IC by providing factory-trimmed -7.5% VOUT threshold and 150ms timeout with push-pull RESET. |
| Low Dropout Performance | 114mV dropout at full 300mA load enables efficient use of marginal input voltages (e.g., 1.614V minimum VIN at 1.5V out). |
| Ultra-Low Quiescent Current | 82µA operating current minimizes battery drain in always-on IoT sensors and wearables with multi-year runtime targets. |
| 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-recovering thermal shutdown (180°C trip, 20°C hysteresis) and 450mA current limit ensure robustness in unregulated environments. |
Applications
| Handheld Medical Sensors | USB-Powered Test Equipment |
|---|---|
|
Use Scenario: Portable pulse oximeter with BLE radio and analog front-end powered from single AAA battery. IC Role / Device Role: Primary 1.5V supply for ADC reference and low-power MCU core, with synchronized reset assertion during battery insertion/removal. Use Value: 150ms reset hold-off ensures clean MCU initialization before analog sampling begins, avoiding corrupted measurements during power ramp. |
Use Scenario: Compact oscilloscope probe interface drawing power exclusively from USB 5V bus. IC Role / Device Role: Local 1.5V rail for high-speed comparator and level-shifting logic, regulated from USB-derived 3.3V or 5V. Use Value: 114mV dropout allows direct regulation from 1.65V intermediate rail, minimizing heat generation and enabling fanless enclosure design. |
| Industrial Wireless Node | Smart Meter Communication Module |
|
Use Scenario: LoRaWAN endpoint deployed in remote utility meter with primary alkaline battery and supercapacitor backup. IC Role / Device Role: Main 1.5V supply for sub-GHz transceiver and secure element, with SHDN controlled by host MCU during sleep cycles. Use Value: 0.1µA shutdown current extends 10-year battery life target; RESET signal triggers firmware watchdog reset on brownout detection. |
Use Scenario: PLC-based AMI module interfacing with legacy RS-485 meters and cellular backhaul. IC Role / Device Role: Dedicated 1.5V rail for isolated UART transceivers and real-time clock, decoupled from noisy main 3.3V domain. Use Value: 75µVRMS output noise (shared family spec) ensures jitter-free clock generation for precise time-stamping of consumption data. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS79915YZTT | 1.5V fixed, 200mA, 100mV dropout @ 150mA, no integrated reset - requires external supervisor (e.g., TPS3808G15). | Lacks built-in reset; adds BOM count, layout area, and timing coordination complexity. | Select when board space permits discrete supervision and lower cost outweighs integration benefits. |
| ADP160ACBZ-1.5-R7 | 1.5V fixed, 150mA, 135mV dropout @ 150mA, no reset function, 1.8µA IQ - optimized for ultra-low-IQ, not reset-critical systems. | Insufficient current for 300mA loads; no reset capability limits use in microprocessor-based systems. | Prefer only for non-processor applications like analog sensor biasing where reset sequencing is irrelevant. |
Compared with TPS79915YZTT and ADP160ACBZ-1.5-R7, the MAX6470TA15BD3+ uniquely delivers 300mA drive, integrated 150ms reset, and 82µA IQ in one 8-pin TDFN - reducing component count, simplifying power-up sequencing, and enabling compact, battery-optimized designs without compromising reliability.
Availability
MAX6470TA15BD3+ is available at Aetrix Electronics and suitable for handheld medical sensors, USB-powered test equipment, industrial wireless nodes, smart meter communication modules, and battery-backed IoT edge devices requiring stable component supply with long-term manufacturability assurance.
Supply support for MAX6470TA15BD3+ 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, automotive, and communications markets.
The MAX6469–MAX6484 product line was designed specifically for space-constrained, battery-operated systems needing tightly coupled power regulation and deterministic reset behavior - targeting portable instrumentation, wireless modules, and embedded controllers.
FAQ
What output voltage does the MAX6470TA15BD3+ provide, and how is it set?
The MAX6470TA15BD3+ provides a fixed 1.5V output voltage, factory-trimmed to ±2.0% accuracy over -40°C to +85°C. This value is encoded in the part number suffix "A15", where "A" denotes -7.5% reset threshold and "15" specifies 1.5V. The SET pin is internally connected to GND in this variant, disabling adjustable mode and ensuring consistent 1.5V regulation without external components.
Does the MAX6470TA15BD3+ include a shutdown feature, and what is its effect?
Yes, the MAX6470TA15BD3+ includes an active-low SHDN input (Pin 3). When pulled low, it disables the LDO pass transistor and control circuitry, reducing total supply current to 0.1µA (typ). During shutdown, the RESET output remains asserted if VOUT falls below threshold, preserving system reset state. Normal operation resumes when SHDN is pulled high to VIN.
What is the reset timeout period for the MAX6470TA15BD3+, and how is it selected?
The MAX6470TA15BD3+ has a 150ms minimum reset timeout period, indicated by the "D3" suffix in the part number. This value is factory-programmed and cannot be adjusted externally. The RESET output stays low for ≥150ms after VOUT rises above the -7.5% threshold, ensuring sufficient time for microprocessor clocks and memory to stabilize before execution begins.
What package type and thermal characteristics apply to the MAX6470TA15BD3+?
The MAX6470TA15BD3+ uses an 8-pin TDFN-EP package (3mm × 3mm) with exposed thermal pad (EP). 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 the PCB ground plane to achieve rated performance and prevent junction overheating under 300mA load.
How does the MAX6470TA15BD3+ handle reverse current flow from output to input?
The MAX6470TA15BD3+ incorporates internal reverse-current protection that limits OUT-to-IN leakage to 0.01µA (typ) when VOUT > VIN. This prevents backfeeding into a depleted battery or unintended powering of upstream circuitry. During such conditions, RESET remains asserted until VIN exceeds VOUT and VOUT rises above the -7.5% threshold, maintaining safe system state.
MAX6470TA15BD3+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- 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 (1.5V)
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- -
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 136 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, Reset
- 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-EP (3x3)
MAX6470TA15BD3+ FAQ
1.How can I place an order for MAX6470TA15BD3+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6470TA15BD3+ 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 MAX6470TA15BD3+ reliable?
The price and inventory of MAX6470TA15BD3+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6470TA15BD3+ is usually 5 days.
3.What payment methods are accepted for MAX6470TA15BD3+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6470TA15BD3+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6470TA15BD3+?
MAX6470TA15BD3+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6470TA15BD3+ 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 MAX6470TA15BD3+?
For technical support, including MAX6470TA15BD3+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6470TA15BD3+ requirements.
6.How does Aetrix verify that MAX6470TA15BD3+ is sourced from the original manufacturer or authorized distributors?
All MAX6470TA15BD3+ 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 MAX6470TA15BD3+ meets industry standards.
7.What is the process for return or replacement of MAX6470TA15BD3+?
All MAX6470TA15BD3+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6470TA15BD3+, 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 MAX6470TA15BD3+ part is unused and in its original packaging.
Return procedure for MAX6470TA15BD3+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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